页面的代码如下：
- HTML code
<s:action namespace="/competitions" name="listcompetitions" id="bean" /> <s:select list="bean.listcompetitions" name="selectCompetitions" id="selectCompetitions" listKey="id" listValue="name" headerKey="" headerValue="--请选择赛事--" theme="simple"> </s:select>
Struts2中list的配置如下：
- XML code
<action name="listcompetitions" class="competitionsAction" method="listCompetitions"> <result name="success">/web/competitions/competitionsList.jsp</result> <result name="input">/web/competitions/error.jsp</result> </action>
Action中
private List<Competitions> listCompetitions;
get、set方法都有，并且listCompetitions 方法能正确调用，并且有值！
后台执行的代码以及错误如下：
- Java code
2012-4-11 22:06:39 org.apache.catalina.core.StandardWrapperValve invoke严重: Servlet.service() for servlet jsp threw exceptiontag 'select', field 'list', name 'selectCompetitions': The requested list key 'bean.listcompetitions' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location] at org.apache.struts2.components.Component.fieldError(Component.java:237) at org.apache.struts2.components.Component.findValue(Component.java:358) at org.apache.struts2.components.ListUIBean.evaluateExtraParams(ListUIBean.java:80) at org.apache.struts2.components.Select.evaluateExtraParams(Select.java:105) at org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:856) at org.apache.struts2.components.UIBean.end(UIBean.java:510) at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:42) at org.apache.jsp.web.unitInfo.unitInfoAdd_jsp._jspx_meth_s_005fselect_005f0(unitInfoAdd_jsp.java:730) at org.apache.jsp.web.unitInfo.unitInfoAdd_jsp._jspService(unitInfoAdd_jsp.java:493) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:88) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:619)Hibernate: select competitio0_.id as id10_, competitio0_.name as name10_, competitio0_.startTime as startTime10_, competitio0_.endTime as endTime10_, competitio0_.address as address10_, competitio0_.sponsors as sponsors10_, competitio0_.organizer as organizer10_, competitio0_.coOrganizer as coOrgani8_10_, competitio0_.status as status10_, competitio0_.remarks as remarks10_, competitio0_.userId as userId10_ from sportSys.dbo.competitions competitio0_