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：