简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW) 日本語(JA) 한국어(KO) Melayu(MS) Français(FR) Deutsch(DE)
Home > Backend Development > XML/RSS Tutorial > body text

Summary of parsing RSS issues

Y2J
Release： 2017-04-24 16:35:55
Original
2450 people have browsed it

try{ 
   org.dom4j.io.SAXReader saxReader = new org.dom4j.io.SAXReader();
   org.dom4j.Document document = saxReader.read(rssUrl);
   org.dom4j.Element channel = (org.dom4j.Element) document.getRootElement().element("channel");
     int index =0;
           for (java.util.Iterator i = channel.elementIterator("item"); i.hasNext();){ 
            if(index+1>rssTable.Rows.length){
             break;
            } 
             org.dom4j.Element element = (org.dom4j.Element) i.next();
                String title = element.elementText("title");
                String link = element.elementText("link");
                String pubDate = element.elementText("pubDate");
                String source = element.elementText("source");  
                ci.adp.DataRow rssRow = rssTable.getDataRowByIndex(index);
              
                rssRow.setValue("TITLE", title);
                rssRow.setValue("LINK", link);
                rssRow.setValue("PUBDATE", pubDate);
                rssRow.setValue("SOURCE", source); 
                /*
                System.out.println("title标题: " + title);
                System.out.println("link链接: " + link);
                System.out.println("pubDate发布时间: " +pubDate); 
                System.out.println("source来源: " + source);
                */
                index++;  
           }
  }catch (Exception e) { 
   e.printStackTrace();
  }
Copy after login

After struggling all morning, I finally figured it out in another way.

The above dom4j method works fine in my local environment (windows+weblogic10+jdk1.6),
put it on the server (linux5.4 x64+weblogic10 +jdk1.6), this error is always reported: 

[oracle@ablw010215 bin]$ Warning: Caught exception attempting to use SAX to load a SAX XMLReader
Warning: Exception was: java.lang.ClassCastException: com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration
Warning: I will print the stack trace then carry on using the default SAX parser
java.lang.ClassCastException: com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration
        at org.xml.sax.helpers.XMLReaderFactory.loadClass(XMLReaderFactory.java:199)
        at org.xml.sax.helpers.XMLReaderFactory.createXMLReader(XMLReaderFactory.java:150)
        at org.dom4j.io.SAXHelper.createXMLReader(SAXHelper.java:83)
        at org.dom4j.io.SAXReader.createXMLReader(SAXReader.java:894)
        at org.dom4j.io.SAXReader.getXMLReader(SAXReader.java:715)
        at org.dom4j.io.SAXReader.read(SAXReader.java:435)
        at org.dom4j.io.SAXReader.read(SAXReader.java:321)
        at jsp_servlet._ajax._comm._bbs.__iframearticlecontent._jspService(__iframearticlecontent.java:100)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:35)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:27)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:57)
        at ci.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:107)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:57)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
org.dom4j.DocumentException: SAX2 driver class weblogic.xml.jaxp.RegistryXMLReader does not implement XMLReader Nested exception: SAX2 driver class weblogic.xml.jaxp.RegistryXMLReader does not implement XMLReader
        at org.dom4j.io.SAXReader.read(SAXReader.java:484)
        at org.dom4j.io.SAXReader.read(SAXReader.java:321)
        at jsp_servlet._ajax._comm._bbs.__iframearticlecontent._jspService(__iframearticlecontent.java:99)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:35)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:27)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:57)
        at ci.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:107)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:57)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
Nested exception: 
java.lang.ClassCastException: com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration
        at org.dom4j.io.SAXHelper.createXMLReader(SAXHelper.java:98)
        at org.dom4j.io.SAXReader.createXMLReader(SAXReader.java:894)
        at org.dom4j.io.SAXReader.getXMLReader(SAXReader.java:715)
        at org.dom4j.io.SAXReader.read(SAXReader.java:435)
        at org.dom4j.io.SAXReader.read(SAXReader.java:321)
        at jsp_servlet._ajax._comm._bbs.__iframearticlecontent._jspService(__iframearticlecontent.java:100)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:35)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:27)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:57)
        at ci.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:107)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:57)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
Nested exception: java.lang.ClassCastException: com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration
        at org.dom4j.io.SAXHelper.createXMLReader(SAXHelper.java:98)
        at org.dom4j.io.SAXReader.createXMLReader(SAXReader.java:894)
        at org.dom4j.io.SAXReader.getXMLReader(SAXReader.java:715)
        at org.dom4j.io.SAXReader.read(SAXReader.java:435)
        at org.dom4j.io.SAXReader.read(SAXReader.java:321)
        at jsp_servlet._ajax._comm._bbs.__iframearticlecontent._jspService(__iframearticlecontent.java:100)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:35)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:27)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:57)
        at ci.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:107)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:57)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
Copy after login

<2012-11-8 10:56:08 AM CST>
<2012-11-8 10:56:08 AM CST> < Socket>

在weblogic Adding configuration files to .xml, adding lib packages, etc. will not work. Just replace it with this one (it depends on the lib in the resources I uploaded, completely free): 

try { URL url = new URL(rss); // 读取Rss源 XmlReader reader = new XmlReader(url); System.out.println("Rss源的编码格式为：" + reader.getEncoding()); SyndFeedInput input = new SyndFeedInput(); SyndFeed feed = input.build(reader); // 得到SyndFeed对象，即得到Rss源里的所有信息 List entries
 = feed.getEntries(); // 得到Rss新闻中子项列表 int index =0; for (int i = 0; i < entries.size(); i++) { // 循环得到每个子项信息 if(index+1>rssTable.Rows.length){ break; } SyndEntry entry = (SyndEntry) entries.get(i); /* System.out.println("标题：" + entry.getTitle()); System.out.println("连接地址："
 + entry.getLink()); SyndContent description = entry.getDescription(); System.out.println("标题简介：" + description.getValue()); System.out.println("发布时间：" + entry.getPublishedDate()); // 以下是Rss源可先的几个部分 System.out.println("标题的作者：" + entry.getAuthor()); */ ci.adp.DataRow
 rssRow = rssTable.getDataRowByIndex(index); rssRow.setValue("TITLE", entry.getTitle()); rssRow.setValue("LINK", entry.getLink()); rssRow.setValue("PUBDATE", entry.getPublishedDate()); rssRow.setValue("SOURCE", entry.getAuthor()); /* // 此标题所属的范畴 List categoryList
 = entry.getCategories(); if (categoryList != null) { for (int m = 0; m < categoryList.size(); m++) { SyndCategory category = (SyndCategory) categoryList .get(m); System.out.println("此标题所属的范畴：" + category.getName()); } } */ index++; /* // 得到流媒体播放文件的信息列表 List
 enclosureList = entry.getEnclosures(); if (enclosureList != null) { for (int n = 0; n < enclosureList.size(); n++) { SyndEnclosure enclosure = (SyndEnclosure) enclosureList .get(n); System.out.println("流媒体播放文件：" + entry.getEnclosures()); } } */ } } catch (Exception
 e) { e.printStackTrace(); }
Copy after login

org.dom4j.io.SAXReader saxReader = new org.dom4j.io.SAXReader();org.dom4j.Document document = saxReader.read(rssUrl);org.dom4j.Element channel = (org.dom4j.Element) document.getRootElement().element("channel"); int index =0; for (java.util.Iterator i = channel.elementIterator("item");
 i.hasNext();){ if(index+1>rssTable.Rows.length){ break; } org.dom4j.Element element = (org.dom4j.Element) i.next(); String title = element.elementText("title"); String link = element.elementText("link"); String pubDate = element.elementText("pubDate"); String
 source = element.elementText("source"); ci.adp.DataRow rssRow = rssTable.getDataRowByIndex(index); rssRow.setValue("TITLE", title); rssRow.setValue("LINK", link); rssRow.setValue("PUBDATE", pubDate); rssRow.setValue("SOURCE", source); /* System.out.println("title标题:
 " + title); System.out.println("link链接: " + link); System.out.println("pubDate发布时间: " +pubDate); System.out.println("source来源: " + source); */ index++; }
Copy after login

The above is the detailed content of Summary of parsing RSS issues. For more information, please follow other related articles on the PHP Chinese website!

Related labels：
rss
source：php.cn
Previous article：Detailed explanation of Server.xml content [Tomcat] Next article：RSS and crawlers, detailed explanation of how to collect data
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
JP character error in title of XML RSS using simplexml_load_file() php PHP version: 7.4.30 I use simplexml_load_filephp function, $rss=simplexml_load_file($url,'...
From 2024-04-03 21:22:05
0
1
304
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！