基于tcp的socket通信

服务器端：
package socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
public class SeverTest {
     public static void main(String[] args) throws IOException {
           // TODO Auto-generated method stub
           ServerSocket server = new ServerSocket(8888);
           Socket socket = server.accept();
           InputStream is = socket.getInputStream();
           InputStreamReader isr = new InputStreamReader(is);
           BufferedReader br = new BufferedReader(isr, 100);
           String b = null;
           while ((b = br.readLine()) != null) {
                System.out.println("我是服务器，请讲：" + b);
           }
           socket.shutdownInput();// 关闭输入流
           OutputStream os = socket.getOutputStream();
           PrintWriter pw = new PrintWriter(os);
           Scanner scanner = new Scanner(System.in);
           String s = "";
           while (!(s = scanner.nextLine()).equals("")) {
                pw.write(s);
           }
           pw.flush();
           pw.close();
           os.close();
           scanner.close();
           br.close();
           isr.close();
           is.close();
           socket.close();
           server.close();
     }
}


客户端：
package socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;
public class ClientTest {
     public static void main(String[] args) throws IOException {
           Socket socket = new Socket("localhost", 8888);
           OutputStream os = socket.getOutputStream();
           PrintWriter pw = new PrintWriter(os);
           Scanner scanner = new Scanner(System.in);
           String s = "";
           while (!(s = scanner.nextLine()).equals("")) {
                pw.write(s);
           }
           // pw.write("这里是客户端，我可以告诉你用户名和密码吗？");
           pw.flush();
           socket.shutdownOutput();// 关闭输出流
           InputStream is = socket.getInputStream();
           InputStreamReader isr = new InputStreamReader(is);
           BufferedReader br = new BufferedReader(isr, 100);
           String b = null;
           while ((b = br.readLine()) != null) {
                System.out.println(b);
           }
           scanner.close();
           br.close();
           isr.close();
           is.close();
           pw.flush();
           pw.close();
           os.close();
           socket.close();
     }
}

注意：
①在服务器端建立输入流，获取完输入流之后一定要把输入流关闭，否则无法进行后面的输出流操作。
②在客户端建立输出流，发送输出流之后一定要把输出流关闭，否则无法进入后面的输入流操作。