Spring框架配置

Question

自从我开始学习 Spring Framework 并尝试使用 MongoDB 和 Spring Framework 实现 RESTful Web 服务以来已经 3 天了。我还处于起步阶段并试图了解 Spring Framework 的配置。当我开始我的项目并点击所需的 URL 时，它不起作用。我也将我的项目上传到 github (here is the url)

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         id="WebApp_ID"
         version="2.4"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
                             http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" 
       xmlns:context="http://www.springframework.org/schema/context" 
       xmlns:mvc="http://www.springframework.org/schema/mvc"   
       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
                           http://www.springframework.org/schema/mvc
                           http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
    <!-- Activates various annotations to be detected in bean classes -->
    <context:annotation-config />
    <!-- Scans the classpath for annotated components that will be auto-registered as Spring beans.
     For example @Controller and @Service. Make sure to set the correct base-package-->
    <context:component-scan base-package="shoponway.webservice" />
    <!-- Configures the annotation-driven Spring MVC Controller programming model.
    Note that, with Spring 3.0, this tag works in Servlet MVC only!  -->
    <mvc:annotation-driven />
    <!-- Loads MongoDB configuraton -->
    <import resource="mongo-config.xml" />
</beans>

spring-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" 
       xmlns:p="http://www.springframework.org/schema/p" 
       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">
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
</beans>

和我的控制器

@Controller
public class PersonController {
    protected Logger logger = Logger.getLogger(PersonController.class);

    @Resource(name = "personService")
    private PersonService personService;

    @RequestMapping(value = "/allpersons", method = RequestMethod.GET)
    public String getAllPersons(Model model){
        model.addAttribute("persons", personService.getAllPersons());
        return "personspage";
    }
}

我遇到的错误

 java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:529)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:511)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:139)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4888)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

Answer 1

本例中存在多个问题，可以如下更正

1. 将 @Service 注释添加到您的 shoponway.webservice.services.PersonService 类中，您需要添加 @Service 以使其成为合适的注入候选者。

2. 您的 'mongo-config.xml' 指向错误的 mongo 存储库位置，请将其编辑为 <mongo:repositories base-package="shoponway.webservice.services" /> 来自
   <mongo:repositories base-package="org.krams.tutorial.repositories" />

3. Mongo 模板应引用以下 bean <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate"> 而不是 class="org.springframework.data.document.mongodb.MongoTemplate"

4) 用

替换 mongo-config.xml 内容

<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:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-3.0.xsd
      http://www.springframework.org/schema/data/mongo
      http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
      http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

<mongo:mongo host="localhost" port="27017" />
<mongo:db-factory dbname="shoponwaydb" />

<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
</bean>

 </beans>

`

一旦你改正了这些，你就可以轻松地运行你的例子了：