import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
public class FileUtil {
/*读取网络文件*/
public static InputStream getFileInputStream(String path) {
URL url = null;
try {
url = new URL(path);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置超时间为3秒
conn.setConnectTimeout(5*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
return conn.getInputStream();
} catch (Exception e) {
log.error("读取网络文件异常:"+path);
}
return null;
}
public void downLoadFromUrl(String urlStr,String fileName,String savePath) throws IOException{
InputStream fileInputStream = getFileInputStream(urlStr);
// if (isOk) {
// log.info("获取输入流:"+fileInputStream.toString());
// //文件保存位置
// String s =savePath+fileName;
// if (huaweiyunOss.uploadFile(s, HuaweiyunOss.FileType.FILES, fileInputStream)) {
// log.info("download success!!");
// }else{
// log.info("download false!!");
// }
// }else{
//获取自己数组
byte[] getData = readInputStream(fileInputStream);
File saveDir = new File(savePath);
if(!saveDir.exists()){
saveDir.mkdir();
}
File file = new File(saveDir+File.separator+fileName);
FileOutputStream output = new FileOutputStream(file);
output.write(getData);
if(output!=null){
output.close();
}
log.info("download success!!");
// }
if(fileInputStream!=null){
fileInputStream.close();
}
}
public byte[] readInputStream(InputStream inputStream) throws IOException {
byte[] buffer = new byte[10240];
int len = 0;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
while((len = inputStream.read(buffer)) != -1) {
bos.write(buffer, 0, len);
}
bos.close();
return bos.toByteArray();
}
}