Spring mvc 抛出异常 - 非法状态异常:在 jsp 页面中使用表单 tld 时，既不是 BindingResu - Spring mvc throwing exception- IllegalStateException: Neither BindingResult nor plain target object for bean , when using form tld in jsp page 小贝子编程网

当我在jsp页面中使用纯html时，应用程序工作正常，因为我在jsp中添加表单标签，它给出了异常，我已经将我的代码和异常粘贴在这里，请帮助我.我无法解决这个问题，并且从现在卡住了3天。这里出了什么问题

我的调度程序-servlet ：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans     
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context.xsd">
<mvc:annotation-driven />
<context:component-scan
base-package="com.shweta.*" />
<mvc:default-servlet-handler />
<mvc:view-controller path="/" view-name="index"/>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
<property name="prefix">
<value>/WEB-INF/jspPages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>

我的网站.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>SpringMVCForm</display-name>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

我的控制器类：

package com.shweta.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ControllerAdvice;
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.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.shweta.model.Employee;
import com.shweta.model.Test;
@Controller
//@ControllerAdvice
@RequestMapping("/employee")
public class EmployeeController {
@RequestMapping(value="/submitForm", method=RequestMethod.POST)
public String formSubmission(@ModelAttribute("employee") Employee employee,BindingResult bindingResult)
{
System.out.println("entered in @RequestMapping");
System.out.println("printing employee from modelattribute");
System.out.println(employee.getEmail());
System.out.println(employee.getFirstName());
System.out.println(employee.getLastName());
System.out.println(employee.getSalary());
//modelMap.addAttribute("employee", employee);
return "EmployeeWelcome";
}
}

我的员工 JSP 页面：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> 
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Employee page</title>
</head>
<body>
<h1>${msg}</h1>
<%-- <form:form action="employee/submitForm" method="post" > --%>
<form:form action="${pageContext.request.contextPath}/employee/submitForm" method="post" modelAttribute="employee">
<!-- <div>
First name:
<input type="text" name="firstName">
</div> -->
<div>
First name:
<form:input path="firstName"/>
</div>
<div>
Last name:
<input type="text" name="lastName">
</div>
<div>
E-mail:
<input type="email" name="email">
</div>
<div>
Salary:
<input type="text" name="salary">
</div>
<div class="button">
<button type="submit">Submit</button>
</div>
</form:form>
</body>
</html>

我的员工模型类

package com.shweta.model;
public class Employee {
String email;
String firstName;
String lastName;
Address address;
long salary;
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public long getSalary() {
return salary;
}
public void setSalary(long salary) {
this.salary = salary;
}
}

HTTP Status 500 – Internal Server Error
Type Exception Report
Message An exception occurred processing JSP page /WEB-INF/jspPages/EmployeeForm.jsp at line 22
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/jspPages/EmployeeForm.jsp at line 22
19:   </div> -->
20:   <div>
21:     First name:
22:     <form:input path="firstName"/>
23:   </div>
24:   <div>
25:     Last name:

异常代码段

Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:613)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:505)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:170)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1370)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1116)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1055)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908)
javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'employee' available as request attribute
org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:153)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:177)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:198)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:163)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId(AbstractDataBoundFormElementTag.java:148)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId(AbstractDataBoundFormElementTag.java:138)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:121)
org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:459)
org.springframework.web.servlet.tags.form.InputTag.writeTagContent(InputTag.java:356)
org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:86)
org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:83)
org.apache.jsp.WEB_002dINF.jspPages.EmployeeForm_jsp._jspx_meth_form_005finput_005f0(EmployeeForm_jsp.java:214)
org.apache.jsp.WEB_002dINF.jspPages.EmployeeForm_jsp._jspx_meth_form_005fform_005f0(EmployeeForm_jsp.java:158)
org.apache.jsp.WEB_002dINF.jspPages.EmployeeForm_jsp._jspService(EmployeeForm_jsp.java:104)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:472)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:170)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1370)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1116)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1055)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908)
javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Note The full stack trace of the root cause is available in the server logs.
Apache Tomcat/7.0.94

在渲染 jsp 之前，你必须将 bean 放入模型中。例如，你需要在下面的EmployeeController声明一个方法，并通过该方法访问 jsp。

@RequestMapping("index")
public String index(Model model) {
model.addAttribute("employee", new Employee());
return "EmployeeForm";
}

类似问题：BindingResult 和 Bean 名称的纯目标对象都不能用作请求属性

您尚未将名为"employee"的 bean 放入模型中。您应该在渲染视图之前注入一个。向控制器添加一个方法来执行此操作。

Spring mvc 抛出异常 - 非法状态异常:在 jsp 页面中使用表单 tld 时，既不是 BindingResu

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