struts2–java.lang.IllegalAccessException: Class ognl.OgnlRuntime can not access a member of

這個問題是我碰到的一個比較糾結的問題，如果第一次碰到肯定能讓你也很糾結，哈哈

[c-sharp] view plaincopyprint?01.2010-10-19 18:27:22 com.opensymphony.xwork2.util.logging.jdk.JdkLogger warn  02.警告: Error setting expression 'nnew.nTitle' with value '[Ljava.lang.String;@df804e'  03.ognl.NoSuchPropertyException: com.center.vo.News_Table.nTitle [java.lang.IllegalAccessException: Class ognl.OgnlRuntime can not access a member of class com.center.vo.News_Table with modifiers "private"]  04.    at ognl.OgnlRuntime.setFieldValue(OgnlRuntime.java:1663)  05.    at ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:87)  06.    at ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162)  07.    at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:27)  08.    at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2245)  09.    at ognl.ASTProperty.setValueBody(ASTProperty.java:127)  10.    at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)  11.    at ognl.SimpleNode.setValue(SimpleNode.java:301)  12.    at ognl.ASTChain.setValueBody(ASTChain.java:227)  13.    at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)  14.    at ognl.SimpleNode.setValue(SimpleNode.java:301)  15.    at ognl.Ognl.setValue(Ognl.java:737)  16.    at com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:209)  17.    at com.opensymphony.xwork2.ognl.OgnlValueStack.trySetValue(OgnlValueStack.java:173)  18.    at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:160)  19.    at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:151)  20.    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:288)  21.    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:199)  22.    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)  23.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  24.    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)  25.    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)  26.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  27.    at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)  28.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  29.    at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)  30.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  31.    at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)  32.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  33.    at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)  34.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  35.    at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)  36.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  37.    at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)  38.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  39.    at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)  40.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  41.    at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142)  42.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  43.    at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:166)  44.    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)  45.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  46.    at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)  47.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  48.    at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)  49.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  50.    at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190)  51.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  52.    at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)  53.    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)  54.    at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)  55.    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485)  56.    at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)  57.    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)  58.    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)  59.    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)  60.    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)  61.    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)  62.    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)  63.    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)  64.    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)  65.    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)  66.    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)  67.    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)  68.    at java.lang.Thread.run(Unknown Source)  69.Caused by: java.lang.IllegalAccessException: Class ognl.OgnlRuntime can not access a member of class com.center.vo.News_Table with modifiers "private"  70.    at sun.reflect.Reflection.ensureMemberAccess(Unknown Source)  71.    at java.lang.reflect.Field.doSecurityCheck(Unknown Source)  72.    at java.lang.reflect.Field.getFieldAccessor(Unknown Source)  73.    at java.lang.reflect.Field.set(Unknown Source)  74.    at ognl.OgnlRuntime.setFieldValue(OgnlRuntime.java:1655)  

引起這種原因就是屬性名稱的不規範！！就像上面的錯誤資訊中寫出的，"nTitle"這樣的屬性名稱產生set和get方法是不規範的！所以struts2用DomainModel傳遞參數，會引起struts2的"誤會"！！是不是很糾結啊