Spring MVC应用程序中的404错误
[英]404 error in Spring MVC application
问题描述
I have created a simple spring MVC application without using any build tools like maven or ant in eclipse EE IDE 
我创建了一个简单的spring MVC应用程序，而未在Eclipse EE IDE中使用任何构建工具（如maven或ant）
The application consist of only one controller class, 2 XML's ( web.xml and spring-servlet.xml ) and a jsp page( hellopage.jsp ) 该应用程序仅包含一个控制器类，2个XML类（ web.xml和spring-servlet.xml ）和一个jsp页面（ hellopage.jsp ）。
I am using tomcat and 6.0 eclipse galileo. 我正在使用tomcat和6.0 eclipse galileo。
In my spring-servlet.xml file I have mentioned <servlet-name> as "Spring" and <servlet-class> as org.springframework.web.servlet.DispatcherServlet , <url-pattern> as *.html , whereas in my web.xml file welcome file is index.jsp which has a link( <a href="hello.html">click</a> ) to hello.html . 在我的spring-servlet.xml文件中，我曾提到<servlet-name>为“ Spring”和<servlet-class>为org.springframework.web.servlet.DispatcherServlet ， <url-pattern>为*.html ，而在我的web.xml文件欢迎文件是index.jsp ，该文件具有指向hello.html的链接（ <a href="hello.html">click</a> ）。
My controller class has request mapping as ( "/hello" ), when in the browser after deploying the war file of my application I hit the URL localhost:8080/projectname the index.jsp page pops up with a link "click" , but after clicking on this link I get a 404 error mentioning " servlet spring is not available " means the dispatcher servlet which I mentioned in spring-servlet.xml file, please can anyone help? 我的控制器类的请求映射为（ "/hello" ），当在浏览器中部署了我的应用程序的war文件后，我点击URL localhost:8080/projectname ， index.jsp页面以链接"click"弹出，但是单击此链接后，我收到一个404错误，提示“ servlet弹簧不可用 ”，这意味着我在spring-servlet.xml文件中提到的调度程序servlet，任何人都可以帮忙吗？
Here is the code: 这是代码：
web.xml: web.xml中：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>SpringMVC</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<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>*.html</url-pattern>
</servlet-mapping>
</web-app>
HelloWorldController.java: HelloWorldController.java：
package com.samar.controllers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class HelloWorldController {
@RequestMapping("/hello")
public ModelAndView helloworld()
{
String message ="Hello spring MVC...!!";
return new ModelAndView("hellopage","message",message);
}
}
spring-servlet.xml: 为spring-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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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">
<context:component-scan base-package="com.samar.controllers"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
index.jsp: 的index.jsp：
<%@ 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>Insert title here</title>
</head>
<body>
<a href="/hello.html">Click</a>
</body>
</html>
hellopage.jsp: hellopage.jsp：
<%@ 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>Insert title here</title>
</head>
<body>
Message is ${message}
</body>
</html>
3 个解决方案
解决方案1
1 2015-04-29 22:43:32
You have to tell Spring to read your @Controller and other annotations. 您必须告诉Spring读取您的@Controller和其他注释。
This can be done by adding 这可以通过添加
<context:annotation-config/>
to your spring-servlet.xml 到您的spring-servlet.xml
解决方案2
0 2015-04-29 21:46:52
"servlet spring not available" means your app didn't start up correctly. “ Servlet弹簧不可用”表示您的应用未正确启动。
Check your tomcat log for details. 检查您的tomcat日志以获取详细信息。
This may have info you need: http://forum.spring.io/forum/spring-projects/web/41340-beginner-s-problem-servlet-is-not-available 这可能包含您需要的信息： http : //forum.spring.io/forum/spring-projects/web/41340-beginner-s-problem-servlet-is-not-available
解决方案3
0 2015-05-01 17:31:15
谢谢大家，终于解决了实际问题，除了在项目的构建路径中添加“ spring core”和“ spring web”罐子之外，我还必须将它们添加到WEB-INF下的lib文件夹中，并且现在可以使用了，这就是为什么Tomcat无法找到调度程序servlet从而导致404错误的原因。我希望答案能帮助像我这样的初学者。
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