Java Socket中怎樣傳輸壓縮對象

這篇文章將為大家詳細(xì)講解有關(guān)Java Socket中怎樣傳輸壓縮對象，文章內(nèi)容質(zhì)量較高，因此小編分享給大家做個(gè)參考，希望大家閱讀完這篇文章后對相關(guān)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(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(jìn)行壓縮然后在傳輸，此時(shí)就需要壓縮這些對象流，此時(shí)就可以GZIPInputStream和GZIPOutputStream來處理一下socket的InputStream和OutputStream。

仍然需要一個(gè)實(shí)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);              }              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(yùn)行Server類，然后運(yùn)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(shí)例了。

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