java - Spring MVC Controller 未加载

Question

我遇到 Spring 未拾取 Controller 的问题。我已经使用 maven webapp archetype 在 Eclipse 中创建了一个项目，它运行良好 - 我可以访问 index.jsp 页面。当我将 Spring 添加到项目中时，问题就开始了。 (上下文、 Controller 等)

我正在使用 Eclipse Mars、Tomcat 8、maven 3.3.3 和 Spring 4.2.2

这是我在日志中看到的内容(可能只有第三行重要):

Looking for matching resources in directory tree [C:\Users\dima\spring_workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\wtpwebapps\cte\WEB-INF\classes\com\company\dept\demo\cte\controller]
Searching directory [C:\Users\dima\spring_workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\wtpwebapps\cte\WEB-INF\classes\com\company\dept\demo\cte\controller] for files matching pattern [C:/Users/dima/spring_workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/cte/WEB-INF/classes/com/company/dept/demo/cte/controller/**/*.class]
Resolved location pattern [classpath*:com/company/dept/demo/cte/controller/**/*.class] to resources []

而不是像

INFO: Mapped URL path ...

因此，我在尝试打开网页时收到 404 错误。这些是文件:

调度程序-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mvc="http://www.springframework.org/schema/mvc" 
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ldap="http://www.springframework.org/schema/ldap"
    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/ldap 
        http://www.springframework.org/schema/ldap/spring-ldap.xsd">

    <context:component-scan base-package="com.company.dept.demo.cte.controller" />

    <mvc:annotation-driven/>

    <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>
</beans>

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>

    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

这是我的 Controller :

package com.company.dept.demo.cte.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/pid")
public class PidController {

    @RequestMapping(value="/hello")
    public ModelAndView helloWorld() {
        ModelAndView mav = new ModelAndView("pidHello");
        mav.addObject("message", "hello world");
        return mav;
    }
}

尝试访问 localhost:8080/cte/pid/hello 时返回 404，日志显示:

DispatcherServlet with name 'dispatcher' processing GET request for [/cte/pid/hello]
Looking up handler method for path /pid/hello
Did not find handler method for [/pid/hello]
No mapping found for HTTP request with URI [/cte/pid/hello] in DispatcherServlet with name 'dispatcher'

谢谢。

更新:WAR 文件是正确的，但由于某种原因，当它部署到 Tomcat Controller 类时没有被复制。

Answer 1

这是您完整的 web.xml 吗？因为您必须将调度程序 servlet 引用添加到 web.xml 中，如下所示 -

    <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>