Question

我是Spring MVC的新手。在尝试基本程序时，我面临404错误页面。

Web.xml中

<web-app id="WebApp_ID" version="2.4"
    xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>My Demo App</display-name>
    <servlet>
        <servlet-name>myDemoApp</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/config/myDemoApp-servletConfig.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>myDemoApp</servlet-name>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>

</web-app>

myDemoApp-servletConfid.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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        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-4.0.xsd">

    <mvc:annotation-driven/>

    <!-- Components Scanner...package name should be the one which is having the controllers -->
    <context:component-scan base-package="com.demo.controllers"></context:component-scan>

    <!-- View Resolver Interface -->
    <!-- <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean> -->

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
</beans>

控制器类

package com.demo.controllers;

import java.util.Random;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class MyDemoController {

    private String[] quotes = {"Hi I am vikram,"
            + "I am from Bangalore,"
            + "Bangalore is full of traffic"};

    @RequestMapping("/getQuote")
    public String getRandomQuote(Model model){

        int rand = new Random().nextInt(quotes.length);
        String randomQuote = quotes[rand];

        //http://localhost:8080/springMVCDemo/getQuote.html
        model.addAttribute("randomQuote",randomQuote);
        return "quote";
    }

}

JSP页面

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>My Demo App</title>
</head>
<body>
    <h1>The Quote is: </h1>
    <p>${randomQuote}</p>
</body>
</html>

使用的网址：

http://localhost/8050/springMVCDemo/getQuote.html

文件夹结构： [在此输入图像说明] [1]

请建议我解决错误。

Answer 1

从错误中可以清楚地看出弹簧未能按照当前配置加载控制器。始终关注调试日志，并查看启动时使用弹簧容器注册的bean。记录将帮助您更好地解决此问题。

尝试使用Bootstrap监听器ContextLoaderListener，该监听器将从contextConfigLocation

中设置的context-param读取并加载配置

例如：

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/config/myDemoApp-servletConfid.xml</param-value>
</context-param>

<listener>
   <listener-class>
        org.springframework.web.context.ContextLoaderListener
   </listener-class>
</listener>

按照相关的post

进行操作

Answer 2

更改 myDemoApp （调度程序）servlet映射，如下所示。

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

HTTP错误404.找不到请求的资源。 Spring MVC

2 个答案: