Struts2：格式错误的OGNL表达

在我的JSP中，我使用了一个名为TagEdit的插件，它必须有一个带有“name =’tag []’”的输入文本字段，如下所示：

但是当我提交它时，struts2抛出了这个exception：

 WARNING: Error setting expression 'tag[]' with value '[Ljava.lang.String;@6c2a78' ognl.ExpressionSyntaxException: Malformed OGNL expression: tag[] [ognl.ParseException: Encountered " "]" "] "" at line 1, column 5. Was expecting one of: ":" ... "not" ... "+" ... "-" ... "~" ... "!" ... "(" ... "true" ... "false" ... "null" ... "#this" ... "#root" ... "#" ... "[" ... "{" ... "@" ... "new" ...  ...  ... "\'" ... "`" ... "\"" ...  ...  ... ] at ognl.Ognl.parseExpression(Ognl.java:112) at com.opensymphony.xwork2.ognl.OgnlUtil.compile(OgnlUtil.java:225) 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:292) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:203) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:211) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:90) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) 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:249) at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:192) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:510) at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:434) 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(Unknown Source) Caused by: ognl.ParseException: Encountered " "]" "] "" at line 1, column 5. Was expecting one of: ":" ... "not" ... "+" ... "-" ... "~" ... "!" ... "(" ... "true" ... "false" ... "null" ... "#this" ... "#root" ... "#" ... "[" ... "{" ... "@" ... "new" ...  ...  ... "\'" ... "`" ... "\"" ...  ...  ... at ognl.OgnlParser.generateParseException(OgnlParser.java:3172) at ognl.OgnlParser.jj_consume_token(OgnlParser.java:3051) at ognl.OgnlParser.unaryExpression(OgnlParser.java:1236) at ognl.OgnlParser.multiplicativeExpression(OgnlParser.java:971) at ognl.OgnlParser.additiveExpression(OgnlParser.java:894) at ognl.OgnlParser.shiftExpression(OgnlParser.java:750) at ognl.OgnlParser.relationalExpression(OgnlParser.java:508) at ognl.OgnlParser.equalityExpression(OgnlParser.java:405) at ognl.OgnlParser.andExpression(OgnlParser.java:352) at ognl.OgnlParser.exclusiveOrExpression(OgnlParser.java:299) at ognl.OgnlParser.inclusiveOrExpression(OgnlParser.java:246) at ognl.OgnlParser.logicalAndExpression(OgnlParser.java:193) at ognl.OgnlParser.logicalOrExpression(OgnlParser.java:140) at ognl.OgnlParser.conditionalTestExpression(OgnlParser.java:101) at ognl.OgnlParser.assignmentExpression(OgnlParser.java:64) at ognl.OgnlParser.expression(OgnlParser.java:23) at ognl.OgnlParser.index(OgnlParser.java:2336) at ognl.OgnlParser.navigationChain(OgnlParser.java:1331) at ognl.OgnlParser.unaryExpression(OgnlParser.java:1196) at ognl.OgnlParser.multiplicativeExpression(OgnlParser.java:971) at ognl.OgnlParser.additiveExpression(OgnlParser.java:894) at ognl.OgnlParser.shiftExpression(OgnlParser.java:750) at ognl.OgnlParser.relationalExpression(OgnlParser.java:508) at ognl.OgnlParser.equalityExpression(OgnlParser.java:405) at ognl.OgnlParser.andExpression(OgnlParser.java:352) at ognl.OgnlParser.exclusiveOrExpression(OgnlParser.java:299) at ognl.OgnlParser.inclusiveOrExpression(OgnlParser.java:246) at ognl.OgnlParser.logicalAndExpression(OgnlParser.java:193) at ognl.OgnlParser.logicalOrExpression(OgnlParser.java:140) at ognl.OgnlParser.conditionalTestExpression(OgnlParser.java:101) at ognl.OgnlParser.assignmentExpression(OgnlParser.java:64) at ognl.OgnlParser.expression(OgnlParser.java:23) at ognl.OgnlParser.topLevelExpression(OgnlParser.java:15) at ognl.Ognl.parseExpression(Ognl.java:110) ... 52 more /-- Encapsulated exception ------------\ ognl.ParseException: Encountered " "]" "] "" at line 1, column 5. Was expecting one of: ":" ... "not" ... "+" ... "-" ... "~" ... "!" ... "(" ... "true" ... "false" ... "null" ... "#this" ... "#root" ... "#" ... "[" ... "{" ... "@" ... "new" ...  ...  ... "\'" ... "`" ... "\"" ...  ...  ... at ognl.OgnlParser.generateParseException(OgnlParser.java:3172) at ognl.OgnlParser.jj_consume_token(OgnlParser.java:3051) at ognl.OgnlParser.unaryExpression(OgnlParser.java:1236) at ognl.OgnlParser.multiplicativeExpression(OgnlParser.java:971) at ognl.OgnlParser.additiveExpression(OgnlParser.java:894) at ognl.OgnlParser.shiftExpression(OgnlParser.java:750) at ognl.OgnlParser.relationalExpression(OgnlParser.java:508) at ognl.OgnlParser.equalityExpression(OgnlParser.java:405) at ognl.OgnlParser.andExpression(OgnlParser.java:352) at ognl.OgnlParser.exclusiveOrExpression(OgnlParser.java:299) at ognl.OgnlParser.inclusiveOrExpression(OgnlParser.java:246) at ognl.OgnlParser.logicalAndExpression(OgnlParser.java:193) at ognl.OgnlParser.logicalOrExpression(OgnlParser.java:140) at ognl.OgnlParser.conditionalTestExpression(OgnlParser.java:101) at ognl.OgnlParser.assignmentExpression(OgnlParser.java:64) at ognl.OgnlParser.expression(OgnlParser.java:23) at ognl.OgnlParser.index(OgnlParser.java:2336) at ognl.OgnlParser.navigationChain(OgnlParser.java:1331) at ognl.OgnlParser.unaryExpression(OgnlParser.java:1196) at ognl.OgnlParser.multiplicativeExpression(OgnlParser.java:971) at ognl.OgnlParser.additiveExpression(OgnlParser.java:894) at ognl.OgnlParser.shiftExpression(OgnlParser.java:750) at ognl.OgnlParser.relationalExpression(OgnlParser.java:508) at ognl.OgnlParser.equalityExpression(OgnlParser.java:405) at ognl.OgnlParser.andExpression(OgnlParser.java:352) at ognl.OgnlParser.exclusiveOrExpression(OgnlParser.java:299) at ognl.OgnlParser.inclusiveOrExpression(OgnlParser.java:246) at ognl.OgnlParser.logicalAndExpression(OgnlParser.java:193) at ognl.OgnlParser.logicalOrExpression(OgnlParser.java:140) at ognl.OgnlParser.conditionalTestExpression(OgnlParser.java:101) at ognl.OgnlParser.assignmentExpression(OgnlParser.java:64) at ognl.OgnlParser.expression(OgnlParser.java:23) at ognl.OgnlParser.topLevelExpression(OgnlParser.java:15) at ognl.Ognl.parseExpression(Ognl.java:110) at com.opensymphony.xwork2.ognl.OgnlUtil.compile(OgnlUtil.java:225) 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:292) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:203) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:211) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:90) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) 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:249) at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:192) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:510) at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:434) 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(Unknown Source) \--------------------------------------/ 

struts.xml：

      ^tag\..*     ajax_result/common/actionMessage/action_message_result_error.jsp ajax_result/common/actionMessage/action_message_result_error.jsp   

行动：

 public class tagAction extends ActionSupport { private static final long serialVersionUID = 1L; public String execute() { try { Map params = (Map) ActionContext.getContext().getParameters(); String[] entries1 = (String[]) params.get("tag[3-a]"); String[] entries2 = (String[]) params.get("tag[]"); for(int i=0;i<entries1.length;i++) System.out.println(entries1[i]); for(int i=0;i<entries2.length;i++) System.out.println(entries2[i]); } catch (Exception e) { addActionError(e.getMessage()); e.printStackTrace(); return "error"; } return "success"; } } 

我该怎么做好友？ 谢谢你们