MyBatisPlus自动填充和逻辑删除

 逻辑删除:向实体类的逻辑删除字段添加@TableLogic(value = "0", delval = "1")注解.添加后,plus的语句会自动加上逻辑删除字段的判断(自己在xml文件中写的SQL依然需要自己维护逻辑删除的判断).

去除@TableLogic(value = "0", delval = "1")注解后,plus的语句恢复正常增删改查.

自动填充:有些字段如添加时间,添加用户,修改时间,修改用户.通过配置MetaObjectHandler的实现类,在实体类上加入@TableField(fill = FieldFill.INSERT_UPDATE)注解,即可实现自动在增改的时候进行赋值.

package com.test.boot.demo.util;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;
//import com.gosun.isap2.common.core.util.UserUtil;

import java.util.Date;

/**
 * @description 自定义的数据填充handler，分别写insert和update的写入策略。
 * @ClassName: MyFillDataMetaObjectHandler     mybatis-plus-generator  3.0.0
 */
@Component
public class MyFillDataMetaObjectHandler implements MetaObjectHandler {

    @Override
    public void insertFill(MetaObject metaObject) {
        System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>");
        this.strictInsertFill(metaObject, "addTime", Date.class, new Date());
        this.strictInsertFill(metaObject, "updateTime", Date.class, new Date());
//        this.strictInsertFill(metaObject, "addUser", String.class, UserUtil.getUser().getUserName());
        this.strictInsertFill(metaObject, "addUser", String.class, "LZK");
        this.strictInsertFill(metaObject, "isDelete", String.class, "0");
        System.out.println("<<<<<<<<<<<<<<<<<<<<<<<");
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        this.strictUpdateFill(metaObject, "updateTime", Date.class, new Date());
//        this.strictInsertFill(metaObject, "updateUser", String.class, UserUtil.getUser().getUserName());
    }

    /*
    逻辑删除向实体类中逻辑删除字段增加注解
    @TableLogic(value = "0", delval = "1")//定义逻辑删除功能。
    @TableField(fill = FieldFill.INSERT)//定义在insert的时候自动填充功能

    this.fillStrategy(metaObject, "createTime", LocalDateTime.now()); // (3.3.0该方法有bug  请升级到之后的版本如 3.3.1.8-SNAPSHOT)
*/

}

package com.test.boot.demo.entity;

import com.baomidou.mybatisplus.annotation.*;

import java.util.Date;
import java.io.Serializable;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;

/**
 * <p>
 * 考题设置表
 * </p>
 *
 * @author Zongkai.Li
 * @since 2021-01-11
 */
@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@TableName("t_examination_questions")
@ApiModel(value="ExaminationQuestions对象", description="考题设置表")
public class ExaminationQuestions implements Serializable {

    private static final long serialVersionUID = 1L;

    @ApiModelProperty(value = "id")
    @TableId(value = "id", type = IdType.AUTO)
    private Long id;

    @ApiModelProperty(value = "编码")
    private String code;

    @ApiModelProperty(value = "标题")
    private String titleName;

    @ApiModelProperty(value = "题目分数")
    private Long questionScore;

    @ApiModelProperty(value = "是否必答 1：是  0：否")
    private String isRequired;

    @ApiModelProperty(value = "提示")
    private String tips;

    @ApiModelProperty(value = "层级ID")
    private Long tierId;

    @ApiModelProperty(value = "是否删除(1:已删除; 0：未删除)")
    @TableLogic(value = "0", delval = "1")
    @TableField(fill = FieldFill.INSERT)
    private String isDelete;

    @ApiModelProperty(value = "添加时间")
    @TableField(fill = FieldFill.INSERT)
    private Date addTime;

    @ApiModelProperty(value = "添加用户")
    @TableField(fill = FieldFill.INSERT)
    private String addUser;

    @ApiModelProperty(value = "更新时间")
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date updateTime;

    @TableField(fill = FieldFill.INSERT_UPDATE)
    @ApiModelProperty(value = "更新用户")
    private String updateUser;


}