编程调用Ant javac api出错

[ptqw]

以编程方式调用Ant编译源文件(不用xml)，代码如下:
　　　　Javac compiler = new Javac();
compiler.setProject(new Project());
File destFile = new File(buildFillePath);
Path srcPath = new Path(compiler.getProject(), srcFilePath);
compiler.setSrcdir(srcPath);
compiler.setDestdir(destFile);
compiler.setCompiler("extJavac");
try {
compiler.execute();
}
catch (BuildException e) {
e.printStackTrace();
}

报错如下：

Error running javac.exe compiler
at org.apache.tools.ant.taskdefs.compilers.DefaultCompilerAdapter.executeExternalCompile(DefaultCompilerAdapter.java:473)
at org.apache.tools.ant.taskdefs.compilers.JavacExternal.execute(JavacExternal.java:47)
at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:931)
at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:757)
at hello_world.actions.SampleAction.testAntCompile(SampleAction.java:172)
at hello_world.actions.SampleAction.run(SampleAction.java:85)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:254)
at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:229)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:539)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488)
at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:441)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:928)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3348)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2968)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1930)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1894)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:422)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
at org.eclipse.core.launcher.Main.run(Main.java:977)
at org.eclipse.core.launcher.Main.main(Main.java:952)
Caused by: java.io.IOException: CreateProcess: javac.exe -d E:\Study\Test2 -classpath "E:\Study\Test2;D:\Eclipse IDE\Wtp-Sup\eclipse\startup.jar" -sourcepath E:\Study\Test1 -g:none E:\Study\Test1\Student.java E:\Study\Test1\bobo\PrepareTestStudentManager.java E:\Study\Test1\bobo\ReflectManager.java E:\Study\Test1\bobo\Student.java E:\Study\Test1\bobo\StudentManager.java E:\Study\Test1\bobo\SynchronizedAccord.java E:\Study\Test1\bobo\TestMain.java E:\Study\Test1\bobo\reflect\ReflectMain.java E:\Study\Test1\bobo\reflect\ReflectManager.java E:\Study\Test1\bobo\reflect\Student.java E:\Study\Test1\bobo\util\PropetiesManager.java E:\Study\Test1\bobo\util\TestPropertiesManager.java error=2
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(Unknown Source)
at java.lang.ProcessImpl.start(Unknown Source)
at java.lang.ProcessBuilder.start(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.tools.ant.taskdefs.Execute$Java13CommandLauncher.exec(Execute.java:834)
at org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:435)
at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:449)
at org.apache.tools.ant.taskdefs.compilers.DefaultCompilerAdapter.executeExternalCompile(DefaultCompilerAdapter.java:470)
... 32 more

请教下各位大大问题出在哪？最好给出修改过的源码，谢谢！

[ptqw]

问题已解决

Javac compiler = new Javac();
compiler.setProject(new Project());
File destFile = new File(buildFillePath);
Path srcPath = new Path(compiler.getProject(), srcFilePath);
compiler.setFork(true);
compiler.setSrcdir(srcPath);
compiler.setDestdir(destFile);
try {
compiler.execute();
}
catch (BuildException e) {
e.printStackTrace();
}

这样就对了，会报以上的错是因为classPath没设，汗。。。

[HappinessBoy]

java.io.IOException,
应该是你调用的java文件有问题。

[dancingfox520]

我也遇到同样问题 环境是eclipse

classpath 已设置 求解