javax.servlet.ServletException: BeanUtils.populate

javax.servlet.ServletException: BeanUtils.populate

       具体异常为:

javax.servlet.ServletException: BeanUtils.populate
 org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1254)
 org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:821)
 org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254)
 org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
 com.dg.xxg.util.myServletAction.process(myServletAction.java:24)
 org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

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:585)
 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:1019)
 org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:808)
 org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1252)
 org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:821)
 org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254)
 org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
 com.dg.xxg.util.myServletAction.process(myServletAction.java:24)
 org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
解决办法:
在页面的form标签中加入一个属性: enctype="multipart/form-data"即可解决问题。

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