工具

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
@Component
public class MetaObjectHandlerConfig implements MetaObjectHandler {
    // 插入时自动填充时间
    @Override
    public void insertFill(MetaObject metaObject) {
        this.strictInsertFill(metaObject, "createTime", LocalDateTime::now, LocalDateTime.class);
        this.strictInsertFill(metaObject, "updateTime", LocalDateTime::now, LocalDateTime.class);
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        this.strictUpdateFill(metaObject, "updateTime", LocalDateTime::now, LocalDateTime.class);
    }
}

在create时间上 :  @TableField(fill = FieldFill.INSERT)

在update时间上 :  @TableField(fill = FieldFill.INSERT_UPDATE)

import com.baomidou.mybatisplus.annotation.*;

import java.time.LocalDateTime;
import java.io.Serializable;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;
import org.springframework.stereotype.Component;

/**
 * <p>
 * 
 * </p>
 *
 * @author v
 * @since 2025-05-06
 */
@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@TableName("tb_user")
@Component
public class TbUser implements Serializable {
    private static final long serialVersionUID = 1L;
    
    @TableId(value = "user_id", type = IdType.AUTO)
    private Long userId;
    private String username;
    private String password;
    private String phone;
    private Integer role;
    
    @TableField(fill = FieldFill.INSERT)
    private LocalDateTime createTime;
    
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private LocalDateTime updateTime;
}