异常：
java.lang.RuntimeException: Invalid action class configuration that references an unknown class named [YunWeiAction] org.apache.struts2.convention.ConventionsServiceImpl.determineResultPath(ConventionsServiceImpl.java:100) org.apache.struts2.convention.ConventionUnknownHandler.determinePath(ConventionUnknownHandler.java:385) org.apache.struts2.convention.ConventionUnknownHandler.handleUnknownResult(ConventionUnknownHandler.java:274) com.opensymphony.xwork2.DefaultUnknownHandlerManager.handleUnknownResult(DefaultUnknownHandlerManager.java:87) com.opensymphony.xwork2.DefaultActionInvocation.createResult(DefaultActionInvocation.java:226) com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:367) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:277) com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263) org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:166) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485) org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
root cause
java.lang.ClassNotFoundException: YunWeiAction org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1360) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1206) org.apache.struts2.util.ClassLoaderUtils.loadClass(ClassLoaderUtils.java:111) org.apache.struts2.convention.ConventionsServiceImpl.determineResultPath(ConventionsServiceImpl.java:98) org.apache.struts2.convention.ConventionUnknownHandler.determinePath(ConventionUnknownHandler.java:385) org.apache.struts2.convention.ConventionUnknownHandler.handleUnknownResult(ConventionUnknownHandler.java:274) com.opensymphony.xwork2.DefaultUnknownHandlerManager.handleUnknownResult(DefaultUnknownHandlerManager.java:87) com.opensymphony.xwork2.DefaultActionInvocation.createResult(DefaultActionInvocation.java:226) com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:367) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:277) com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263) org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:166) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485) org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
大致有三种可能原因：
（1）这个Action类的确是不存在，或者是在struts.xml中配置错了。 http://see-sea007.blog.163.com/blog/static/59008062201212951911913/
（2）没有合适的result name。如果result name错了的话，也有可能报这个错。 http://apps.hi.baidu.com/share/detail/57378863
（3）JSP页面的错误。 http://blog.163.com/ztxz_179/blog/static/105205995201221711561637/
我是第三种！坑爹啊！下面的方式使用的checkbox标签错了！我不知道为什么！
<s:checkbox name="groupUser.oilele" fieldValue="1"
value="groupUser.oilele" label="断油断电权限" />
<s:checkbox name="groupUser.modify" fieldValue="1"
value="groupUser.modify" label="修改信息权限" />
<s:checkbox name="groupUser.export" fieldValue="1"
value="groupUser.export" label="导出数据权限" />
(4)第四种可能就是Action错了。我出现了一次，是类型问题，我估计上面的错误还是类型问题！比如，前台界面中一个 <input type="text" value="2012-01-01" name="searchDate" />的
输入框，如果是让它对应后台Action中的Date类型的searchDate，那么可能就会出现这个错误！
我的解决办法是将Action中的Date改成String类型的，至于String和Date类型之间的转换我就使用DateFormat。不过，貌似还可以自定义类型转换器达到这个目的，可以查看书《深入浅出Struts2》，
里面有介绍。
例子：
前台JSP：
<input name="searchStartDate" type="text" class="dateinput" value="<s:property value="searchStartDate" />" /> - <input name="searchEndDate" type="text" class="dateinput" value="<s:property value="searchEndDate" />" />
后台Action：
/** * 日志管理 * @return */ public String logManager() { Calendar calendar = Calendar.getInstance(); calendar.roll(Calendar.DATE, 1);//到下一天的凌晨 Date endDate = calendar.getTime(); calendar.roll(Calendar.DATE, -3);// 前三天的凌晨 Date startDate = calendar.getTime(); findLogList(startDate,endDate); searchEndDate = dateFormat.format(endDate); searchStartDate = dateFormat.format(startDate); return SUCCESS; } /** * 日志搜索 * @return */ public String logSearch() { // 转型 String->Date System.out.println(searchDate); System.out.println(searchDate.getDate()); try { findLogList(dateFormat.parse(searchStartDate),dateFormat.parse(searchEndDate)); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } page = "YunWei_logManager"; return TARGET; } // 内部方法，得到指定时间之内的日志列表 private void findLogList(Date startDate,Date endDate) { System.out.println(searchStartDate); System.out.println(searchEndDate); // 得到总记录数 total = logService.getCountByTimeBetween(startDate,endDate); // 得到总页数 if (total % PAGESIZE == 0) { pages = total / PAGESIZE; } else { pages = total / PAGESIZE + 1; } // 得到当前的页索引 if (pageIndex < 1) pageIndex = 1; if (pageIndex > pages)// 暂时不判断 pageIndex = pages; logList = logService.findByTimeBetween(startDate, endDate, (pageIndex - 1) * PAGESIZE, PAGESIZE); }
这种情况下的更好的解决办法是使用struts 2的datetimepicker标签：http://www.mkyong.com/struts2/struts-2-datetimepicker-example/
例子：记得将 struts-dojo-plugin.jar 包放到WEB-INF/lib下！
<%@ taglib prefix="s" uri="/struts-tags" %> <%@ taglib prefix="sx" uri="/struts-dojo-tags" %> <html> <head> <sx:head /> </head> <body> <sx:datetimepicker name="date2" label="Format (dd-MMM-yyyy)" displayFormat="dd-MMM-yyyy" value="%{'2010-01-01'}"/>
Action中定义为Date类型，传过来的值得到的也是Date类型！
前台JSP：
<td><sx:datetimepicker name="searchStartDate" displayFormat="yyyy-MM-dd" value="%{searchStartDate}" /> —— <sx:datetimepicker name="searchEndDate" displayFormat="yyyy-MM-dd" value="%{searchEndDate}" /> </td>
后台Action：
/** * 日志管理 * * @return */ public String logManager() { Calendar calendar = Calendar.getInstance(); calendar.roll(Calendar.DATE, 1);// 到下一天的凌晨 searchEndDate = calendar.getTime(); calendar.roll(Calendar.DATE, -3);// 前三天的凌晨 searchStartDate = calendar.getTime(); findLogList(searchStartDate, searchEndDate); return SUCCESS; } /** * 日志搜索 * * @return */ public String logSearch() { // 转型 String->Date findLogList(searchStartDate, searchEndDate); page = "YunWei_logManager"; return TARGET; } // 内部方法，得到指定时间之内的日志列表 private void findLogList(Date startDate, Date endDate) { System.out.println(searchStartDate); System.out.println(searchEndDate); // 得到总记录数 total = logService.getCountByTimeBetween(startDate, endDate); // 得到总页数 if (total % PAGESIZE == 0) { pages = total / PAGESIZE; } else { pages = total / PAGESIZE + 1; } // 得到当前的页索引 if (pageIndex < 1) pageIndex = 1; if (pageIndex > pages)// 暂时不判断 pageIndex = pages; logList = logService.findByTimeBetween(startDate, endDate, (pageIndex - 1) * PAGESIZE, PAGESIZE); }
这样子，代码简洁多了！
