java - 试用 Spring 3 MVC，出现页面错误

Question

尝试配置 spring 3 MVC，这是我目前所做的:

我将所有 spring 3.0 库添加到我的 netbeans 项目中。

我的 web.xml 是:

<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
    <servlet>
        <servlet-name>WebApplication1</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>WebApplication1</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>    
</web-app>

接下来我创建了一个 WebAppliation1-servlet.xml，也在我的/web-inf 文件夹中:

<?xml version="1.0" encoding="UTF-8"?>
<!--
 - DispatcherServlet application context for PetClinic's web tier.
-->
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
  xmlns:oxm="http://www.springframework.org/schema/oxm"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.0.xsd">

 <!--
  - The controllers are autodetected POJOs labeled with the @Controller annotation.
 -->
 <context:component-scan base-package="org.springframework.Hi"/>

 <!--
  - The form-based controllers within this application provide @RequestMapping
  - annotations at the type level for path mapping URLs and @RequestMapping
  - at the method level for request type mappings (e.g., GET and POST).
  - In contrast, ClinicController - which is not form-based - provides
  - @RequestMapping only at the method level for path mapping URLs.
  -
  - DefaultAnnotationHandlerMapping is driven by these annotations and is
  - enabled by default with Java 5+.
 -->



 <!--
  - This bean resolves specific types of exceptions to corresponding logical
  - view names for error views. The default behaviour of DispatcherServlet
  - is to propagate all exceptions to the servlet container: this will happen
  - here with all other types of exceptions.
 -->
 <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
  <property name="exceptionMappings">
   <props>
    <prop key="org.springframework.web.servlet.PageNotFound">pageNotFound</prop>
    <prop key="org.springframework.dao.DataAccessException">dataAccessFailure</prop>
    <prop key="org.springframework.transaction.TransactionException">dataAccessFailure</prop>
   </props>
  </property>
 </bean>


 <!--
  - The BeanNameViewResolver is used to pick up the visits view name (below).
  - It has the order property set to 2, which means that this will
  - be the first view resolver to be used after the delegating content
  - negotiating view resolver.
  -->
 <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" p:order="1"/>
 <!--

  - This bean configures the 'prefix' and 'suffix' properties of
  - InternalResourceViewResolver, which resolves logical view names
  - returned by Controllers. For example, a logical view name of "vets"
  - will be mapped to "/WEB-INF/jsp/vets.jsp".
 -->
 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/"
   p:suffix=".jsp" p:order="2"/>



</beans>

然后我在文件夹/WEB-INF/jsp/welcome.jsp 中创建了一个简单的 welcome.jsp

然后我创建了一个包:

org.springframework.Hi

然后我创建了一个 TestController.java 文件:

包 org.springframework.Hi;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;


@Controller
public class TestController {


    @RequestMapping("/")
    public String welcomeHandler(){
        return "welcome";
    }

}

我希望它可以在没有任何文件扩展名的情况下工作，所以我不必以 xxx.htm 等结尾我的 url。

所以当我运行 netbeans 项目时，我得到了错误:

type Status report

message Servlet WebApplication1 is not available

description The requested resource (Servlet WebApplication1 is not

available) is not available.

我到底错过了什么？

Tomcat 日志

感谢反馈

我的 tomcat 日志显示:

SEVERE: Servlet /WebApplication1 threw load() exception
java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:316)
        at org.springframework.web.servlet.DispatcherServlet.<clinit>(DispatcherServlet.java:207)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)

Answer 1

我假设您引用的错误消息是浏览器在尝试访问应用程序时看到的错误消息。这是因为它没有正确部署。

您需要查看 Web 服务器启动日志，这将为您提供有关未部署原因的更多信息。

编辑: 好的，这很有帮助...您需要添加 Apache Commons Logging到你的类路径。