无法得到ActionForm的异常

HTTP Status 500 -

---

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:816)

	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)

	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)

	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)

	javax.servlet.http.HttpServlet.service(HttpServlet.java:710)

	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

	com.yenange.filter.EncodingFilter.doFilter(EncodingFilter.java:21)

root cause

java.lang.IllegalArgumentException: No bean specified

	org.apache.commons.beanutils.PropertyUtilsBean.getPropertyDescriptor(PropertyUtilsBean.java:751)

	org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:937)

	org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:811)

	org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:298)

	org.apache.struts.util.RequestUtils.populate(RequestUtils.java:493)

	org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:816)

	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)

	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)

	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)

	javax.servlet.http.HttpServlet.service(HttpServlet.java:710)

	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

	com.yenange.filter.EncodingFilter.doFilter(EncodingFilter.java:21)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.14 logs.

其实很简单，在ActionForm中没有new 出来，所以没有实体无法赋值！