java网络编程Socket（基础）demo

package l_5_Sokect_client; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.InetAddress; import java.net.Socket; /*** * 客户端 * * @author lambert_lei * */ public class Client { private static final String host = "127.0.0.1"; private static final int port = 9089; public static void main(String[] args) { // TODO Auto-generated method stub Socket socket = null; PrintWriter os = null; BufferedReader br=null; try { // 实例化一个Socket套接字，向IP为127.0.0.1 端口为9086的机子发起会话 socket = new Socket(host, port); // 实例化一个消息读取线程 new ClientreadMsg(socket).start(); // os = new PrintWriter(socket.getOutputStream()); os=new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()))); // 由Socket对象得到输入流，并构造相应的BufferedReader对象 // 由系统标准输入设备构造BufferedReader对象 字符读取 //InputStreamReader 把字节流转成字符流 br = new BufferedReader(new InputStreamReader(System.in)); String readline; while (true) { readline=br.readLine(); if (!readline.equalsIgnoreCase("bye")) { // 若从标准输入读入的字符串为 "yes"则停止循环 // 将从系统标准输入读入的字符串输出到Server os.println(readline); // 刷新输出流，使Server马上收到该字符串 os.flush(); System.out.println("（提示：客户端发送到服务器的消息发送成功！正在等待服务器返回消息，请稍候....）"); }else{ break; } } } catch (Exception e) { System.out.print(e.toString()); } finally { System.out.println("关闭"); try { os.close(); // 关闭Socket输出流 br.close(); // 关闭Socket输入流 socket.close(); // 关闭Socket } catch (Exception e) { } } } private void test_inteaddress(){ try{ InetAddress addr = InetAddress.getByName("www.baidu.com"); String domainName = addr.getHostName();//获得主机名 String IPName = addr.getHostAddress();//获得IP地址 System.out.println(domainName); System.out.println(IPName); }catch(Exception e){ } } }