Java网络编程总结

flatfish2000

1.TCPServer.java
import java.net.*;import java.io.*;public class TCPServer {public static void main(String[] args) throws Exception {ServerSocket ss = new ServerSocket(6666);while(true) {Socket s = ss.accept();System.out.println("a client connect!");DataInputStream dis = new DataInputStream(s.getInputStream());System.out.println(dis.readUTF());dis.close();s.close();}}}
2.TCPClient.java
import java.net.*;import java.io.*;public class TCPClient {public static void main(String[] args) throws Exception {Socket s = new Socket("127.0.0.1", 6666);OutputStream os = s.getOutputStream();DataOutputStream dos = new DataOutputStream(os);//Thread.sleep(30000);dos.writeUTF("hello server!");dos.flush();dos.close();s.close();}}
3.客户端、服务器端单向通信
TestServer.java
/*范例名称：简单的client/server程序 * 源文件名称：TestClient.java/TestServer.java *要  点： *1. Java Socket编程步骤 *2. Socket/ServerSocket类用法 *3. 通过Socket对象可以获取通信对方Socket的信息 */import java.net.*;import java.io.*;public class TestServer {public static void main(String args[]) {try {ServerSocket s = new ServerSocket(8888);while (true) {Socket s1 = s.accept();OutputStream os = s1.getOutputStream();DataOutputStream dos = new DataOutputStream(os);dos.writeUTF("Hello," + s1.getInetAddress() + "port#" +s1.getPort() + "  bye-bye!");dos.close();s1.close();}}catch (IOException e) {e.printStackTrace();System.out.println("程序运行出错:" + e);}}}

TestClient.java
/*范例名称：简单的client/server程序 * 源文件名称：TestClient.java/TestServer.java *要  点： *1. Java Socket编程步骤 *2. Socket/ServerSocket类用法 *3. 通过Socket对象可以获取通信对方Socket的信息 */import java.net.*;import java.io.*;public class TestClient {public static void main(String args[]) {try {Socket s1 = new Socket("127.0.0.1", 8888);InputStream is = s1.getInputStream();DataInputStream dis = new DataInputStream(is);System.out.println(dis.readUTF());dis.close();s1.close();} catch (ConnectException connExc) {connExc.printStackTrace();System.err.println("服务器连接失败！");} catch (IOException e) {e.printStackTrace();}}}
4.客户端服务器端双向通信
TestSockServer.java
import java.io.*; import java.net.*;public class TestSockServer {  public static void main(String[] args) {    InputStream in = null;     OutputStream out = null;    try {      ServerSocket ss = new ServerSocket(5888);      Socket socket = ss.accept();      in = socket.getInputStream();       out = socket.getOutputStream();      DataOutputStream dos = new DataOutputStream(out);      DataInputStream dis = new DataInputStream(in);      String s = null;      if((s=dis.readUTF())!=null) {      System.out.println(s);      System.out.println("from: "+socket.getInetAddress());      System.out.println("Port: "+socket.getPort());    }      dos.writeUTF("hi，hello");       dis.close();      dos.close();      socket.close();    } catch (IOException e) {e.printStackTrace();}  }}

TestSockClient.java
import java.net.*;import java.io.*;public class TestSockClient {  public static void main(String[] args) {    InputStream is = null; OutputStream os = null;    try {      Socket socket = new Socket("localhost",5888);      is = socket.getInputStream();      os = socket.getOutputStream();      DataInputStream dis = new DataInputStream(is);      DataOutputStream dos = new DataOutputStream(os);      dos.writeUTF("hey");       String s = null;      if((s=dis.readUTF())!=null);      System.out.println(s);       dos.close();      dis.close();      socket.close();    } catch (UnknownHostException e) {       e.printStackTrace();    } catch (IOException e) {e.printStackTrace();}  }}