Mybatis-plus字段自动填充

将create_time默认设置为CURRENT_TIMESTAMP
将update_time默认设置为ON UPDATE CURRENT_TIMESTAMP
实体类中

    @ApiModelProperty(value = "创建时间")
    @TableField(value = "create_time",fill = FieldFill.INSERT)
    private Date createTime;
    
    @ApiModelProperty(value = "更新时间")
    @TableField(value = "update_time",fill = FieldFill.INSERT_UPDATE)
    private Date updateTime;

自定义类，实现 metaObjectHandler 接口，并重写方法
注意：fieldName要和实体类中的属性名对应，否则不会生效

import com.baomidou.mybatisplus.core.handlers.metaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.metaObject;
import org.springframework.stereotype.Component;

import java.util.Date;

@Slf4j
@Component
public class MymetaObjectHandler implements metaObjectHandler {
    
    @Override
    public void insertFill(metaObject metaObject) {
        log.info("start insert fill...");
        this.strictInsertFill(metaObject, "createTime", Date.class, new Date());
    }

    @Override
    public void updateFill(metaObject metaObject) {
        log.info("start update fill...");
        this.strictUpdateFill(metaObject,"updateTime",Date.class,new Date());
    }
}