Spring boot2.0??????Mybatis

Posted 2021-02-14

?????????setname   map   ??????   ??????   ??????   jdb   ??????   tor   user   

??????Mybatis?????????

??????MyBatis ?????????????????????????????????????????????????????? SQL????????????????????????????????????MyBatis ???????????????????????? JDBC ???????????????????????????????????????????????????MyBatis ????????????????????? XML ?????????????????????????????????????????????????????? Java ??? POJOs(Plain Old Java Objects,????????? Java??????)?????????????????????????????????

??????????????????

<!-- ??????mybatis?????? -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.3.2</version>
</dependency>

????????????

1 # mybatis
2 mybatis.mapper-locations=classpath:mappings/*.xml
3 mybatis.type-aliases-package=com.qiangu.model

• ??????mapper-locations???????????????src/main/resources
• ???  type-aliases-package????????????????????????Model???????????????????????????com.qiangu.model

??????xml??????-???????????????SQL??????

 1 package com.qiangu.model;
 2 
 3 public class User {
 4 
 5     private int id;
 6     private String name;
 7     private Integer age;
 8 
 9     public int getId() {
10         return id;
11     }
12 
13     public void setId(int id) {
14         this.id = id;
15     }
16 
17     public String getName() {
18         return name;
19     }
20 
21     public void setName(String name) {
22         this.name = name;
23     }
24 
25     public Integer getAge() {
26         return age;
27     }
28 
29     public void setAge(Integer age) {
30         this.age = age;
31     }
32 }

?????????com.qiangu.mapper????????????UserMapper???

1 @Mapper
2 @Repository
3 public interface UserMapper {
4 
5     //???????????????????????????
6     User findAllUser();   
7     
8 }

??????

Mybatis Mapper

<?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.qiangu.mapper.UserMapper">

??????<select id="findAllUser" resultType="com.qiangu.model.User">
    ??????select * from user
??????</select>

</mapper>