如何避免使用 IOException 和 SocketTimeoutException JSoup 强制关闭？

Question

我正在使用此代码来检索 html 页面并解析它。

while(doc == null && retry<5){
                retry++;
                try {
                    doc = Jsoup.connect(url).get();
                } catch (IOException e) {
                   Log.e("ReleaseInfo", "JSoup get didnt get a document", e);


                }

一旦检索到文档，我将使用它来获取一些信息并测试是否为空。

  overview = doc.select("div#object-overview").last();


                 if(overview != null){

                paragraph = overview.select("p").last();

                        if(paragraph != null){
                              Log.v("Paragraph", paragraph.text());

                        }else{

                            Toast.makeText(releaseInfo.this, "No over view content", Toast.LENGTH_SHORT);
                        }


                        }

                        else{


                        }

                    featureList = doc.select("div.callout-box").last();


                    if(featureList != null){
                        Log.v("OverView", featureList.text());  

如您所见，我正在使用日志语句捕获错误。 IOException 告诉我这个

08-17 12:54:11.535: ERROR/ReleaseInfo(5960): JSoup get didnt get a document
08-17 12:54:11.535: ERROR/ReleaseInfo(5960): java.net.SocketTimeoutException
08-17 12:54:11.535: ERROR/ReleaseInfo(5960):     at org.apache.harmony.luni.net.PlainSocketImpl.read(PlainSocketImpl.java:564)
08-17 12:54:11.535: ERROR/ReleaseInfo(5960):     at org.apache.harmony.luni.net.SocketInputStream.read(SocketInputStream.java:88)
08-17 12:54:11.535: ERROR/ReleaseInfo(5960):     at java.io.InputStream.skip(InputStream.java:258)
08-17 12:54:11.535: ERROR/ReleaseInfo(5960):     at org.apache.harmony.luni.net.SocketInputStream.skip(SocketInputStream.java:93)
08-17 12:54:11.535: ERROR/ReleaseInfo(5960):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl$ChunkedInputStream.skipOutstandingChunks(HttpURLConnectionImpl.java:374)

如何让我的代码防御此错误，以便在未检索文档时不强制关闭？

另外，我想捕获并响应此异常，导致我的应用程序强制关闭。

08-17 16:27:29.245: ERROR/ReleaseInfo(8641): JSoup get didnt get a document
08-17 16:27:29.245: ERROR/ReleaseInfo(8641): java.io.IOException: 404 error loading URL http://pc.gamespy.com/web-games/parking-wars-2/
08-17 16:27:29.245: ERROR/ReleaseInfo(8641):     at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:387)
08-17 16:27:29.245: ERROR/ReleaseInfo(8641):     at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:364)
08-17 16:27:29.245: ERROR/ReleaseInfo(8641):     at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:143)
08-17 16:27:29.245: ERROR/ReleaseInfo(8641):     at org.jsoup.helper.HttpConnection.get(HttpConnection.java:132)

Answer 1

您显示的日志条目表明您捕获了异常并将其作为错误打印到日志中，正如您所期望的那样。这些条目都不应该强制关闭您的应用程序。还有其他条目吗？例如，如果重试 5 次后您仍然没有建立连接，则“doc”将等于 null，并且以下行将导致未捕获的 nullPointerException，然后将关闭您的应用程序：

overview = doc.select("div#object-overview").last();