SpringBoot整合Mybatis,实现简单的增删改查

这是最终的文件目录结构：

新建maven工程

1,配置pom.xml

>
    >org.springframework.boot>
    >spring-boot-starter-parent>
    >2.1.5.RELEASE>
>

>
    >
        >org.springframework.boot>
        >spring-boot-atarter-web>
    >

    >
        >org.mybatis.spring.boot>
        >mybatis-spring-boot-starter>
        >1.3.1>
    >

    >
        >mysql>
        >mysql-connector-java>
        >8.0.15>
    >
    >
        >org.projectlomok>
        >lombok>
    >
>

2,创建数据表

create table studentMB(
   id int primary key auto_increment,
   name varchar(11),
   score double,
   birthday date,
  );

3,创建对应的实体类

package com.shuang.entity;

import lombok.Data;

import java.util.Date;

@Data
public class Student {
    private Long id;
    private String name;
    private Double score;
    private Date birthday;
}

4、创建StudentRepository

package com.shuang.repository;

import com.shuang.entity.Student;

import java.util.List;

public interface StudentRepository {
    public List<Student> findAll();
    public Student findById(Long id);
    public void save(Student student);
    public void update(Student student);
    public void deleteById(Long id);
}

5,在resources/mapping路径下创建StudentRepository对应的Mapper.xml

<?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">

<!-- namespace:该mapper.xml映射文件的唯一标识 -->
>
    >
        select * from student;
    >

    >
        select * from student where id=#{id};
    >

    >
        insert into student(name,score,birthday) values(#{name},#{score},#{birthday});
    >

    >
        update student set name=#{name},score=#{score},birthday=#{birthday} where id=#{id};
    >

    >
        delete from student where id=#{id};
    >
>

6,创建StudentHandler,注入StudentRepository

package com.shuang.controller;

import com.shuang.entity.Student;
import com.shuang.repository.StudentRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
public class StudentHandler {
    @Autowired
    private StudentRepository studentRepository;

    @GetMapping("/findAll")
    public List<Student> findAll(){
        return studentRepository.findAll();
    }
    @PostMapping("/findById/{id}")
    public void save(@RequestBody Student student){
        studentRepository.save(student);
    }
    @PutMapping("/update")
    public void update(@RequestBody Student student){
        studentRepository.update(student);
    }
    @DeleteMapping("/deleteById/{id}")
    public void deleteById(@PathVariable("id") Long id){
        studentRepository.deleteById(id);
    }

7，application.yml

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
    &serverTimezone=GMT
    username: shuang
    password: mysql215311?
    driver-class-name: com.mysql.cj.jdbc.Driver
mybatis:
  mapper-locations: classpath:/mapping/*.xml
  type-aliases-package: com.shuang.entity
  

8,创建Application

package com.shuang;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.shuang.repository")
public class Application {
    public static void main(String [] args){
        SpringApplication.run(Application.class,args);
    }
}

启动：使用端口就可以访问了