Spring MVC 控制器映射不起作用 [英] Spring MVC Controller mapping does not work
本文介绍了Spring MVC 控制器映射不起作用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在做一个 spring-mvc 项目.经过多次尝试，我无法在春季映射控制器.结果，下面的 url 总是返回 404 not found.
I am working on a spring-mvc project. After many tries, I am unable to the map the controller in spring. As a result, the below url always returns as 404 not found.
http://localhost:8080/EcommerceBookStore/rest/welcome
这里是 web.xml
Here is the 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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>EcommerceBookStore</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/applicationContext.xml,
/WEB-INF/Ecommerce-servlet.xml
</param-value>
</context-param>
<servlet>
<servlet-name>Ecommerce</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Ecommerce</servlet-name>
<url-pattern>/rest/</url-pattern>
</servlet-mapping>
<!-- <servlet>
<servlet-name>Ecommerce</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.java.Client</param-name>
<param-value>com.java.Client</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>-->
</web-app>这里是 Ecommerce-servlet.xml
Here is the Ecommerce-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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
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 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<mvc:default-servlet-handler/>
<mvc:annotation-driven>
<mvc:argument-resolvers>
<bean class="org.springframework.security.web.bind.support.AuthenticationPrincipalArgumentResolver" />
</mvc:argument-resolvers>
</mvc:annotation-driven>
<!-- bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WebContent" />
<property name="suffix" value=".jsp" />
</bean-->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<mvc:annotation-driven />
<context:component-scan base-package="com.webspider"/>
<mvc:resources mapping="/Resources/**" location="/Resources/" />
</beans>这里是
<?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:security="http://www.springframework.org/schema/security"
xmlns:webflow-config="http://www.springframework.org/schema/webflow-config"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd http://www.springframework.org/schema/webflow-config http://www.springframework.org/schema/webflow-config/spring-webflow-config.xsd">
<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource"
id="dataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/Ecommerce"></property>
<property name="username" value="root"></property>
<property name="password" value="pass"></property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" >
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties" >
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.webspider</value>
</list>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="10240000" />
</bean>
<security:http auto-config="true">
<security:intercept-url pattern="/admin/**" access="ROLE_ADMIN" />
<security:intercept-url pattern="/customer/**" access="ROLE_USER" />
<security:form-login
login-page="/login"
default-target-url="/product/productList"
authentication-failure-url="/login?error"
username-parameter="username"
password-parameter="password" />
<security:logout
logout-success-url="/login?logout" />
</security:http>
<security:authentication-manager>
<security:authentication-provider>
<security:jdbc-user-service
data-source-ref="dataSource"
authorities-by-username-query="SELECT username, authority FROM authorities WHERE username = ?"
users-by-username-query="SELECT username, password, enabled FROM users WHERE username = ?" />
</security:authentication-provider>
</security:authentication-manager>
<webflow-config:flow-executor id="flowExecutor" flow-registry="flowRegistry" />
<webflow-config:flow-registry id="flowRegistry" base-path="/WEB-INF/flows">
<webflow-config:flow-location path="/checkout/checkout-flow.xml" id="checkout" />
</webflow-config:flow-registry>
<bean id="flowHandlerMapping" class="org.springframework.webflow.mvc.servlet.FlowHandlerMapping">
<property name="flowRegistry" ref="flowRegistry" />
</bean>
<bean id="flowHandlerAdapter" class="org.springframework.webflow.mvc.servlet.FlowHandlerAdapter">
<property name="flowExecutor" ref="flowExecutor" />
</bean>
</beans>这里是helloworld控制器
Here is the helloworld controller
package com.webspider.Controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
/*
* author: Crunchify.com
*
*/
@Controller
public class HelloWorld {
@RequestMapping("/welcome")
public ModelAndView helloWorld() {
String message = "<br><div style='text-align:center;'>"
+ "<h3>********** Hello World, Spring MVC Tutorial</h3>This message is coming from CrunchifyHelloWorld.java **********</div><br><br>";
return new ModelAndView("welcome", "message", message);
}
}
这里是tomcat的输出
Here is the tomcat output
Nov 23, 2016 12:41:14 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dfile.encoding=UTF-8
Nov 23, 2016 12:41:14 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /Users/atishpatra/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
Nov 23, 2016 12:41:15 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-nio-8080"]
Nov 23, 2016 12:41:15 AM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
Nov 23, 2016 12:41:15 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-nio-8009"]
Nov 23, 2016 12:41:15 AM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
Nov 23, 2016 12:41:15 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 972 ms
Nov 23, 2016 12:41:15 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Nov 23, 2016 12:41:15 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/8.0.38
Nov 23, 2016 12:41:18 AM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Nov 23, 2016 12:41:18 AM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath
Nov 23, 2016 12:41:18 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'Ecommerce'
Nov 23, 2016 12:41:18 AM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'Ecommerce': initialization started
Nov 23, 2016 12:41:18 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing WebApplicationContext for namespace 'Ecommerce-servlet': startup date [Wed Nov 23 00:41:18 CST 2016]; root of context hierarchy
Nov 23, 2016 12:41:18 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/Ecommerce-servlet.xml]
Nov 23, 2016 12:41:19 AM org.springframework.beans.factory.support.DefaultListableBeanFactory registerBeanDefinition
INFO: Overriding bean definition for bean 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping' with a different definition: replacing [Root bean: class [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] with [Root bean: class [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null]
Nov 23, 2016 12:41:19 AM org.springframework.beans.factory.support.DefaultListableBeanFactory registerBeanDefinition
INFO: Overriding bean definition for bean 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter' with a different definition: replacing [Root bean: class [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] with [Root bean: class [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null]
Nov 23, 2016 12:41:19 AM org.springframework.beans.factory.support.DefaultListableBeanFactory registerBeanDefinition
INFO: Overriding bean definition for bean 'mvcUriComponentsContributor' with a different definition: replacing [Root bean: class [org.springframework.web.servlet.config.AnnotationDrivenBeanDefinitionParser$CompositeUriComponentsContributorFactoryBean]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] with [Root bean: class [org.springframework.web.servlet.config.AnnotationDrivenBeanDefinitionParser$CompositeUriComponentsContributorFactoryBean]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null]
Nov 23, 2016 12:41:19 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/**] onto handler 'org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler#0'
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Nov 23, 2016 12:41:20 AM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter initControllerAdviceCache
INFO: Looking for @ControllerAdvice: WebApplicationContext for namespace 'Ecommerce-servlet': startup date [Wed Nov 23 00:41:18 CST 2016]; root of context hierarchy
Nov 23, 2016 12:41:20 AM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter initControllerAdviceCache
INFO: Looking for @ControllerAdvice: WebApplicationContext for namespace 'Ecommerce-servlet': startup date [Wed Nov 23 00:41:18 CST 2016]; root of context hierarchy
Nov 23, 2016 12:41:20 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/Resources/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0'
Nov 23, 2016 12:41:20 AM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'Ecommerce': initialization completed in 2089 ms
Nov 23, 2016 12:41:21 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-nio-8080"]
Nov 23, 2016 12:41:21 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-nio-8009"]
Nov 23, 2016 12:41:21 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 5855 ms我在 tomcat 输出中没有看到任何错误.我期待类似的东西出现
I dont see any error in tomcat output. I expected something similar to appear
信息:将 URL 路径 [/welcome] 映射到处理程序 HelloWorld.
INFO: Mapped URL path [/welcome] onto handler HelloWorld.
我不知道出了什么问题.谁能指出我遗漏了什么?
I have no clue what's wrong. Can anyone please point out what I am missing ?
提前致谢.
推荐答案
尝试以下，
@RequestMapping("/welcome", method = RequestMethod.GET)
public ModelAndView helloWorld() {...
确保您的映射是，
<servlet-mapping>
<servlet-name>Ecommerce</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
将您的默认 servlet 名称自定义为，
Customize your default servlet name as,
<mvc:default-servlet-handler default-servlet-name="Ecommerce"/>
试用网址:localhost:8080/Ecommerce/welcome
URL to try : localhost:8080/Ecommerce/welcome
这篇关于Spring MVC 控制器映射不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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