Springboot整合Mybatis-Plus代码方法设置时间自动更新

User类

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 lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.util.Date;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    
    

    @TableId(type = IdType.AUTO)
    private Long id;

    private String name;

    private Integer age;

    private String email;

    @TableField(fill= FieldFill.INSERT)
    private Date createTime;

    @TableField(fill=FieldFill.INSERT_UPDATE)
    private Date updateTime;

}

MyMetaObjectHandler类

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 {
    
    

    /**
     * 插入时的填充策略
     * @param metaObject
     */
    @Override
    public void insertFill(MetaObject metaObject) {
    
    
        log.info("start insert fill...");
        //  setFieldValByName(String fieldName, Object fieldVal, MetaObject metaObject) {
    
    
        this.setFieldValByName("createTime",new Date(),metaObject);
        this.setFieldValByName("updateTime",new Date(),metaObject);
    }

    /**
     * 更新时的填充策略
     * @param metaObject
     */
    @Override
    public void updateFill(MetaObject metaObject) {
    
    
        log.info("start update fill...");
        this.setFieldValByName("updateTime",new Date(),metaObject);
    }
}

测试类

@SpringBootTest
class MybatisPlusApplicationTests {
    
    

    @Autowired
    private UserMapper userMapper;

    @Test
    void testInsert() {
    
    
        User user = new User();
        user.setName("jyuxuan");
        user.setAge(20);
        user.setEmail("[email protected]");
        userMapper.insert(user);
    }

    @Test
    void testUpdate() {
    
    
        User user = new User();
        user.setId(6L);
        user.setAge(18);
        user.setEmail("[email protected]");
        int row = userMapper.updateById(user);
        System.out.println(row);
    }
}