我正在尝试使用 spring mvc +maven+ jpa hibernate 创建一个简单的项目。
我的jsp页面是:
<%@taglib uri="http://www.springframework.org/tags" prefix="spring"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<div>
<form:form action="contact.html" method="post" commandName="contact" >
<div>
<label for="firstname">First Name</label>
<form:input path="firstname"/>
<form:errors path="firstname" cssClass="error"/>
</div>
<div>
<label for="lastname">Last Name</label>
<form:input path="lastname"/>
<form:errors path="lastname" cssClass="error"/>
</div>
<div>
<label for="telephone">Telephone</label>
<form:input path="telephone"/>
<form:errors path="telephone" cssClass="error"/>
</div>
<div>
<label for="email">Email</label>
<form:input path="email"/>
<form:errors path="email" cssClass="error"/>
</div>
<div>
<form:button name="submit" value="submit">Add Contact</form:button>
</div>
我的contact.html控制器:
package com.corasent.contacts.controllers;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import com.corasent.contacts.form.Contact;
import com.corasent.contacts.service.ContactService;
@Controller
@RequestMapping("contact.html")
public class ContactManagerController {
@Autowired
ContactService cs;
@RequestMapping(method = RequestMethod.GET)
public String contactController()
{
System.out.println("In controller");
ModelMap map=new ModelMap();
Contact contact=new Contact();
map.addAttribute("contact", contact);
return "contacts";
}
@RequestMapping(method=RequestMethod.POST)
public ModelAndView getInfo(@ModelAttribute Contact contact, BindingResult result, HttpServletRequest req)
{
ModelAndView mv=new ModelAndView("contacts");
String name=contact.getFirstname();
System.out.println("name is="+name);
cs.validate(contact, result);
if(result.hasErrors())
{
return mv ;
}
System.out.println("in post method");
return mv;
}
public ContactService getCs() {
return cs;
}
public void setCs(ContactService cs) {
this.cs = cs;
}
}
我知道 jsp 中的 commandName 是必须传递给控制器的 bean。在控制器中启动了相同的 bean,但似乎无法正常工作。它给了我上述错误。我也在粘贴stackTrace。
ERROR: org.springframework.web.servlet.tags.form.InputTag - Neither BindingResult nor plain target object for bean name 'contact' available as request attribute
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'contact' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:179)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:199)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:165)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId(AbstractDataBoundFormElementTag.java:152)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId(AbstractDataBoundFormElementTag.java:143)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:127)
at org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:421)
at org.springframework.web.servlet.tags.form.InputTag.writeTagContent(InputTag.java:142)
at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:103)
at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80)
at org.apache.jsp.WEB_002dINF.views.jsp.contacts_jsp._jspx_meth_form_005finput_005f0(contacts_jsp.java:272)
at org.apache.jsp.WEB_002dINF.views.jsp.contacts_jsp._jspService(contacts_jsp.java:100)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:679)
12 Apr, 2013 12:36:53 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jsp] in context with path [/contacts] threw exception [An exception occurred processing JSP page /WEB-INF/views/jsp/contacts.jsp at line 10
7:
8: <div>
9: <label for="firstname">First Name</label>
10: <form:input path="firstname"/>
11: <form:errors path="firstname" cssClass="error"/>
12: </div>
提前致谢