Question

java判断url文件是否存在

Answer 1

public class FileUtils {
/**
* 检测网络资源是否存在　
*
* @param strUrl
* @return
*/
public static boolean isNetFileAvailable(String strUrl) {
InputStream netFileInputStream = null;
try {
URL url = new URL(strUrl);
URLConnection urlConn = url.openConnection();
netFileInputStream = urlConn.getInputStream();
if (null != netFileInputStream) {
return true;
} else {
return false;
}
} catch (IOException e) {
return false;
} finally {
try {
if (netFileInputStream != null)
netFileInputStream.close();
} catch (IOException e) {
}
}
}
}

Answer 2

url? 正则表达式

Answer 3

url文件是什么