差異處
這裏顯示兩個版本的差異處。
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java:guava:reflections:newproxy [2016/04/13 13:39] tony 建立 |
java:guava:reflections:newproxy [2023/06/25 09:48] |
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| - | {{tag>java guava}} | ||
| - | ====== Reflection.newProxy ====== | ||
| - | ===== Introduction ===== | ||
| - | 在傳統方法中，要針對某一個類別中的方法做特殊處理，通常我們會將其覆寫或透過Proxy Pattern方式；現今甚至可以透過AOP方式，去達到我們的目的。而Guava提供的是簡便的Dynamic Proxy方式。 | ||
| - | ===== How to? ===== | ||
| - | <code java> | ||
| - | package org.tonylin.practice.guava.reflection; | ||
| - | import java.lang.reflect.Method; | ||
| - | |||
| - | import org.junit.Assert; | ||
| - | import org.junit.Test; | ||
| - | |||
| - | import com.google.common.reflect.Reflection; | ||
| - | |||
| - | public class TestReflection { | ||
| - | |||
| - | interface TestClassInterface { | ||
| - | int test1(); | ||
| - | int test2(); | ||
| - | } | ||
| - | |||
| - | public static class TestClass implements TestClassInterface { | ||
| - | public int test1(){ | ||
| - | System.out.println("test1"); | ||
| - | return 1; | ||
| - | } | ||
| - | |||
| - | public int test2(){ | ||
| - | System.out.println("test2"); | ||
| - | return 2; | ||
| - | } | ||
| - | } | ||
| - | |||
| - | @Test | ||
| - | public void testNewProxy(){ | ||
| - | TestClass tc = new TestClass(); | ||
| - | TestClassInterface tci= Reflection.newProxy(TestClassInterface.class, | ||
| - | (Object proxy, Method method, Object[] args)->{ | ||
| - | |||
| - | if( method.getName().equals("test2") ) { | ||
| - | return (int)method.invoke(tc, args)+1; | ||
| - | } | ||
| - | System.out.println("proxy"); | ||
| - | return method.invoke(tc, args); | ||
| - | }); | ||
| - | |||
| - | System.out.println("execute: "); | ||
| - | Assert.assertEquals(1, tci.test1()); | ||
| - | Assert.assertEquals(3, tci.test2()); | ||
| - | } | ||
| - | |||
| - | } | ||
| - | </code> | ||
| - | |||
| - | ===== Resource ===== | ||
| - | * [[http://n3integration.com/2015/09/23/instrument-java-classes/|Guava - Reflection.newProxy]] | ||
| - | |||
| - | ===== ===== | ||
| - | ---- | ||
| - | \\ | ||
| - | ~~DISQUS~~ | ||
