springmvc No mapping found for HTTP request with URI in Dispatc

项目是使用spring MVC

(1)在浏览器中访问,后台总报错:

  1. No mapping found for HTTP request with URI [/exam3/welcome] in DispatcherServlet with name 'spring2'

查了好半天,才发现是controller 没有扫描到

我是使用的注解。

spring mvc配置文件如下:

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
  4. xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
  5. xmlns:mvc="http://www.springframework.org/schema/mvc"
  6. xsi:schemaLocation="http://www.springframework.org/schema/beans
  7. http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
  8. http://www.springframework.org/schema/context
  9. http://www.springframework.org/schema/context/spring-context-3.2.xsd
  10. http://www.springframework.org/schema/aop
  11. http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
  12. http://www.springframework.org/schema/tx
  13. http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
  14. http://www.springframework.org/schema/mvc
  15. http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"
  16. >
  17. <!-- HandlerMapping -->
  18. <bean
  19. class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />
  20. <!-- HandlerAdapter -->
  21. <bean
  22. class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />
  23. <!-- ViewResolver -->
  24. <bean
  25. class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  26. <property name="viewClass"
  27. value="org.springframework.web.servlet.view.JstlView" />
  28. <property name="prefix" value="/WEB-INF/jsp/" />
  29. <property name="suffix" value=".jsp" />
  30. </bean>
  31. <mvc:annotation-driven />
  32. <!-- 处理器 -->
  33. <!-- <bean name="/hello" class="com.mvc.jn.controller.HelloWorldController"/> -->
  34. <context:component-scan base-package="com"/>
  35. </beans>

controller 的目录结构如下:

springmvc No mapping found for HTTP request with URI in Dispatc

(2)这个问题解决之后,又报错:

No mapping found for HTTP request with URI [/exam3/WEB-INF/jsp/welcome.jsp] in DispatcherServlet with name 'spring2'

结果发现是web.xml配置得有问题,下面是有问题的:

  1. <servlet>
  2. <servlet-name>spring2</servlet-name>
  3. <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  4. <load-on-startup>1</load-on-startup>
  5. </servlet>
  6. <servlet-mapping>
  7. <servlet-name>spring2</servlet-name>
  8. <url-pattern>/*</url-pattern>
  9. </servlet-mapping>

解决方法:把url-pattern 由/* 改为/

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