Springboot - Mybatis

Posted 2021-01-12 周无极

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Springboot-Mybatis

package com.bjsxt.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import com.bjsxt.pojo.Users;
import com.bjsxt.service.UsersService;

@Controller
@RequestMapping("/users")
public class UsersController {

    @Autowired
    private UsersService usersService;
    
    /**
     * 页面跳转
     */
    @RequestMapping("/{page}")
    public String showPage(@PathVariable String page){
        return page;
    }
    
    /**
     * 添加用户
     */
    @RequestMapping("/addUser")
    public String addUser(Users users){
        this.usersService.addUser(users);
        return "ok";
    }
    
    /**
     * 查询全部用户
     */
    @RequestMapping("/findUserAll")
    public String findUserAll(Model model){
        List<Users> list = this.usersService.findUserAll();
        model.addAttribute("list", list);
        return "showUsers";
    }
    
    /**
     * 根据用户id查询用户
     */
    @RequestMapping("/findUserById")
    public String findUserById(Integer id,Model model){
        Users user = this.usersService.findUserById(id);
        model.addAttribute("user", user);
        return "updateUser";
    }
    
    /**
     * 更新用户
     */
    @RequestMapping("/editUser")
    public String editUser(Users users){
        this.usersService.updateUser(users);
        return "ok";
    }
    
    /**
     * 删除用户
     */
    @RequestMapping("/delUser")
    public String delUser(Integer id){
        this.usersService.deleteUserById(id);
        return "redirect:/users/findUserAll";
    }
    
}

UsersController

package com.bjsxt.mapper;

import java.util.List;

import com.bjsxt.pojo.Users;

public interface UsersMapper {
    
    void insertUser(Users users);
    
    List<Users> selectUsersAll();
    
    Users selectUsersById(Integer id);
    
    void updateUser(Users users);
    
    void deleteUserById(Integer id);
}

UsersMapper

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.bjsxt.mapper.UsersMapper">
    <insert id="insertUser" parameterType="users">
        insert into users(name,age) values(#{name},#{age})
    </insert>
    
    <select id="selectUsersAll" resultType="users">
        select id,name,age from users
    </select>
    
    <select id="selectUsersById" resultType="users">
        select id,name,age from users where id = #{value}
    </select>
    
    <update id="updateUser" parameterType="users">
        update users set name=#{name} ,age=#{age} where id=#{id}
    </update>
    
    <delete id="deleteUserById">
        delete from users where id = #{value}
    </delete>
</mapper>

UsersMapper.xml

package com.bjsxt.pojo;

public class Users {
    private Integer id;
    private String name;
    private Integer  age;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    
}

Users

package com.bjsxt.service;

import java.util.List;

import com.bjsxt.pojo.Users;

public interface UsersService {
    
    void addUser(Users users);
    List<Users> findUserAll();
    Users findUserById(Integer id);
    void updateUser(Users users);
    void deleteUserById(Integer id);
}

UsersService

package com.bjsxt.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.bjsxt.mapper.UsersMapper;
import com.bjsxt.pojo.Users;
import com.bjsxt.service.UsersService;

@Service
@Transactional
public class UsersServiceImpl implements UsersService {
    
    @Autowired
    private UsersMapper usersMapper;
    
    @Override
    public void addUser(Users users) {
        this.usersMapper.insertUser(users);
    }

    @Override
    public List<Users> findUserAll() {
        return this.usersMapper.selectUsersAll();
    }

    @Override
    public Users findUserById(Integer id) {
        return this.usersMapper.selectUsersById(id);
    }

    @Override
    public void updateUser(Users users) {
        this.usersMapper.updateUser(users);
    }

    @Override
    public void deleteUserById(Integer id) {
        this.usersMapper.deleteUserById(id);
    }
}

UsersServiceImpl

package com.bjsxt;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.bjsxt.mapper") //@MapperScan 用户扫描MyBatis的Mapper接口
public class App {

    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

App

<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>1.5.10.RELEASE</version>
    </parent>
    <groupId>com.bjsxt</groupId>
    <artifactId>12-spring-boot-springmvc-mybatis</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.7</java.version>
        <thymeleaf.version>3.0.2.RELEASE</thymeleaf.version>
        <thymeleaf-layout-dialect.version>2.0.4</thymeleaf-layout-dialect.version>
    </properties>

    <dependencies>
        <!-- springBoot的启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- web启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <!-- Mybatis启动器 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- mysql数据库驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- druid数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.9</version>
        </dependency>
    </dependencies>
</project>

pom.xml

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>操作提示页面</title>
</head>
<body>
    操作成功！！！
</body>
</html>

ok.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>添加用户</title>
</head>
<body>
    <form th:action="@{/users/addUser}" method="post">
        用户姓名：<input type="text" name="name"/><br/>
        用户年龄：<input type="text" name="age"/><br/>
        <input type="submit" value="确定"/><br/>
    </form>
</body>
</html>

input.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>展示用户数据</title>
</head>
<body>
    <table border="1" style="width:500px;">
        <tr>
            <th>用户ID</th>
            <th>用户姓名</th>
            <th>用户年龄</th>
            <th>操作</th>
        </tr>
        <tr th:each="user : ${list}">
            <td th:text="${user.id}"></td>
            <td th:text="${user.name}"></td>
            <td th:text="${user.age}"></td>
            <td>
                <a th:href="@{/users/findUserById(id=${user.id})}">更新用户</a>
                <a th:href="@{/users/delUser(id=${user.id})}">删除用户</a>
            </td>
        </tr>
    </table>
</body>
</html>

showUsers.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form th:action="@{/users/editUser}" method="post">
            <input type="hidden" name="id" th:field="${user.id}"/>
            用户姓名：<input type="text" name="name" th:field="${user.name}"/><br/>
            用户年龄：<input type="text" name="age" th:field="${user.age}"/><br/>
            <input type="submit" value="确定"/><br/>
    </form>
</body>
</html>

updateUser.html

spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/orcl
spring.datasource.username=root
spring.datasource.password=123456

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

mybatis.type-aliases-package=com.bjsxt.pojo

application.properties

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