无法运行"Hello World" Spring MVC代码 [英] Can't run 'Hello World" Spring MVC code
问题描述
我从Spring的网站上举了以下示例，试图理解基本概念，但到目前为止，我一直在努力地进行配置.
I took the following example from Spring's website, trying to understand the basic concepts but so far I've only been struggling with configuration.
这是web.xml:
<?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">
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
servlet-context.xml
servlet-context.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"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
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">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Scans within the base package of the application for @Components to configure as beans -->
<!-- @Controller, @Service, @Configuration, etc. -->
<context:component-scan base-package="xyz.sample.baremvc" />
<!-- Enables the Spring MVC @Controller programming model -->
<mvc:annotation-driven />
</beans>
然后是HomeController.java
Then HomeController.java
package xyz.sample.baremvc;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* Handles requests for the application home page.
*/
@Controller
public class HomeController {
@RequestMapping(value = "/")
public String home() {
System.out.println("HomeController: Passing through...");
return "WEB-INF/views/home.jsp";
}
}
最后是home.jsp
And finally home.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page session="false" %>
<!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>
<p>Hello World!
</body>
</html>
为完整起见，这是文件夹结构
For completeness this is the folder structure
因此，我运行此项目，并收到以下消息:
So I run this project and I get the following message:
Nov 29, 2013 11:14:33 PM org.springframework.web.servlet.DispatcherServlet noHandlerFound
WARNING: No mapping found for HTTP request with URI [/Springer2/] in DispatcherServlet with name 'appServlet'
我尝试使用路径名之类的东西，但是似乎没有任何作用.我无法理解为什么直接从马口中拿走这样简单的代码后，在运行如此简单的代码时会遇到很多麻烦.
I tried to play around with path names and whatnot but nothing seems to work. I can't fathom why I'm having so much trouble running such simple code after taking it directly from the horse's mouth.
推荐答案
由于您将所有类放在资源目录中，因此它们不会被编译.将所有软件包移到 src/main/java .
Since you placed all your classes inside the resources directory they won't get compiled. Move all packages to src/main/java.
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