Java Socket实战之三 传输对象

前面两篇文章介绍了怎样建立Java Socket通信，这一篇说一下怎样使用Java Socket来传输对象。

首先需要一个普通的对象类，由于需要序列化这个对象以便在网络上传输，所以实现java.io.Serializable接口就是必不可少的了，入下：

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package com.googlecode.garbagecan.test.socket.sample3;

public class User implements java.io.Serializable {

private static final long serialVersionUID = 1L;

private String name;

private String password;

public User() {

}

public User(String name, String password) {

this.name = name;

this.password = password;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

}

对于Server端的代码，代码中分别使用了ObjectInputStream和ObjectOutputStream来接收和发送socket中的InputStream和OutputStream，然后转换成Java对象，如下：

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package com.googlecode.garbagecan.test.socket.sample3;

import java.io.*;

import java.net.ServerSocket;

import java.net.Socket;

import java.util.logging.Level;

import java.util.logging.Logger;

public class MyServer {

private final static Logger logger = Logger.getLogger(MyServer.class.getName());

public static void main(String[] args) throws IOException {

ServerSocket server = new ServerSocket(10000);

while (true) {

Socket socket = server.accept();

invoke(socket);

}

}

private static void invoke(final Socket socket) throws IOException {

new Thread(new Runnable() {

public void run() {

ObjectInputStream is = null;

ObjectOutputStream os = null;

try {

is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream()));

os = new ObjectOutputStream(socket.getOutputStream());

Object obj = is.readObject();

User user = (User)obj;

System.out.println("user: " + user.getName() + "/" + user.getPassword());

user.setName(user.getName() + "_new");

user.setPassword(user.getPassword() + "_new");

os.writeObject(user);

os.flush();

} catch (IOException ex) {

logger.log(Level.SEVERE, null, ex);

} catch(ClassNotFoundException ex) {

logger.log(Level.SEVERE, null, ex);

} finally {

try {

is.close();

} catch(Exception ex) {}

try {

os.close();

} catch(Exception ex) {}

try {

socket.close();

} catch(Exception ex) {}

}

}

}).start();

}

}

Client也和Server端类似，同样使用ObjectOutputStream和ObjectInputStream来处理，如下：

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package com.googlecode.garbagecan.test.socket.sample3;

import java.io.BufferedInputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.net.Socket;

import java.util.logging.Level;

import java.util.logging.Logger;

public class MyClient {

private final static Logger logger = Logger.getLogger(MyClient.class.getName());

public static void main(String[] args) throws Exception {

for (int i = 0; i < 100; i++) {

Socket socket = null;

ObjectOutputStream os = null;

ObjectInputStream is = null;

try {

socket = new Socket("localhost", 10000);

os = new ObjectOutputStream(socket.getOutputStream());

User user = new User("user_" + i, "password_" + i);

os.writeObject(user);

os.flush();

is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream()));

Object obj = is.readObject();

if (obj != null) {

user = (User)obj;

System.out.println("user: " + user.getName() + "/" + user.getPassword());

}

} catch(IOException ex) {

logger.log(Level.SEVERE, null, ex);

} finally {

try {

is.close();

} catch(Exception ex) {}

try {

os.close();

} catch(Exception ex) {}

try {

socket.close();

} catch(Exception ex) {}

}

}

}

}

最后测试上面的代码，首先运行Server类，然后运行Client类，就可以分别在Server端和Client端控制台看到接收到的User对象实例了。