Java Bean Copy 性能大比拼

朴灿烈づ我的快乐病毒、 2022-02-13 01:25 320阅读 0赞

# Java Bean Copy 性能大比拼 #

## 简介 ##

Bean 拷贝在工作中被大量使用，可以大幅度的提高工作量。本文对常用的 Bean copy 工具进行了压力测试，方便大家选择更加适合自己的工具。本篇文章是[mica cglib 增强——【01】cglib bean copy 介绍][mica cglib _01_cglib bean copy] 续篇，该专栏会持续更新，感兴趣的朋友请订阅我们。

## bean 拷贝工具 ##

*  [MapStruct (编译期生成 Mapper 实现)][MapStruct _ Mapper]
 *  [Selma (编译期生成 Mapper 实现)][Selma _ Mapper]
 *  [yangtu222 - BeanUtils (第一次生成 copy 实现字节码)][yangtu222 - BeanUtils _ copy]
 *  [mica (第一次生成 copy 实现字节码)][mica _ copy]
 *  [hutool (反射)][hutool]

## 模型 ##

#### 无类型转换 ####

/**
     * 来源用户
     *
     * @author L.cm
     */
    @Data
    public class FormUser {
        private Long id;
        private String nickName;
        private Integer age;
        private String phone;
        private String email;
        private String password;
        private Integer gender;
        private String avatar;
    }
    
    /**
     * 转换的用户
     *
     * @author L.cm
     */
    @Data
    public class ToUser {
        private String nickName;
        private String phone;
        private String email;
        private Integer gender;
        private String avatar;
    }

#### 带类型转换 ####

/**
     * 附带类型转换的 用户模型
     *
     * @author L.cm
     */
    @Data
    @Accessors(chain = true)
    public class FormConvertUser {
        private Long id;
        private String nickName;
        private Integer age;
        private String phone;
        private String email;
        private String password;
        private Integer gender;
        private String avatar;
        @DateTimeFormat(pattern = DateUtil.PATTERN_DATETIME)
        private LocalDateTime birthday;
    }
    
    /**
     * 附带类型转换的 用户模型
     *
     * @author L.cm
     */
    @Data
    @Accessors(chain = true)
    public class ToConvertUser {
        private String nickName;
        private Integer age;
        private String phone;
        private String email;
        private String password;
        private Integer gender;
        private String avatar;
        private String birthday;
    }

## Bean copy 压测结果 ##

#### 环境 ####

*  OS: macOS Mojave
 *  CPU: 2.8 GHz Intel Core i5
 *  RAM: 8 GB 1600 MHz DDR3
 *  JVM: Oracle 1.8.0\_201 64 bits

#### 简单模型 ####

<table> 
 <thead> 
  <tr> 
   <th>Benchmark</th> 
   <th>Mode</th> 
   <th>Cnt</th> 
   <th>Score</th> 
   <th>Error</th> 
   <th>Units</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>hutoolBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>1939.092 ±</td> 
   <td>26.747</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>springBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>3569.035 ±</td> 
   <td>39.607</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>cglibBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>9112.785 ±</td> 
   <td>560.503</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>micaBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>17753.409 ±</td> 
   <td>393.245</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>yangtu222BeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>18201.997 ±</td> 
   <td>119.189</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>cglibMapperBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>37679.510 ±</td> 
   <td>3544.624</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>mapStructBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>50328.045 ±</td> 
   <td>529.707</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>selmaBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>200859.561 ±</td> 
   <td>2370.531</td> 
   <td>ops/ms</td> 
  </tr> 
 </tbody> 
</table>

#### 附带类型转换(日期) ####

<table> 
 <thead> 
  <tr> 
   <th>Benchmark</th> 
   <th>Mode</th> 
   <th>Cnt</th> 
   <th>Score</th> 
   <th>Error</th> 
   <th>Units</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>micaBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>1186.375 ±</td> 
   <td>64.686</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>mapStructBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>1623.478 ±</td> 
   <td>13.894</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>selmaBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>160020.595 ±</td> 
   <td>2570.747</td> 
   <td>ops/ms</td> 
  </tr> 
 </tbody> 
</table>

#### 列表模型(100 item) ####

<table> 
 <thead> 
  <tr> 
   <th>Benchmark</th> 
   <th>Mode</th> 
   <th>Cnt</th> 
   <th>Score</th> 
   <th>Error</th> 
   <th>Units</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>springBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>35.974 ±</td> 
   <td>0.555</td> 
   <td>ops/ms</td> 
  </tr> 
  <tr> 
   <td>micaBeanCopy</td> 
   <td>thrpt</td> 
   <td>5</td> 
   <td>169.066 ±</td> 
   <td>5.460</td> 
   <td>ops/ms</td> 
  </tr> 
 </tbody> 
</table>

#### Map 拷贝到 bean ####

## 结论 ##

和 [java-object-mapper-benchmark][] 测试结果有些出入。

Selma 的表现反而比 MapStruct 更好，可能是模型不一样导致的。

#### 功能比较 ####

<table> 
 <thead> 
  <tr> 
   <th>工具包</th> 
   <th>需要编写Mapper</th> 
   <th>支持Map</th> 
   <th>支持List、Set</th> 
   <th>类型转换</th> 
   <th>性能</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>Selma</td> 
   <td>是</td> 
   <td>否</td> 
   <td>否</td> 
   <td>需要手写转换</td> 
   <td>极高</td> 
  </tr> 
  <tr> 
   <td>MapStruct</td> 
   <td>是</td> 
   <td>否</td> 
   <td>否</td> 
   <td>支持常用类型和复杂表达式</td> 
   <td>极高</td> 
  </tr> 
  <tr> 
   <td>BeanUtils（yangtu222）</td> 
   <td>否</td> 
   <td>否</td> 
   <td>是</td> 
   <td>需要手写转换</td> 
   <td>极高</td> 
  </tr> 
  <tr> 
   <td>mica</td> 
   <td>否</td> 
   <td>是</td> 
   <td>是</td> 
   <td>是用 Spring 的类型转换</td> 
   <td>极高</td> 
  </tr> 
  <tr> 
   <td>Spring</td> 
   <td>否</td> 
   <td>否</td> 
   <td>否</td> 
   <td>不支持</td> 
   <td>高</td> 
  </tr> 
  <tr> 
   <td>hutool</td> 
   <td>否</td> 
   <td>是</td> 
   <td>否</td> 
   <td>不支持</td> 
   <td>高</td> 
  </tr> 
 </tbody> 
</table>

## 链接 ##

本项目源码：[https://github.com/lets-mica/mica-jmh][https_github.com_lets-mica_mica-jmh]

## 开源推荐 ##

*  Spring boot 微服务高效开发 `mica` 工具集：[https://gitee.com/596392912/mica][https_gitee.com_596392912_mica]
 *  `Avue` 一款基于vue可配置化的神奇框架：[https://gitee.com/smallweigit/avue][https_gitee.com_smallweigit_avue]
 *  `pig` 宇宙最强微服务（架构师必备）：[https://gitee.com/log4j/pig][https_gitee.com_log4j_pig]
 *  `SpringBlade` 完整的线上解决方案（企业开发必备）：[https://gitee.com/smallc/SpringBlade][https_gitee.com_smallc_SpringBlade]
 *  `IJPay` 支付SDK让支付触手可及：[https://gitee.com/javen205/IJPay][https_gitee.com_javen205_IJPay]

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[mica cglib _01_cglib bean copy]: https://www.yuque.com/dreamlu/mica/bean-copy-01
[MapStruct _ Mapper]: http://mapstruct.org/
[Selma _ Mapper]: http://www.selma-java.org/
[yangtu222 - BeanUtils _ copy]: https://github.com/yangtu222/BeanUtils
[mica _ copy]: https://github.com/lets-mica/mica
[hutool]: https://gitee.com/loolly/hutool
[java-object-mapper-benchmark]: https://github.com/arey/java-object-mapper-benchmark
[https_github.com_lets-mica_mica-jmh]: https://github.com/lets-mica/mica-jmh
[https_gitee.com_596392912_mica]: https://gitee.com/596392912/mica
[https_gitee.com_smallweigit_avue]: https://gitee.com/smallweigit/avue
[https_gitee.com_log4j_pig]: https://gitee.com/log4j/pig
[https_gitee.com_smallc_SpringBlade]: https://gitee.com/smallc/SpringBlade
[https_gitee.com_javen205_IJPay]: https://gitee.com/javen205/IJPay
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