Java http請求保存圖片至本地

package com.chachaba.info.service;
import java.io.ByteArrayOutputStream;  
import java.io.File;  
import java.io.FileOutputStream;  
import java.io.InputStream;  
import java.net.HttpURLConnection;  
import java.net.URL;  
public class ImageRequest {  
    /** 
     * @param args 
     */  
    public static void main(String[] args) throws Exception {  
        int one=1;
        int two=1;
        while(true){
        
        //new一個URL對象  
        URL url = new URL("http://sv3.map.soso.com/tile?svid=10143701130223133351200&x="+one+"&y="+two+"&from=web&level=1&v=2");  
        //打開鏈接  
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();  
        //設置請求方式爲"GET"  
        conn.setRequestMethod("GET");  
        //超時響應時間爲5秒  
       // conn.setConnectTimeout(5 * 1000);  
        //通過輸入流獲取圖片數據  
        InputStream inStream=null;
        try{
          inStream = conn.getInputStream();  
        }catch (Exception e) {
               System.out.println("Error"+one+","+two);
            System.out.println("///");
            if(two==20){
                one++;
                two=1;
            }else{
                two++;
            }
            if(one==21){
                return;
            }
            continue;
        }
        //得到圖片的二進制數據，以二進制封裝得到數據，具有通用性  
        byte[] data = readInputStream(inStream);  
        //new一個文件對象用來保存圖片，默認保存當前工程根目錄  
        File imageFile = new File(one+","+two+".jpg");  
        System.out.println(one+","+two);
        //創建輸出流  
        FileOutputStream outStream = new FileOutputStream(imageFile);  
        //寫入數據  
        outStream.write(data);  
        //關閉輸出流  
        outStream.close();  
        
        if(two==20){
            one++;
            two=1;
        }else{
            two++;
        }
        if(one==20){
            return;
        }
        
        }
        
    }  
    public static byte[] readInputStream(InputStream inStream) throws Exception{  
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();  
        //創建一個Buffer字符串  
        byte[] buffer = new byte[1024];  
        //每次讀取的字符串長度，如果爲-1，代表全部讀取完畢  
        int len = 0;  
        //使用一個輸入流從buffer裏把數據讀取出來  
        while( (len=inStream.read(buffer)) != -1 ){  
            //用輸出流往buffer裏寫入數據，中間參數代表從哪個位置開始讀，len代表讀取的長度  
            outStream.write(buffer, 0, len);  
        }  
        //關閉輸入流  
        inStream.close();  
        //把outStream裏的數據寫入內存  
        return outStream.toByteArray();  
    }  
}