Question

我正在使用Request Mapping注释编写spring应用程序。 http://localhost:8080/SpringMVC/hello给出404（请求的资源不可用）。从服务器记录数据`在DispatcherServlet中找不到带有URI [/SpringMVC/WEB-INF/jsp/helloView.jsp]的HTTP请求的映射，名称为“dispatcher” ”。有人可以帮忙。

项目结构 enter image description here

@Controller 
    @RequestMapping(value="/hello")
    public class HelloController 
    {
    @RequestMapping(method=RequestMethod.GET) 
    public ModelAndView sayHello() 
    {
    ModelAndView view=new ModelAndView("helloView","HelloMessage", "Welcome"); 
    return view; 
    }

    }

helloView.jsp

<html>
<head>
<title>Spring  Application</title>
</head>
<body>
   <h2>${HelloMessage}</h2>
</body>
</html>

的web.xml

<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">

<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/*</url-pattern>  
</servlet-mapping>

</web-app>

调度-servlet.xml中

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<!-- Scans the classpath of this application for @Components to deploy as beans -->

    <context:component-scan base-package="controller" />
    <mvc:annotation-driven />

    <bean id="jspViewResolver"
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="viewClass"
                    value="org.springframework.web.servlet.view.JstlView" />
            <property name="prefix" value="/WEB-INF/jsp/" />
            <property name="suffix" value=".jsp" />
    </bean>

</beans>

Answer 1

您忘记在dispatcher-servlet.xml中添加<context:annotation-config/>，它会激活各种注释：@Controller，@Component，@Service，@Repository。

并通过映射到/将spring调度程序设置为默认Servlet ，这样每个请求都将在调度程序servlet中结束。

<servlet>
   <servlet-name>dispatcher</servlet-name>
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
</servlet>
<servlet-mapping>
   <servlet-name>dispatcher</servlet-name>
   <url-pattern>/</url-pattern>  
</servlet-mapping>

Answer 2

你的web.xml包含调度程序servlet，其中url模式/*实际上映射了所有内容！所以，让它/并尝试...

Spring中的RequestMapping中的HTTP状态404

2 个答案: