拿来主义：java中socket和serversocket 的用法

public class Server {

public static void main(String[] args) {

Socket socket=null;

BufferedReader br=null;

PrintWriter pw=null;

try {

//创建服务器,并开放3081端口

ServerSocket server=new ServerSocket(3081);

while(true){

//监听服务器端口，一旦有数据发送过来，那么就将数据封装成socket对象

//如果没有数据发送过来，那么这时处于线程阻塞状态，不会向下继续执行

socket=server.accept();

System.out.println("客户端信息："+socket.getRemoteSocketAddress());

//从socket中得到读取流，该流中有客户端发送过来的数据

InputStream in=socket.getInputStream();

//InputStreamReader将字节流转化为字符流

br=new BufferedReader(new InputStreamReader(in));

//行读取客户端数据

String info=br.readLine();

System.out.println(info);

OutputStream out=socket.getOutputStream();

pw=new PrintWriter(out);

pw.println("服务器说：我扁死你");

pw.flush();

}

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}finally{

try {

pw.close();

br.close();

socket.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

public class Client {

public static void main(String[] args) {

Socket socket=null;

PrintWriter pw=null;

BufferedReader br=null;

try {

//创建socket对象，并指明服务器的IP地址和端口号

socket=new Socket("localhost",3081);

//得到socket发送数据的输出流

OutputStream out=socket.getOutputStream();

//将字节流包装成字符流

pw=new PrintWriter(out);

//向服务器发送数据

pw.println("客户端说：建军闷烧");

//刷新流，确保数据能写到服务器

pw.flush();

InputStream in=socket.getInputStream();

br=new BufferedReader(new InputStreamReader(in));

String info=br.readLine();

System.out.println(info);

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

finally{

try {

pw.close();

socket.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}