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问题：

bean名称'login form'的BindingResult和普通目标对象都不能作为请求属性使用

洪星文
2023-03-14

我看过很多类似的帖子，但没有任何东西对我起作用。所以我会把它和我的代码样例一起再次发布。我是Spring MVC的新手，正在尝试使用一个简单的登录表单。但是我一次又一次地得到“BindingResult和bean名称'login form'的普通目标对象都不能作为请求属性”。下面是具有登录表单的index.jsp文件：

index.jsp

<form:form action="login" method="post" modelAttribute="loginForm">
<div class="row text-center">
    <div class="col-md-4 text-right">
        <span>Username</span>
    </div>
    <div class="col-md-6 text-left">
        <form:input type="text" path="username" id="username"/>
    </div>
</div>
<div class="row text-center">
    <div class="col-md-4 text-right">
        <span>Password</span>
    </div>
    <div class="col-md-6 text-left">
        <form:input type="password" path="password" id="password"/>
    </div>
</div>
<div class="row text-center">   
    <div class="col-md-7 col-md-offset-2">                       
        <div id="msgbox">
        </div>
    </div>
</div>
<div class="row text-right">
    <div class="col-md-10">
        <a id="notRegistered">Not registered? Please Sign Up</a>
        <button type="submit" name="login" id="login" class="sign-in-btn">Sign In</button>
    </div>
</div>

UserController如下所示：UserController.java

@Controller
@RequestMapping(value = "/login")
public class UserController{
    @Autowired
    private UserManagementServices userManagementServices;

    //Login form data view/object mapping
    @RequestMapping(method = RequestMethod.GET)
    public String viewLoginDetails(Model model) {
        UserModel userModel = new UserModel();    
        model.addAttribute("loginForm", userModel);

        return "index";
    }
    //Call login validation method using above view object mapping
    @RequestMapping(method = RequestMethod.POST)
    public String getValidateUserLogin(@ModelAttribute("loginForm") UserModel userModel , Map<String, Object> model) {
        UserIdentityLoginQuery userIdentityLoginQuery = new UserIdentityLoginQuery();
        //Get data from object created above and set login query arguments
        userIdentityLoginQuery.setUserName(userModel.getUsername());
        userIdentityLoginQuery.setPassword(userModel.getPassword());

        //Call service layer method to validate user
        userManagementServices.getValidateUserLogin(userIdentityLoginQuery);

        return "home";
    }
}

UserModel如下所示：UserModel.java

public class UserModel {
    private String username;
    private String password;
    private String email;

    //Getters
    public String getUsername(){
        return username;
    }
    public String getPassword(){
        return password;
    }
    public String getEmail(){
        return email;
    }
}

<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<display-name>MME Application</display-name>
<welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
</welcome-file-list>

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

<servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>*.htm</url-pattern>
</servlet-mapping>

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

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

<beans xmlns="http://www.springframework.org/schema/beans"
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-3.0.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd">

<context:component-scan base-package="com.xchanging.platform.controller" />

<bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
    <property name="prefix" value="/WEB-INF/jsp/" />
    <property name="suffix" value=".jsp" />
</bean>

<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

</beans>

<beans xmlns="http://www.springframework.org/schema/beans"
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-3.0.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd">

<bean id="userModel" class="com.grooming.platform.model.UserModel" />   
</beans>

web
    src/main/java
        com.grooming.platform.controller
            UserController.java
        com.grooming.platform.model
            UserModel.java
    src
        main
            webapp
                WEB-INF
                    jsp
                        home.jsp
                    lib
                    mvc-dispatcher-servlet.xml
                    spring-context.xml
                    web.xml
                index.jsp

任何帮助都将非常感谢，因为我已经被困在这里好几天了。

多谢了。

更新

org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 173

170:                                <span>Username</span>
171:                            </div>
172:                            <div class="col-md-6 text-left">
173:                                <form:input type="text" path="username" id="username"/>
174:                            </div>
175:                        </div>
176:                        <div class="row text-center">


Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:465)
    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:728)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
root cause

java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'loginForm' available as request attribute
    org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:144)
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:168)
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:188)
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:154)
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:117)
    org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:422)
    org.springframework.web.servlet.tags.form.InputTag.writeTagContent(InputTag.java:142)
    org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84)
    org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80)
    org.apache.jsp.index_jsp._jspx_meth_form_005finput_005f0(index_jsp.java:717)
    org.apache.jsp.index_jsp._jspx_meth_form_005fform_005f0(index_jsp.java:653)
    org.apache.jsp.index_jsp._jspService(index_jsp.java:235)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    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:728)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

public class UserModel {
    private String username;
    private String password;
    private String email;

    //Getters
    public String getUsername(){
        return username;
    }
    public String getPassword(){
        return password;
    }
    public String getEmail(){
        return email;
    }

    //Setters
    public void setUsername(String username) {
        this.username = username;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public void setEmail(String email) {
        this.email = email;
    }
}

Jan 22, 2015 11:25:45 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre7\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\TortoiseSVN\bin;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Lenovo\Access Connections\;C:\Program Files (x86)\Lenovo\Password Manager\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\;C:\Program Files (x86)\Windows Kits\8.0\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\nodejs\;C:\Python27;C:\Program Files (x86)\QuickTime\QTSystem\;C:\Program Files\Microsoft\Web Platform Installer\;D:\Java\CodenTools\Tools\apache-maven-3.2.3\bin;C:\Program Files (x86)\Common Files\lenovo\easyplussdk\bin;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\TortoiseSVN\bin;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Lenovo\Access Connections\;C:\Program Files (x86)\Lenovo\Password Manager\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateA;.
Jan 22, 2015 11:25:45 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:web' did not find a matching property.
Jan 22, 2015 11:25:45 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Jan 22, 2015 11:25:45 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Jan 22, 2015 11:25:45 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 630 ms
Jan 22, 2015 11:25:45 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Jan 22, 2015 11:25:45 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.47
Jan 22, 2015 11:25:45 AM org.apache.catalina.util.SessionIdGenerator createSecureRandom
INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [113] milliseconds.
Jan 22, 2015 11:25:47 AM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath
Jan 22, 2015 11:25:47 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
Jan 22, 2015 11:25:47 AM org.springframework.web.context.ContextLoader initWebApplicationContext
INFO: Root WebApplicationContext: initialization started
Jan 22, 2015 11:25:47 AM org.springframework.web.context.support.XmlWebApplicationContext prepareRefresh
INFO: Refreshing Root WebApplicationContext: startup date [Thu Jan 22 11:25:47 IST 2015]; root of context hierarchy
Jan 22, 2015 11:25:47 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/spring-context.xml]
Jan 22, 2015 11:25:47 AM org.springframework.web.context.ContextLoader initWebApplicationContext
INFO: Root WebApplicationContext: initialization completed in 252 ms
Jan 22, 2015 11:25:47 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'mvc-dispatcher'
Jan 22, 2015 11:25:47 AM org.springframework.web.servlet.DispatcherServlet initServletBean
INFO: FrameworkServlet 'mvc-dispatcher': initialization started
Jan 22, 2015 11:25:47 AM org.springframework.web.context.support.XmlWebApplicationContext prepareRefresh
INFO: Refreshing WebApplicationContext for namespace 'mvc-dispatcher-servlet': startup date [Thu Jan 22 11:25:47 IST 2015]; parent: Root WebApplicationContext
Jan 22, 2015 11:25:47 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/mvc-dispatcher-servlet.xml]
Jan 22, 2015 11:25:48 AM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter initControllerAdviceCache
INFO: Looking for @ControllerAdvice: WebApplicationContext for namespace 'mvc-dispatcher-servlet': startup date [Thu Jan 22 11:25:47 IST 2015]; parent: Root WebApplicationContext
Jan 22, 2015 11:25:48 AM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter initControllerAdviceCache
INFO: Looking for @ControllerAdvice: WebApplicationContext for namespace 'mvc-dispatcher-servlet': startup date [Thu Jan 22 11:25:47 IST 2015]; parent: Root WebApplicationContext
Jan 22, 2015 11:25:48 AM org.springframework.web.servlet.DispatcherServlet initServletBean
INFO: FrameworkServlet 'mvc-dispatcher': initialization completed in 603 ms
Jan 22, 2015 11:25:48 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Jan 22, 2015 11:25:48 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Jan 22, 2015 11:25:48 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2841 ms
Jan 22, 2015 11:25:49 AM org.springframework.web.servlet.PageNotFound noHandlerFound
WARNING: No mapping found for HTTP request with URI [/web/] in DispatcherServlet with name 'mvc-dispatcher'

共有1个答案

孟子墨
2023-03-14

将index.jsp移动到WEB-INF/jsp目录，并尝试使用如下所示的URL访问应用程序。

http://[hostname]:[Port]/[appcontext]/login.htm

当您尝试使用URLhttp://[hostname]:[Port]/[appcontext]index.jsp访问应用程序时，您的欢迎文件列表似乎包含index.jsp，但这一次没有可用的模型属性。

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