网址中有空格要用什么代替_J2SE

【求助】网址中有空格要用什么代替？
网上说用html转义字符代替，故改成这样，还是行不通。
这是部分代码，完整的代码测试过，在没有空格的地址是可以下载的。
第一次发帖求助，哪弄错了还请指教

Java code

    class DownloadService implements Runnable{                public void run() {                        try {                String temp=http://192.168.1.100:8080/mp3/What if she is an angel.mp3;                String adress=mp3Address.replace(" ", "&nbsp");System.out.println(adress);                InputStream is = downloader.getInputStreamFromUrl(adress);                        }                }                public InputStream getInputStreamFromUrl(String urlStr)            throws MalformedURLException, IOException {        URL url = new URL(urlStr);        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();        InputStream inputStream = urlConn.getInputStream();        return inputStream;    }

------解决方案--------------------------------------------------------
直接对网址进行URL编码 temp=java.net.URLEncoder.encode(temp,"utf-8");
InputStream is = downloader.getInputStreamFromUrl(temp);
------解决方案--------------------------------------------------------
%20
------解决方案--------------------------------------------------------
String adress=mp3Address.replace(" ", "+");

不过最好使用1楼所说的方法