用socket进行通信是服务器与客户端的互发信息

《此代码是总结出点简单的socket通讯的应用》

import java.io.BufferedReader;

1. List item

import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class ServerSocketDemo {
*/

• 1.创建服务器端serversocker对象，指明服务器端口
• 2.接受客户端的请求，创建socket对象
• 3.获取socket的输入流
• 4.读取数据
• 5.关闭输入流
• /**
  public static void main(String[] args) {
  // TODO Auto-generated method stub
  try {
  ServerSocket ss=new ServerSocket(8080);
  System.out.println(“服务器启动”);
  Socket socket=ss.accept();
  System.out.println(“服务器已建立链接”);
  //创建输入流，读取客户端发来的信息
  InputStream in=socket.getInputStream();
  OutputStream out=socket.getOutputStream();

/* BufferedReader reader=new BufferedReader(new InputStreamReader(in,“utf-8”));
String msg1=reader.readLine(); System.out.println(“客户端发送的信息”+msg1);
*/

DataInputStream dis=new DataInputStream(in);
//DataInputStream dis=new DataInputStream(socket.getInputStream());
String echo=dis.readUTF();
System.out.println("客户端发送的信息"+echo);

 
  
 //向客户端发送信息
 String msg="no hello wold";
 
/*
  PrintWriter writer= new PrintWriter(new BufferedWriter(new OutputStreamWriter(out,"utf-8")));
  writer.println(msg);
  writer.flush();
 */
  /* writer.close();//
  reader.close();
in.close();*/

 DataOutputStream dos=new DataOutputStream(out);
 dos.writeUTF(msg);
 dos.flush();

// out.flush();
// out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

2. List item
   import java.io.BufferedReader;
   import java.io.BufferedWriter;
   import java.io.DataInputStream;
   import java.io.DataOutputStream;
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.InputStreamReader;
   import java.io.OutputStream;
   import java.io.OutputStreamWriter;
   import java.io.PrintWriter;
   import java.net.Socket;
   import java.net.UnknownHostException;

public class ClientSocketDemo {
/**

• 1.创建客户端Socket对象，指明服务器的地址和端口号

• 2.获取Socket的输出流

• 3.写出数据

• 4.关闭输出流

• 要点：：DataOutputStream数据输出流允许应用程序以适当方式将基本 Java 数据类型写入输出流中。然后，应用程序可以使用数据输入流将数据读入。

• @author jf

• */
  public static void main(String[] args) {
  // TODO Auto-generated method stub
  try {
  //向服务器发送信息
  //1.创建客户端Socket对象，指明服务器的地址和端口号
  //Socket(InetAddress address, int port)

  Socket socket=new Socket(“127.0.0.1”,8080);
  String msg=“hello world”;
  //2.获取Socket的输出流
  OutputStream out=socket.getOutputStream();
  InputStream in=socket.getInputStream();

  //3.写出数据 OutputStreamWriter(OutputStream out, Charset cs（格式）)
  /PrintWriter writer= new PrintWriter(new BufferedWriter(new OutputStreamWriter(out,“utf-8”)));
  writer.println(msg);
  writer.flush();/

  DataOutputStream dos=new DataOutputStream(out);
  dos.writeUTF(msg);// 以与机器无关方式使用 UTF-8 修改版编码将一个字符串写入基础输出流。
  dos.flush();

  //接收服务器发送的信息
  /* BufferedReader reader=new BufferedReader(new InputStreamReader(in,“utf-8”));
  String msg1=reader.readLine();//阻塞式方法
  System.out.println(“服务器发送的信息是：”+msg1);/
  //4.关闭输出流
  / reader.close();*/

  DataInputStream dis=new DataInputStream(in);
  String echo=dis.readUTF();
  System.out.println(“服务器发送的信息是：”+echo);
  dis.close();
  dos.close();

// in.close();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}
_{先运行服务端再运行客户端}~
还可以进行控制台输入
BufferedReader console=new BufferedReader(new InputStreamReader(System.in));
String info=console.readLine();
dos.writerUTF(info);