java.util.regex.PatternSyntaxException：使用螞蟻在索引0附近發生非法重複

我剛剛開始使用Ant。我想將一些數據附加到上下文值標記。java.util.regex.PatternSyntaxException：使用螞蟻在索引0附近發生非法重複

這裏是XML

的web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
    version="3.0"> 
    <context-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value>/WEB-INF/abc.xml</param-value> 
    </context-param> 
</web-app>

，這裏是Ant構建目標

<target name="deploy"> 
    <!-- edit web.xml to update context-param--> 
    <replaceregexp file="$web.xml" match='${web-app.context-param.param-value}' replace="${web-app.context-param.param-value},/WEB-INF/new.xml" /> 
</target>

，但這正顯示出

java.util.regex.PatternSyntaxException: Illegal repetition near index 0 
${web-app.context-param.param-value} 
^ 
     at java.util.regex.Pattern.error(Pattern.java:1924) 
     at java.util.regex.Pattern.closure(Pattern.java:3104) 
     at java.util.regex.Pattern.sequence(Pattern.java:2101) 
     at java.util.regex.Pattern.expr(Pattern.java:1964) 
     at java.util.regex.Pattern.compile(Pattern.java:1665) 
     at java.util.regex.Pattern.<init>(Pattern.java:1337) 
     at java.util.regex.Pattern.compile(Pattern.java:1047) 
     at org.apache.tools.ant.util.regexp.Jdk14RegexpMatcher.getCompiledPattern(Jdk14RegexpMatcher.java:68) 
     at org.apache.tools.ant.util.regexp.Jdk14RegexpMatcher.matches(Jdk14RegexpMatcher.java:95) 
     at org.apache.tools.ant.taskdefs.optional.ReplaceRegExp.doReplace(ReplaceRegExp.java:336) 
     at org.apache.tools.ant.taskdefs.optional.ReplaceRegExp.replaceAndWrite(ReplaceRegExp.java:527) 
     at org.apache.tools.ant.taskdefs.optional.ReplaceRegExp.multilineReplace(ReplaceRegExp.java:522) 
     at org.apache.tools.ant.taskdefs.optional.ReplaceRegExp.doReplace(ReplaceRegExp.java:427) 
     at org.apache.tools.ant.taskdefs.optional.ReplaceRegExp.execute(ReplaceRegExp.java:487) 
     at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
     at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
     at java.lang.reflect.Method.invoke(Method.java:606) 
     at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
     at org.apache.tools.ant.Task.perform(Task.java:348) 
     at org.apache.tools.ant.Target.execute(Target.java:435) 
     at org.apache.tools.ant.Target.performTasks(Target.java:456) 
     at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1405) 
     at org.apache.tools.ant.Project.executeTarget(Project.java:1376) 
     at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
     at org.apache.tools.ant.Project.executeTargets(Project.java:1260) 
     at org.apache.tools.ant.Main.runBuild(Main.java:854) 
     at org.apache.tools.ant.Main.startAnt(Main.java:236) 
     at org.apache.tools.ant.launch.Launcher.run(Launcher.java:285) 
     at org.apache.tools.ant.launch.Launcher.main(Launcher.java:112)

我該如何做到這一點，以及出現什麼問題？

來源

2017-01-30 Sunil Garg

實際上，我錯過了爲文件web.xml包含xmlproperty。

<xmlproperty file="web.xml" collapseAttributes="true" />

在將上面的代碼行添加到我的build.xml中後，這個工作正常。

來源

2017-01-30 12:37:26

java.util.regex.PatternSyntaxException：使用螞蟻在索引0附近發生非法重複

回答

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