TCP程序设计(单线程服务器和多线程服务器学习)

/********下面是单线程服务器的服务器端*********/

package serverSocket;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

/***
* TCP程序设计：
* java中使用套接字完成TCP程序的开发,特点：可靠、双向、持续、点对点
* 对java的网络程序来说，每一个客户端都是一个socket对象;
* serverSocket编程服务器端：
* 注意：该为单线程服务器,即一个客户连接进入之后,其他客户只能在等待,连接不进去的.
* 注意：该种服务器设置,不适合聊天软件的开发,因为必须等待连接进入,会占用大量资源.
* @author Administrator
*
*/
public class EchoServer {
public static void main(String[] args) throws Exception{
ServerSocket server = null;
Socket client = null;
PrintStream out = null;
BufferedReader buf = null;
server = new ServerSocket(8888);
while(true){
System.out.println("服务器运行,等待客户连接中......");
client = server.accept();//排队等待客户端接入
buf = new BufferedReader(
new InputStreamReader(client.getInputStream()));
out = new PrintStream(client.getOutputStream());

boolean flag = true;
while(flag){
String str = buf.readLine();
if(str == null || "".equals(str)){
flag = false;
}else{
if("bye".equals(str)){
flag = false;
}else{
out.println("ECHO: " + str);
}
}
}
buf.close();
out.close();
client.close();
}
}
}

/********下面是单线程服务器的客户端*********/

package serverSocket;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
/***
* socket通信客户端：
* 关键：
* 1、input：控制台输入流,
* 2、out：向服务器输出流,
* 3、buf：读取返回信息流
* @author Administrator
*
*/
public class EchoClient {
public static void main(String[] args) throws Exception{
Socket client = null;
client = new Socket("localhost",8888);//连接编程,
BufferedReader buf = null;
PrintStream out = null;
BufferedReader input = null;

input = new BufferedReader(//输入流：接受从控制台输入的信息,
new InputStreamReader(System.in));
out = new PrintStream(client.getOutputStream());//输出流：打开向服务器输出的流
buf = new BufferedReader(//输入流：接受从服务器返回的信息,
new InputStreamReader(client.getInputStream()));

boolean flag = true;
while(flag){
System.out.println("输入信息： ");
String line = input.readLine();
out.println(line);
if("bye".equals(line)){
flag = false;
}else{
String echo = buf.readLine();//获取服务器返回信息,
System.out.println(echo);
}
}
client.close();
buf.close();
out.close();
input.close();
}
}

/********下面是多线程服务器测试*********/

package serverSocket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
/***
* 多线程服务器：
* 原理：每当接入一客户,就另起一线程,将回复信息的任务交给了线程处理,
* 注意：该种服务器设置,不适合聊天软件的开发,因为必须等待连接进入,会占用大量资源.
* @author Administrator
*
*/
public class EchoThreadServer {
public static void main(String[] args)throws Exception {
ServerSocket server = null;
Socket client = null;
server = new ServerSocket(8888);
boolean flag = true;
while(flag){
System.out.println("服务器正在运行,等待客户连接......");
client = server.accept();
new Thread(new EchoThread(client)).start();
//server.close();
}
}
}
/***
* 每一客户接入,都新创建一线程,打开输入流,输出流,处理信息
* @author Administrator
*
*/
class EchoThread implements Runnable{
private Socket client = null;
public EchoThread(Socket client) {
this.client = client;
}
@Override
public void run(){
PrintStream out = null;
BufferedReader buf = null;

try {
out = new PrintStream(client.getOutputStream());//打开输出流
buf = new BufferedReader(new InputStreamReader(client.getInputStream()));//打开输入流

boolean flag = true;
while(flag){
String line = buf.readLine();
if(line == null || "".equals(line)){
flag = false;
}else{
if("bye".equals(line)){
flag = false;
}else{
out.println("Echo: " + line);
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally{
try {
out.close();
buf.close();
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
*******************************************************经测试通过，只为交流学习************************

评论

1 楼 beyond0851 2013-01-27  

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