基于接口實現(xiàn)java動態(tài)代理示例

更新時間：2014年04月22日 09:30:28 作者：

這篇文章主要介紹了基于接口實現(xiàn)java動態(tài)代理示例,需要的朋友可以參考下

Subject.java

復制代碼代碼如下:

package _20140416_;

import java.util.List;

public interface Subject {
public String say(String name,int age);
public List<Person> getAllList(String name);
}

RealSubject.java

復制代碼代碼如下:

package _20140416_;

import java.util.ArrayList;
import java.util.List;

public class RealSubject implements Subject {

private String name;

public RealSubject(String name) {
this.name = name;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

@Override
public String say(String name, int age) {
return "名字:" + name + "_年齡:" + age;
}

@Override
public List<Person> getAllList(String name) {
  List<Person> list = new ArrayList<Person>();
  list.add(new Person("A", 20));
  list.add(new Person("B", 20));
  list.add(new Person("C", 20));
  list.add(new Person("D", 20));
  System.out.println(name);
  return list;
}

@Override
public int hashCode() {
return 10010;
}

@Override
public boolean equals(Object obj) {
  if(obj instanceof RealSubject){
   RealSubject real = (RealSubject)obj;
   System.out.println("getName():"+real.getName());
   System.out.println("this.name:"+this.name);
   if(real.getName()==this.name){
     System.out.println("相同");
   }else{
    System.out.println("不相同");
   }
  }
  return true;
}
}

MyInvercationHander.java

復制代碼代碼如下:

package _20140416_;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class MyInvercationHander implements InvocationHandler{

private Object obj;

public Object bind(Object obj){
  this.obj=obj;
  return Proxy.newProxyInstance(obj.getClass().getClassLoader(),obj.getClass().getInterfaces(),this);
}

@Override
public Object invoke(Object proxy, Method method, Object[] args)
   throws Throwable {
  Object temp = method.invoke(this.obj, args);
  //這里做切面操作比如我要加功能
  System.out.println("方法之前！");
  return temp;
}

}

Person.java

復制代碼代碼如下:

package _20140416_;

public class Person {
private String name;
private int age;

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;
}

public Person(String name, int age) {
  super();
  this.name = name;
  this.age = age;
}

}

MainTest.java

復制代碼代碼如下:

package _20140416_;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class MainTest {
public static void main(String[] args) {
      Subject subject = (Subject) new MyInvercationHander().bind(new RealSubject("中國"));
      System.out.println(subject.say("莫建鋒",22));
      System.out.println(subject.getAllList("張三"));
      Map<String,Integer> myMap = new HashMap<String, Integer>();
      myMap.put("A",1);
      myMap.put("B",2);
      myMap.put("C",3);
      myMap.put("D",4);
      myMap.put("E",5);
      Set<Map.Entry<String,Integer>> myEntrySet = myMap.entrySet();
      Iterator<Map.Entry<String,Integer>> it = myEntrySet.iterator();
      while(it.hasNext()){
       Map.Entry<String,Integer> entry = it.next();
       System.out.print(entry.getKey()+":");
       System.out.println(entry.getValue());

      }
      System.out.println(new RealSubject("中國").hashCode());
      System.out.println(new RealSubject("中國").equals(new RealSubject("中dd國")));
      String info = new String("1");
      String info1 = new String("1");
      System.out.println(new Integer('1'));
      System.out.println(info.hashCode());
      System.out.println(info1.hashCode());
      System.out.println(info==info1);
      System.out.println(info.equals(info1));
      short i = 1;
      System.out.println(i);
}
}