javaSocket编程ＴＣＰ

主题为：javaSocket编程ＴＣＰ

原地址：http://www.iteye.com/topic/630748

 

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java Socket通信的学习笔记三
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Java综合

写了一个javaSocket通信的例子，比较容易懂，主要是TCP协议的。下面是服务端的代码

Java代码

1. import java.io.IOException;
2. import java.net.InetAddress;
3. import java.net.Socket;
5. public class ServerSocket {
7. public staticvoid main(String[] args) {
8. beginSocket();
9. }
11. public staticvoid beginSocket(){
12. try {
13. java.net.ServerSocket serverSocket=new java.net.ServerSocket(3456);
14. InetAddress inta=serverSocket.getInetAddress().getLocalHost();
15. System.out.println(inta.getHostAddress());
16. while(true){
17. Socket socket=serverSocket.accept();
18. new HelloMessage(socket);
19. }
20. } catch (IOException e) {
21. e.printStackTrace();
22. }
23. }
24. }

import java.io.IOException;import java.net.InetAddress;import java.net.Socket;public class ServerSocket {public static void main(String[] args) {beginSocket();}public static void beginSocket(){try {java.net.ServerSocket serverSocket=new java.net.ServerSocket(3456);InetAddress inta=serverSocket.getInetAddress().getLocalHost();System.out.println(inta.getHostAddress());while(true){Socket socket=serverSocket.accept();new HelloMessage(socket);}} catch (IOException e) {e.printStackTrace();}}}

为了提高并发时的处理效率，对于每个请求，系统都新建一个线程处理。

Java代码

1. import java.io.BufferedReader;
2. import java.io.InputStreamReader;
3. import java.io.PrintWriter;
4. import java.net.Socket;
6. public class HelloMessageextends Thread {
7. private Socket socket_ = null;
8. public HelloMessage(Socket socket) {
9. this.socket_ = socket;
10. this.start();
11. }
13. public void run() {
14. try {
15. BufferedReader bReader = new BufferedReader(new InputStreamReader(
16. this.socket_.getInputStream()));
17. PrintWriter pWriter = new PrintWriter(this.socket_
18. .getOutputStream());
19. String requestStr = bReader.readLine();
20. if (requestStr != null && !"".equals(requestStr)) {
21. if (requestStr.equals("java")) {
22. pWriter.println("your write is java");
23. }
24. if (requestStr.equals(".net")) {
25. pWriter.println("your write is .net");
26. }
27. if (requestStr.equals("php")) {
28. pWriter.println("your write is php");
29. }
30. if (requestStr.equals("end")) {
31. pWriter.println("your write is end");
33. }else{
34. pWriter.println("your write is other");
35. }
36. }else{
37. pWriter.println("your write is null");
38. }
39. pWriter.flush();
40. pWriter.close();
41. bReader.close();
42. this.socket_.close();
43. } catch (Exception e) {
44. e.printStackTrace();
45. }
47. }
48. }

import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;public class HelloMessage extends Thread {private Socket socket_ = null;public HelloMessage(Socket socket) {this.socket_ = socket;this.start();}public void run() {try {BufferedReader bReader = new BufferedReader(new InputStreamReader(this.socket_.getInputStream()));PrintWriter pWriter = new PrintWriter(this.socket_.getOutputStream());String requestStr = bReader.readLine();if (requestStr != null && !"".equals(requestStr)) {if (requestStr.equals("java")) {pWriter.println("your write is java");}if (requestStr.equals(".net")) {pWriter.println("your write is .net");}if (requestStr.equals("php")) {pWriter.println("your write is php");}if (requestStr.equals("end")) {pWriter.println("your write is end");}else{pWriter.println("your write is other");}}else{pWriter.println("your write is null");}pWriter.flush();pWriter.close();bReader.close();this.socket_.close();} catch (Exception e) {e.printStackTrace();}}}

然后是客户端的代码。

Java代码

1. import java.io.BufferedReader;
2. import java.io.IOException;
3. import java.io.InputStreamReader;
4. import java.io.PrintWriter;
5. import java.net.Socket;
6. import java.net.UnknownHostException;
8. public class ClientSocket {
9. public staticvoid main(String[] args) {
10. clientRequest();
11. }
12. private staticvoid clientRequest() {
13. try {
14. while (true) {
15. Socket clientSocket = new Socket("172.168.4.105",3456);
16. BufferedReader bReader = new BufferedReader(new InputStreamReader(
17. System.in));
18. System.out.println("please input java or .net or php or end");
19. String strLine = bReader.readLine();
20. if (strLine != null && !"".equals(strLine)) {
21. PrintWriter pWriter = new PrintWriter(clientSocket
22. .getOutputStream(), true);
23. pWriter.println(strLine);
24. BufferedReader br = new BufferedReader(
25. new InputStreamReader(clientSocket.getInputStream()));
26. String strResult = br.readLine();
27. System.out.println(strResult);
29. pWriter.flush();
30. pWriter.close();
31. clientSocket.close();
32. }
33. }
34. } catch (UnknownHostException e) {
35. e.printStackTrace();
36. } catch (IOException e) {
37. e.printStackTrace();
38. }
39. }
40. }

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;import java.net.UnknownHostException;public class ClientSocket {public static void main(String[] args) {clientRequest();}private static void clientRequest() {try {while (true) {Socket clientSocket = new Socket("172.168.4.105", 3456);BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));System.out.println("please input java or .net or php or end");String strLine = bReader.readLine();if (strLine != null && !"".equals(strLine)) {PrintWriter pWriter = new PrintWriter(clientSocket.getOutputStream(), true);pWriter.println(strLine);BufferedReader br = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));String strResult = br.readLine();System.out.println(strResult);pWriter.flush();pWriter.close();clientSocket.close();}}} catch (UnknownHostException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}

这样一个简单的TCP，Socket编程的原型就成了。简单介绍下：

几个比较重要的ＡＰＩ

.Accept方法用于产生"阻塞"，直到接受到一个连接，并且返回一个客户端的Socket对象实例。

.getInputStream方法获得网络连接输入，同时返回一个IutputStream对象实例，。

.getOutputStream方法连接的另一端将得到输入，同时返回一个OutputStream对象实例。