Bean 复制的几种框架比较

Bertha 。 2022-05-21 08:37 186阅读 0赞

## 4 种复制方法： ##

*  Apache BeanUtils
 *  Apache PropertyUtils
 *  Spring BeanUtils
 *  Cglib BeanCopier

测试 Bean，FromBean 与 ToBean 属性一致

public class FromBean { 
        private String name;
        private int age;
        private double money;
    
        public double getMoney() {
            return money;
        }
        public void setMoney(double money) {
            this.money = money;
        }
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public int getAge() {
            return age;
        }
        public void setAge(int age) {
            this.age = age;
        }
    }

## 测试方法 ##

import org.apache.commons.beanutils.BeanUtils;
    import org.apache.commons.beanutils.PropertyUtils;
    import org.springframework.cglib.beans.BeanCopier;
    
    public class Test { 
    
        public static void main(String[] args) {
            FromBean fb = new FromBean();
            fb.setAge(20);
            fb.setMoney(30000.111);
            fb.setName("测试");
    
            int count = 10;
    
            convert((tb) -> BeanUtils.copyProperties(tb, fb), count, "Apache BeanUtils.copyProperties");
    
            convert((tb) -> PropertyUtils.copyProperties(tb, fb), count, "Apache PropertyUtils.copyProperties");
    
            convert((tb) -> org.springframework.beans.BeanUtils.copyProperties(fb, tb), count, "Spring BeanUtils.copyProperties");
    
            BeanCopier bc = BeanCopier.create(FromBean.class, ToBean.class, false);
    
            convert((tb) -> bc.copy(fb, tb, null), count, "Cglib BeanCopier.copy");
    
        }
    
        public static void convert(ConvertBean cb, int count, String type) {
            try {
                System.out.println(type + "开始进行测试");
                long start = System.currentTimeMillis();
                for (int i = 0; i < count; i++) {
                    ToBean tobean = new ToBean();
                    cb.convertMethod(tobean);
                    System.out.println(tobean.getAge());
                    System.out.println(tobean.getMoney());
                    System.out.println(tobean.getName());
                }
                System.out.println("耗时 " + (System.currentTimeMillis() - start) + " ms");
                System.out.println("----------------------");
            } catch (Exception e) {
                System.out.println("Exception: " + e.getMessage());
                e.printStackTrace();
            }
        }
    }
    
    @FunctionalInterface
    interface ConvertBean {
    
        void convertMethod(ToBean tb) throws Exception;
    }

## 打印结果 ##

Apache BeanUtils.copyProperties开始进行测试
    耗时 1178 ms
    ----------------------
    Apache PropertyUtils.copyProperties开始进行测试
    耗时 5 ms
    ----------------------
    Spring BeanUtils.copyProperties开始进行测试
    耗时 172 ms
    ----------------------
    Cglib BeanCopier.copy开始进行测试
    耗时 0 ms
    ----------------------

## 测试结果 ##

> 单位：ms

### count：10 ###

<table> 
 <thead> 
  <tr> 
   <th align="center">次数：10</th> 
   <th align="center">第一次</th> 
   <th align="center">第二次</th> 
   <th align="center">第三次</th> 
   <th align="center">第四次</th> 
   <th align="center">平均值</th> 
   <th align="center">单次平均值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td align="center">Apache BeanUtils</td> 
   <td align="center">1178</td> 
   <td align="center">1029</td> 
   <td align="center">917</td> 
   <td align="center">1019</td> 
   <td align="center">1035.75</td> 
   <td align="center">103.575</td> 
  </tr> 
  <tr> 
   <td align="center">Apache PropertyUtils</td> 
   <td align="center">5</td> 
   <td align="center">4</td> 
   <td align="center">8</td> 
   <td align="center">4</td> 
   <td align="center">5.25</td> 
   <td align="center">0.525</td> 
  </tr> 
  <tr> 
   <td align="center">Spring BeanUtils</td> 
   <td align="center">172</td> 
   <td align="center">257</td> 
   <td align="center">123</td> 
   <td align="center">135</td> 
   <td align="center">171.75</td> 
   <td align="center">17.175</td> 
  </tr> 
  <tr> 
   <td align="center">Cglib BeanCopier</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
  </tr> 
 </tbody> 
</table>

### count：100 ###

<table> 
 <thead> 
  <tr> 
   <th align="center">次数：100</th> 
   <th align="center">第一次</th> 
   <th align="center">第二次</th> 
   <th align="center">第三次</th> 
   <th align="center">第四次</th> 
   <th align="center">平均值</th> 
   <th align="center">单次平均值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td align="center">Apache BeanUtils</td> 
   <td align="center">1868</td> 
   <td align="center">1258</td> 
   <td align="center">1624</td> 
   <td align="center">1260</td> 
   <td align="center">1502.5</td> 
   <td align="center">15.025</td> 
  </tr> 
  <tr> 
   <td align="center">Apache PropertyUtils</td> 
   <td align="center">16</td> 
   <td align="center">10</td> 
   <td align="center">18</td> 
   <td align="center">17</td> 
   <td align="center">15.25</td> 
   <td align="center">0.1525</td> 
  </tr> 
  <tr> 
   <td align="center">Spring BeanUtils</td> 
   <td align="center">193</td> 
   <td align="center">152</td> 
   <td align="center">209</td> 
   <td align="center">215</td> 
   <td align="center">192.25</td> 
   <td align="center">1.9225</td> 
  </tr> 
  <tr> 
   <td align="center">Cglib BeanCopier</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
   <td align="center">0</td> 
  </tr> 
 </tbody> 
</table>

### count：10000 ###

<table> 
 <thead> 
  <tr> 
   <th align="center">次数：10000</th> 
   <th align="center">第一次</th> 
   <th align="center">第二次</th> 
   <th align="center">第三次</th> 
   <th align="center">第四次</th> 
   <th align="center">平均值</th> 
   <th align="center">单次平均值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td align="center">Apache BeanUtils</td> 
   <td align="center">1611</td> 
   <td align="center">1657</td> 
   <td align="center">1786</td> 
   <td align="center">1572</td> 
   <td align="center">1656.5</td> 
   <td align="center">0.16565</td> 
  </tr> 
  <tr> 
   <td align="center">Apache PropertyUtils</td> 
   <td align="center">243</td> 
   <td align="center">64</td> 
   <td align="center">194</td> 
   <td align="center">111</td> 
   <td align="center">153</td> 
   <td align="center">0.0153</td> 
  </tr> 
  <tr> 
   <td align="center">Spring BeanUtils</td> 
   <td align="center">551</td> 
   <td align="center">217</td> 
   <td align="center">433</td> 
   <td align="center">431</td> 
   <td align="center">408</td> 
   <td align="center">0.0408</td> 
  </tr> 
  <tr> 
   <td align="center">Cglib BeanCopier</td> 
   <td align="center">10</td> 
   <td align="center">6</td> 
   <td align="center">3</td> 
   <td align="center">7</td> 
   <td align="center">6.5</td> 
   <td align="center">0.00065</td> 
  </tr> 
 </tbody> 
</table>

## 结论 ##

*  数量越大平均每次耗时越少
 *  综合 Cglib BeanCopier 性能最好，但在使用前，要先用 BeanCopier.create 定义

> Cglib在测试的时候，先进行了实例的缓存，这个也是他性能较好的原因