SpringBoot整合Mybatis

1、依赖在上一篇随笔中已经导入，这里不再展示

2、数据源信息也上一篇随笔中已经配置过

3、编写pojo对象MUser

 1 package com.offcn.pojo;
 2 
 3 import lombok.AllArgsConstructor;
 4 import lombok.Data;
 5 import lombok.NoArgsConstructor;
 6 
 7 import javax.persistence.*;
 8 
 9 @Entity
10 @Data
11 @NoArgsConstructor
12 @AllArgsConstructor
13 @Table(name = "user")
14 public class MUser {
15 
16    @Id
17    @GeneratedValue(strategy = GenerationType.IDENTITY)
18    private Integer uid;
19    private String uname;
20    private String pwd;
21    private String gender;
22    private String phone;
23 }

4、MUserMapper接口

1 package com.offcn.mapper;
2 
3 import com.offcn.pojo.MUser;
4 
5 import java.util.List;
6 
7 public interface MUserMapper {
8    List<MUser> getUserList();
9 }

5、MUserMapper.xml映射文件

1 <?xml version="1.0" encoding="UTF-8" ?>
2 <!DOCTYPE mapper
3         PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
4         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
5 <mapper namespace="com.offcn.mapper.MUserMapper">
6     <select id="getUserList" resultType="com.offcn.pojo.MUser">
7     select * from user
8   </select>
9 </mapper>

6、在主启动类上配置扫描mybatis的包

 1 package com.offcn;
 2 
 3 import org.mybatis.spring.annotation.MapperScan;
 4 import org.springframework.boot.SpringApplication;
 5 import org.springframework.boot.autoconfigure.SpringBootApplication;
 6 
 7 /**
 8  * @author yy
 9  * @date 2019/11/5 9:56
10  */
11 @MapperScan("com.offcn.mapper")
12 @SpringBootApplication
13 public class HelloApplication {
14    public static void main(String[] args) {
15       SpringApplication.run(HelloApplication.class,args);
16    }
17 }

如果启动错误可以将映射文件放在resources文件目录下试试