Spring Boot系列教程七：Spring boot集成MyBatis

Posted 2020-10-03 向前爬的蜗牛

一.创建项目

        项目名称为 “springboot_mybatis_demo”，创建过程中勾选 “Web”，“MyBatis”，“mysql”，第一次创建Maven需要下载依赖包(耐心等待)

       

二.实现

2.1创建User类

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

2.2创建UserMapper接口

      创建接口UserMapper，并添加@Mapper注解

 1 package com.woniu.mapper;
 2 
 3 import org.apache.ibatis.annotations.Mapper;
 4 import org.apache.ibatis.annotations.Select;
 5 
 6 import com.woniu.bean.User;
 7 
 8 @Mapper
 9 public interface UserMaper {
10     
11     @Select("select * from user where age = #{age}")
12     User Select(int age);
13 }

2.3创建controller

 1 package com.woniu.controller;
 2 
 3 import org.springframework.beans.factory.annotation.Autowired;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.bind.annotation.RestController;
 6 
 7 import com.woniu.bean.User;
 8 import com.woniu.mapper.UserMaper;
 9 
10 @RestController
11 @RequestMapping("/web")
12 public class WebController {
13     @Autowired
14     private UserMaper mapper;
15     
16     
17     @RequestMapping("/index")
18     public User selectAge(int age){
19         
20         return mapper.Select(age);
21     }
22 }

2.4设置application.properties

1 # mysql
2 spring.datasource.url=jdbc:mysql://localhost/spring_boot_demo?useUnicode=true&characterEncoding=utf-8
3 spring.datasource.username=root
4 spring.datasource.password=123456
5 spring.datasource.driver-class-name=com.mysql.jdbc.Driver

2.5MySQL中创建对应数据库和表

      数据库名："spring_boot_demo"，表名："user"

 

三.测试

运行项目测试结果如下：