struts2标签异常？？？

Question

严重: Servlet.service() for servlet jsp threw exception
tag 'select', field 'list', name 'searchInfo.subsql': The requested list key '#session.searchMap' 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:231)
 at org.apache.struts2.components.Component.findValue(Component.java:293)
 at org.apache.struts2.components.ListUIBean.evaluateExtraParams(ListUIBean.java:79)
 at org.apache.struts2.components.Select.evaluateExtraParams(Select.java:99)
 at org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:780)
 at org.apache.struts2.components.UIBean.end(UIBean.java:481)
 at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:43)
 at org.apache.jsp.left_jsp._jspx_meth_s2_005fselect_005f0(left_jsp.java:237)
 at org.apache.jsp.left_jsp._jspx_meth_s2_005fform_005f0(left_jsp.java:159)
 at org.apache.jsp.left_jsp._jspService(left_jsp.java:103)
 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:388)
 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.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
 at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)
 at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)
 at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
 at org.apache.jsp.IndexTemp_jsp._jspService(IndexTemp_jsp.java:87)
 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:388)
 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.FilterDispatcher.doFilter(FilterDispatcher.java:416)
 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:293)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
 at java.lang.Thread.run(Thread.java:722)

三月 27, 2012 8:44:04 下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
tag 'select', field 'list', name 'searchInfo.subsql': The requested list key '#session.searchMap' 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:231)
 at org.apache.struts2.components.Component.findValue(Component.java:293)
 at org.apache.struts2.components.ListUIBean.evaluateExtraParams(ListUIBean.java:79)
 at org.apache.struts2.components.Select.evaluateExtraParams(Select.java:99)
 at org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:780)
 at org.apache.struts2.components.UIBean.end(UIBean.java:481)
 at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:43)
 at org.apache.jsp.left_jsp._jspx_meth_s2_005fselect_005f0(left_jsp.java:237)
 at org.apache.jsp.left_jsp._jspx_meth_s2_005fform_005f0(left_jsp.java:159)
 at org.apache.jsp.left_jsp._jspService(left_jsp.java:103)
 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:388)
 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.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
 at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)
 at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)
 at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
 at org.apache.jsp.IndexTemp_jsp._jspService(IndexTemp_jsp.java:87)
 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:388)
 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.FilterDispatcher.doFilter(FilterDispatcher.java:416)
 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:293)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
 at java.lang.Thread.run(Thread.java:722)

Answer 1

searchMap ,我在后台对searchMap 进行的操作是put()方法，谢谢了，我再自己看下，现在对我来说这struts标签有点难

Answer 2

这个可能是你后台的servlet中没有 searchMap 这个集合的 get set方法

Answer 3

错误信息很明确，你难道没看到？

tag 'select', field 'list', name 'searchInfo.subsql': The requested list key '#session.searchMap' could not be resolved as a collection/array/map/enumeration/iterator type。