SSM整合踩坑集合

逃离我推掉我的手 2022-05-23 07:06 190阅读 0赞

IDE：IntelliJ IDEA  
maven项目管理，Spring，Spring MVC，MyBatis整合开发  
纯xml配置  
![这里写图片描述][70]  
上图是Spring容器和SpringMVC的配置的文件，下图是自定义的Controller  
![这里写图片描述][70 1]  
然后运行就出现了如下的错误，哭唧唧  
![这里写图片描述][70 2]  
启动时出现这个页面，后台报错如下：

Caused by: java.io.FileNotFoundException: Could not open ServletContext resource 
    [/applicationContext.xml]
        at org.springframework.web.context.support.ServletContextResource.getInputStream(ServletContextResource.java:141)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:330)
        ... 40 more

令人头大的错误，明明web.xml文件中的配置是这样的

<context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:config/applicationContext.xml</param-value>
      </context-param>
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
       <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:config/spring-mvc.xml</param-value>
        </init-param>
      </servlet>
      <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>

spring-mvc.xml文件中的配置：

<mvc:annotation-driven/>
        <context:component-scan base-package="com.dream.*"/>
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="WEB-INF/view"/>
            <property name="suffix" value=".jsp"/>
        </bean>
        <tx:annotation-driven/>

其中base-package是扫描的包，所以应该写成如下！！！

<context:component-scan base-package="com.dream.controller"/>

我也不知道是为啥？？？莫名其妙，委屈巴巴。如果有大佬知道原因，求指导！

## No mapping found for HTTP request with URI \[/my/index\] in DispatcherServlet with name ‘dispatcherServlet’ ##

DEBUG 2018-06-04 16:22:12,755 org.springframework.web.servlet.DispatcherServlet: DispatcherServlet with name 'dispatcherServlet' processing GET request for [/my/index]
      DEBUG 2018-06-04 16:22:12,755 org.springframework.web.servlet.handler.AbstractHandlerMethodMapping: Looking up handler method for path /my/index DEBUG 2018-06-04 16:22:12,756 org.springframework.web.servlet.handler.AbstractHandlerMethodMapping: Did not find handler method for [/my/index] WARN 2018-06-04 16:22:12,756 org.springframework.web.servlet.DispatcherServlet: No mapping found for HTTP request with URI [/my/index] in DispatcherServlet with name 'dispatcherServlet'
      DEBUG 2018-06-04 16:22:12,756 org.springframework.web.servlet.FrameworkServlet: Successfully completed request

出现上述错误说明是Spring MVC配置错误，果不其然，就是上述的Controller包没有配置正确，所以出现的这个问题。  
修正之后，后台输出日志消息：

DEBUG 2018-06-04 19:56:34,514 org.springframework.web.servlet.DispatcherServlet: Rendering view [org.springframework.web.servlet.view.InternalResourceView: name 'index'; URL [WEB-INF/view/index.jsp]] in DispatcherServlet with name 'dispatcherServlet'
      DEBUG 2018-06-04 19:56:34,514 org.springframework.web.servlet.view.InternalResourceView: Forwarding to resource [WEB-INF/view/index.jsp] in InternalResourceView 'index'
      DEBUG 2018-06-04 19:56:34,515 org.springframework.web.servlet.FrameworkServlet: Successfully completed request

说明路径解析访问正常，但是前端界面显示如下：  
![这里写图片描述][70 3]  
访问路径：[http://localhost:8090/my/index][http_localhost_8090_my_index]  
Controller 的配置的url：  
![这里写图片描述][70 4]  
这又是什么原因？？？  
其中，去掉类上的RequestMapping（“/my”）然后访问[http://localhost:8090/index][http_localhost_8090_index]即可，加上就报如上错误，奇怪？  
改了一个地方，碰巧可以了，就是框中的value原先是WEB-INF/view/，然后在前面添加一斜杠后如下图所示就可以了。。。  
![这里写图片描述][70 5]

[70]: /images/20220523/608e82325ec44ff193e47ac83ac4b67e.png
[70 1]: /images/20220523/b45b9317bc9044c78e6b3cab40d1dfa2.png
[70 2]: /images/20220523/dc1ac5d53f04434a8e47cc2079f1a9b5.png
[70 3]: /images/20220523/cb56329e0d14461b9cb19bd584dcc6b9.png
[http_localhost_8090_my_index]: http://localhost:8090/my/index
[70 4]: /images/20220523/2ccbe3b9468d456b8d90fa0682b55e7d.png
[http_localhost_8090_index]: http://localhost:8090/index
[70 5]: /images/20220523/84f1c805a51e4738baf97f7aa9594532.png