点击验证码时报ognl.InappropriateExpressionException:
警告: Error setting expression '0.3589586149635512' with value '[Ljava.lang.String;@fe89a'ognl.InappropriateExpressionException: Inappropriate OGNL expression: 0.3589586149635512
at ognl.SimpleNode.setValueBody(SimpleNode.java:312)
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:198)
at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:161)
at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:149)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:276)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:187)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
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:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
在SSI框架中，做了一个图形验证码，页面加载时没问题，但点击验证码时，却出现了上述异常。请指点。谢谢。
JSP代码：
Ext.onReady(function(){ var fp= new Ext.FormPanel({ frame: true, title:'用户登录', labelAlign: 'right', //collapsible: true, labelWidth: 85, width:340, waitMsgTarget: true,items: [ new Ext.form.FieldSet({ title: '登录信息', autoHeight: true, defaultType: 'textfield', items: [ { fieldLabel: '用户账号', name: 'username', minLength: 4, maxLength: 12, allowBlank:false, blankText:'不能为空', width:190 }, { fieldLabel: '用户密码', name: 'pwd', minLength: 3, maxLength: 12, inputType: 'password', allowBlank:false, blankText:'不能为空', width:190 },{ name: 'code', fieldLabel: '验证码', maxLength: 5, minLength: 5, width: 100, allowBlank:false, blankText:'验证码不能为空!' }] }) ] }); var reset = fp.addButton({ text:"重置", disabled:false }); var submit = fp.addButton({ text:"提交", disabled:false, handler:function(){ if(fp.getForm().isValid()){ Ext.Ajax.request({ url:"/book/login/LoginServlet", //提交的数组 params:{ username:Ext.get("username").dom.value, pwd:Ext.get("pwd").dom.value, code:Ext.get("code").dom.value }, //成功时回调 success:function(response,options){ alert(123); var res = response.responseText; if(res.indexOf("1")!= -1){ fp.getForm().getEl().dom.action="/book/login/redirect"; fp.getForm().getEl().dom.submit(); }else if(res.indexOf("2")!= -1){ Ext.Msg.alert('失败','登录失败，请查看验证码是否正确！'); }else{ Ext.Msg.alert('失败','登录失败，请查看帐号或密码是否错误！'); } } }); } } }); reset.on("click",function(){ fp.getForm().reset(); }); fp.render("login"); var bd = Ext.getDom('code'); var bd2 = Ext.get(bd.parentNode); bd2.createChild([ { tag: 'span', html: '<a href="javascript:newcode();">', style:'padding-left:20px' }, { tag: 'img', id: 'safecode', src: 'registerCode.action', align: 'absbottom' } ]);}); function newcode(){ var verify = document.getElementById("safecode"); verify.setAttribute("src","registerCode.action?"+Math.random());}
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