使用ant生成webservice的问题

[jianglai]

用ant的servicegen任务生成webservice的时候,总是出现如下的错误:
bulid-ear:
[mkdir] Created dir: D:\WebServiceTutorial\classes\${bulid}
[copy] Copying 1 file to D:\WebServiceTutorial\classes\${bulid}
[servicegen] Generating service "myWebservice" ...
[servicegen] Could not process ejb-jar
[servicegen] at weblogic.ant.taskdefs.webservices.autotype.EJBAutoTyper.<init>(EJBAutoTyper.java:
73)
[servicegen] at weblogic.ant.taskdefs.webservices.servicegen.ServiceGenTask.runAutoTyper(ServiceG
enTask.java:337)
[servicegen] at weblogic.ant.taskdefs.webservices.servicegen.ServiceGenTask.generateService(Servi
ceGenTask.java:309)
[servicegen] at weblogic.ant.taskdefs.webservices.servicegen.ServiceGenTask.execute(ServiceGenTas
k.java:177)
[servicegen] at org.apache.tools.ant.Task.perform(Task.java:317)
[servicegen] at org.apache.tools.ant.Target.execute(Target.java:309)
[servicegen] at org.apache.tools.ant.Target.performTasks(Target.java:334)
[servicegen] at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
[servicegen] at org.apache.tools.ant.Project.executeTargets(Project.java:1250)
[servicegen] at org.apache.tools.ant.Main.runBuild(Main.java:610)
[servicegen] at org.apache.tools.ant.Main.start(Main.java:196)
[servicegen] at org.apache.tools.ant.Main.main(Main.java:235)
[servicegen] --- Nested Exception ---
[servicegen] java.util.zip.ZipException: ﾖｸｶｨ､ｵ､?ｿ･ﾑ･ｹ､ｬﾒ侃ﾄ､ｫ､熙ﾞ､ｻ､
[servicegen] at java.util.zip.ZipFile.open(Native Method)
[servicegen] at java.util.zip.ZipFile.<init>(ZipFile.java:112)

这个可能是什么问题呢? 我是先用weblogic.ejbc对ejb进行打包编译,然后用ant生成webservice,请高手指点.