package common;

import java.io.File;

import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.MalformedURLException; import java.net.URL; /**  * 下载网络图片  * wanglizhi  * Jan 31, 2013  * 3:31:42 PM  */ public class FileUtil {

 /**

  * 下载网络图片   * @param strUrl   * @param fileName   * Jan 31, 2013   * wanglizhi   */  public static void writeFile(String strUrl,String fileName){          URL url = null;       try {        //构造URL地址           url = new URL(strUrl);       } catch (MalformedURLException e2) {           e2.printStackTrace();      }      InputStream is = null;      try {          is = url.openStream();      } catch (IOException e1) {          e1.printStackTrace();      }    OutputStream os = null;   

   File f = new File(System.getProperty("user.dir")+"\\image\\");

   if(!f.exists()){//判断文件夹是否存在     f.mkdirs();    }    try{     os = new FileOutputStream(System.getProperty("user.dir")+"\\image\\"+fileName);     int bytesRead = 0;     byte[] buffer = new byte[8192];         while((bytesRead = is.read(buffer,0,8192))!=-1){      os.write(buffer,0,bytesRead);     }    }catch(FileNotFoundException e){        } catch (IOException e) {     e.printStackTrace();    }   } }

 

//测试demo

package common;

import org.junit.Test;

/**  * 根据网络路径下载图片  * wanglizhi  * Jan 31, 2013  * 3:31:08 PM  */ public class DownloadFileDemo {      public void Test(){   FileUtil.writeFile("");  }   }