我在网上查看了几乎所有与此问题相关的答案,但无法在我的代码中找出问题所在.
这是我的 JSP 页面.
<form:form method="POST" commandName="category" modelAttribute="category" action="search_category"> <form:input path="category_name" /> <input type="submit" value="Submit"> </form:form>
当我删除时
<form:input path="category_name" />
它工作正常.我可以与我的控制器通信.所以问题与这条线有关.
@Controller public class SearchCategory { @Autowired private CategoryService categoryService; @RequestMapping(value = "/search_category",method = RequestMethod.POST) public @ResponseBody String searchCategoryFromDatabase(@ModelAttribute("category") Category category,BindingResult result){ return "something"; } }
这是我的 web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <!-- Processes application requests --> <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/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> <!-- The definition of the Root Spring Container shared by all Servlets and Filters --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml</param-value> </context-param> <filter> <filter-name>hibernateFilter</filter-name> <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name>hibernateFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> </web-app>
这是我的 servlet-context.xml
<!-- Set the default page as index.jsp --> <mvc:view-controller path="/" view-name="index"/> <!-- Map resources --> <mvc:resources mapping="/resources/**" location="/,classpath:/Meta-INF/web-resources/" /> <!-- Map simple view name such as "test" into /WEB-INF/views/test.jsp --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/" /> <property name="suffix" value=".jsp" /> </bean>
还有我的 applicationContext.xml
<!-- Enable @Controller annotation support --> <mvc:annotation-driven /> <context:annotation-config/> <!-- Set the default page as index.jsp --> <mvc:view-controller path="/" view-name="index"/> <!-- Map resources --> <mvc:resources mapping="/resources/**" location="/,classpath:/Meta-INF/web-resources/" /> <!-- Map simple view name such as "test" into /WEB-INF/views/test.jsp --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/" /> <property name="suffix" value=".jsp" /> </bean> <!-- Scan classpath for annotations (eg: @Service,@Repository etc) --> <context:component-scan base-package="com.XXXX"/> <!-- JDBC Data Source. It is assumed you have MySQL running on localhost port 3306 with username root and blank password. Change below if it's not the case --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassname" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/XXXX"/> <property name="username" value="XXXX"/> <property name="password" value="XXXX"/> <property name="validationQuery" value="SELECT 1"/> </bean> <!-- Hibernate Session Factory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="configLocation"> <value>classpath:hibernate.cfg.xml</value> </property> <property name="packagesToScan"> <array> <value>com.XXXX</value> </array> </property> <property name="hibernateProperties"> <value> hibernate.dialect=org.hibernate.dialect.MySQLDialect </value> </property> </bean> <!-- Hibernate Transaction Manager --> <bean id="transactionmanager" class="org.springframework.orm.hibernate4.HibernateTransactionmanager"> <property name="sessionFactory" ref="sessionFactory"/> </bean> <!-- activates annotation based transaction management --> <tx:annotation-driven transaction-manager="transactionmanager"/>
我可能在我的 XML 文件中做错了什么.我是这个春天的新手——Hibernate 的工作人员,所以等待你的帮助.谢谢..
这是抛出的异常
Stacktrace:] with root cause java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'category' 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:168) at org.springframework.web.servlet.tags.form.AbstractdataboundFormElementTag.getPropertyPath(AbstractdataboundFormElementTag.java:188) at org.springframework.web.servlet.tags.form.AbstractdataboundFormElementTag.getName(AbstractdataboundFormElementTag.java:154) at org.springframework.web.servlet.tags.form.AbstractdataboundFormElementTag.autogenerateId(AbstractdataboundFormElementTag.java:141) at org.springframework.web.servlet.tags.form.AbstractdataboundFormElementTag.resolveId(AbstractdataboundFormElementTag.java:132) at org.springframework.web.servlet.tags.form.AbstractdataboundFormElementTag.writeDefaultAttributes(AbstractdataboundFormElementTag.java:116) at org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:422) at org.springframework.web.servlet.tags.form.InputTag.writetagContent(InputTag.java:142) 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.index_jsp._jspx_meth_form_005finput_005f0(index_jsp.java:208) at org.apache.jsp.index_jsp._jspx_meth_form_005fform_005f0(index_jsp.java:168) at org.apache.jsp.index_jsp._jspService(index_jsp.java:100) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 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:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:149) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 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:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.accessLogValve.invoke(accessLogValve.java:953) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722)