java socket 通信第二讲(多对一)

来源：互联网发布：java socket怎么运行编辑：程序博客网时间：2024/05/20 06:37

1.多线程启动服务接受多个客户端

public class Server {    public static void main(String args[]) throws IOException {      //为了简单起见，所有的异常信息都往外抛     int port = 8899;      //定义一个ServerSocket监听在端口8899上     ServerSocket server = new ServerSocket(port);      while (true) {         //server尝试接收其他Socket的连接请求，server的accept方法是阻塞式的       Socket socket = server.accept();         //跟客户端建立好连接之后，我们就可以获取socket的InputStream，并从中读取客户端发过来的信息了。       Reader reader = new InputStreamReader(socket.getInputStream());         char chars[] = new char[64];         int len;         StringBuilder sb = new StringBuilder();         String temp;         int index;         while ((len=reader.read(chars)) != -1) {            temp = new String(chars, 0, len);            if ((index = temp.indexOf("eof")) != -1) {//遇到eof时就结束接收                sb.append(temp.substring(0, index));                break;            }            sb.append(temp);         }         System.out.println("from client: " + sb);         //读完后写一句       Writer writer = new OutputStreamWriter(socket.getOutputStream());         writer.write("Hello Client.");         writer.flush();         writer.close();         reader.close();         socket.close();      }   }   }

public class Client {   public static void main(String args[]) throws Exception {      //为了简单起见，所有的异常都直接往外抛     String host = "127.0.0.1";  //要连接的服务端IP地址     int port = 8899;   //要连接的服务端对应的监听端口     //与服务端建立连接     Socket client = new Socket(host, port);      //建立连接后就可以往服务端写数据了     Writer writer = new OutputStreamWriter(client.getOutputStream());      writer.write("Hello Server.");      writer.write("eof\n");      writer.flush();      //写完以后进行读操作     BufferedReader br = new BufferedReader(new InputStreamReader(client.getInputStream()));      StringBuffer sb = new StringBuffer();      String temp;      int index;      while ((temp=br.readLine()) != null) {         if ((index = temp.indexOf("eof")) != -1) {            sb.append(temp.substring(0, index));            break;         }         sb.append(temp);      }      System.out.println("from server: " + sb);      writer.close();      br.close();      client.close();   }}

2.设置超时时间

public class Client {    public static void main(String args[]) throws Exception {      //为了简单起见，所有的异常都直接往外抛     String host = "127.0.0.1";  //要连接的服务端IP地址     int port = 8899;   //要连接的服务端对应的监听端口     //与服务端建立连接     Socket client = new Socket(host, port);      //建立连接后就可以往服务端写数据了     Writer writer = new OutputStreamWriter(client.getOutputStream());      writer.write("Hello Server.");      writer.write("eof\n");      writer.flush();      //写完以后进行读操作     BufferedReader br = new BufferedReader(new InputStreamReader(client.getInputStream()));      //设置超时间为10秒     client.setSoTimeout(10*1000);      StringBuffer sb = new StringBuffer();      String temp;      int index;      try {         while ((temp=br.readLine()) != null) {            if ((index = temp.indexOf("eof")) != -1) {                sb.append(temp.substring(0, index));                break;            }            sb.append(temp);         }      } catch (SocketTimeoutException e) {         System.out.println("数据读取超时。");      }      System.out.println("from server: " + sb);      writer.close();      br.close();      client.close();   }} 3.接受数据乱码<pre name="code" class="html">public class Server {    public static void main(String args[]) throws IOException {      //为了简单起见，所有的异常信息都往外抛      int port = 8899;      //定义一个ServerSocket监听在端口8899上      ServerSocket server = new ServerSocket(port);      while (true) {         //server尝试接收其他Socket的连接请求，server的accept方法是阻塞式的         Socket socket = server.accept();         //每接收到一个Socket就建立一个新的线程来处理它         new Thread(new Task(socket)).start();      }   }      /**    * 用来处理Socket请求的    */   static class Task implements Runnable {       private Socket socket;            public Task(Socket socket) {         this.socket = socket;      }            public void run() {         try {            handleSocket();         } catch (Exception e) {            e.printStackTrace();         }      }            /**       * 跟客户端Socket进行通信      * @throws Exception       */      private void handleSocket() throws Exception {         BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "GBK"));         StringBuilder sb = new StringBuilder();         String temp;         int index;         while ((temp=br.readLine()) != null) {            System.out.println(temp);            if ((index = temp.indexOf("eof")) != -1) {//遇到eof时就结束接收             sb.append(temp.substring(0, index));                break;            }            sb.append(temp);         }         System.out.println("客户端: " + sb);         //读完后写一句       Writer writer = new OutputStreamWriter(socket.getOutputStream(), "UTF-8");         writer.write("你好，客户端。");         writer.write("eof\n");         writer.flush();         writer.close();         br.close();         socket.close();      }   }}

public class Client {    public static void main(String args[]) throws Exception {      //为了简单起见，所有的异常都直接往外抛     String host = "127.0.0.1";  //要连接的服务端IP地址     int port = 8899;   //要连接的服务端对应的监听端口     //与服务端建立连接     Socket client = new Socket(host, port);      //建立连接后就可以往服务端写数据了     Writer writer = new OutputStreamWriter(client.getOutputStream(), "GBK");      writer.write("你好，服务端。");      writer.write("eof\n");      writer.flush();      //写完以后进行读操作     BufferedReader br = new BufferedReader(new InputStreamReader(client.getInputStream(), "UTF-8"));      //设置超时间为10秒     client.setSoTimeout(10*1000);      StringBuffer sb = new StringBuffer();      String temp;      int index;      try {         while ((temp=br.readLine()) != null) {            if ((index = temp.indexOf("eof")) != -1) {                sb.append(temp.substring(0, index));                break;            }            sb.append(temp);         }      } catch (SocketTimeoutException e) {         System.out.println("数据读取超时。");      }      System.out.println("服务端: " + sb);      writer.close();      br.close();      client.close();   }}

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