java 请求的资源不可用 Spring 3 MVC
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The requested resource is not available Spring 3 MVC
提问by Paulius Matulionis
I am getting the requested resource () is not available displayed in the browser and I can not understand what I am doing wrong.
我在浏览器中显示请求的资源 () 不可用，我无法理解我做错了什么。
This is my applicationContext-dispatcher.xml:
这是我的 applicationContext-dispatcher.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp"/>
</beans>
This is my web.xml:
这是我的 web.xml：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
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_3_0.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/applicationContext-main.xml
/WEB-INF/applicationContext-hibernate.xml
/WEB-INF/applicationContext-jms.xml
/WEB-INF/applicationContext-i18n.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<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/applicationContext-dispatcher.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>redirect.jsp</welcome-file>
</welcome-file-list>
</web-app>
This is the redirect.jsp:
这是redirect.jsp：
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<% response.sendRedirect("index.htm"); %>
And the index.jsp page is located under the WEB-INF/jsp.
index.jsp 页面位于 WEB-INF/jsp 下。
When open the browser I see the 404 error code generated from tomcat ant the message that resource is not available. I don't understand what is wrong. Any ideas?
打开浏览器时，我看到 404 错误代码是由 tomcat ant 生成的资源不可用的消息。我不明白出了什么问题。有任何想法吗？
回答by Priyank Doshi
Resources which are inside the WEB-INFfolder aren't accessible to the outside world (JSP file in your case). Means that you can not simply hit the URL and see the JSP file.
外部世界无法访问WEB-INF文件夹内的资源（在您的情况下为 JSP 文件）。意味着您不能简单地点击 URL 并查看 JSP 文件。
For example, you have the following JSP,
例如，您有以下 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>
</head>
<body>
<h1>Hello World</h1>
</body>
</html>
then you can not simply hit the browser using:
那么你不能简单地使用以下方法点击浏览器：
http://localhost:8080/project-name/WEb-INF/nameofpage.jsp
It will throw the same error. Though you can programmatically access those resources inside WEB-INF folder.
它会抛出同样的错误。虽然您可以以编程方式访问 WEB-INF 文件夹中的这些资源。
Write the following controller:
编写以下控制器：
package your.apckage.name;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class SampleController {
@RequestMapping(value = "/index", method = RequestMethod.GET)
public String sample() {
return "index";
}
}
And add the following line in spring -config file:
并在 spring -config 文件中添加以下行：
<context:component-scan
base-package="package name of the controller" />
回答by pap
So, have you defined any controller mapping for index.htm? Spring won't "automatically" forward the request to your index.jsp view, you need to define a controller to handle the index.htm url.
那么，您是否为 index.htm 定义了任何控制器映射？Spring 不会“自动”将请求转发到您的 index.jsp 视图，您需要定义一个控制器来处理 index.htm url。
@Controller
public class IndexController {
@RequestMapping("/index.htm")
public String handleIndexGet() {
return "index"; // forward to view index.jsp
}
}
回答by adarshr
Shouldn't it be
不应该是
<% response.sendRedirect("index.jsp"); %>
Also, since you're doing a redirect, the index.jsphas to be present outside WEB-INF to be accessible to your browser.
此外，由于您正在执行重定向，因此index.jsp必须存在于 WEB-INF 之外才能被您的浏览器访问。
回答by Priyank Doshi
Generally requested resource not founderror comes when there is a problem in URL mapping. When the requested URL does not match to any of the URL patterns, it throws this exception.
URL 映射有问题时，通常会出现请求的资源未找到错误。当请求的 URL 与任何 URL 模式不匹配时，它会抛出此异常。
