struts2+hibernate 查询语句出错 （测试类，成功，action调用查询方法时出错）怪！！
程序代码：
public List<Book> findBycat_id(int cat_id){
String hql2="from Book b where b.category.id=?";
Query query=super.getSession().createQuery(hql2);
query.setInteger(0, cat_id);
List list=query.list();
this.closeSession();
return list;
}
这是包含查询语句的方法，String hql2="from Book b where b.category.id=?";
Query query=super.getSession().createQuery(hql2);
query.setInteger(0, cat_id);
List list=query.list();
this.closeSession();
return list;
}
程序代码：
@Override
public String execute() throws Exception {
this.setBook(dao.findBycat_id(this.getCategory()));
return SUCCESS;
}
public String execute() throws Exception {
this.setBook(dao.findBycat_id(this.getCategory()));
return SUCCESS;
}
这是Action中的调用
写测试类时运行正常，可以查出数据，但是一旦用struts2 的action类调用方法，当方法执行到Query query=super.getSession().createQuery(hql2);这句时就会出错。请各位帮忙看看，困扰了很长时间了。
错误：
java.lang.reflect.InvocationTargetException
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
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action hibernate 语句 查询
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try
catch(throwsable e)
把错误打出来。。
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回复 2楼 午夜屠猪男
程序代码：
public List<Book> findBycat_id(int cat_id) {
List list = null;
try {
String hql2 = "from Book b where b.category.id=?";
Query query = this.getSession().createQuery(hql2);
query.setInteger(0, cat_id);
list = query.list();
} catch (HibernateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
this.closeSession();
}
return list;
谢谢回复。List list = null;
try {
String hql2 = "from Book b where b.category.id=?";
Query query = this.getSession().createQuery(hql2);
query.setInteger(0, cat_id);
list = query.list();
} catch (HibernateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
this.closeSession();
}
return list;
我加了，可是这行到 Query query = this.getSession().createQuery(hql2);就直接跳到finally了，根本就不获取异常啊！
麻烦再指点下，谢谢！！
----------------解决方案--------------------------------------------------------
我已经解决了。其实是两个jar包冲突了，自动导入还得慎重啊，呵呵
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回复 4楼 随风心境
请问是哪两个包啊，我也遇到相似的问题，还请指教啊 ----------------解决方案--------------------------------------------------------
回复 5楼 蝈蝈DJ
不好意思哥们，现在才回复，我自从上次登陆后就没有再来过论坛了。
antlr-2.7.6.jar
如果你是用的hibernate3.2 struts2.1的话，会有连个antlr包，保留这个就行了
不知道现在对你还有没有用。抱歉。。。。。
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