在我的JSP中，我使用的是名为TagEdit的插件，它必须有一个输入文本字段，其中包含“name ='tag []'”，如下所示：
<s:form theme="simple" action="myActionn" method="post">
<s:textfield theme="simple" name="tag[]" value="" cssClass="tag"/>
<sj:submit targets="actionMessageResult"/>
</s:form>
但是当我提交它时，struts2抛出了这个异常：
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" ...
<IDENT> ...
<DYNAMIC_SUBSCRIPT> ...
"\'" ...
"`" ...
"\"" ...
<INT_LITERAL> ...
<FLT_LITERAL> ...
]
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" ...
<IDENT> ...
<DYNAMIC_SUBSCRIPT> ...
"\'" ...
"`" ...
"\"" ...
<INT_LITERAL> ...
<FLT_LITERAL> ...
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" ...
<IDENT> ...
<DYNAMIC_SUBSCRIPT> ...
"\'" ...
"`" ...
"\"" ...
<INT_LITERAL> ...
<FLT_LITERAL> ...
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：
<package name="default" extends="struts-default" >
<interceptors>
<interceptor-stack name="defaultStack">
<interceptor-ref name="params">
<param name="excludeParams">^tag\..*</param>
</interceptor-ref>
</interceptor-stack>
</interceptors>
<action name="myActionn" class="com.fap.controller.common.tagAction">
<result name="success">ajax_result/common/actionMessage/action_message_result_error.jsp</result>
<result name="error">ajax_result/common/actionMessage/action_message_result_error.jsp</result>
</action>
</package>
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";
}
}