使用全注解的方式实现SpringBoot,MyBatis,MySQL的整合
1.新建User表

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2.pom.xml依赖配置

        <!-- MyBatis的依赖-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.1</version>
        </dependency>
        <!-- MySQL的依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

3.application.properties中添加MySQL配置

spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

4.User类

package com.capgemin.springboot12.pojo;

public class User {
    private Integer id;
    private String name;

    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;
    }
}

5.DAO层

package com.capgemin.springboot12.mapper;

import com.capgemin.springboot12.pojo.User;
import org.apache.ibatis.annotations.*;
import org.springframework.stereotype.Component;

import java.util.List;

@Mapper
@Component
public interface UserMapper {
    /**
     * 添加操作
     */
    @Insert("insert into user(id,name) values(#{id},#{name})")
    void insert(User user);

    /**
     * 删除操作
     */
    @Delete("delete from user where id = #{id}")
    Long delete(@Param("id") Integer id);

    /**
     * 更新操作
     */
    @Update("update user set name=#{name},id = #{id}")
    Long update(User user);

    /**
     * 查询所有
     */
    @Select("select * from user")
    List<User> selectAll();

    /**
     * 根据id查询
     */
    @Select("select * from user where id = #{id}")
    User selectById(@Param("id") Integer id);
}

6.Controller层

package com.capgemin.springboot12.controller;

import com.capgemin.springboot12.mapper.UserMapper;
import com.capgemin.springboot12.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@RequestMapping("user")
public class UserController {
    @Autowired
    private UserMapper userMapper;

    @RequestMapping("/selectAll")
    public List<User> selectAll(){
        return userMapper.selectAll();
    }
}

这里只写了一个selectAll()方法。
7.测试
启动项目，在浏览器地址栏输入：http://localhost:8080/user/selectAll

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