Spring bean名称既不是BindingResult，也不是普通的目标对象_Spring_Spring Mvc_Binding_Annotations

Spring bean名称既不是BindingResult，也不是普通的目标对象

spring spring-mvc binding

Spring bean名称既不是BindingResult，也不是普通的目标对象,spring,spring-mvc,binding,annotations,Spring,Spring Mvc,Binding,Annotations,我是Spring框架的新手。我正在做一个关于Spring3MVC的教程，我在运行web时遇到了一个异常例外情况： java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'contact1' available as request attribute org.springframework.web.servlet.support.BindStatus.<in

我是Spring框架的新手。我正在做一个关于Spring3MVC的教程，我在运行web时遇到了一个异常

例外情况：

java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'contact1' available as request attribute
org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:174)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:194)
org.springframework.web.servlet.tags.form.LabelTag.autogenerateFor(LabelTag.java:129)
org.springframework.web.servlet.tags.form.LabelTag.resolveFor(LabelTag.java:119)
org.springframework.web.servlet.tags.form.LabelTag.writeTagContent(LabelTag.java:89)
org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:102)
org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:79)
org.apache.jsp.contact_jsp._jspx_meth_form_005flabel_005f0(contact_jsp.java:222)
org.apache.jsp.contact_jsp._jspx_meth_form_005fform_005f0(contact_jsp.java:144)
org.apache.jsp.contact_jsp._jspService(contact_jsp.java:93)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

index.jsp

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
    <jsp:forward page="contact.jsp" ></jsp:forward>
</body>

contact.jsp

<%@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"%>
    <html>
    <head>
    <title>Spring 3 MVC Series - Contact Manager | viralpatel.net</title>
    </head>
    <body>

<h2>Contact Manager</h2>

<form:form action="/contact.jsp" method="POST" modelAttribute="contact1">

    <table>
        <tr>
            <td><form:label path="firstname">
                    <spring:message code="label.firstname" />
                </form:label></td>
            <td><form:input path="firstname" /></td>
        </tr>
        <tr>
            <td><form:label path="lastname">
                    <spring:message code="label.lastname" />
                </form:label></td>
            <td><form:input path="lastname" /></td>
        </tr>
        <tr>
            <td><form:label path="email">
                    <spring:message code="label.email" />
                </form:label></td>
            <td><form:input path="email" /></td>
        </tr>
        <tr>
            <td><form:label path="telephone">
                    <spring:message code="label.telephone" />
                </form:label></td>
            <td><form:input path="telephone" /></td>
        </tr>
        <tr>
            <td colspan="2"><input type="submit"
                value="<spring:message code="label.addcontact"/>" /></td>
        </tr>
    </table>
</form:form>


<h3>Contacts</h3>
<c:if test="${!empty contactList}">
    <table class="data">
        <tr>
            <th>Name</th>
            <th>Email</th>
            <th>Telephone</th>
            <th>&nbsp;</th>
        </tr>
        <c:forEach items="${contactList}" var="contact">
            <tr>
                <td>${contact.lastname}, ${contact.firstname}</td>
                <td>${contact.email}</td>
                <td>${contact.telephone}</td>
                <td><a href="delete/${contact.id}">delete</a></td>
            </tr>
        </c:forEach>
    </table>
</c:if>


Spring 3 MVC系列-联系人管理器| viralpatel.net
联络经理
联络
名称
电子邮件
电话
${contact.lastname}，${contact.firstname}
${contact.email}
${联系电话}

springapp-servlet.xml

<?xml  version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
    http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

<context:annotation-config />

<!-- Scan all java class -->
<context:component-scan base-package="*" />


<bean id="jspViewResolver"
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass"
        value="org.springframework.web.servlet.view.JstlView" />
    <property name="prefix" value="/WEB-INF/" />
    <property name="suffix" value=".jsp" />
</bean>

<bean id="simpleUrlMapping"
    class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
    <property name="mappings">
        <props>
            <prop key="/contact.jsp">contact</prop>
        </props>
    </property>
</bean>

<bean id="contact" name="contact" class="controller.ContactController" />

<!--    Declare DAO and Service refer to DAOImpl and ServiceImpl -->
<bean name="contactService" class="service.ContactServiceImpl"
    autowire="constructor" />
<bean name="contactDAO" class="dao.ContactDAOImpl" autowire="constructor" />


<bean id="messageSource"
    class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="basename" value="classpath:messages" />
    <property name="defaultEncoding" value="UTF-8" />
</bean>
<bean id="propertyConfigurer"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
    p:location="/WEB-INF/jdbc.properties" />

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
    destroy-method="close" p:driverClassName="${jdbc.driverClassName}"
    p:url="${jdbc.databaseurl}" p:username="${jdbc.username}" p:password="${jdbc.password}" />


<bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="configLocation">
        <value>classpath:hibernate.cfg.xml</value>
    </property>
    <property name="configurationClass">
        <value>org.hibernate.cfg.AnnotationConfiguration</value>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">${jdbc.dialect}</prop>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>
</bean>

<tx:annotation-driven />
<bean id="transactionManager"
    class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>


接触
类路径：hibernate.cfg.xml
org.hibernate.cfg.AnnotationConfiguration
${jdbc.dial}
真的

web.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"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
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">
<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<servlet>
    <servlet-name>springapp</servlet-name>
    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>springapp</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/springapp-servlet.xml</param-value>
</context-param>

<listener>
    <listener-class>
           org.springframework.web.context.ContextLoaderListener
     </listener-class>
</listener>


index.jsp
springapp
org.springframework.web.servlet.DispatcherServlet
1.
springapp
/
上下文配置位置
/WEB-INF/springapp-servlet.xml
org.springframework.web.context.ContextLoaderListener

请帮我修一下。我知道出现这个问题是因为jsp页面找不到modelAttribue，但我不知道如何修复它

谢谢

请提供您的web.xml条目，它实际上映射了Dispacher servlet。我知道你的问题是什么，但取决于映射，我可以建议你的确切变化。我复制了你们的代码并做了一些修改，现在模型已经绑定了。你能看看这个plz吗

您的jsp

<form:form action="/web/contact.jsp/add" method="POST" commandName="contact1">

xml映射是

<servlet>
    <servlet-name>springapp</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>springapp</servlet-name>
    <url-pattern>/web/*</url-pattern>
</servlet-mapping>


springapp
org.springframework.web.servlet.DispatcherServlet
1.
springapp
/网/*

我调用此url访问表单/web/contact.jsp。这将调用GET方法并提供空白表单，其中包含bind commandclass name=“contact1”

这意味着从控制器传递的模型不包含名为

contact1

的属性。加

model.addAttribute("contact1", new Contact());

返回此视图的控制器。
DispatcherServlet获取每个模型属性，并将它们作为请求属性传递给视图。由于您在型号中缺少

联系人1

，因此其给出的错误如下

 Neither BindingResult nor plain target object for bean name 'contact1' available as request attribute

并检查控制器映射。调试您的应用程序并检查控制器是否被调用，以及

contact1

是否成功添加到模型中

编辑：

您使用的是

commandName

和

modeldattribute

，这两种方法最终都达到了相同的目的。删除

commandName

并仅使用

moedlAttribute

，因为

ModelAttribute

取代

CommandAttribute。

查看链接了解更多详细信息

以调试模式运行应用程序。检查控制器是否调用方法

public String showForm(ModelMap model) {}.

当您的jsp文件未获得

modeldattribute=“contact1”

注释时，就会出现此问题。我添加了web.xml。请让我知道您的想法，Rohani在表单操作中添加了“/web”，因为我的springapp servlet映射在url“/web/*”上，所以在本例中添加您映射的url。谢谢Rohan。我用你的建议解决了我的问题。@NhanLeQuang:你确定调用了相同的控制器吗？试着调试代码，看看行是否执行时没有任何错误。@NhanLeQuang:刚才注意到jsp中有

commandName

和

modeldattribute

。尝试删除

commandName

当我运行web时，没有发现错误，因为web似乎没有执行showForm（）。我认为我的问题是绑定，但我找不到解决方案。@NhanLeQuang:问题在于控制器映射。添加向控制器发出请求的文件。我添加了index.jsp。请查看我的第一篇帖子，这是我的问题。我的应用程序不调用showForm（）方法。你能给我一些建议吗？

public String showForm(ModelMap model) {}.