java.lang.IllegalArgumentException: argument type mismatch
update_member.jsp页面部分代码是(manage是工程名字)：
<form name= "form " method= "post " action= "/manage/member.do?method=update_member ">
<table width= "90% " border= "0 " align= "center " class= "title ">
<tr>
<td colspan= "2 " class= "title "> 修改会员 </td>
</tr>
<tr>
<td width= "30% " class= "td "> <div align= "right "> 用户名： </div> </td>
<td width= "70% " class= "td "> <input name= "userName " type= "text " value= " " size= "20 "/> </td>
</tr>
<tr>
<td class= "td "> <div align= "right "> 性别： </div> </td>
<td class= "td ">
<select name= "sex " size= "1 ">
<option value= "1 "> 男 </option>
<option value= "0 "> 女 </option>
</select> </td>
</tr>
<tr>
<td class= "td "> <div align= "right "> 出生年月日： </div> </td>
<td class= "td "> <input name= "birthday " type= "text " value= " " size= "20 "/> </td>
</tr>
<tr>
<td class= "td "> <div align= "right "> 是否关闭此会员： </div> </td>
<td class= "td "> <select name= "manage " size= "1 ">
<option value= "0 " > 是 </option>
<option value= "1 " > 否 </option>
</select> </td>
</tr>
<tr>
<td class= "td "> <div align= "right "> 注册时间： </div> </td>
<td class= "td "> <input name= "date " type= "text " value= " " size= "20 "/> </td>
</tr>
<tr>
<td align= "right " class= "td "> <input type= "submit " name= "submit " value= "修改 "/> </td>
<td class= "td "> <input type= "reset " name= "Submit22 " value= "重置 " /> </td>
</tr>
</table>
</form>
struts-config.xml中相应的代码：
<action
attribute= "memberForm "
name= "memberForm "
parameter= "method "
path= "/member "
scope= "request "
type= "com.taolala.action.MemberAction ">
<forward name= "succcess " path= "/manage_member.jsp " />
</action>
我在MemberAction中刚开始打印一句话（System.out.println( "找不到啊！ ")），但根本就到不了哪就抛异常，异常如下：
2007-9-4 18:41:59 org.apache.commons.beanutils.PropertyUtilsBean invokeMethod
严重: Method invocation failed.
java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.commons.beanutils.PropertyUtilsBean.invokeMethod(PropertyUtilsBean.java:1773)
at org.apache.commons.beanutils.PropertyUtilsBean.setSimpleProperty(PropertyUtilsBean.java:1759)
at org.apache.commons.beanutils.PropertyUtilsBean.setNestedProperty(PropertyUtilsBean.java:1648)
at org.apache.commons.beanutils.PropertyUtilsBean.setProperty(PropertyUtilsBean.java:1677)
at org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:1022)
at org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:811)
at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:298)
at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:493)
at org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:805)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
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:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Thread.java:595)
2007-9-4 18:41:59 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet action threw exception
java.lang.IllegalArgumentException: Cannot invoke com.taolala.form.MemberForm.setDate - argument type mismatch
at org.apache.commons.beanutils.PropertyUtilsBean.invokeMethod(PropertyUtilsBean.java:1778)
at org.apache.commons.beanutils.PropertyUtilsBean.setSimpleProperty(PropertyUtilsBean.java:1759)
at org.apache.commons.beanutils.PropertyUtilsBean.setNestedProperty(PropertyUtilsBean.java:1648)
at org.apache.commons.beanutils.PropertyUtilsBean.setProperty(PropertyUtilsBean.java:1677)
at org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:1022)
at org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:811)
at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:298)
at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:493)
at org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:805)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
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:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Thread.java:595)
[解决办法]
看异常是setDate出错。请检查下setDate的参数及类型是否正确吧。若你用的setDate(Date date)，不妨改成setDate(String date)试下。
