Spring Boot系列教程七：Spring boot集成MyBatis

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

 package com.woniu.bean;

 public class User {
     private long id;
     private String name;
     private int age;
     public long getId() {
         return id;
     }
     public void setId(long id) {
         this.id = id;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public int getAge() {
         return age;
     }
     public void setAge(int age) {
         this.age = age;
     }
     @Override
     public String toString() {
         return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
     }

 }

2.2创建UserMapper接口

      创建接口UserMapper，并添加@Mapper注解

 package com.woniu.mapper;

 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Select;

 import com.woniu.bean.User;

 @Mapper
 public interface UserMaper {

     @Select("select * from user where age = #{age}")
     User Select(int age);
 }

2.3创建controller

 package com.woniu.controller;

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

 import com.woniu.bean.User;
 import com.woniu.mapper.UserMaper;

 @RestController
 @RequestMapping("/web")
 public class WebController {
     @Autowired
     private UserMaper mapper;

     @RequestMapping("/index")
     public User selectAge(int age){

         return mapper.Select(age);
     }
 }

2.4设置application.properties

 # mysql
 spring.datasource.url=jdbc:mysql://localhost/spring_boot_demo?useUnicode=true&characterEncoding=utf-8
 spring.datasource.username=root
 spring.datasource.password=123456
 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：