1.新建项目hellospring
2.new index.jsp
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
This is my JSP page!
没注册的用户,请<a href="index/qingqiuregister">注册</a>!
<br>
已注册的用户,请<a href="index/qingqiulogin">登录</a>!
</body>
</html>
3.引入jar包
4.配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>hellospring</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!--部署DispatcherServlet-->
<!-- //servlet 一级,二级 -->
<servlet>
<!-- //找第二个配置文件 springmvc-servlet.xml-->
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
5.配置springmvc-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- ch2哪个请求交给哪个类的哪个函数 -->
<context:component-scan base-package="controller"/>
<!-- 视图解析 -->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
6.编写控制类IndexController
package controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping(value="/index")
public class IndexController {
//功能点:主注册、登录、增删查改
@RequestMapping(value="/qingqiulogin")
public String login(HttpSession session,HttpServletRequest request) {
//打开登录页
session.setAttribute("key1", "请登录");
request.setAttribute("key2", "促销活动");
return "login";
}
@RequestMapping(value="/qingqiuregister")
public String register(Model model){
model.addAttribute("keym","注册的提示信息");
//打开登录页
return "register";
}
}
7.写UserController
package controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping(value="/user")
public class UserController {
//p24
@RequestMapping(value="/regsubmit")
// public String register(User user,Model model){
// if("liuxin".equals(user.getUsername()) &&"123456".equals(user.getPassword())) {
public String register(String username,String password,Model model) {
if(username!="" &&password!=""){
model.addAttribute("username",username);
System.out.println("User_Controller.register() success");
return "login";//注册成功,登录
}
else {
// model.addAttribute("username",user.getUsername());//失败,回退
model.addAttribute("username",username);//失败,回退
System.out.println("User_Controller.register() fail");
return "register";
}
}
}
8.register.jsp
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<form action="user/regsubmit" method="post">
这是注册表单页面
<br><br>
<h1>ch1</h1>
username:<input type="text" name="username"><br><br>
password:<input type="password" name="password"><br><br>
passwordAgain:<input type="password" name="password02"><br><br>
<br>
<input type="submit" value="注册">
</form>
<br>
<h1>ch2</h1>
EL表达式
<%=request.getAttribute("keym") %><br>
-------
name:
<%=request.getAttribute("username") %>
</body>
</html>
运行截图