MybatisPlus-删除

目录

1.数据库建表 

2.项目 ---就是更新del_flag字段为2

(1)pom.xml

(2)Application

(3)applicatiom.yml

(4)entity

(5)mapper

(6)service

(7)service目录下的impl目录

 (8)common

(9)enums

(10)config

(11)controller

postman测试

3.彻底删除数据库记录

(11）controller

postman

---

1.数据库建表 

CREATE TABLE `sys_user` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键',
  `create_time` datetime DEFAULT NULL COMMENT '创建时间',
  `update_time` datetime DEFAULT NULL COMMENT '修改时间',
  `del_flag` tinyint(1) DEFAULT '1' COMMENT '删除状态：1正常/2删除',
  `user_id` varchar(255) DEFAULT NULL COMMENT '用户id',
  `user_name` varchar(255) DEFAULT NULL COMMENT '用户名称',
  PRIMARY KEY (`id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=14 DEFAULT CHARSET=utf8mb4 ROW_FORMAT=DYNAMIC COMMENT='用户信息';

2.项目 ---就是更新del_flag字段为2

(1)pom.xml

    4.0.0
    
    
        org.springframework.boot
        spring-boot-starter-parent
        2.3.5.RELEASE
    


    org.example
    mybatisplus1
    1.0-SNAPSHOT

    
        8
        8
        UTF-8

        
        1.18.16
        3.4.1
        1.1.23
    

    

        

        
        
            org.springframework.boot
            spring-boot-starter
        

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

        
        
            org.springframework.boot
            spring-boot-starter-web
            compile
        

        
        
            org.projectlombok
            lombok
            ${lombok.version}
        

        
        
            mysql
            mysql-connector-java
            runtime
        

        
        
            com.alibaba
            druid-spring-boot-starter
            ${druid.version}
        

        
        
            com.baomidou
            mybatis-plus-boot-starter
            ${mybatis-plus.version}
        




    


    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
                
                    
                    com.lpc.Application
                    ZIP
                    true
                
                
                    
                        
                            repackage
                        
                    
                
            
        
    

(2)Application

package com.lpc;

import lombok.extern.slf4j.Slf4j;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @Author lpc
 * @Date 2024 01 11 11 38
 **/
@SpringBootApplication
@Slf4j
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class,args);
        log.info("项目启动成功......");
    }
}

(3)applicatiom.yml

server:
  port: 8888
spring:
  #连接数据库
  datasource:
    druid:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/mybatisplus_db?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
    username: root
    password: lpc123456
mybatis-plus:
  configuration:
    #在映射实体或者属性时，将数据库中表名和字段名中的下划线去掉，按照驼峰命名法映射
    map-underscore-to-camel-case: true
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  global-config:
    db-config:
      id-type: ASSIGN_ID

(4)entity

package com.lpc.entity;

import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;
import lombok.EqualsAndHashCode;
import org.springframework.format.annotation.DateTimeFormat;
import java.io.Serializable;
import java.util.Date;


/**
 * @Author lpc
 * @Date 2024 01 11 14 08
 **/
@Data
@EqualsAndHashCode(callSuper = false)
public class SysUser implements Serializable {


    /**
     * 主键
     */
    @TableId(value = "id", type = IdType.AUTO)
    private Integer id;

    /**
     * 创建时间
     */
    @JsonFormat(timezone = "GMT+8",pattern = "yyyy-MM-dd HH:mm:ss")
    @DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
    @TableField(fill = FieldFill.INSERT)
    private Date createTime;

    /**
     * 更新时间
     */
    @JsonFormat(timezone = "GMT+8",pattern = "yyyy-MM-dd HH:mm:ss")
    @DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date updateTime;

    /**
     * 删除状态默认1正常/2删除
     */
    private Integer delFlag;

    /**
     * 用户id
     */
    private String userId;

    /**
     * 用户名称
     */
    private String userName;

}

(5)mapper

package com.lpc.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.lpc.entity.SysUser;
import org.apache.ibatis.annotations.Mapper;

/**
 * @Author lpc
 * @Date 2024 01 11 14 19
 **/
@Mapper
public interface SysUserMapper extends BaseMapper {
}

(6)service

package com.lpc.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.lpc.entity.SysUser;

/**
 * @Author lpc
 * @Date 2024 01 11 14 20
 **/
public interface SysUserService extends IService {
}

(7)service目录下的impl目录

package com.lpc.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lpc.entity.SysUser;
import com.lpc.mapper.SysUserMapper;
import com.lpc.service.SysUserService;
import org.springframework.stereotype.Service;

/**
 * @Author lpc
 * @Date 2024 01 11 14 21
 **/
@Service
public class SysUserServiceImpl extends ServiceImpl implements SysUserService {
}

 (8)common

package com.lpc.common;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.lpc.enums.CodeEnum;
import lombok.Data;

import java.io.Serializable;

/**
 *  接口返回数据格式
 * @author scott
 */
@Data
public class Result implements Serializable {

	private static final long serialVersionUID = 1L;

	/**
	 * 成功标志
	 */
	private boolean success = true;

	/**
	 * 返回处理消息
	 */
	private String message = "操作成功！";

	/**
	 * 返回代码
	 */
	private Integer code = 0;

	/**
	 * 返回数据对象 data
	 */
	private T result;

	//返回数据
	private T data;
	/**
	 * 时间戳
	 */
	private long timestamp = System.currentTimeMillis();

	public Result(Integer code, String message, T result) {
		this.code=code;
		this.message=message;
		this.result=result;
	}
	public Result() {

	}

	public Result success(String message) {
		this.message = message;
		this.code = CodeEnum.SUCCESS.getCode();
		this.success = true;
		return this;
	}

	@Deprecated
	public static Result