Server returned HTTP response code: 403 for URL:

Java代码中访问链接提示java.io.IOException: Server returned HTTP response code: 403 for URL: 错误

 URL url = new URL(requestUrl);
            httpUrlConn = (HttpURLConnection) url.openConnection();
            httpUrlConn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

已经设置了User-Agent还是不行

 java.io.IOException: Server returned HTTP response code: 403 for URL: http://www.dianping.com/shop/93433662
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at com.Utils.MyFunction.httpRequest(MyFunction.java:37)
    at com.net.service.DianPing.getDianPing(DianPing.java:41)
    at com.net.service.TodayTemperatureService.getDianPing(TodayTemperatureService.java:164)
    at com.net.service.TodayTemperatureService.main(TodayTemperatureService.java:174)

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