import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;public class SocketServer {// 设置端口号public static int portNo = 8082;public static void main(String[] args) throws IOException {//1.创建socket服务端对象  ServerSocket s = new ServerSocket(portNo);System.out.println("The Server is start: " + s);// 2.阻塞,直到有客户端连接Socket socket = s.accept();try {System.out.println("Accept the Client: " + socket);//设置IO句柄//3.获取输入流准备取客户端发送的数据  BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));//PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);while (true) {String str = in.readLine();if (str.equals("byebye")) {break;}System.out.println("In Server reveived the info: " + str);//Writer向文本输出流打印对象的格式化表示形式。此类实现在 PrintStream 中的所有 print 方法。//它不包含用于写入原始字节的方法，对于这些字节，程序应该使用未编码的字节流进行写入//PrintWriter(OutputStream out)  根据现有的 OutputStream 创建不带自动行刷新的新 PrintWriter。//PrintWriter(Writer out)  创建不带自动行刷新的新 PrintWriter。//这两种构造方法。由于PrintWriter能够实现自动刷新所以又衍生出另两种：//PrintWriter(OutputStream out, boolean autoFlush)  //通过现有的 OutputStream 创建新的 PrintWriter。//PrintWriter(Writer out, boolean autoFlush)  创建新 PrintWriter//http://blog.csdn.net/zsw2zkl/article/details/7209734//4.接受客户端数据和写数据out.println(str);}} finally {System.out.println("close the Server socket and the io.");//5.释放资源 socket.close();s.close();}}}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;public class SocketClient {static String clientName = "Mike";//端口号public static int portNo = 8082;public static void main(String[] args) throws IOException {// 设置连接地址类,连接本地InetAddress addr = InetAddress.getByName("localhost");//1.创建客户端，绑定端口，IPSocket socket = new Socket(addr, portNo);try {System.out.println("socket = " + socket);//2.将服务端的数据打印出来  设置IO句柄BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));//3.向服务端发送数据PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);out.println("Hello Server,I am " + clientName);String str = in.readLine();System.out.println(str);out.println("byebye");} finally {System.out.println("close the Client socket and the io.");//4.释放资源 socket.close();}}}