java - Pmd ant 脚本给出 java.lang.NoClassDefFoundError : org/jaxen/JaxenException

Question

<?xml version="1.0" encoding="UTF-8"?>
<project name="Example" default="pmd" basedir=".">
<property name="PMD.home" location="D:\Software\Java\pmd-4.2.5"/>
<path id="PMD.lib"> 
    <fileset dir="${PMD.home}\lib"> 
            <include name="*.jar" /> 
    </fileset> 
    <!--pathelement location="${PMD.home}/lib/jaxen-1.1.1.jar" -->
</path> 
<echo>${PMD.home}\lib</echo>
<taskdef name="pmd" classname="net.sourceforge.pmd.ant.PMDTask" > 
    <classpath refid="PMD.lib" /> 
</taskdef> 
<target name="pmd">
<taskdef name="pmd" classname="net.sourceforge.pmd.ant.PMDTask" classpathref="PMD.lib"    />       
<echo>${PMD.home}\bin\pmd-rules.xml</echo>
<pmd> 
<ruleset>${PMD.home}\bin\pmd-rules.xml</ruleset>
<formatter type="html" toFile="pmd_report_ant9.html"  />
<fileset dir="C:\Documents and Settings\twarsi\eclipse3_5\tw1\Example">
<include name="**\*.java"/>
 </fileset>
 </pmd>
</target>
</project>

我正在尝试运行上面的 ant 脚本来执行 PMD 规则集 pmd-rules.xml，但出现以下错误。

 pmd:
 [echo] D:\Software\Java\pmd-4.2.5\bin\pmd-rules.xml
  [pmd] Using the normal ClassLoader
  [pmd] Adding classpath entry: <D:\Software\Java\pmd-4.2.5\bin>
  [pmd] Sending a report to file = D:\Software\Java\pmd-4.2.5\bin\pmd_report
  _ant9.html; renderer = html

 BUILD FAILED
 java.lang.NoClassDefFoundError: org/jaxen/JaxenException
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
    at java.lang.Class.getConstructor0(Class.java:2699)
    at java.lang.Class.newInstance0(Class.java:326)
    at java.lang.Class.newInstance(Class.java:308)
    at net.sourceforge.pmd.RuleSetFactory.parseSingleRuleNode(RuleSetFactory
  .java:309)
    at net.sourceforge.pmd.RuleSetFactory.parseRuleNode(RuleSetFactory.java:
 253)
    at net.sourceforge.pmd.RuleSetFactory.parseRuleSetNode(RuleSetFactory.ja
 va:209)
    at net.sourceforge.pmd.RuleSetFactory.createSingleRuleSet(RuleSetFactory
.java:135)
    at net.sourceforge.pmd.RuleSetFactory.createRuleSets(RuleSetFactory.java
:85)
    at net.sourceforge.pmd.ant.PMDTask.doTask(PMDTask.java:220)
    at net.sourceforge.pmd.ant.PMDTask.execute(PMDTask.java:334)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
 java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:357)
    at org.apache.tools.ant.Target.performTasks(Target.java:385)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExe
cutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
    at org.apache.tools.ant.Main.runBuild(Main.java:758)
    at org.apache.tools.ant.Main.startAnt(Main.java:217)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)

你能告诉我我遗漏了什么吗？甚至 jaxen-1.1.1.jar 都在 lib 目录中。但它显示错误。我是否在 ant 脚本中遗漏了一些东西。

Answer 1

将pmd.home\lib 中的所有文件复制到ant.home\lib 文件夹

pmd.home 是您的 pmd 目录:在您的例子中:D:\Software\Java\pmd-4.2.5ant.home 是您的 ant 主目录:假设您使用的是 netbeans，它将是 netbeans\java\ant

注意重复的 jar 或重复的版本(尤其是 ant)。

然后，再次运行命令。希望对您有所帮助。