我在这个项目中使用 Spring 4 Web MVC。请帮我看看我的配置和我在下面得到的错误。如果我的配置方式错误，请纠正我。谢谢你。
根上下文.xml
<bean id="entityManagerFac" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" autowire="byName">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan">
<list>
<value>com.hannacch.admin.model</value>
</list>
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">validate</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.SQLServer2012Dialect</prop>
</props>
</property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=DBADMIN;" />
<property name="username" value="sa" />
<property name="password" value="@dmin" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFac" />
</bean>
<tx:annotation-driven />
<bean id="persistenceExceptionTranslationPostProcessor" class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
<jpa:repositories base-package="com.hannacch.admin.repository" entity-manager-factory-ref="entityManagerFac"/>
servlet-context.xml
<annotation-driven />
<context:annotation-config></context:annotation-config>
<context:component-scan base-package="com.hannacch.controller" />
<resources mapping="/resources/**" location="/resources/" />
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="viewClass" value="com.hannacch.Spring.JstlView" />
<beans:property name="prefix" value="/WEB-INF/views/page/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
管理员上下文.xml
<annotation-driven />
<context:annotation-config></context:annotation-config>
<context:component-scan base-package="com.hannacch.admin" />
<resources mapping="/resources/**" location="/resources/" />
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="viewClass" value="com.hannacch.Spring.AdminJstlView" />
<beans:property name="prefix" value="/WEB-INF/views/admin/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
创建用户控制器.java
@ModelAttribute("userCredential")
public UserCredential createModel() {
return new UserCredential();
}
@RequestMapping(method = RequestMethod.GET)
public String createUser() {
return "/admin/createUser";
}
@RequestMapping(value="/addUser", method = RequestMethod.POST)
public String doActions(@ModelAttribute UserCredential userCredential) {
userCredential.setId(1);
userCredentialService.createUserCredential(userCredential);
return "/admin/createUser";
}
创建用户.jsp
<form:form action="createUser/addUser" method="POST" commandName="userCredential">
<table>
<tr>
<td><form:label path="username">Username</form:label></td>
<td><form:input path="username" /></td>
</tr>
<tr>
<td><form:label path="password">Password</form:label></td>
<td><form:password path="password" /></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="Submit"/>
</td>
</tr>
web.xml
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>adminServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/admin-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>adminServlet</servlet-name>
<url-pattern>/admin/*</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
以前在我的 servlet-context.xml 和 admin-context.xml 中，我没有在这两个 xml 中设置 viewClass，模型属性正在工作并且能够让我将数据保存到数据库中。在 servlet-context.xml 和 admin-context.xml 中添加 viewClass 后，代码不起作用，出现以下错误：
ERROR: org.springframework.web.servlet.tags.form.LabelTag - Neither BindingResult nor plain target object for bean name 'userCredential' available as request attribute
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'userCredential' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:144)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:168)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:188)
at org.springframework.web.servlet.tags.form.LabelTag.autogenerateFor(LabelTag.java:130)
at org.springframework.web.servlet.tags.form.LabelTag.resolveFor(LabelTag.java:120)
at org.springframework.web.servlet.tags.form.LabelTag.writeTagContent(LabelTag.java:90)
at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84)
at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80)
at org.apache.jsp.WEB_002dINF.views.admin.createUser_jsp._jspx_meth_form_005flabel_005f0(createUser_jsp.java:224)
at org.apache.jsp.WEB_002dINF.views.admin.createUser_jsp._jspx_meth_form_005fform_005f0(createUser_jsp.java:169)
at org.apache.jsp.WEB_002dINF.views.admin.createUser_jsp._jspService(createUser_jsp.java:121)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:721)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:584)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:523)
at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:934)
at org.apache.jsp.WEB_002dINF.views.include.adminTemplate_jsp._jspService(adminTemplate_jsp.java:102)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:721)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:584)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:523)
at com.hannacch.Spring.AdminJstlView.renderMergedOutputModel(AdminJstlView.java:19)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:277)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
我怎么解决这个问题？我的 JSTLView 会发生什么？
AdminJSTLView.java
public class AdminJstlView extends InternalResourceView {
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception {
String dispatcherPath = prepareForRendering(request, response);
request.setAttribute("adminContents", dispatcherPath.substring(dispatcherPath.lastIndexOf("/") + 1));
RequestDispatcher requestDispatcher = request.getRequestDispatcher("/WEB-INF/views/include/adminTemplate.jsp");
requestDispatcher.include(request, response);
}
}