springboot(16)-integrate MyBatis

1 Integrate MyBatis

Official document: http://mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/
Maven warehouse address: https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring -boot-starter/2.1.1
1 Create entity class

package com.zs.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Department {
    
    
    private Integer id;
    private String departmentName;
}

2 Create Mapper interface

package com.zs.mapper;

import com.zs.pojo.Department;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;

//@Mapper : 表示本类是一个 MyBatis 的 Mapper
@Mapper
@Repository
public interface DepartmentMapper {
    
    

    // 获取所有部门信息
    List<Department> getDepartments();

    // 通过id获得部门
    Department getDepartment(Integer id);

}

3 Create the corresponding Mapper mapping file

<?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.zs.mapper.DepartmentMapper">

    <select id="getDepartments" resultType="Department">
        select * from department;
    </select>

    <select id="getDepartment" resultType="Department" parameterType="int">
        select * from department where id = #{id};
    </select>

</mapper>

4 Write the DepartmentController of the department for testing

package com.zs.controller;

import com.zs.mapper.DepartmentMapper;
import com.zs.pojo.Department;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class DepartmentController {
    
    

    @Autowired
    DepartmentMapper departmentMapper;

    // 查询全部部门
    @GetMapping("/getDepartments")
    public List<Department> getDepartments(){
    
    
        return departmentMapper.getDepartments();
    }

    // 查询全部部门
    @GetMapping("/getDepartment/{id}")
    public Department getDepartment(@PathVariable("id") Integer id){
    
    
        return departmentMapper.getDepartment(id);
    }

}

5 springboot integrates mybatis
application.yaml

# 整合mybatis
mybatis:
  type-aliases-package: com.zs.pojo
  mapper-locations: classpath:mybatis/mapper/*.xml

6 Start project visit for testing