使用Mybatis-Plus实现对象属性自动填充功能

<dependencies>
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.0.6</version>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>runtime</scope>
    </dependency>
</dependencies>

/**   
 * Copyright © 2019 DBRG. All rights reserved.
 * 
 * @Title: DbrgMetaObjectHandler.java 
 * @Prject: syswms
 * @Package: com.dbrg.project.handler 
 * @version: V1.0   
 */
package com.dbrg.project.handler;
 
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;
 
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import com.dbrg.common.utils.DateUtils;
import com.dbrg.common.utils.security.ShiroUtils;
 
/** 
 * @ClassName: DbrgMetaObjectHandler 
 * @Description:元对象自动填充处理器
 * @author: yelangking
 * @date: 2019年3月4日 上午9:14:18  
 */
@Component
public class DbrgMetaObjectHandler implements MetaObjectHandler{
  private static final String CREATE_BY_FIELD_NAME = "createBy";
  private static final String CREATE_TIME_FIELD_NAME = "createTime";
  private static final String UPDATE_BY_FIELD_NAME = "updateBy";
  private static final String UPDATE_TIME_FIELD_NAME = "updateTime";
 
  /* (non Javadoc) 
   * @Title: insertFill
   * @Description: {简单描述}
   * @param arg0 
   * @see com.baomidou.mybatisplus.core.handlers.MetaObjectHandler#insertFill(org.apache.ibatis.reflection.MetaObject) 
   */
  @Override
  public void insertFill(MetaObject metaObject) {
    //1、自动设置创建人信息,当外部接口调用时，用户可能为空
    if(null != ShiroUtils.getSysUser()){
      this.setFieldValByName(CREATE_BY_FIELD_NAME,ShiroUtils.getUserId(),metaObject);
    }
    //2、自动设置创建时间
    this.setFieldValByName(CREATE_TIME_FIELD_NAME, DateUtils.getNowDate(), metaObject);
    //3、自动设置更新人信息,当外部接口调用时，用户可能为空
    if(null != ShiroUtils.getSysUser()){
      this.setFieldValByName(UPDATE_BY_FIELD_NAME,ShiroUtils.getUserId(),metaObject);
    }
    //4、自动设置更新时间
    this.setFieldValByName(UPDATE_TIME_FIELD_NAME, DateUtils.getNowDate(), metaObject);
  }
 
  /* (non Javadoc) 
   * @Title: updateFill
   * @Description: {简单描述}
   * @param arg0 
   * @see com.baomidou.mybatisplus.core.handlers.MetaObjectHandler#updateFill(org.apache.ibatis.reflection.MetaObject) 
   */
  @Override
  public void updateFill(MetaObject metaObject) {
    //1、自动设置更新人信息,当外部接口调用时，用户可能为空
    if(null != ShiroUtils.getSysUser()){
      this.setFieldValByName(UPDATE_BY_FIELD_NAME,ShiroUtils.getUserId(),metaObject);
    }
    //2、自动设置更新时间
    this.setFieldValByName(UPDATE_TIME_FIELD_NAME, DateUtils.getNowDate(), metaObject);
  }
}

 
/**   
 * Copyright © 2019 DBRG. All rights reserved.
 * 
 * @Title: MpBaseEntity.java 
 * @Prject: syswms
 * @Package: com.dbrg.framework.web.domain 
 * @version: V1.0   
 */
package com.dbrg.framework.web.domain;
 
import java.io.Serializable;
import java.util.Date;
 
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import com.fasterxml.jackson.annotation.JsonFormat;
 
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
 
/** 
 * @ClassName: MpBaseEntity 
 * @Description:mybatis plus 自动注入基类，结合FieledFill策略类一起使用，
 * 默认包含创建人、创建时间、更新人、更新时间信息，业务表单中包含此字段的集成本类即可。如无明确要求，可不做任何处理。
 * @author: yelangking
 * @date: 2019年3月4日 上午9:03:12  
 */
@Setter
@Getter
@NoArgsConstructor
@AllArgsConstructor
public class MpBaseEntity implements Serializable{
  private static final long serialVersionUID = 2234596156219712753L;
  /**
   * 创建人
   */
  @TableField(value="create_by",fill=FieldFill.INSERT)
  private Long createBy;
  /** 创建时间 */
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    @TableField(value="create_time",fill=FieldFill.INSERT)
  private Date createTime;
    /**
     * 更新人
     */
    @TableField(value="update_by",fill=FieldFill.INSERT_UPDATE)
    private Long updateBy;
    /**
     * 更新时间
     */
    @TableField(value="update_time",fill=FieldFill.INSERT_UPDATE)
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date updateTime;
}

c.b.samples.metainfo.AutoFillTest : Started AutoFillTest in 9.239 seconds (JVM running for 17.064)
c.b.s.m.handler.MyMetaObjectHandler: start insert fill ....
c.b.s.metainfo.mapper.UserMapper.insert: ==> Preparing: INSERT INTO user ( ID, NAME, AGE, EMAIL, OPERATOR ) VALUES ( ?, ?, ?, ?, ? )
c.b.s.metainfo.mapper.UserMapper.insert: ==> Parameters: 1381223322590720001(Long), Tom(String), 1(Integer), tom@qq.com(String), Jetty(String)
c.b.s.metainfo.mapper.UserMapper.insert: <== Updates: 1
c.b.s.m.mapper.UserMapper.selectById: ==>  Preparing: SELECT ID,NAME,AGE,EMAIL,OPERATOR FROM user WHERE ID=?
c.b.s.m.mapper.UserMapper.selectById: ==> Parameters: 1381223322590720001(Long)
c.b.s.m.mapper.UserMapper.selectById: <== Total: 1
c.b.samples.metainfo.AutoFillTest: query user:User(id=1381223322590720001, name=Tom, age=1, email=tom@qq.com, operator=Jetty)
c.b.s.m.mapper.UserMapper.selectById: ==> Preparing: SELECT ID,NAME,AGE,EMAIL,OPERATOR FROM user WHERE ID=?
c.b.s.m.mapper.UserMapper.selectById: ==> Parameters: 1(Long)
c.b.s.m.mapper.UserMapper.selectById: <== Total: 1
c.b.samples.metainfo.AutoFillTest: before user:User(id=1, name=Jone, age=18, email=test1@baomidou.com, operator=test)
c.b.s.m.handler.MyMetaObjectHandler : start update fill ....
c.b.s.m.mapper.UserMapper.updateById: ==> Preparing: UPDATE user SET NAME=?, AGE=?, EMAIL=?, OPERATOR=? WHERE ID=?
c.b.s.m.mapper.UserMapper.updateById: ==> Parameters: Jone(String), 12(Integer), test1@baomidou.com(String), test(String), 1(Long)
c.b.s.m.mapper.UserMapper.updateById: <==   Updates: 1