前期准备:
SpringBoot+Thymeleaf+MyBastis+MySQL
目录结构如下:
一、基本配置
①pom.xml配置,使用到的依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.tx</groupId>
<artifactId>zhongxun</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>test</name>
<description>Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- servlet依赖. -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- tomcat的支持.-->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<!-- pageHelper 用于分页 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>4.1.6</version>
</dependency>
<!--引入JQuery库-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.4.1</version>
</dependency>
<!--Jpa依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
②application.properties文件配置
server.port=8081
#thymeleaf 配置
spring.thymeleaf.mode=HTML5
spring.thymeleaf.encoding=UTF-8
spring.thymeleaf.servlet.content-type=text/html
#缓存设置为false, 这样修改之后马上生效,便于调试
spring.thymeleaf.cache=false
#数据库配置
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/studentwelcome?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123456
# 非Mysql8.0请改为com.mysql.jdbc.Driver
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
mybatis.mapper-locations=classpath:mapper/*.xml
二、实现代码:
①实体类
pojo包下Users.java:
package com.example.demo.pojo;
public class Users {
private int id;
private String mobName;
private String userName;
private String nickname;
private String phone;
private byte register;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getMobName() {
return mobName;
}
public void setMobName(String mobName) {
this.mobName = mobName;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public byte getRegister() {
return register;
}
public void setRegister(byte register) {
this.register = register;
}
@Override
public String toString() {
return "Users{" +
"id=" + id +
", mobName='" + mobName + '\'' +
", userName='" + userName + '\'' +
", nickname='" + nickname + '\'' +
", phone='" + phone + '\'' +
", register=" + register +
'}';
}
}
②映射mapper
在mapper包下,UsersMapper:
package com.example.demo.mapper;
import com.example.demo.pojo.Users;
import org.apache.ibatis.annotations.*;
import java.util.List;
@Mapper
public interface UsersMapper {
//查询,只要含有要查询的字符,就获取该字段。
@Select("select * from users where CONCAT(mobName,userName,nickname,phone) " +
"like CONCAT('%',#{name},'%')")
public List<Users> getUsersList(String name);
//插入新记录,(未设置id,MYSQl已设置id自动+1)
@Insert("insert into users (mobName,userName,nickname,phone,register) " +
"values (#{mobName},#{userName},#{nickname},#{phone},#{register})")
public int add(Users users);
//删除记录
@Delete(" delete from users where id= #{id} ")
public void del(int id);
//选择记录
@Select("select * from users where id= #{id} ")
public Users getUser(int id);
//更新记录
@Update("update users set " +
"mobName = #{mobName}," +
"userName = #{userName}," +
"nickname = #{nickname}," +
"phone = #{phone}," +
"register = #{register} " +
"where id=#{id} ")
public int update(Users users);
}
③控制器
controller包下UsersController
package com.example.demo.controller;
import com.example.demo.mapper.UsersMapper;
import com.example.demo.pojo.Users;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import javax.annotation.Resource;
import java.util.List;
@Controller
public class UsersController {
@Resource
private UsersMapper usersMapper;
//添加页面
@RequestMapping("add")
public String add() {
return "add";
}
//查找(用于查询)
@RequestMapping("getUser")
public String getUser(int id, Model model) throws Exception {
Users Users = usersMapper.getUser(id);//把查到的记录添加进去
model.addAttribute("Users", Users);
return "getUser";
}
//添加
@RequestMapping("addUser")
public String listUser(Users users, BindingResult bindingResult) throws Exception {
boolean flag = usersMapper.add(users) > 0;
return "redirect:listUser";
}
//删除
@RequestMapping("deleteUser")
public String deleteUser(Users users) throws Exception {
usersMapper.del(users.getId());
return "redirect:listUser";
}
//修改
@RequestMapping("updateUser")
public String updateUser(Users Users) throws Exception {
boolean flag = usersMapper.update(Users) > 0;
return "redirect:listUser";
}
//查找(用于修改)
@RequestMapping("findUser")
public String findUser(int id, Model model) throws Exception {
Users Users = usersMapper.getUser(id);
model.addAttribute("Users", Users);
return "modify";
}
//遍历,分页
@RequestMapping({"/","listUser"})
public String listUser(@RequestParam(value = "name",defaultValue = "") String name,
Model model, @RequestParam(value = "start", defaultValue = "1") int start,
@RequestParam(value = "size", defaultValue = "5") int size) throws Exception {
PageHelper.startPage(start, size, "id asc");
List<Users> userList = usersMapper.getUsersList(name);
PageInfo<Users> page = new PageInfo<>(userList);
model.addAttribute("pages", page);
model.addAttribute("name", name);
return "listUser";
}
}
④分页
tools包下PageHelperConfig:
package com.example.demo.tools;
import com.github.pagehelper.PageHelper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.Properties;
@Configuration
public class PageHelperConfig {
@Bean
public PageHelper pageHelper() {
PageHelper pageHelper = new PageHelper();
Properties properties = new Properties();
properties.setProperty("offsetAsPageNum", "true");
properties.setProperty("rowBoundsWithCount", "true");
properties.setProperty("reasonable", "true");
pageHelper.setProperties(properties);
return pageHelper;
}
}
三、写完了后端后,实现前端
由于代码过多,可下载查看: