serverthread.java

java编写的简单webserver服务器

package com.lm.webserver;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.*;
import java.net.*;
import java.util.StringTokenizer;



//服务器多线程类
public class ServerThread extends Thread{
	BufferedReader sin=null;
	DataOutputStream sout=null;
	Socket thsocket=null;
	String requestMessageLine;
	String fileName;
	StringTokenizer tokenizedLine;
	public ServerThread(Socket ps){
		thsocket=ps;
		try{
			sin=new BufferedReader(new InputStreamReader(thsocket.getInputStream()));
			sout=new DataOutputStream(thsocket.getOutputStream());
		}
		catch(IOException e){
			System.out.println("用户离开！");
		}
	}
	public void run(){
		while(true){
			try{
				requestMessageLine = sin.readLine();
				if(requestMessageLine!=null){
					//System.out.println ("请求信息行的内容是："+requestMessageLine);
					if(requestMessageLine.startsWith("GET")){
						tokenizedLine = new StringTokenizer(requestMessageLine);
						if(tokenizedLine.nextToken().equals("GET")){
						fileName = tokenizedLine.nextToken();
						if(fileName.startsWith("/")==true)
							fileName = fileName.substring(1);
						File file = new File(fileName);
						int numOfBytes = (int)file.length();
						FileInputStream inFile = new FileInputStream(fileName);
						byte[] fileInBytes = new byte[numOfBytes];
						inFile.read(fileInBytes);
						sout.writeBytes("HTTP/1.0 200 Document Follows\r\n");
						if(fileName.endsWith(".jpg"))
							sout.writeBytes("Content-Type:image/jpeg\r\n");
						if(fileName.endsWith(".gif"))
							sout.writeBytes("Content-type:image/gif\r\n");
						sout.writeBytes("Content-Length:"+numOfBytes+"\r\n");
						sout.writeBytes("\r\n");
						sout.write(fileInBytes,0,numOfBytes);
						}
					}
				}
				
				
				
			}catch(IOException e){
				try{
					this.sin.close();
					this.sout.close();
					this.thsocket.close();
				}                  
                catch(IOException eee){
                	System.out.println("异常离开");
                }
                break; 
			}	 
		}
	}
}