/**
* 从网络Url中下载文件
* @param urlStr
* @param fileName
* @param savePath
* @throws IOException
*/
public static void downLoadFromUrl(String urlStr,String fileName,String savePath)
throws IOException{
URL url =
new URL(urlStr);
HttpURLConnection conn =
(HttpURLConnection)url.openConnection();
//设置超时间为3秒
conn.setConnectTimeout(3*1000
);
//防止屏蔽程序抓取而返回403错误
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"
);
//得到输入流
InputStream inputStream =
conn.getInputStream();
//获取自己数组
byte[] getData =
readInputStream(inputStream);
//文件保存位置
File saveDir =
new File(savePath);
if(!
saveDir.exists()){
saveDir.mkdir();
}
File file =
new File(saveDir+File.separator+
fileName);
FileOutputStream fos =
new FileOutputStream(file);
fos.write(getData);
if(fos!=
null){
fos.close();
}
if(inputStream!=
null){
inputStream.close();
}
System.out.println("info:"+url+" download success"
);
}
/**
* 从输入流中获取字节数组
* @param inputStream
* @return
* @throws IOException
*/
public static byte[] readInputStream(InputStream inputStream)
throws IOException {
byte[] buffer =
new byte[1024
];
int len = 0
;
ByteArrayOutputStream bos =
new ByteArrayOutputStream();
while((len = inputStream.read(buffer)) != -1
) {
bos.write(buffer, 0
, len);
}
bos.close();
return bos.toByteArray();
}
public static void main(String[] args) {
try{
downLoadFromUrl("http://101.95.48.97:8005/res/upload/interface/apptutorials/manualstypeico/6f83ce8f-0da5-49b3-bac8-fd5fc67d2725.png"
,
"百度.jpg","d:/resource/images/diaodiao/country/"
);
}catch (Exception e) {
// TODO: handle exception
}
}
