java url路径中文转义 java下载url路径包含中文需要转义的操作

  int lastIndexOf = downloadUrl.lastIndexOf('/');
    String fileName = downloadUrl.substring(lastIndexOf + 1);
    // 转义关键代码
    String newFileName = URLEncoder.encode(fileName, "utf-8");
    String subUrl = downloadUrl.substring(0,lastIndexOf + 1);
    String newUrl = subUrl + newFileName;

    URL url = new URL(newUrl);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();

function URLencode(sStr) 
  {
   return escape(sStr).
        replace(/\+/g, '%2B').
         replace(/\"/g,'%22').
           replace(/\'/g, '%27').
            replace(/\//g,'%2F');
  }