argument type mismatch问题解决

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: BeanUtils.populate	org.apache.struts.util.RequestUtils.populate(RequestUtils.java:495)	org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:804)	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)	javax.servlet.http.HttpServlet.service(HttpServlet.java:689)	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)	com.weihua.common.util.CharsetFilter.doFilter(CharsetFilter.java:35)root cause 

java.lang.IllegalArgumentException: argument type mismatch	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	java.lang.reflect.Method.invoke(Method.java:324)	org.apache.commons.beanutils.PropertyUtils.setSimpleProperty(PropertyUtils.java:1789)	org.apache.commons.beanutils.PropertyUtils.setNestedProperty(PropertyUtils.java:1684)	org.apache.commons.beanutils.PropertyUtils.setProperty(PropertyUtils.java:1713)	org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:934)	org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:729)	org.apache.struts.util.RequestUtils.populate(RequestUtils.java:493)	org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:804)	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)	javax.servlet.http.HttpServlet.service(HttpServlet.java:689)	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)	com.weihua.common.util.CharsetFilter.doFilter(CharsetFilter.java:35)note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

程序中用了FormFile，报上面的错，后面发现是jsp页面上，要在提交的地方：

<FORM id=frmpic name=frmpic action="addPhoto.do" onsubmit="return check()"  method=post
        encType=multipart/form-data>

加上：encType=multipart/form-data，否则报上面的错误。



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