文章目录
25.1 旅游网
25.1.1 项目导入
-
点击绿色+按钮
-
选择travel项目的pom.xml文件,点击ok,完成项目导入。需要等待一小会,项目初始化完成。
25.1.1 项目启动
25.1.3 技术选型
- Web层
- a) Servlet:前端控制器
- b) html:视图(页面展示)
- c) Filter:过滤器
- d) BeanUtils:数据封装成对象
- e) Jackson:json序列化工具(异步提交数据,返回服务器响应数据)
- Service层
- f) Javamail:java发送邮件工具
- g) Redis:nosql内存数据库(提升查询性能)
- h) Jedis:java的redis客户端
- Dao层
- i) Mysql:数据库
- j) Druid:数据库连接池
- k) JdbcTemplate:jdbc的工具
25.1.4 创建数据库
25.2 注册功能
25.2.1 注册功能_功能分析
- 图示:
25.2.3 注册功能_前台_表单校验
- regist.html
<script>
/*
表单校验:
1.用户名:单词字符,长度8到20位
2.密码:单词字符,长度8到20位
3.email:邮件格式
4.姓名:非空
5.手机号:手机号格式
6.出生日期:非空
7.验证码:非空
*/
//校验用户名
//单词字符,长度8到20位
function checkUsername() {
//1.获取用户名值
var username = $("#username").val();
//2.定义正则
var reg_username = /^\w{8,20}$/;
//3.判断,给出提示信息
var flag = reg_username.test(username);
if(flag){
//用户名合法
$("#username").css("border","");
}else{
//用户名非法,加一个红色边框
$("#username").css("border","1px solid red");
}
return flag;
}
//校验密码
function checkPassword() {
//1.获取密码值
var password = $("#password").val();
//2.定义正则
var reg_password = /^\w{8,20}$/;
//3.判断,给出提示信息
var flag = reg_password.test(password);
if(flag){
//密码合法
$("#password").css("border","");
}else{
//密码非法,加一个红色边框
$("#password").css("border","1px solid red");
}
return flag;
}
//校验邮箱
function checkEmail(){
//1.获取邮箱
var email = $("#email").val();
//2.定义正则 [email protected]
var reg_email = /^\w+@\w+\.\w+$/;
//3.判断
var flag = reg_email.test(email);
if(flag){
$("#email").css("border","");
}else{
$("#email").css("border","1px solid red");
}
return flag;
}
$(function () {
//当表单提交时,调用所有的校验方法
$("#registerForm").submit(function(){
return checkUsername() && checkPassword() && checkEmail()
//如果这个方法没有返回值,或者返回为true,则表单提交,如果返回为false,则表单不提交
});
//当某一个组件失去焦点是,调用对应的校验方法
$("#username").blur(checkUsername);
$("#password").blur(checkPassword);
$("#email").blur(checkEmail);
});
</script>
25.2.2 注册功能_前台_异步提交表单
- 在此使用异步提交表单是为了获取服务器响应的数据。因为我们前台使用的是html作为视图层,不能够直接从servlet相关的域对象获取值,只能通过ajax获取响应数据。
- regist.html
<script>
$(function () {
//当表单提交时,调用所有的校验方法
$("#registerForm").submit(function(){
//1.发送数据到服务器
if(checkUsername() && checkPassword() && checkEmail()){
//校验通过,发送ajax请求,提交表单的数据 username=zhangsan&password=123
//jquery提供的方法serialize(),能够将表单数据序列化,如:username=zhangsan&password=123
$.post("registUserServlet",$(this).serialize(),function(data){
});
}
//2.不让页面跳转
return false;
//如果这个方法没有返回值,或者返回为true,则表单提交,如果返回为false,则表单不提交
});
//当某一个组件失去焦点是,调用对应的校验方法
$("#username").blur(checkUsername);
$("#password").blur(checkPassword);
$("#email").blur(checkEmail);
});
</script>
25.2.4 注册功能_后台_Servlet代码实现
- RegistServlet.java
package cn.itcast.travel.web.servlet;
import cn.itcast.travel.domain.ResultInfo;
import cn.itcast.travel.domain.User;
import cn.itcast.travel.service.UserService;
import cn.itcast.travel.service.impl.UserServiceImpl;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet("/registUserServlet")
public class RegistUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.获取数据
Map<String, String[]> map = request.getParameterMap();
//2.封装对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//3.调用service完成注册
UserService service = new UserServiceImpl();
boolean flag = service.regist(user);
ResultInfo info = new ResultInfo();
//4.响应结果
if(flag){
//注册成功
info.setFlag(true);
}else{
//注册失败
info.setFlag(false);
info.setErrorMsg("注册失败!");
}
//将info对象序列化为json
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(info);
//将json数据写回客户端
//设置content-type
response.setContentType("application/json;charset=utf-8");
response.getWriter().write(json);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
25.2.5 注册功能_后台_UserDao代码实现
- UserDao
package cn.itcast.travel.dao;
import cn.itcast.travel.domain.User;
public interface UserDao {
/**
* 根据用户名查询用户信息
* @param username
* @return
*/
public User findByUsername(String username);
/**
* 用户保存
* @param user
*/
public void save(User user);
}
- UserDaoImpl
package cn.itcast.travel.dao.impl;
import cn.itcast.travel.dao.UserDao;
import cn.itcast.travel.domain.User;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
public class UserDaoImpl implements UserDao{
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
@Override
public User findByUsername(String username) {
User user = null;
try {
//1.定义sql
String sql = "select * from tab_user where username = ?";
//2.执行sql
user = template.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class), username);
} catch (Exception e) {
}
return user;
}
@Override
public void save(User user) {
//1.定义sql
String sql = "insert into tab_user(username,password,name,birthday,sex,telephone,email,status,code) values(?,?,?,?,?,?,?,?,?)";
//2.执行sql
template.update(sql,user.getUsername(),
user.getPassword(),
user.getName(),
user.getBirthday(),
user.getSex(),
user.getTelephone(),
user.getEmail(),
user.getStatus(),
user.getCode()
);
}
}
25.2.6 注册功能_后台_UserService代码实现
- UserService
package cn.itcast.travel.service;
import cn.itcast.travel.domain.User;
public interface UserService {
/**
* 注册用户
* @param user
* @return
*/
boolean regist(User user);
}
- UserServiceImpl
package cn.itcast.travel.service.impl;
import cn.itcast.travel.dao.UserDao;
import cn.itcast.travel.dao.impl.UserDaoImpl;
import cn.itcast.travel.domain.User;
import cn.itcast.travel.service.UserService;
public class UserServiceImpl implements UserService {
private UserDao userDao = new UserDaoImpl();
@Override
public boolean regist(User user) {
//1.根据用户名查询用户对象
User u = userDao.findByUsername(user.getUsername());
//判断u是否为null
if(u != null){
//用户名存在,注册失败
return false;
}
userDao.save(user);
return true;
}
}
25.2.7 注册功能_后台_验证码前台数据处理
- RegistServlet.java
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//验证校验
String check = request.getParameter("check");
//从sesion中获取验证码
HttpSession session = request.getSession();
String checkcode_server = (String) session.getAttribute("CHECKCODE_SERVER");
session.removeAttribute("CHECKCODE_SERVER");//为了保证验证码只能使用一次
//比较
if(checkcode_server == null || !checkcode_server.equalsIgnoreCase(check)){
//验证码错误
ResultInfo info = new ResultInfo();
//注册失败
info.setFlag(false);
info.setErrorMsg("验证码错误");
//将info对象序列化为json
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(info);
response.setContentType("application/json;charset=utf-8");
response.getWriter().write(json);
return;
}
//1.获取数据
Map<String, String[]> map = request.getParameterMap();
//2.封装对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//3.调用service完成注册
UserService service = new UserServiceImpl();
boolean flag = service.regist(user);
ResultInfo info = new ResultInfo();
//4.响应结果
if(flag){
//注册成功
info.setFlag(true);
}else{
//注册失败
info.setFlag(false);
info.setErrorMsg("注册失败!");
}
//将info对象序列化为json
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(info);
//将json数据写回客户端
//设置content-type
response.setContentType("application/json;charset=utf-8");
response.getWriter().write(json);
}
Regist.html
<script>
$(function () {
//当表单提交时,调用所有的校验方法
$("#registerForm").submit(function(){
//1.发送数据到服务器
if(checkUsername() && checkPassword() && checkEmail()){
//校验通过,发送ajax请求,提交表单的数据 username=zhangsan&password=123
$.post("registUserServlet",$(this).serialize(),function(data){
//处理服务器响应的数据 data {flag:true,errorMsg:"注册失败"}
if(data.flag){
//注册成功,跳转成功页面
location.href="register_ok.html";
}else{
//注册失败,给errorMsg添加提示信息
$("#errorMsg").html(data.errorMsg);
}
});
}
//2.不让页面跳转
return false;
//如果这个方法没有返回值,或者返回为true,则表单提交,如果返回为false,则表单不提交
});
//当某一个组件失去焦点是,调用对应的校验方法
$("#username").blur(checkUsername);
$("#password").blur(checkPassword);
$("#email").blur(checkEmail);
});
</script>
25.2.8 注册功能_邮件激活分析
- 为什么要进行邮件激活?
- 为了保证用户填写的邮箱是正确的。将来可以推广一些宣传信息,到用户邮箱中。
- 图示:
25.2.9 注册功能_邮件激活_发送邮件
- 1.申请邮箱;
- 2.开启授权码;
- 3.在MailUtils中设置自己的邮箱账号和密码(授权码)。
- 邮件工具类:MailUtils,调用其中sendMail方法可以完成邮件发送。
- 例如:163邮箱开启授权码
25.2.10 注册功能_邮件激活_点击激活分析
- 用户激活其实就是修改用户表中的status为‘Y’
- ***图示:***
- UserServiceImpl.java
@Override
public boolean regist(User user) {
//1.根据用户名查询用户对象
User u = userDao.findByUsername(user.getUsername());
//判断u是否为null
if(u != null){
//用户名存在,注册失败
return false;
}
//2.保存用户信息
//2.1设置激活码,唯一字符串
user.setCode(UuidUtil.getUuid());
//2.2设置激活状态
user.setStatus("N");
userDao.save(user);
//3.激活邮件发送,邮件正文?
String content="<a href='http://localhost/travel/activeUserServlet?code="+user.getCode()+"'>点击激活旅游网</a>";
MailUtils.sendMail(user.getEmail(),content,"激活邮件");
return true;
}
25.2.11 注册功能_邮件激活_Servlet代码实现
- ActiveUserServlet .java
package cn.itcast.travel.web.servlet;
import cn.itcast.travel.service.UserService;
import cn.itcast.travel.service.impl.UserServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/activeUserServlet")
public class ActiveUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.获取激活码
String code = request.getParameter("code");
if(code != null){
//2.调用service完成激活
UserService service = new UserServiceImpl();
boolean flag = service.active(code);
//3.判断标记
String msg = null;
if(flag){
//激活成功
msg = "激活成功,请<a href='login.html'>登录</a>";
}else{
//激活失败
msg = "激活失败,请联系管理员!";
}
response.setContentType("text/html;charset=utf-8");
response.getWriter().write(msg);
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
25.2.12 注册功能_邮件激活_Service与Dao代码实现
- UserDao.java
/**
* 根据激活码查询用户对象
* @param code
* @return
*/
User findByCode(String code);
/**
* 修改激活状态
* @param user
*/
void updateStatus(User user);
- UserDaoImpl.java
/**
* 根据激活码查询用户对象
* @param code
* @return
*/
@Override
public User findByCode(String code) {
User user = null;
try {
String sql = "select * from tab_user where code = ?";
user = template.queryForObject(sql,new BeanPropertyRowMapper<User>(User.class),code);
} catch (DataAccessException e) {
e.printStackTrace();
}
return user;
}
/**
* 修改指定用户激活状态
* @param user
*/
@Override
public void updateStatus(User user) {
String sql = " update tab_user set status = 'Y' where uid=?";
template.update(sql,user.getUid());
}
- UserService.java
/**
* 激活用户
* @param code
* @return
*/
boolean active(String code);
- UserServiceImpl.java
/**
* 激活用户
* @param code
* @return
*/
@Override
public boolean active(String code) {
//1.根据激活码查询用户对象
User user = userDao.findByCode(code);
if(user != null){
//2.调用dao的修改激活状态的方法
userDao.updateStatus(user);
return true;
}else{
return false;
}
}
25.3 登录功能
25.3.1 登录功能_功能分析
- 图示:
25.3.2 登录功能_前台_代码实现
- login.html
<script>
$(function () {
//1.给登录按钮绑定单击事件
$("#btn_sub").click(function () {
//2.发送ajax请求,提交表单数据
$.post("loginServlet",$("#loginForm").serialize(),function (data) {
//data : {flag:false,errorMsg:''}
if(data.flag){
//登录成功
location.href="index.html";
}else{
//登录失败
$("#errorMsg").html(data.errorMsg);
}
});
});
});
//3.处理响应结果
</script>
25.3.3 登录功能_后台_Servlet实现
- LoginServlet
package cn.itcast.travel.web.servlet;
import cn.itcast.travel.domain.ResultInfo;
import cn.itcast.travel.domain.User;
import cn.itcast.travel.service.UserService;
import cn.itcast.travel.service.impl.UserServiceImpl;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.获取用户名和密码数据
Map<String, String[]> map = request.getParameterMap();
//2.封装User对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//3.调用Service查询
UserService service = new UserServiceImpl();
User u = service.login(user);
ResultInfo info = new ResultInfo();
//4.判断用户对象是否为null
if(u == null){
//用户名密码或错误
info.setFlag(false);
info.setErrorMsg("用户名密码或错误");
}
//5.判断用户是否激活
if(u != null && !"Y".equals(u.getStatus())){
//用户尚未激活
info.setFlag(false);
info.setErrorMsg("您尚未激活,请激活");
}
//6.判断登录成功
if(u != null && "Y".equals(u.getStatus())){
request.getSession().setAttribute("user",u);//登录成功标记
//登录成功
info.setFlag(true);
}
//响应数据
ObjectMapper mapper = new ObjectMapper();
response.setContentType("application/json;charset=utf-8");
mapper.writeValue(response.getOutputStream(),info);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
25.3.4 登录功能_后台_Service实现
- UserService.java
/**
* 登录方法
* @param user
* @return
*/
User login(User user);
- UserServiceImpl.java
/**
* 登录方法
* @param user
* @return
*/
@Override
public User login(User user) {
return userDao.findByUsernameAndPassword(user.getUsername(),user.getPassword());
}
25.3.5 登录功能_后台_Dao实现
- UserDao.java
/**
* 根据用户名和密码查询的方法
* @param username
* @param password
* @return
*/
User findByUsernameAndPassword(String username, String password);
- UserDaoImpl.java
/**
* 根据用户名和密码查询的方法
* @param username
* @param password
* @return
*/
@Override
public User findByUsernameAndPassword(String username, String password) {
User user = null;
try {
//1.定义sql
String sql = "select * from tab_user where username = ? and password = ?";
//2.执行sql
user = template.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class), username,password);
} catch (Exception e) {
}
return user;
}
25.3.6 登录功能_姓名提示
header.html
<script>
$(function () {
$.get("findUserServlet",{
},function (data) {
//{uid:1,name:'李四'}
var msg = "欢迎回来,"+data.name;
$("#span_username").html(msg);
});
});
</script>
- FindUserServlet .java
package cn.itcast.travel.web.servlet;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/findUserServlet")
public class FindUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//从session中获取登录用户
Object user = request.getSession().getAttribute("user");
//将user写回客户端
ObjectMapper mapper = new ObjectMapper();
response.setContentType("application/json;charset=utf-8");
mapper.writeValue(response.getOutputStream(),user);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
25.4 退出功能
- 实现步骤:
- 访问servlet,将session销毁
- 跳转到登录页面
- header.html
<!-- 登录状态 -->
<div class="login">
<span id="span_username"></span>
<a href="myfavorite.html" class="collection">我的收藏</a>
<a href="javascript:location.href='exitServlet';">退出</a>
</div>
- ExitServlet .java
package cn.itcast.travel.web.servlet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/exitServlet")
public class ExitServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.销毁session
request.getSession().invalidate();
//2.跳转登录页面
response.sendRedirect(request.getContextPath()+"/login.html");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
25.5 优化Servlet
25.5.1 分析
- 优化 Servlet目的:
- 减少Servlet的数量,现在是一个功能一个Servlet,将其优化为一个模块一个Servlet,相当于在数据库中一张表对应一个Servlet,在Servlet中提供不同的方法,完成用户的请求。
- 图示:
- Idea控制台中文乱码解决:
25.5.2 BaseServlet 抽取
package cn.itcast.travel.web.servlet;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class BaseServlet extends HttpServlet {
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//System.out.println("baseServlet的service方法被执行了...");
//完成方法分发
//1.获取请求路径
String uri = req.getRequestURI();
System.out.println("请求uri:"+uri);// /travel/user/add
//2.获取方法名称
String methodName = uri.substring(uri.lastIndexOf('/') + 1);
System.out.println("方法名称:"+methodName);
//3.获取方法对象Method
//谁调用我?我代表谁
System.out.println(this);//UserServlet的对象cn.itcast.travel.web.servlet.UserServlet@4903d97e
try {
//获取方法
Method method = this.getClass().getMethod(methodName, HttpServletRequest.class, HttpServletResponse.class);
//4.执行方法
method.invoke(this,req,resp);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
25.5.6 UserServlet 优化
- 将之前的Servlet实现的功能,抽取到UserServlet中的不同方法中实现,并且将UserService创建抽取到成员变量位置。
- UserServlet.java
package cn.itcast.travel.web.servlet;
import cn.itcast.travel.domain.ResultInfo;
import cn.itcast.travel.domain.User;
import cn.itcast.travel.service.UserService;
import cn.itcast.travel.service.impl.UserServiceImpl;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet("/user/*") // /user/add /user/find
public class UserServlet extends BaseServlet {
//声明UserService业务对象
private UserService service = new UserServiceImpl();
/**
* 注册功能
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void regist(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//验证校验
String check = request.getParameter("check");
//从sesion中获取验证码
HttpSession session = request.getSession();
String checkcode_server = (String) session.getAttribute("CHECKCODE_SERVER");
session.removeAttribute("CHECKCODE_SERVER");//为了保证验证码只能使用一次
//比较
if(checkcode_server == null || !checkcode_server.equalsIgnoreCase(check)){
//验证码错误
ResultInfo info = new ResultInfo();
//注册失败
info.setFlag(false);
info.setErrorMsg("验证码错误");
//将info对象序列化为json
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(info);
response.setContentType("application/json;charset=utf-8");
response.getWriter().write(json);
return;
}
//1.获取数据
Map<String, String[]> map = request.getParameterMap();
//2.封装对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//3.调用service完成注册
//UserService service = new UserServiceImpl();
boolean flag = service.regist(user);
ResultInfo info = new ResultInfo();
//4.响应结果
if(flag){
//注册成功
info.setFlag(true);
}else{
//注册失败
info.setFlag(false);
info.setErrorMsg("注册失败!");
}
//将info对象序列化为json
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(info);
//将json数据写回客户端
//设置content-type
response.setContentType("application/json;charset=utf-8");
response.getWriter().write(json);
}
/**
* 登录功能
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.获取用户名和密码数据
Map<String, String[]> map = request.getParameterMap();
//2.封装User对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//3.调用Service查询
// UserService service = new UserServiceImpl();
User u = service.login(user);
ResultInfo info = new ResultInfo();
//4.判断用户对象是否为null
if(u == null){
//用户名密码或错误
info.setFlag(false);
info.setErrorMsg("用户名密码或错误");
}
//5.判断用户是否激活
if(u != null && !"Y".equals(u.getStatus())){
//用户尚未激活
info.setFlag(false);
info.setErrorMsg("您尚未激活,请激活");
}
//6.判断登录成功
if(u != null && "Y".equals(u.getStatus())){
request.getSession().setAttribute("user",u);//登录成功标记
//登录成功
info.setFlag(true);
}
//响应数据
ObjectMapper mapper = new ObjectMapper();
response.setContentType("application/json;charset=utf-8");
mapper.writeValue(response.getOutputStream(),info);
}
/**
* 查询单个对象
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void findOne(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//从session中获取登录用户
Object user = request.getSession().getAttribute("user");
//将user写回客户端
/* ObjectMapper mapper = new ObjectMapper();
response.setContentType("application/json;charset=utf-8");
mapper.writeValue(response.getOutputStream(),user);*/
writeValue(user,response);
}
/**
* 退出功能
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void exit(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.销毁session
request.getSession().invalidate();
//2.跳转登录页面
response.sendRedirect(request.getContextPath()+"/login.html");
}
/**
* 激活功能
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void active(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.获取激活码
String code = request.getParameter("code");
if(code != null){
//2.调用service完成激活
//UserService service = new UserServiceImpl();
boolean flag = service.active(code);
//3.判断标记
String msg = null;
if(flag){
//激活成功
msg = "激活成功,请<a href='login.html'>登录</a>";
}else{
//激活失败
msg = "激活失败,请联系管理员!";
}
response.setContentType("text/html;charset=utf-8");
response.getWriter().write(msg);
}
}
}
25.6 分类数据展示功能
25.6.1 分类数据展示功能_功能分析
- 图示:
25.6.2 分类数据展示功能_后台_代码实现
- CategoryServlet .java
package cn.itcast.travel.web.servlet;
import cn.itcast.travel.domain.Category;
import cn.itcast.travel.service.CategoryService;
import cn.itcast.travel.service.impl.CategoryServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
@WebServlet("/category/*")
public class CategoryServlet extends BaseServlet {
private CategoryService service = new CategoryServiceImpl();
/**
* 查询所有
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void findAll(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.调用service查询所有
List<Category> cs = service.findAll();
//2.序列化json返回
/* ObjectMapper mapper = new ObjectMapper();
response.setContentType("application/json;charset=utf-8");
mapper.writeValue(response.getOutputStream(),cs);*/
writeValue(cs,response);
}
}
25.6.3 分类数据展示功能_前台_代码实现
- header.html
<script>
//查询分类数据
$.get("category/findAll",{
},function (data) {
//[{cid:1,cname:国内游},{},{}]
var lis = '<li class="nav-active"><a href="index.html">首页</a></li>';
//遍历数组,拼接字符串(<li>)
for (var i = 0; i < data.length; i++) {
var li = '<li><a href="route_list.html?cid='+data[i].cid+'">'+data[i].cname+'</a></li>';
lis += li;
}
//拼接收藏排行榜的li,<li><a href="favoriterank.html">收藏排行榜</a></li>
lis+= '<li><a href="favoriterank.html">收藏排行榜</a></li>';
//将lis字符串,设置到ul的html内容中
$("#category").html(lis);
});
</script>
- header.html
<!-- 首页导航 -->
<div class="navitem">
<ul id="category" class="nav">
</ul>
</div>
25.6.4 分类数据展示功能_缓存优化_分析
- 分析发现,分类的数据在每一次页面加载后都会重新请求数据库来加载,对数据库的压力比较大,而且分类的数据不会经常产生变化,所有可以使用redis来缓存这个数据。
- 图示:
25.6.5 分类数据展示功能_缓存优化_代码实现
- CategoryServiceImpl.java
/**
* 查询所有分类
* @return
*/
@Override
public List<Category> findAll() {
//1.从redis中查询
//1.1获取jedis客户端
Jedis jedis = JedisUtil.getJedis();
//1.2可使用sortedset排序查询
Set<String> categorys = jedis.zrange("category", 0, -1);
List<Category> cs = null;
//2.判断查询的集合是否为空
if (categorys == null || categorys.size() == 0) {
System.out.println("从数据库查询....");
//3.如果为空,需要从数据库查询,在将数据存入redis
//3.1 从数据库查询
cs = categoryDao.findAll();
//3.2 将集合数据存储到redis中的 category的key
for (int i = 0; i < cs.size(); i++) {
jedis.zadd("category", cs.get(i).getCid(), cs.get(i).getCname());
}
} else {
System.out.println("从redis中查询.....");
//4.如果不为空,将set的数据存入list
cs = new ArrayList<Category>();
for (String name : categorys) {
Category category = new Category();
category.setCname(name);
cs.add(category);
}
}
return cs;
}
25.7 旅游线路分页展示功能
25.7.1 旅游线路分页展示_类别id传递
- CategoryServiceImpl.java
@Override
public List<Category> findAll() {
//1.从redis中查询
//1.1获取jedis客户端
Jedis jedis = JedisUtil.getJedis();
//1.2可使用sortedset排序查询
//Set<String> categorys = jedis.zrange("category", 0, -1);
//1.3查询sortedset中的分数(cid)和值(cname)
Set<Tuple> categorys = jedis.zrangeWithScores("category", 0, -1);
List<Category> cs = null;
//2.判断查询的集合是否为空
if (categorys == null || categorys.size() == 0) {
System.out.println("从数据库查询....");
//3.如果为空,需要从数据库查询,在将数据存入redis
//3.1 从数据库查询
cs = categoryDao.findAll();
//3.2 将集合数据存储到redis中的 category的key
for (int i = 0; i < cs.size(); i++) {
jedis.zadd("category", cs.get(i).getCid(), cs.get(i).getCname());
}
} else {
System.out.println("从redis中查询.....");
//4.如果不为空,将set的数据存入list
cs = new ArrayList<Category>();
for (Tuple tuple : categorys) {
Category category = new Category();
category.setCname(tuple.getElement());
category.setCid((int)tuple.getScore());
cs.add(category);
}
}
return cs;
}
25.7.2 旅游线路分页展示_分析
- 图示:
25.7.3 旅游线路分页展示_前台
- route_list.html
<script>
$(function () {
var search = location.search;
//alert(search);//?id=5
// 切割字符串,拿到第二个值
var cid = search.split("=")[1];
//当页码加载完成后,调用load方法,发送ajax请求加载数据
load(cid);
});
function load(cid ,currentPage){
//发送ajax请求,请求route/pageQuery,传递cid
$.get("route/pageQuery",{
cid:cid,currentPage:currentPage},function (pb) {
//解析pagebean数据,展示到页面上
//1.分页工具条数据展示
//1.1 展示总页码和总记录数
$("#totalPage").html(pb.totalPage);
$("#totalCount").html(pb.totalCount);
var lis = "";
var fristPage = '<li οnclick="javascipt:load('+cid+')"><a href="javascript:void(0)">首页</a></li>';
//计算上一页的页码
var beforeNum = pb.currentPage - 1;
if(beforeNum <= 0){
beforeNum = 1;
}
var beforePage = '<li οnclick="javascipt:load('+cid+','+beforeNum+')" class="threeword"><a href="javascript:void(0)">上一页</a></li>';
lis += fristPage;
lis += beforePage;
//1.2 展示分页页码
/*
1.一共展示10个页码,能够达到前5后4的效果
2.如果前边不够5个,后边补齐10个
3.如果后边不足4个,前边补齐10个
*/
// 定义开始位置begin,结束位置 end
var begin; // 开始位置
var end ; // 结束位置
//1.要显示10个页码
if(pb.totalPage < 10){
//总页码不够10页
begin = 1;
end = pb.totalPage;
}else{
//总页码超过10页
begin = pb.currentPage - 5 ;
end = pb.currentPage + 4 ;
//2.如果前边不够5个,后边补齐10个
if(begin < 1){
begin = 1;
end = begin + 9;
}
//3.如果后边不足4个,前边补齐10个
if(end > pb.totalPage){
end = pb.totalPage;
begin = end - 9 ;
}
}
for (var i = begin; i <= end ; i++) {
var li;
//判断当前页码是否等于i
if(pb.currentPage == i){
li = '<li class="curPage" οnclick="javascipt:load('+cid+','+i+')"><a href="javascript:void(0)">'+i+'</a></li>';
}else{
//创建页码的li
li = '<li οnclick="javascipt:load('+cid+','+i+')"><a href="javascript:void(0)">'+i+'</a></li>';
}
//拼接字符串
lis += li;
}
var lastPage = '<li class="threeword"><a href="javascript:;">末页</a></li>';
var nextPage = '<li class="threeword"><a href="javascript:;">下一页</a></li>';
lis += nextPage;
lis += lastPage;
//将lis内容设置到 ul
$("#pageNum").html(lis);
//2.列表数据展示
var route_lis = "";
for (var i = 0; i < pb.list.length; i++) {
//获取{rid:1,rname:"xxx"}
var route = pb.list[i];
var li = '<li>\n' +
' <div class="img"><img src="'+route.rimage+'" style="width: 299px;"></div>\n' +
' <div class="text1">\n' +
' <p>'+route.rname+'</p>\n' +
' <br/>\n' +
' <p>'+route.routeIntroduce+'</p>\n' +
' </div>\n' +
' <div class="price">\n' +
' <p class="price_num">\n' +
' <span>¥</span>\n' +
' <span>'+route.price+'</span>\n' +
' <span>起</span>\n' +
' </p>\n' +
' <p><a href="route_detail.html">查看详情</a></p>\n' +
' </div>\n' +
' </li>';
route_lis += li;
}
$("#route").html(route_lis);
//定位到页面顶部
window.scrollTo(0,0);
});
}
</script>
25.7.4 旅游线路分页展示_后台_Servlet
- RouteServlet.java
package cn.itcast.travel.web.servlet;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.service.RouteService;
import cn.itcast.travel.service.impl.RouteServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/route/*")
public class RouteServlet extends BaseServlet {
private RouteService routeService = new RouteServiceImpl();
/**
* 分页查询
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void pageQuery(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.接受参数
String currentPageStr = request.getParameter("currentPage");
String pageSizeStr = request.getParameter("pageSize");
String cidStr = request.getParameter("cid");
int cid = 0;//类别id
//2.处理参数
if(cidStr != null && cidStr.length() > 0){
cid = Integer.parseInt(cidStr);
}
int currentPage = 0;//当前页码,如果不传递,则默认为第一页
if(currentPageStr != null && currentPageStr.length() > 0){
currentPage = Integer.parseInt(currentPageStr);
}else{
currentPage = 1;
}
int pageSize = 0;//每页显示条数,如果不传递,默认每页显示5条记录
if(pageSizeStr != null && pageSizeStr.length() > 0){
pageSize = Integer.parseInt(pageSizeStr);
}else{
pageSize = 5;
}
//3. 调用service查询PageBean对象
PageBean<Route> pb = routeService.pageQuery(cid, currentPage, pageSize);
//4. 将pageBean对象序列化为json,返回
writeValue(pb,response);
}
}
25.7.5 旅游线路分页展示_后台_Dao
- RouteDao.java
package cn.itcast.travel.dao;
import cn.itcast.travel.domain.Route;
import java.util.List;
public interface RouteDao {
/**
* 根据cid查询总记录数
*/
public int findTotalCount(int cid);
/**
* 根据cid,start,pageSize查询当前页的数据集合
*/
public List<Route> findByPage(int cid, int start, int pageSize);
}
- RouteDaoImpl .java
package cn.itcast.travel.dao.impl;
import cn.itcast.travel.dao.RouteDao;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.List;
public class RouteDaoImpl implements RouteDao {
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
/**
* 根据cid查询总记录数
* @param cid
* @return
*/
@Override
public int findTotalCount(int cid) {
String sql = "select count(*) from tab_route where cid = ?";
return template.queryForObject(sql,Integer.class,cid);
}
/**
* 根据cid,start,pageSize查询当前页的数据集合
* @param cid
* @param start
* @param pageSize
* @return
*/
@Override
public List<Route> findByPage(int cid, int start, int pageSize) {
String sql = "select * from tab_route where cid = ? limit ? , ?";
return template.query(sql,new BeanPropertyRowMapper<Route>(Route.class),cid,start,pageSize);
}
}
25.7.6 旅游线路分页展示_后台_Service
- RouteService.java
package cn.itcast.travel.service;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
/**
* 线路Service
*/
public interface RouteService {
/**
* 根据类别进行分页查询
* @param cid
* @param currentPage
* @param pageSize
* @return
*/
public PageBean<Route> pageQuery(int cid, int currentPage, int pageSize);
}
- RouteServiceImpl .java
package cn.itcast.travel.service.impl;
import cn.itcast.travel.dao.RouteDao;
import cn.itcast.travel.dao.impl.RouteDaoImpl;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.service.RouteService;
import java.util.List;
public class RouteServiceImpl implements RouteService {
private RouteDao routeDao = new RouteDaoImpl();
/**
* 根据类别进行分页查询
* @param cid
* @param currentPage
* @param pageSize
* @return
*/
@Override
public PageBean<Route> pageQuery(int cid, int currentPage, int pageSize) {
//封装PageBean
PageBean<Route> pb = new PageBean<Route>();
//设置当前页码
pb.setCurrentPage(currentPage);
//设置每页显示条数
pb.setPageSize(pageSize);
//设置总记录数
int totalCount = routeDao.findTotalCount(cid);
pb.setTotalCount(totalCount);
//设置当前页显示的数据集合
int start = (currentPage - 1) * pageSize;//开始的记录数
List<Route> list = routeDao.findByPage(cid,start,pageSize);
pb.setList(list);
//设置总页数 = 总记录数/每页显示条数
int totalPage = totalCount % pageSize == 0 ? totalCount / pageSize :(totalCount / pageSize) + 1 ;
pb.setTotalPage(totalPage);
return pb;
}
}
25.8 旅游线路查询
25.8.1 旅游线路查询_参数传递
- header.html
<script>
//给搜索按钮绑定单击事件,获取搜索输入框的内容
$("#search-button").click(function () {
//线路名称
var rname = $("#search_input").val();
var cid = getParameter("cid");
// 跳转路径 http://localhost/travel/route_list.html?cid=5,拼接上rname=xxx
location.href="http://localhost/travel/route_list.html?cid="+cid+"&rname="+rname;
});
</script>
- route_list.html
<script>
$(function () {
//获取cid的参数值
var cid = getParameter("cid");
//获取rname的参数值
var rname = getParameter("rname");
//判断rname如果不为null或者""
if(rname){
//url解码
rname = window.decodeURIComponent(rname);
}
//当页码加载完成后,调用load方法,发送ajax请求加载数据
load(cid,null,rname);
});
</script>
25.8.2 旅游线路查询_后台_修改分类数据展示代码
- RouteServlet.java
package cn.itcast.travel.web.servlet;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.service.RouteService;
import cn.itcast.travel.service.impl.RouteServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/route/*")
public class RouteServlet extends BaseServlet {
private RouteService routeService = new RouteServiceImpl();
/**
* 分页查询
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void pageQuery(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.接受参数
String currentPageStr = request.getParameter("currentPage");
String pageSizeStr = request.getParameter("pageSize");
String cidStr = request.getParameter("cid");
//接受rname 线路名称
String rname = request.getParameter("rname");
//解决乱码问题
rname = new String(rname.getBytes("iso-8859-1"),"utf-8");
int cid = 0;//类别id
//2.处理参数
if(cidStr != null && cidStr.length() > 0 && !"null".equals(cidStr)){
cid = Integer.parseInt(cidStr);
}
int currentPage = 0;//当前页码,如果不传递,则默认为第一页
if(currentPageStr != null && currentPageStr.length() > 0){
currentPage = Integer.parseInt(currentPageStr);
}else{
currentPage = 1;
}
int pageSize = 0;//每页显示条数,如果不传递,默认每页显示5条记录
if(pageSizeStr != null && pageSizeStr.length() > 0){
pageSize = Integer.parseInt(pageSizeStr);
}else{
pageSize = 5;
}
//3. 调用service查询PageBean对象
PageBean<Route> pb = routeService.pageQuery(cid, currentPage, pageSize,rname);
//4. 将pageBean对象序列化为json,返回
writeValue(pb,response);
}
}
- RouteService.java
package cn.itcast.travel.service;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
/**
* 线路Service
*/
public interface RouteService {
/**
* 根据类别进行分页查询
* @param cid
* @param currentPage
* @param pageSize
* @param rname
* @return
*/
public PageBean<Route> pageQuery(int cid,int currentPage,int pageSize,String rname);
}
- RouteServiceImpl.java
package cn.itcast.travel.service.impl;
import cn.itcast.travel.dao.RouteDao;
import cn.itcast.travel.dao.impl.RouteDaoImpl;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.service.RouteService;
import java.util.List;
public class RouteServiceImpl implements RouteService {
private RouteDao routeDao = new RouteDaoImpl();
/**
* 根据类别进行分页查询
* @param cid
* @param currentPage
* @param pageSize
* @param rname
* @return
*/
@Override
public PageBean<Route> pageQuery(int cid, int currentPage, int pageSize,String rname) {
//封装PageBean
PageBean<Route> pb = new PageBean<Route>();
//设置当前页码
pb.setCurrentPage(currentPage);
//设置每页显示条数
pb.setPageSize(pageSize);
//设置总记录数
int totalCount = routeDao.findTotalCount(cid,rname);
pb.setTotalCount(totalCount);
//设置当前页显示的数据集合
int start = (currentPage - 1) * pageSize;//开始的记录数
List<Route> list = routeDao.findByPage(cid,start,pageSize,rname);
pb.setList(list);
//设置总页数 = 总记录数/每页显示条数
int totalPage = totalCount % pageSize == 0 ? totalCount / pageSize :(totalCount / pageSize) + 1 ;
pb.setTotalPage(totalPage);
return pb;
}
}
- RouteDao.java
package cn.itcast.travel.dao;
import cn.itcast.travel.domain.Route;
import java.util.List;
public interface RouteDao {
/**
* 根据cid查询总记录数
*/
public int findTotalCount(int cid,String rname);
/**
* 根据cid,start,pageSize,搜索框内容查询当前页的数据集合
*/
public List<Route> findByPage(int cid, int start, int pageSize,String rname);
}
- RouteDaoImpl.java
package cn.itcast.travel.dao.impl;
import cn.itcast.travel.dao.RouteDao;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.ArrayList;
import java.util.List;
public class RouteDaoImpl implements RouteDao {
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
/**
* 根据cid查询总记录数
* @param cid
* @param rname
* @return
*/
@Override
public int findTotalCount(int cid,String rname) {
//String sql = "select count(*) from tab_route where cid = ?";
//1.定义sql模板
String sql = "select count(*) from tab_route where 1=1 ";
StringBuilder sb = new StringBuilder(sql);
List params = new ArrayList();//条件们
//2.判断参数是否有值
if(cid != 0){
sb.append( " and cid = ? ");
params.add(cid);//添加?对应的值
}
if(rname != null && rname.length() > 0){
sb.append(" and rname like ? ");
params.add("%"+rname+"%");
}
sql = sb.toString();
return template.queryForObject(sql,Integer.class,params.toArray());
}
/**
* 根据cid,start,pageSize查询当前页的数据集合
* @param cid
* @param start
* @param pageSize
* @param rname
* @return
*/
@Override
public List<Route> findByPage(int cid, int start, int pageSize,String rname) {
//String sql = "select * from tab_route where cid = ? and rname like ? limit ? , ?";
String sql = " select * from tab_route where 1 = 1 ";
//1.定义sql模板
StringBuilder sb = new StringBuilder(sql);
List params = new ArrayList();//条件们
//2.判断参数是否有值
if(cid != 0){
sb.append( " and cid = ? ");
params.add(cid);//添加?对应的值
}
if(rname != null && rname.length() > 0){
sb.append(" and rname like ? ");
params.add("%"+rname+"%");
}
sb.append(" limit ? , ? ");//分页条件
sql = sb.toString();
params.add(start);
params.add(pageSize);
return template.query(sql,new BeanPropertyRowMapper<Route>(Route.class),params.toArray());
}
}
25.8.3 旅游线路查询_前台_修改分类数据展示代码
- route_list.html
<script>
$(function () {
/* var search = location.search;
//alert(search);//?id=5
// 切割字符串,拿到第二个值
var cid = search.split("=")[1];
*/
//获取cid的参数值
var cid = getParameter("cid");
//获取rname的参数值
var rname = getParameter("rname");
//判断rname如果不为null或者""
if(rname){
//url解码
rname = window.decodeURIComponent(rname);
}
//当页码加载完成后,调用load方法,发送ajax请求加载数据
load(cid,null,rname);
});
function load(cid ,currentPage,rname){
//发送ajax请求,请求route/pageQuery,传递cid
$.get("route/pageQuery",{
cid:cid,currentPage:currentPage,rname:rname},function (pb) {
//解析pagebean数据,展示到页面上
//1.分页工具条数据展示
//1.1 展示总页码和总记录数
$("#totalPage").html(pb.totalPage);
$("#totalCount").html(pb.totalCount);
var lis = "";
var fristPage = '<li οnclick="javascipt:load('+cid+',1,\''+rname+'\')"><a href="javascript:void(0)">首页</a></li>';
//计算上一页的页码
var beforeNum = pb.currentPage - 1;
if(beforeNum <= 0){
beforeNum = 1;
}
var beforePage = '<li οnclick="javascipt:load('+cid+','+beforeNum+',\''+rname+'\')" class="threeword"><a href="javascript:void(0)">上一页</a></li>';
lis += fristPage;
lis += beforePage;
//1.2 展示分页页码
/*
1.一共展示10个页码,能够达到前5后4的效果
2.如果前边不够5个,后边补齐10个
3.如果后边不足4个,前边补齐10个
*/
// 定义开始位置begin,结束位置 end
var begin; // 开始位置
var end ; // 结束位置
//1.要显示10个页码
if(pb.totalPage < 10){
//总页码不够10页
begin = 1;
end = pb.totalPage;
}else{
//总页码超过10页
begin = pb.currentPage - 5 ;
end = pb.currentPage + 4 ;
//2.如果前边不够5个,后边补齐10个
if(begin < 1){
begin = 1;
end = begin + 9;
}
//3.如果后边不足4个,前边补齐10个
if(end > pb.totalPage){
end = pb.totalPage;
begin = end - 9 ;
}
}
for (var i = begin; i <= end ; i++) {
var li;
//判断当前页码是否等于i
if(pb.currentPage == i){
li = '<li class="curPage" οnclick="javascipt:load('+cid+','+i+',\''+rname+'\')"><a href="javascript:void(0)">'+i+'</a></li>';
}else{
//创建页码的li
li = '<li οnclick="javascipt:load('+cid+','+i+',\''+rname+'\')"><a href="javascript:void(0)">'+i+'</a></li>';
}
//拼接字符串
lis += li;
}
var lastPage = '<li class="threeword"><a href="javascript:;">末页</a></li>';
var nextPage = '<li class="threeword"><a href="javascript:;">下一页</a></li>';
lis += nextPage;
lis += lastPage;
//将lis内容设置到 ul
$("#pageNum").html(lis);
//2.列表数据展示
var route_lis = "";
for (var i = 0; i < pb.list.length; i++) {
//获取{rid:1,rname:"xxx"}
var route = pb.list[i];
var li = '<li>\n' +
' <div class="img"><img src="'+route.rimage+'" style="width: 299px;"></div>\n' +
' <div class="text1">\n' +
' <p>'+route.rname+'</p>\n' +
' <br/>\n' +
' <p>'+route.routeIntroduce+'</p>\n' +
' </div>\n' +
' <div class="price">\n' +
' <p class="price_num">\n' +
' <span>¥</span>\n' +
' <span>'+route.price+'</span>\n' +
' <span>起</span>\n' +
' </p>\n' +
' <p><a href="route_detail.html">查看详情</a></p>\n' +
' </div>\n' +
' </li>';
route_lis += li;
}
$("#route").html(route_lis);
//定位到页面顶部
window.scrollTo(0,0);
});
}
</script>
25.9 旅游线路详情
25.9.1 旅游线路详情_分析
25.9.2 旅游线路详情_后台_Servlet 代码
/**
* 根据id查询一个旅游线路的详细信息
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void findOne(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.接收id
String rid = request.getParameter("rid");
//2.调用service查询route对象
Route route = routeService.findOne(rid);
//3.转为json写回客户端
writeValue(route,response);
}
25.9.3 旅游线路详情_后台_Service 代码
- RouteService.java
/**
* 根据id查询线路详情
* @param rid
* @return
*/
public Route findOne(String rid);
- RouteServiceImpl.java
/**
* 根据id查询线路详情
* @param rid
* @return
*/
@Override
public Route findOne(String rid) {
//1.根据id去route表中查询route对象
Route route = routeDao.findOne(Integer.parseInt(rid));
//2.根据route的id 查询图片集合信息
List<RouteImg> routeImgList = routeImgDao.findByRid(route.getRid());
//2.2将集合设置到route对象
route.setRouteImgList(routeImgList);
//3.根据route的sid(商家id)查询商家对象
Seller seller = sellerDao.findById(route.getSid());
route.setSeller(seller);
return route;
}
25.9.4 旅游线路详情_后台_Dao 代码
- RouteImgDao.java
package cn.itcast.travel.dao;
import cn.itcast.travel.domain.RouteImg;
import java.util.List;
public interface RouteImgDao {
/**
* 根据route的id查询图片
* @param rid
* @return
*/
public List<RouteImg> findByRid(int rid);
}
- RouteImgDaoImpl.java
package cn.itcast.travel.dao.impl;
import cn.itcast.travel.dao.RouteImgDao;
import cn.itcast.travel.domain.RouteImg;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.List;
public class RouteImgDaoImpl implements RouteImgDao {
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
@Override
public List<RouteImg> findByRid(int rid) {
String sql = "select * from tab_route_img where rid = ? ";
return template.query(sql,new BeanPropertyRowMapper<RouteImg>(RouteImg.class),rid);
}
}
- SellerDao.java
package cn.itcast.travel.dao;
import cn.itcast.travel.domain.Seller;
public interface SellerDao {
/**
* 根据id查询
* @param id
* @return
*/
public Seller findById(int id);
}
- SellerDaoImpl.java
package cn.itcast.travel.dao.impl;
import cn.itcast.travel.dao.SellerDao;
import cn.itcast.travel.domain.Seller;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
public class SellerDaoImpl implements SellerDao {
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
@Override
public Seller findById(int id) {
String sql = "select * from tab_seller where sid = ? ";
return template.queryForObject(sql,new BeanPropertyRowMapper<Seller>(Seller.class),id);
}
}
- RouteDao.java
/**
* 根据id查询
* @param rid
* @return
*/
public Route findOne(int rid);
- RouteDaoImpl.java
/**
* 根据id查询
* @param rid
* @return
*/
@Override
public Route findOne(int rid) {
String sql = "select * from tab_route where rid = ?";
return template.queryForObject(sql,new BeanPropertyRowMapper<Route>(Route.class),rid);
}
25.9.5 旅游线路详情_前台_ 代码
-
Route_detail.html中加载后:
- 1.获取rid;
- 2.发送ajax请求,获取route对象;
- 3.解析对象的数据。
-
route_detail.html
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<script>
$(function () {
//1.获取rid
var rid = getParameter("rid");
//2.发送请求请求 route/findOne
$.get("route/findOne",{
rid:rid},function (route) {
//3.解析数据填充html
$("#rname").html(route.rname);
$("#routeIntroduce").html(route.routeIntroduce);
$("#price").html("¥"+route.price);
$("#sname").html(route.seller.sname);
$("#consphone").html(route.seller.consphone);
$("#address").html(route.seller.address);
//图片展示
var ddstr = '<a class="up_img up_img_disable"></a>';
//遍历routeImgList
for (var i = 0; i < route.routeImgList.length; i++) {
var astr ;
if(i >= 4){
astr = '<a title="" class="little_img" data-bigpic="'+route.routeImgList[i].bigPic+'" style="display:none;">\n' +
' <img src="'+route.routeImgList[i].smallPic+'">\n' +
' </a>';
}else{
astr = '<a title="" class="little_img" data-bigpic="'+route.routeImgList[i].bigPic+'">\n' +
' <img src="'+route.routeImgList[i].smallPic+'">\n' +
' </a>';
}
ddstr += astr;
}
ddstr+='<a class="down_img down_img_disable" style="margin-bottom: 0;"></a>';
$("#dd").html(ddstr);
//图片展示和切换代码调用
goImg();
});
});
</script>
25.10 旅游线路收藏
25.10.1 旅游线路收藏_分析
- 当页面加载完成后,发送ajax请求,获取用户是否收藏的标记 根据标记,展示不同的按钮样式。
25.10.2 旅游线路收藏_判断是否收藏_Servlet
- RouteServlet.java
/**
* 判断当前登录用户是否收藏过该线路
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void isFavorite(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1. 获取线路id
String rid = request.getParameter("rid");
//2. 获取当前登录的用户 user
User user = (User) request.getSession().getAttribute("user");
int uid;//用户id
if(user == null){
//用户尚未登录
uid = 0;
}else{
//用户已经登录
uid = user.getUid();
}
//3. 调用FavoriteService查询是否收藏
boolean flag = favoriteService.isFavorite(rid, uid);
//4. 写回客户端
writeValue(flag,response);
}
25.10.3 旅游线路收藏_判断是否收藏_Service
- FavoriteService.java
package cn.itcast.travel.service;
public interface FavoriteService {
/**
* 判断是否收藏
* @param rid
* @param uid
* @return
*/
public boolean isFavorite(String rid, int uid);
}
package cn.itcast.travel.service.impl;
import cn.itcast.travel.dao.FavoriteDao;
import cn.itcast.travel.dao.impl.FavoriteDaoImpl;
import cn.itcast.travel.domain.Favorite;
import cn.itcast.travel.service.FavoriteService;
public class FavoriteServiceImpl implements FavoriteService {
private FavoriteDao favoriteDao = new FavoriteDaoImpl();
/**
* 判断是否收藏
* @param rid
* @param uid
* @return
*/
@Override
public boolean isFavorite(String rid, int uid) {
Favorite favorite = favoriteDao.findByRidAndUid(Integer.parseInt(rid), uid);
return favorite != null;//如果对象有值,则为true,反之,则为false
}
}
25.10.4 旅游线路收藏_判断是否收藏_Dao
- FavoriteDao.java
package cn.itcast.travel.dao;
import cn.itcast.travel.domain.Favorite;
public interface FavoriteDao {
/**
* 根据rid和uid查询收藏信息
* @param rid
* @param uid
* @return
*/
public Favorite findByRidAndUid(int rid, int uid);
}
package cn.itcast.travel.dao.impl;
import cn.itcast.travel.dao.FavoriteDao;
import cn.itcast.travel.domain.Favorite;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.Date;
public class FavoriteDaoImpl implements FavoriteDao {
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
/**
* 根据rid和uid查询收藏信息
* @param rid
* @param uid
* @return
*/
@Override
public Favorite findByRidAndUid(int rid, int uid) {
Favorite favorite = null;
try {
String sql = " select * from tab_favorite where rid = ? and uid = ?";
favorite = template.queryForObject(sql, new BeanPropertyRowMapper<Favorite>(Favorite.class), rid, uid);
} catch (DataAccessException e) {
e.printStackTrace();
}
return favorite;
}
}
25.10.5 旅游线路收藏_判断是否收藏_前台
- route_detail.html
<script>
$(function () {
// 发送请求,判断用户是否收藏过该线路
var rid = getParameter("rid");
$.get("route/isFavorite",{
rid:rid},function (flag) {
if(flag){
// 用户已经收藏过
//<a class="btn already" disabled="disabled">
//设置收藏按钮的样式
$("#favorite").addClass("already");
$("#favorite").attr("disabled","disabled");
}else{
// 用户没有收藏
}
});
});
</script>
25.10.6 旅游线路收藏_旅游线路收藏次数
- RouteServlet.java
@Override
public Route findOne(String rid) {
//1.根据id去route表中查询route对象
Route route = routeDao.findOne(Integer.parseInt(rid));
//2.根据route的id 查询图片集合信息
List<RouteImg> routeImgList = routeImgDao.findByRid(route.getRid());
//2.2将集合设置到route对象
route.setRouteImgList(routeImgList);
//3.根据route的sid(商家id)查询商家对象
Seller seller = sellerDao.findById(route.getSid());
route.setSeller(seller);
//4. 查询收藏次数
int count = favoriteDao.findCountByRid(route.getRid());
route.setCount(count);
return route;
}
- FavoriteDao.java
/**
* 根据rid 查询收藏次数
* @param rid
* @return
*/
public int findCountByRid(int rid);
- FavoriteDaoImpl.java
/**
* 根据rid 查询收藏次数
* @param rid
* @return
*/
@Override
public int findCountByRid(int rid) {
String sql = "SELECT COUNT(*) FROM tab_favorite WHERE rid = ?";
return template.queryForObject(sql,Integer.class,rid);
}
25.10.7 旅游线路收藏_点击按钮收藏_分析
25.10.8 旅游线路收藏_点击按钮收藏_Servlet
- RouteServlet.java
/**
* 添加收藏
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
public void addFavorite(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1. 获取线路rid
String rid = request.getParameter("rid");
//2. 获取当前登录的用户
User user = (User) request.getSession().getAttribute("user");
int uid;//用户id
if(user == null){
//用户尚未登录
return ;
}else{
//用户已经登录
uid = user.getUid();
}
//3. 调用service添加
favoriteService.add(rid,uid);
}
25.10.9 旅游线路收藏_点击按钮收藏_Service
- FavoriteService.java
/**
* 添加收藏
* @param rid
* @param uid
*/
void add(String rid, int uid);
- FavoriteServiceImpl.java
/**
* 添加收藏
* @param rid
* @param uid
*/
@Override
public void add(String rid, int uid) {
favoriteDao.add(Integer.parseInt(rid),uid);
}
25.10.10 旅游线路收藏_点击按钮收藏_Dao
- FavoriteDao.java
/**
* 添加收藏
* @param i
* @param uid
*/
void add(int i, int uid);
- FavoriteDaoImpl.java
/**
* 添加收藏
* @param rid
* @param uid
*/
@Override
public void add(int rid, int uid) {
String sql = "insert into tab_favorite values(?,?,?)";
template.update(sql,rid,new Date(),uid);
}
25.10.11 旅游线路收藏_点击按钮收藏_前台
- route_list.html
<script>
//点击收藏按钮触发的方法
function addFavorite(){
var rid = getParameter("rid");
//1. 判断用户是否登录
$.get("user/findOne",{
},function (user) {
if(user){
//用户登录了
//添加功能
$.get("route/addFavorite",{
rid:rid},function () {
//代码刷新页面
location.reload();
});
}else{
//用户没有登录
alert("您尚未登录,请登录");
location.href="http://localhost/travel/login.html";
}
})
}
</script>