Ant自定义任务，抛出StackOverflowError异常

Ant扩展任务，抛出StackOverflowError异常在继承Task做扩展任务时用到了父类的Project实例中的log方法，与此同时也在使用其它Output流实例向命令行输出信息，这时就会出现StackOverflowError的问题，需要注意。

java.lang.StackOverflowError问题重现场景

Java源代码，负责定义一个Ant任务，注意Project实例的应用

/** * 自定义Ant任务 * @author WangYanCheng * @version 2011-10-20 */ public class SimpleTask extends Task { private Project project; private List fileListArr = new ArrayList(); @Override public void execute() throws BuildException { String message = project.getProperty("ant.project.name"); project.log("Here is project " + message + ".", Project.MSG_ERR); project.log("My location is " + getLocation()); for (Iterator iterator = fileListArr.iterator(); iterator.hasNext();) { //project.log(iterator.next().path, Project.MSG_INFO); System.out.println(iterator.next().path); } } public void setProject(Project proj) { this.project = proj; } public FileList createFileList() { FileList fileList = new FileList(); fileListArr.add(fileList); return fileList; } /** * Nested Object * @author WangYanCheng * @version 2011-10-20 */ public class FileList { String path; public FileList(){} public String getPath() { return path; } public void setPath(String path) { this.path = path; } } }

Ant源代码，描述了Ant任务

<?xml version="1.0" encoding="UTF-8"?> <project default="main" name="SimpleTask" basedir="."><property name="classes.dir" value="D:\work\workspace\mywork\webRoot\WEB-INF\classes"><target name="jar"><jar basedir="${classes.dir}" destfile="${ant.project.name}.jar"></jar></target><target name="main" depends="jar"><taskdef name="SimpleTask" classpath="${ant.project.name}.jar" classname="org.ybygjy.ant.SimpleTask"></taskdef><simpletask><filelist path="ABC"><filelist path="DEF"></filelist></filelist></simpletask></target></property></project>

异常信息

Buildfile: D:\work\workspace\mywork\leanant\SimpleTask.xml jar: [jar] Building jar: D:\work\workspace\mywork\leanant\SimpleTask.jar main: Here is project SimpleTask. My location is D:\work\workspace\mywork\leanant\SimpleTask.xml:9: ABC ABC ABCABCABCABCABCABCABCABCABCABC BUILD FAILED D:\work\workspace\mywork\leanant\SimpleTask.xml:9: java.lang.StackOverflowError Total time: 922 milliseconds