十五、从互联网获取图片且保存到指定目录

  

   package
    com.ljq.test;


   import
    java.io.File;

   import
    java.io.FileOutputStream;

   import
    java.io.InputStream;

   import
    java.net.HttpURLConnection;

   import
    java.net.URL;


   import
    org.junit.Test;


   /**
   
 * 从互联网获取图片且保存到指定目录里
 * 
 * 
   @author
    jiqinlin
 *
 
   */
   

   public
    
   class
    InternetTest {

 @SuppressWarnings(
   "
   static-access
   "
   )
 @Test
 
   public
    
   void
    getImg() 
   throws
    Exception {
 String urlPath 
   =
    
   "
   http://i0.itc.cn/20101116/62d_67fd2b2a_207d_4de2_a4f9_fb93cc8da492_0.jpg
   "
   ;
 URL url 
   =
    
   new
    URL(urlPath);
 HttpURLConnection conn 
   =
    (HttpURLConnection) url.openConnection();
 conn.setConnectTimeout(
   6
   *
   1000
   ); 
   //
    注意要设置超时，设置时间不要超过10秒，避免被android系统回收
   

    
   if
    (conn.getResponseCode() 
   !=
    
   200
   ) 
   throw
    
   new
    RuntimeException(
   "
   请求url失败
   "
   );
 InputStream inSream 
   =
    conn.getInputStream();
 
   //
   把图片保存到项目的根目录
   

    
   new
    InternetTest().readAsFile(inSream, 
   new
    File(
   "
   sohu.jpg
   "
   )); 
 }
 
 
   public
    
   static
    
   void
    readAsFile(InputStream inSream, File file) 
   throws
    Exception{
 FileOutputStream outStream 
   =
    
   new
    FileOutputStream(file);
 
   byte
   [] buffer 
   =
    
   new
    
   byte
   [
   1024
   ];
 
   int
    len 
   =
    
   -
   1
   ;
 
   while
   ( (len 
   =
    inSream.read(buffer)) 
   !=
    
   -
   1
    ){
 outStream.write(buffer, 
   0
   , len);
 }
 outStream.close();
 inSream.close();
 }

}