java整合mybatis,springboot与mybatis整合实例详解(完美融合)

Java整合MyBatis和SpringBoot是现在Web应用开发中非常常见的一种方式，这种方式可以快速的搭建出一个基本的Web应用框架，同时也可以很方便的进行数据库操作。下面我们来详细的介绍一下Java整合MyBatis和SpringBoot的具体实现。

一、搭建SpringBoot项目

1.1 创建项目

在Eclipse或者IntelliJ IDEA中创建一个SpringBoot项目，选择maven方式，选择Web、MySQL、MyBatis等相关依赖。

1.2 配置文件

在src/main/resources目录下创建application.properties文件，添加如下配置：

# 数据库连接配置
spring.datasource.url=jdbc:mysql://localhost:3306/test?useSSL=false&useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
# MyBatis配置
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.type-aliases-package=com.example.demo.entity

二、创建实体类

创建一个实体类，比如User.java，代码如下：

package com.example.demo.entity;

public class User {

    private Integer id;
    private String username;
    private String password;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}

三、创建Mapper接口

创建一个Mapper接口，比如UserMapper.java，代码如下：

package com.example.demo.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;

import com.example.demo.entity.User;

@Mapper
public interface UserMapper {

    List<User> findAll();

    User findById(Integer id);

    void insert(User user);

    void update(User user);

    void delete(Integer id);

}

四、创建Mapper.xml文件

在src/main/resources/mapper目录下创建UserMapper.xml文件，代码如下：

<?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.example.demo.mapper.UserMapper">
    <resultMap id="BaseResultMap" type="com.example.demo.entity.User">
        <id column="id" property="id" />
        <result column="username" property="username" />
        <result column="password" property="password" />
    </resultMap>

    <select id="findAll" resultMap="BaseResultMap">
        SELECT * FROM user
    </select>

    <select id="findById" parameterType="java.lang.Integer" resultMap="BaseResultMap">
        SELECT * FROM user WHERE id = #{id}
    </select>

    <insert id="insert" parameterType="com.example.demo.entity.User">
        INSERT INTO user (username, password) VALUES (#{username}, #{password})
    </insert>

    <update id="update" parameterType="com.example.demo.entity.User">
        UPDATE user SET username = #{username}, password = #{password} WHERE id = #{id}
    </update>

    <delete id="delete" parameterType="java.lang.Integer">
        DELETE FROM user WHERE id = #{id}
    </delete>

</mapper>

五、创建Service

创建一个Service，比如UserService.java，代码如下：

package com.example.demo.service;

import java.util.List;

import com.example.demo.entity.User;

public interface UserService {

    List<User> findAll();

    User findById(Integer id);

    void save(User user);

    void update(User user);

    void delete(Integer id);

}

创建一个ServiceImpl，比如UserServiceImpl.java，代码如下：

package com.example.demo.service.impl;

import java.util.List;

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

import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;
import com.example.demo.service.UserService;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

    @Override
    public List<User> findAll() {
        return userMapper.findAll();
    }

    @Override
    public User findById(Integer id) {
        return userMapper.findById(id);
    }

    @Override
    public void save(User user) {
        userMapper.insert(user);
    }

    @Override
    public void update(User user) {
        userMapper.update(user);
    }

    @Override
    public void delete(Integer id) {
        userMapper.delete(id);
    }

}

六、创建Controller

创建一个Controller，比如UserController.java，代码如下：

package com.example.demo.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.example.demo.entity.User;
import com.example.demo.service.UserService;

@RestController
@RequestMapping("/users")
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public List<User> findAll() {
        return userService.findAll();
    }

    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    public User findById(@PathVariable Integer id) {
        return userService.findById(id);
    }

    @RequestMapping(value = "/", method = RequestMethod.POST)
    public void save(@RequestBody User user) {
        userService.save(user);
    }

    @RequestMapping(value = "/", method = RequestMethod.PUT)
    public void update(@RequestBody User user) {
        userService.update(user);
    }

    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
    public void delete(@PathVariable Integer id) {
        userService.delete(id);
    }

}

七、启动项目

在Eclipse或者IntelliJ IDEA中启动SpringBoot项目，启动成功后就可以通过http://localhost:8080/users/访问到我们创建的接口了。

以上就是Java整合MyBatis和SpringBoot的具体实现，希望对大家有所帮助。