用Java实现TCP通信

package pack; import java.net.*; import java.io.*; public class TCPServer { public static void main(String args[]) { try{ int serverPort=7896; ServerSocket listenSocket=new ServerSocket(serverPort); while(true) { Socket clientSocket=listenSocket.accept(); Connection c=new Connection(clientSocket); } } catch(IOException e){System.out.println("Listen:"+e.getMessage());} } } class Connection extends Thread { DataInputStream in; DataOutputStream out; Socket clientSocket; public Connection(Socket aClientSocket) { try{ clientSocket=aClientSocket; in=new DataInputStream(clientSocket.getInputStream()); out=new DataOutputStream(clientSocket.getOutputStream()); this.start(); } catch(IOException e) {System.out.println("Connection:"+e.getMessage());} } public void run() { try{ //一个回声伺候器 String data=in.readUTF(); out.writeUTF(data); } catch(EOFException e){System.out.println("EOF:"+e.getMessage());} catch(IOException e){System.out.println("IO:"+e.getMessage());} finally {try{clientSocket.close();} catch(IOException e){/*关闭失败*/}} } }