Struts开发异常-3

严重: Servlet.service() for servlet jsp threw exception
javax.servlet.jsp.JspException: Invalid argument looking up property user.name of bean org.apache.struts.taglib.html.BEAN
 at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:959)
 at org.apache.struts.taglib.html.BaseFieldTag.prepareValue(BaseFieldTag.java:121)
 at org.apache.struts.taglib.html.BaseFieldTag.renderInputElement(BaseFieldTag.java:102)
 at org.apache.struts.taglib.html.BaseFieldTag.doStartTag(BaseFieldTag.java:81)
 at org.apache.jsp.form.user_jsp._jspx_meth_html_005ftext_005f0(user_jsp.java:143)
 at org.apache.jsp.form.user_jsp._jspx_meth_html_005fform_005f0(user_jsp.java:108)
 at org.apache.jsp.form.user_jsp._jspService(user_jsp.java:76)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:386)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 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:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
 at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:864)
 at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
 at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1665)
 at java.lang.Thread.run(Thread.java:662)

 

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错误提示，找不到 user.name 属性。实际是个假像，实际上因为formBean的bean属性没有被初始化，所以会出现上述错误

解决办法是，将bean放入formBean之前，先将其初始化。

 

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.yourcompany.struts.form;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import com.entity.Userinfo;

/**
 * MyEclipse Struts
 * Creation date: 09-20-2011
 *
 * XDoclet definition:
 * @struts.form name="userForm"
 */
public class UserForm extends ActionForm {
 /*
  * Generated fields
  */

 /** user property */
 //private Userinfo user;  //原来的
 private Userinfo user = new Userinfo();

 /*
  * Generated Methods
  */

 /**
  * Method validate
  * @param mapping
  * @param request
  * @return ActionErrors
  */
 public ActionErrors validate(ActionMapping mapping,
   HttpServletRequest request) {
  // TODO Auto-generated method stub
  return null;
 }

 /**
  * Method reset
  * @param mapping
  * @param request
  */
 public void reset(ActionMapping mapping, HttpServletRequest request) {
  // TODO Auto-generated method stub
 }

 /**
  * Returns the user.
  * @return Userinfo
  */
 public Userinfo getUser() {
  return user;
 }

 /**
  * Set the user.
  * @param user The user to set
  */
 public void setUser(Userinfo user) {
  this.user = user;
 }
}