2
的log4j.xml我validLog4jXML字符串這樣的XPath使用VTD-XML
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE log4j:eventSet PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd" >
<log4j:eventSet version="1.2" xmlns:log4j="http://jakarta.apache.org/log4j/" includesLocationInfo="true">
<log4j:event logger="org.apache.axis2.deployment.ClusterBuilder"
timestamp="1395925603261" level="INFO" thread="localhost-startStop-1">
<log4j:message>
<![CDATA[Clustering has been disabled]]>
</log4j:message>
</log4j:event>
</log4j:eventSet>
我嘗試運行這段代碼:
VTDGen doc = new VTDGen();
doc.setDoc(validLog4jXML.getBytes());
doc.parse(true);
VTDNav vn = doc.getNav();
AutoPilot ap = new AutoPilot(vn);
String xPath = "//log4j:event[(((@level=\"INFO\") or (@level=\"ERROR\")) and "
+ "(@timestamp>\"1395842943674\")) and (@timestamp<\"1396015743674\")]";
ap.selectXPath(xPath);
在最後一行我得到異常:
[ERROR] No URL found for prefix:log4j
com.ximpleware.XPathParseException: No URL found for prefix:log4j
at com.ximpleware.xpath.CUP$parser$actions.CUP$parser$do_action(parser.java:752)
at com.ximpleware.xpath.parser.do_action(parser.java:434)
at java_cup.runtime.lr_parser.parse(lr_parser.java:570)
at com.ximpleware.AutoPilot.selectXPath(AutoPilot.java:809)
at ad.ecs.library.LogHelper.collectLogNodesVTD(LogHelper.java:654)
at ad.ecs.library.LogHelper.collectLogNodesForADayVTD(LogHelper.java:571)
at ad.ecs.library.LogHelper.collectLogNodesForTheWeekVTD(LogHelper.java:456)
at ad.ecs.library.LogHelper.access$2(LogHelper.java:453)
at ad.ecs.library.LogHelper$2.run(LogHelper.java:313)
at java.lang.Thread.run(Thread.java:724)
我試着看看關於VTD-XML的文檔,它說:
爲了避免這種情況的例外:
com.ximpleware.XPathParseException:找不到網址前綴:XYZ
一定要創建一個支持命名空間的初始導航對象(即,與上param設置爲true),並傳入名稱空間散列作爲find-indexes,first-match,all-matches,get-xml和get-hash的最終參數。
我戳着試圖按照這些步驟,但沒有成功。我將不勝感激任何幫助。
非常感謝你 - 爲我工作 – serge