我正在关注此Spring Docs并配置web.xml
和applicatioinContext.xml
以使用功能 Spring Web MVC中的单根上下文 即没有Servlet WebApplicationContext;所有请求都将由Root WebApplicatioinContext提供。
但问题是HTTP请求未被委托给根WebApplicationContext的控制器。
的web.xml:
<web-app>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/root-context.xml</param-value>
</context-param>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value></param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
根context.xml中:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="PostController" class="org.my.controllers.PostController">
</bean>
</beans>
控制器:
@Controller
public class PostController {
@RequestMapping(value= "/controller", method = RequestMethod.GET)
@ResponseBody
public String foo() {
return "Response!";
}
}
因此,当我在浏览器中点击网址http://localhost:8080/PracticeJavaWeb/controller时,它显示404
服务器日志说:
警告:找不到带URI的HTTP请求的映射 [/ PracticeJavaWeb / controller]在DispatcherServlet中的名称 &#39;调度&#39;
也可以只有一个根上下文用于单个 DispatcherServlet场景。
答案 0 :(得分:3)
对root-context.xml文件只做一个小改动,添加:
<mvc:annotation-driven></mvc:annotation-driven>
mvc:annotation-driven
使上下文路径能够识别spring mvc注释,以便将请求分派给控制器。
这里还有一个root-context.xml的完整示例
<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.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-4.3.xsd">
<mvc:annotation-driven></mvc:annotation-driven>
<bean id="welcomeService" class="com.myorg.controller.MyService"></bean>
<bean id="welcomControler" class="com.myorg.controller.WelcomeController"></bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
答案 1 :(得分:1)
您需要在root-context.xml中添加<mvc:annotation-driven />
标记。
<mvc:annotation-driven />
标记可确保将您的请求分派给控制器。
并且不要忘记在root-context.xml中添加mvc名称空间
<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"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>