我在JSF中不论是用 <h:selectManyListbox> 还是 <h:selectOnuMenu> 都报这样的错误：
16:01:59,343 ERROR [jsp]:704 - Servlet.service() for servlet jsp threw exception
java.lang.IllegalArgumentException: "{2} " Conversion Error setting value ' '{0} ' ' for ' '{1} ' '.
at com.sun.faces.util.Util.getSelectItems(Util.java:610)
at com.sun.faces.renderkit.html_basic.MenuRenderer.getOptionNumber(MenuRenderer.java:488)
at com.sun.faces.renderkit.html_basic.MenuRenderer.renderSelect(MenuRenderer.java:465)
at com.sun.faces.renderkit.html_basic.MenuRenderer.encodeEnd(MenuRenderer.java:430)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:712)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:443)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:233)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:693)
at javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:600)
at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:537)
at com.sun.faces.taglib.html_basic.PanelGridTag.doEndTag(PanelGridTag.java:460)
at org.apache.jsp.general.createGameTable_jsp._jspx_meth_h_panelGrid_0(createGameTable_jsp.java:319)
at org.apache.jsp.general.createGameTable_jsp._jspx_meth_h_form_0(createGameTable_jsp.java:222)
at org.apache.jsp.general.createGameTable_jsp._jspService(createGameTable_jsp.java:145)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:147)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)