Java Socket中怎樣傳輸壓縮對象

這篇文章將為大家詳細講解有關Java Socket中怎樣傳輸壓縮對象，文章內容質量較高，因此小編分享給大家做個參考，希望大家閱讀完這篇文章后對相關知識有一定的了解。

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絡環境不好或者對象比較大的情況下需要把數據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);              }              try {                  oos.close();              } catch (IOException e) {              }              try {                  ois.close();              } catch (IOException e) {              }              try {                  socket.close();              } catch (IOException e) {              }          }      }  }

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。

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