mybatis-plus自动填充

我们在做项目的时候，数据库中的某些字段如：创建人（create_user）、创建时间（create_time）、更新人（update_user）、更新时间（update_time）我们希望自动填充，不需要手动更新。

import com.baomidou.mybatisplus.annotation.*;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import io.swagger.annotations.ApiModelProperty;
import org.springframework.format.annotation.DateTimeFormat;
import java.io.Serializable;
import java.util.Date;


public class BasicEntity  implements Serializable {
	private static final long serialVersionUID = 1L;

	@ApiModelProperty("创建人")
	@TableField(value = "create_user", fill = FieldFill.INSERT)
	private Long createUser;

	@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
	@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
	@ApiModelProperty("创建时间")
	@TableField(value = "create_time", fill = FieldFill.INSERT)
	private Date createTime;

	@JsonSerialize(using = ToStringSerializer.class)
	@ApiModelProperty("更新人")
	@TableField(value = "update_user", fill = FieldFill.INSERT_UPDATE)
	private Long updateUser;

	@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
	@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
	@ApiModelProperty("更新时间")
	@TableField(value = "update_time", fill = FieldFill.INSERT_UPDATE)
	private Date updateTime;

	@ApiModelProperty("业务状态")
	@TableField(value = "status")
	private Integer status;

	@TableLogic
	@ApiModelProperty("是否已删除")
	@TableField(value = "is_deleted")
	private Integer isDeleted;

}

import cn.hutool.core.util.ObjectUtil;
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.springblade.core.secure.BladeUser;
import org.springblade.core.secure.utils.SecureUtil;
import org.springframework.stereotype.Component;
import java.util.Date;

@Component
public class MetaHandler  implements MetaObjectHandler {


	
	@Override
	public void insertFill(MetaObject metaObject) {
		BladeUser user = SecureUtil.getUser();
		boolean hasSetter = metaObject.hasSetter("createTime");
		if (hasSetter) {
			this.setFieldValByName("createTime", new Date(), metaObject);
			this.setFieldValByName("updateUser", user.getUserId(), metaObject);
			this.setFieldValByName("updateTime", new Date(), metaObject);
			this.setFieldValByName("updateUser", user.getUserId(), metaObject);
		}
	}

	
	@Override
	public void updateFill(MetaObject metaObject) {
		BladeUser user = SecureUtil.getUser();
		if (ObjectUtil.isEmpty(getFieldValByName("updateTime", metaObject))) {
			this.setFieldValByName("updateTime", new Date(), metaObject);
			this.setFieldValByName("updateUser", user.getUserId(), metaObject);
		}
	}

}

import com.baomidou.mybatisplus.core.config.GlobalConfig;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MyBatisPlusConfig {
	
	@Bean
	public GlobalConfig globalConfig() {
		GlobalConfig globalConfig = new GlobalConfig();
		globalConfig.setMetaObjectHandler(new MetaHandler());
		return globalConfig;
	}
}

重启项目，以上四个字段便自动维护