Java——简单代理服务器实现

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1、这个程序主要实现的是一个简单的代理功能。用户请求代理，代理请求指定页面再原封不动的传回客户端，代码如下：importjava.io.*;importjava.net.*;importjava.util.*;importjava.awt.*;importjavax.swing.*;publicclassProxyServerextendsJFrame{privateJTextAreajta=newJTextArea();//createanJTextAreatooutputsomeinformationpublicstaticvoidmain(String[]arg

2、s){newProxyServer();}publicProxyServer(){setLayout(newBorderLayout());add(newJScrollPane(jta),BorderLayout.CENTER);setTitle("ProxyServerbyLiZhaoji");setSize(500,300);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setVisible(true);try{ServerSocketserverSocket=newServerSocket(8081);//Li

3、steningport8081jta.append("ProxyServerstartedat"+newDate()+'');jta.append("ProxyServerislisteningonport"+serverSocket.getLocalPort()+''+'');intclientNo=1;while(true){Socketsocket=serverSocket.accept();jta.append("1*****************************************************************

4、***********1"+'');jta.append("Startingthreadforclient"+clientNo+"at"+newDate()+'');InetAddressinetAddress=socket.getInetAddress();//getthehostPC'sinformationjta.append("Client"+clientNo+"'shostnameis"+inetAddress.getHostName()+'');jta.append("Client"+clientNo+"'sIPAddressis"+ine

5、tAddress.getHostAddress()+'');HandleClienttask=newHandleClient(socket);newThread(task).start();//startanewthreadtohandletherequireofthehostclientNo++;}}catch(IOExceptionex){System.err.println(ex);}}classHandleClientimplementsRunnable{privateSocketsocket;publicHandleClient(Socketsock

6、et){this.socket=socket;}publicvoidrun(){try{BufferedReaderinputFromClient=newBufferedReader(newInputStreamReader(socket.getInputStream()));PrintStreamoutputToClient=newPrintStream(socket.getOutputStream());Stringstr=inputFromClient.readLine();//readtheGETrequirestringfromHostjta.appen

7、d("TherequirefromClient:"+str+'');Stringinurl=str.substring(4,str.indexOf("HTTP/")-1);//gettheURLstringfromGETjta.append("TherequireURL:"+inurl+'');URLurl=newURL(inurl);InputStreaminfile=url.openStream();//theinputstreamthatgetthedatafromWebServerintn=infile.available();//thenumbe

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