java socket长连接服务端

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java socket长连接服务端的实现

网络编程都是最底层都是基于socket的，鉴于客户端需要一直发送消息，使用短连接就不适合了，因为建立socket连接后发送完数据又马上断开连接。而长连接通过客户端的心跳机制一直保持连接，不管当前是否接收和发送数据。长连接服务端代码如下：

package com.starit.ipran.socket;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.ServerSocket;import java.net.Socket;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.starit.ipran.kafka.KafkaUtils;import com.starit.ipran.load.Constants;import com.starit.ipran.model.IpranAlarm;import com.starit.ipran.util.EncodeUtils;public class SocketServer {private final static Logger LOGGER = LoggerFactory.getLogger(SocketServer.class);       public void startAction(){          ServerSocket serverSocket=null;          try {              serverSocket=new ServerSocket(Constants.SOCKET_PORT);  //端口号            LOGGER.info("服务端服务启动监听：");            //通过死循环开启长连接，开启线程去处理消息            while(true){                  Socket socket=serverSocket.accept();                  new Thread(new MyRuns(socket)).start();              }          } catch (Exception e) {              e.printStackTrace();          } finally {              try {                  if (serverSocket!=null) {                      serverSocket.close();                  }              } catch (Exception e2) {                  e2.printStackTrace();              }          }      }            class MyRuns implements Runnable{                  Socket socket;          BufferedReader reader;          BufferedWriter writer;            public MyRuns(Socket socket) {              super();              this.socket = socket;          }            public void run() {              try {                  reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));//读取客户端消息                  writer=new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));//向客户端写消息                String lineString="";                                 while(!(lineString=reader.readLine()).equals("bye")){                LOGGER.info("收到来自客户端的发送的消息是：" + lineString);                    writer.write("服务器返回："+lineString+"\n");                      writer.flush();                  }              } catch (Exception e) {                  e.printStackTrace();              } finally {                  try {                      if (reader!=null) {                          reader.close();                      }                      if (writer!=null) {                          writer.close();                      }                      if (socket!=null) {                          socket.close();                      }                  } catch (Exception e2) {                      e2.printStackTrace();                  }              }          }                }  }

下面是客户端程序：

package www.socket.test;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.Socket;public class Client {public static void main(String[] args) {  Client client=new Client();  client.startAction();      }            void readSocketInfo(BufferedReader reader){          new Thread(new MyRuns(reader)).start();      }            class MyRuns implements Runnable{                    BufferedReader reader;                    public MyRuns(BufferedReader reader) {              super();              this.reader = reader;          }            public void run() {              try {                  String lineString="";                  while( (lineString = reader.readLine())!=null ){                      System.out.println(lineString);                  }              } catch (Exception e) {                  e.printStackTrace();              }          }                }            public void startAction(){          Socket socket=null;          BufferedReader reader=null;          BufferedWriter writer=null;          BufferedReader reader2=null;          try {              socket=new Socket("127.0.0.1", 10000);              reader = new BufferedReader(new InputStreamReader(System.in));              reader2=new BufferedReader(new InputStreamReader(socket.getInputStream()));              writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));              readSocketInfo(reader2);              String lineString="";              while(!(lineString=reader.readLine()).equals("exit")){                  writer.write(lineString+"\n");                  writer.flush();              }          } catch (Exception e) {              e.printStackTrace();          } finally {              try {                  if (reader!=null) {                      reader.close();                  }                  if (writer!=null) {                      writer.close();                  }                  if (socket!=null) {                      socket.close();                  }              } catch (Exception e2) {                  e2.printStackTrace();              }          }      }  }

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