exception - Struts2 java.lang.NoSuchMethodException 异常

Question

我在使用 Struts2 时遇到问题，在我的 ActionClass 中我声明了一个:

private Integer table; + setter and getter methods

然后我的 .jsp 中有一个表单:

<s:form action="add-note" theme="simple">

            <s:select name="table" list="tablesList.{tableNr}" cssClass="tables" headerValue="-- Select table --" headerKey="-1"/>

</s:form>

但是当我尝试提交此表单时，出现了一个非常奇怪的异常:

Aug 19, 2011 3:17:28 PM com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn WARNING: Error setting expression 'table' with value '[Ljava.lang.String;@3052ab' ognl.MethodFailedException: Method "setTable" failed for object com.deveto.struts.actions.NotesAction@835dc6 [java.lang.NoSuchMethodException: com.deveto.struts.actions.NotesAction.setTable([Ljava.lang.String;)] at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1285) at ognl.OgnlRuntime.setMethodValue(OgnlRuntime.java:1474) at ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:85) at ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162) at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:27) at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2245) at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.setProperty(CompoundRootAccessor.java:77) at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2245) at ognl.ASTProperty.setValueBody(ASTProperty.java:127) at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220) at ognl.SimpleNode.setValue(SimpleNode.java:301) at ognl.Ognl.setValue(Ognl.java:737) at com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:209) at com.opensymphony.xwork2.ognl.OgnlValueStack.trySetValue(OgnlValueStack.java:173) at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:160) at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:151) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:288) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:199) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:104) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:270) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.deveto.struts.interceptors.LocaleInterceptor.intercept(LocaleInterceptor.java:62) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:498) at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) 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:852) 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:662) Caused by: java.lang.NoSuchMethodException: com.deveto.struts.actions.NotesAction.setTable([Ljava.lang.String;) at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1226) ... 56 more

/-- Encapsulated exception ------------\ java.lang.NoSuchMethodException: com.deveto.struts.actions.NotesAction.setTable([Ljava.lang.String;) at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1226) at ognl.OgnlRuntime.setMethodValue(OgnlRuntime.java:1474) at ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:85) at ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162) at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:27) at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2245) at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.setProperty(CompoundRootAccessor.java:77) at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2245) at ognl.ASTProperty.setValueBody(ASTProperty.java:127) at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220) at ognl.SimpleNode.setValue(SimpleNode.java:301) at ognl.Ognl.setValue(Ognl.java:737) at com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:209) at com.opensymphony.xwork2.ognl.OgnlValueStack.trySetValue(OgnlValueStack.java:173) at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:160) at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:151) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:288) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:199) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:104) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:270) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.deveto.struts.interceptors.LocaleInterceptor.intercept(LocaleInterceptor.java:62) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:498) at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) 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:852) 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:662)

抱歉堆栈跟踪；

Answer 1

我posted this same answer之前的另一个问题，但它也可能与这个问题相关:

NoSuchMethodException ... ([Ljava.lang.String;)] 问题可能是由 HTTP 请求中具有多个同名属性引起的。

如果具有多个同名属性的情况是合法的，您可以通过将 setId(int id) 更改为 setId(String[] idArray) 并将每个数组成员字符串解析为整数来处理多个 id 值。

确保 Action 类中只有一个setId方法(setId(String[] idArray))。如果存在多个名称相同但参数类型不同的方法，似乎某些版本的 struts/ognl(ognl 3.0.4？)可能会混淆。

例如:

public void setId(String[] idArray) {
    for (String idString : idArray) {
       int id = Integer.parseInt(idString);
       ... handle different id values somehow ...
    }
}