[#list uMap?keys as key]

${uMap[key]}

[/#list]

Map uMap = new HashMap();

uMap.put(1,"zhangsan");

uMap.put(2,"lisi");

model.addAttribute("uMap", uMap);

严重: Servlet.service() for servlet springMVC threw exception

FreeMarker template error:

For "...[...]" left-hand operand: Expected a sequence or string (or something that's implicitly convertible to string), but this evaluated to an extended_hash (wrapper: f.t.SimpleHash):

==> uMap [in template "test.ftl" at line 50, column 58]

The failing instruction (FTL stack trace):

----------

==> ${uMap[key]} [in template "test.ftl" at line 50, column 56]

#list uMap?keys as key [in template "test.ftl" at line 48, column 25]

----------

Java stack trace (for programmers):

----------

freemarker.core.UnexpectedTypeException: [... Exception message was already printed; see it above ...]

at freemarker.core.DynamicKeyName.dealWithNumericalKey(DynamicKeyName.java:141)

at freemarker.core.DynamicKeyName._eval(DynamicKeyName.java:104)

at freemarker.core.Expression.eval(Expression.java:111)

at freemarker.core.Expression.evalAndCoerceToString(Expression.java:115)

at freemarker.core.DollarVariable.accept(DollarVariable.java:76)

at freemarker.core.Environment.visit(Environment.java:265)

at freemarker.core.MixedContent.accept(MixedContent.java:93)

at freemarker.core.Environment.visit(Environment.java:265)

at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:181)

at freemarker.core.Environment.visitIteratorBlock(Environment.java:509)

at freemarker.core.IteratorBlock.accept(IteratorBlock.java:103)

at freemarker.core.Environment.visit(Environment.java:265)

at freemarker.core.MixedContent.accept(MixedContent.java:93)

at freemarker.core.Environment.visit(Environment.java:265)

at freemarker.core.Environment.process(Environment.java:243)

at freemarker.template.Template.process(Template.java:277)

at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:366)

at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:283)

at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:233)

at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167)

at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)

at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)

at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)

at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)

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.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:152)

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

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)