fileget.java

java做的下载工具

import java.io.*;
import java.net.*;
import javax.swing.*;
public class FileGet extends Thread{
	String sourceFile;
	String objName;
        int code;
        long startPos,stopPos;
//	long nStart=0;//
//	long nStop;//
	DownLoad dl;
	//Reload rl;
	URL url;
        int num;
	HttpURLConnection con;
	//JProgressBar pb;
	InputStream input;
	public FileGet(String sourceFile,String objName,long startPos,long stopPos,int num){
		this.sourceFile=sourceFile;
		this.objName=objName;
                this.num=num;
                this.startPos=startPos;
                this.stopPos=stopPos;
		//pb=javaants.getProgressBar();
		//pb.setMinimum(0);
		try{
                  //rl=new Reload(Utility.getTempFileName()+"."+"tmp");
		  //rl.serializeIn();
	          dl=new DownLoad(objName,startPos);
	        url=new URL(sourceFile);
				String p="bytes="+startPos+"-";
				con=(HttpURLConnection)url.openConnection();
				
				con.setRequestProperty("GET","HTTP/1.1");
				con.setRequestProperty("User-Agent","xdj");
				con.setRequestProperty("Accept","*/*");
				con.setRequestProperty("Accept-Language","zh-cn");
				con.setRequestProperty("Accept-Encoding","gzip,defate");
				con.setRequestProperty("Connection","Keep-Alive");
				
				con.setRequestProperty("RANGE",p);
			    
				//Utility.nStop=con.getContentLength();
                   
                                code=con.getResponseCode();
				//pb.setMaximum((int)(Utility.nStop+Utility.nStart));	

System.out.println("startPos:"+Utility.nStart[num]);//

System.out.println("code:"+code);

	//			Utility.nStop+=Utility.nStart;
			    //System.out.println("nStop:"+Utility.nStop);//
		input=con.getInputStream();
	     }catch(Exception e){
	     	e.printStackTrace();
	     }
	}
	public void run(){
		//while(nStart <= nStop){
			
			try{
				
				byte[] b=new byte[1024];
				int nRead;
				while(((nRead=input.read(b,0,1024))>0) && (startPos<stopPos) && (!Utility.stop)){
					startPos+=dl.write(b,0,nRead);
					
				}
	Utility.nStart[num]=startPos;
        Utility.nStop[num]=stopPos;			    
	Utility.bStop[num]=true;
        System.out.println("Utility.bStop"+num+":"+Utility.bStop[num]);
			    dl.close();
			    
			}catch(Exception e){
                                Utility.nStart[num]=startPos;
                                Utility.nStop[num]=stopPos;		 	                Utility.bStop[num]=true;
                               // javaants.setStopFalse();
                               // javaants.setStartTrue();
                                Utility.bStop[num]=true;
        System.out.println("In Exception Utility.bStop"+num+":"+Utility.bStop[num]);
				e.printStackTrace();
			}
		//	System.out.println("nStart:"+Utility.nStart);
		//}
		
	}
}