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本文地址：http://blog.csdn.net/kongxx/article/details/7259834

Java Socket實戰(zhàn)之一 單線程通信

Java Socket實戰(zhàn)之二 多線程通信

Java Socket實戰(zhàn)之三 傳輸對象

上一篇文章說到了用Java Socket來傳輸對象，但是在有些情況下比如網(wǎng)絡(luò)環(huán)境不好或者對象比較大的情況下需要把數(shù)據(jù)對象進行壓縮然后在傳輸，此時就需要壓縮這些對象流，此時就可以GZIPInputStream和GZIPOutputStream來處理一下socket的InputStream和OutputStream。

仍然需要一個實現(xiàn)了java.io.Serializable接口的簡單Java對象

package com.googlecode.garbagecan.test.socket.sample4;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;}}在Server端使用，socket的InputStream首先被包裝成GZIPInputStream，然后又被包裝成ObjectInputStream，而socket的OutputStream首先被包裝成GZIPOutputStream，然后又被包裝成ObjectOutputStream，如下：

package com.googlecode.garbagecan.test.socket.sample4;import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.net.ServerSocket; import java.net.Socket; import java.util.logging.Level; import java.util.logging.Logger; import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream;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();socket.setSoTimeout(10 * 1000);invoke(socket);}}private static void invoke(final Socket socket) throws IOException {new Thread(new Runnable() {public void run() {GZIPInputStream gzipis = null;ObjectInputStream ois = null;GZIPOutputStream gzipos = null;ObjectOutputStream oos = null;try {gzipis = new GZIPInputStream(socket.getInputStream());ois = new ObjectInputStream(gzipis);gzipos = new GZIPOutputStream(socket.getOutputStream());oos = new ObjectOutputStream(gzipos);Object obj = ois.readObject();User user = (User)obj;System.out.println("user: " + user.getName() + "/" + user.getPassword());user.setName(user.getName() + "_new");user.setPassword(user.getPassword() + "_new");oos.writeObject(user);oos.flush();gzipos.finish();} catch (IOException ex) {logger.log(Level.SEVERE, null, ex);} catch(ClassNotFoundException ex) {logger.log(Level.SEVERE, null, ex);} finally {try {ois.close();} catch(Exception ex) {}try {oos.close();} catch(Exception ex) {}try {socket.close();} catch(Exception ex) {}}}}).start();} }Client也和Server端類似，同樣要不socket的XXXStream包裝成GZIPXXXStream，然后再包裝成ObjectXXXStream，如下：

package com.googlecode.garbagecan.test.socket.sample4;import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.net.InetSocketAddress; import java.net.Socket; import java.net.SocketAddress; import java.util.logging.Level; import java.util.logging.Logger; import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream;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 < 10; i++) {Socket socket = null;GZIPOutputStream gzipos = null;ObjectOutputStream oos = null;GZIPInputStream gzipis = null;ObjectInputStream ois = null;try {socket = new Socket();SocketAddress socketAddress = new InetSocketAddress("localhost", 10000); socket.connect(socketAddress, 10 * 1000);socket.setSoTimeout(10 * 1000);gzipos = new GZIPOutputStream(socket.getOutputStream());oos = new ObjectOutputStream(gzipos);User user = new User("user_" + i, "password_" + i);oos.writeObject(user);oos.flush();gzipos.finish();gzipis = new GZIPInputStream(socket.getInputStream());ois = new ObjectInputStream(gzipis);Object obj = ois.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 {ois.close();} catch(Exception ex) {}try {oos.close();} catch(Exception ex) {}try {socket.close();} catch(Exception ex) {}}}} }

最后測試上面的代碼，首先運行Server類，然后運行Client類，就可以分別在Server端和Client端控制臺看到接收到的User對象實例了。

轉(zhuǎn)載于:https://my.oschina.net/baochanghong/blog/423127

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