Detailed explanation of three methods of object attribute copying

Three methods of copying object properties:

1. BeanUtil.copyProperties and PropertyUtil.copyProperties two methods provided by Apache

BeanUtils.copyProperties("Converted class ", "Class to be converted"); //One more step of type conversion, even less efficient than PropertyUtils

　PropertyUtils.copyProperties( "Converted class", "Class to be converted");

## Tip: Pay later (pay later) Front: copy the latter to the front) will throw an exception

2. BeanUtil.copyProperties method provided by spring

BeanUtils.copyProperties(

"Class to be converted ", "Converted class");

Reverse the order of Apache parameters

3. The copy method provided by cglib

BeanCopier copy=BeanCopier.create("Class to be converted"

, "Converted class", false);

copy.copy(from, to,

null);##4. The copy method provided by spring

BeanCopier copy=BeanCopier. create("Class to be converted"

, "Converted class"

, false); copy.copy(from, to ,

null);

1 /**2  * Created by hunt on 2017/6/28.3  */4 @Data5 public class TestFrom {6     private String name;7 }

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1 import lombok.Data;2 3 /**4  * Created by hunt on 2017/6/28.5  */6 @Data7 public class TestTo {8     private String name;9 }

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BeanUtils efficiency test of the first Apache method:

 1 import org.apache.commons.beanutils.BeanUtils; 2  3 import java.lang.reflect.InvocationTargetException; 4  5 /** 6  * Created by hunt on 2017/6/28. 7  */ 8 public class TestDemo { 9     public static void main(String[] args) throws InvocationTargetException, IllegalAccessException {10         TestFrom testFrom = new TestFrom();11         testFrom.setName("hunt");12         TestTo testTo = new TestTo();13         long begin = System.currentTimeMillis();14         for (int i = 0; i <img class="code_img_opened lazy" src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/000/001/844fe4c2945742be3634bad9d562a21a-5.gif?x-oss-process=image/resize,p_40" id="code_img_opened_fb866e61-a94a-42a3-9260-e47506e17ff4" alt=""><div class="cnblogs_code_hide">View Code</div><span class="cnblogs_code_collapse"></span>

PropertyUtils efficiency test of the first Apache method:

 1 import org.apache.commons.beanutils.PropertyUtils; 2  3 import java.lang.reflect.InvocationTargetException; 4  5 /** 6  * Created by hunt on 2017/6/28. 7  */ 8 public class TestDemo { 9     public static void main(String[] args) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {10         TestFrom testFrom = new TestFrom();11         testFrom.setName("hunt");12         TestTo testTo = new TestTo();13         long begin = System.currentTimeMillis();14         for (int i = 0; i <img class="code_img_opened lazy" src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/000/001/ed3b8b12748b6202f22d909ee69fc9d4-8.gif?x-oss-process=image/resize,p_40" id="code_img_opened_52a00be7-7521-4c25-8a22-ffdd6cf7e62e" alt=""><div class="cnblogs_code_hide">View Code</div><span class="cnblogs_code_collapse"></span>

##The second Spring method of BeanUtils efficiency test:

 1 import org.springframework.beans.BeanUtils; 2  3 /** 4  * Created by hunt on 2017/6/28. 5  */ 6 public class TestDemo { 7     public static void main(String[] args) { 8         TestFrom testFrom = new TestFrom(); 9         testFrom.setName("hunt");10         TestTo testTo = new TestTo();11         long begin = System.currentTimeMillis();12         for (int i = 0; i <img class="code_img_closed lazy" src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/000/001/ed3b8b12748b6202f22d909ee69fc9d4-10.gif?x-oss-process=image/resize,p_40" id="code_img_closed_0920486e-e118-4826-a359-73cdf34706f6" alt=""><img class="code_img_opened lazy" src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/000/001/ed3b8b12748b6202f22d909ee69fc9d4-11.gif?x-oss-process=image/resize,p_40" id="code_img_opened_0920486e-e118-4826-a359-73cdf34706f6" alt="">View Code<div class="cnblogs_code_hide"></div><p><img src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/000/001/ed3b8b12748b6202f22d909ee69fc9d4-12.png?x-oss-process=image/resize,p_40" class="lazy" alt=""></p><p>第三种方式cglib的copy效率测试</p><div class="cnblogs_code">
<img class="code_img_closed lazy" src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/000/001/ed3b8b12748b6202f22d909ee69fc9d4-13.gif?x-oss-process=image/resize,p_40" id="code_img_closed_1e44eb70-fcb4-4fd7-9e6e-361937be1f4f" alt=""><img class="code_img_opened lazy" src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/000/001/a876777311618872c2968afb1fdb9f40-14.gif?x-oss-process=image/resize,p_40" id="code_img_opened_1e44eb70-fcb4-4fd7-9e6e-361937be1f4f" alt=""><div class="cnblogs_code_hide"><pre class="brush:php;toolbar:false"> 1 import net.sf.cglib.beans.BeanCopier; 2  3 /** 4  * Created by hunt on 2017/6/28. 5  */ 6 public class TestDemo { 7     public static void main(String[] args) { 8         TestFrom testFrom = new TestFrom(); 9         testFrom.setName("hunt");10         TestTo testTo = new TestTo();11         long begin = System.currentTimeMillis();12         for (int i = 0; i 

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