Java Socket实战之三 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：

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：

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：

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。