SpringBoot整合Mybatis实现CRUD

<?xml version="1.0" encoding="UTF-8"?>

  4.0.0
  
    org.springframework.boot
    spring-boot-starter-parent
    2.1.7.RELEASE
     
  
  com.beilin
  SpringBoot-Mybatis
  0.0.1-SNAPSHOT
  SpringBoot-Mybatis
  Demo project for Spring Boot

  
    1.8
  
  
    
      org.springframework.boot
      spring-boot-starter-jdbc
    
    
      org.springframework.boot
      spring-boot-starter-web
    

    
    
      org.mybatis.spring.boot
      mybatis-spring-boot-starter
      2.1.0
    

    
    
      mysql
      mysql-connector-java
      5.1.47
    

    
      org.springframework.boot
      spring-boot-starter-test
      test
    
  

  
    
      
        org.springframework.boot
        spring-boot-maven-plugin
      
    
  


pom.xml

#配置mybatis

#配置xml映射路径
mybatis.mapper-locations=classpath:mapping/*.xml
#配置实体类别名
mybatis.type-aliases-package=com.beilin.entity
#开启驼峰命名法
mybatis.configuration.map-underscore-to-camel-case=true

#配置Mysql连接
spring.datasource.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

package com.beilin;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan(value = "com.beilin.mapper")
@SpringBootApplication
public class SpringbootApplication {
  public static void main(String[] args) {
    SpringApplication.run(SpringbootApplication.class, args);
  }
}
SpringbootApplication

package com.beilin.entity;

public class User {
  /**
   * name:学生实体
   */

  //主键id
  private int id;
  //姓名
  private String name;
  //年龄
  private int age;

  // Get和 Set方法
  public int getId() {
    return id;
  }

  public void setId(int 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;
  }
}

User.java

package com.beilin.mapper;
import com.beilin.entity.User;
import java.util.List;
public interface UserMapper {
   //插入
  public void insert(User user);
  //根据id删除
  public void delete(Integer id);
   //根据user的id修改
  public void update(User user);
  //根据id查询
  public User getById(Integer id);
  //查询全部
  public List list();
}
UserMapper.java

<?xml version="1.0" encoding="UTF-8"?>


  
  
  insert into user(name,age) values(#{name},#{age})
  
  
  
  delete from user where id=#{id}
  
  
  
  update user set name=#{name},age=#{age} where id=#{id}
  
  
  
  select * from user where id=#{id}
  
  
  
  select * from user
  

UserMapper.xml

package com.beilin.controller;
import com.beilin.entity.User;
import com.beilin.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController
public class UserController {
  @Autowired
  private UserMapper userMapper;
    //插入user
  @RequestMapping("/user")
  public void insert( User user) {
    userMapper.insert(user);
  }
   //根据id删除
  @RequestMapping("/user1/{id}")
  public void delete(@PathVariable("id") Integer id) {
    userMapper.delete(id);
  }
    //修改
  @RequestMapping("/user2/{id}")
  public void update(User user,@PathVariable("id") Integer id) {
    userMapper.update(user);
  }
   //根据id查询学生
  @RequestMapping("/user3/{id}")
  public User getById(@PathVariable("id") Integer id) {
    User user = userMapper.getById(id);
    return user;
  }
  //查询全部
  @RequestMapping("/users")
  public List list(){
    List users = userMapper.list();
    return users;
  }
}
UserController.java

      
        src/main/java
        
          **/*.xml
        
        true
      
 
resources