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发表于 2006-10-27 17:21 |只看该作者 |倒序浏览

我写了一个自定义validate的例子出现了一下的例子
Unhandled exception thrown during validation
java.lang.NullPointerException
   at validator.myValidator.ValidationEqual.validateTwoFields(ValidationEqu
l.java:26)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
ava:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
orImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at org.apache.commons.validator.ValidatorAction.executeValidationMethod(
alidatorAction.java:567)
   at org.apache.commons.validator.Field.validateForRule(Field.java:827)
   at org.apache.commons.validator.Field.validate(Field.java:906)
   at org.apache.commons.validator.Form.validate(Form.java:174)
   at org.apache.commons.validator.Validator.validate(Validator.java:367)
   at org.apache.struts.validator.ValidatorForm.validate(ValidatorForm.java
110)
   at org.apache.struts.action.RequestProcessor.processValidate(RequestProc
ssor.java:92

   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.ja
a:204)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:119
)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
cationFilterChain.java:237)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
lterChain.java:157)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
lve.java:214)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
Context.java:104)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
:520)
   at org.apache.catalina.core.StandardContextValve.invokeInternal(Standard
ontextValve.java:19

   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
lve.java:152)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
Context.java:104)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
:520)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
va:137)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
Context.java:104)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
va:11

   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
Context.java:102)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
:520)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
e.java:109)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
Context.java:104)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
:520)
   at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)

   at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:16
)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
799)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
sConnection(Http11Protocol.java:705)
   at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java
577)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ol.java:683)

validation.xml文件为下边内容
<field property="userId" depends="twofields">
<arg0 key="UserId"/>
<arg1 key="

ost Code"/>
<var>
<var-name>secondProperty</var-name>
<var-value>postCode</var-value>
</var>
</field>
我有个文本域的name="userId" 另一个文本域的name="postCode"我想验证userId和postCode文本内容必须一样。

validation.xml文件内容为：

   <validator name="twofields"
   classname="validator.myValidator.ValidationEqual"
      method="validateTwoFields"
   methodParams="java.lang.Object,
   org.apache.commons.validator.ValidatorAction,
   org.apache.commons.validator.Field,
   org.apache.struts.action.ActionErrors,
   javax.servlet.http.HttpServletRequest"
      depends="required"
   msg="errors.twofields"
   />
大哥们帮我看看啊！