ssm中的中Failed to load resource: the server responded with a status of 404 ()

合集 - 报错(63)

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56.ssm中的中Failed to load resource: the server responded with a status of 404 ()2021-08-31

57.Maven之IDEA创建XML Configuration File时没有Spring Config的选项2021-08-0458.MVC之Error:java: 不再支持源选项 5。请使用 6 或更高版本。2021-08-0459.Maven之Failed to execute goal org.apache.maven.plugins:maven-install-plugin:2.4:install (default-cli)2021-07-2660.在安装Maven检查版本时出现Please set the JAVA_HOME variable in your environment to match the locat2021-07-2561.在linux下 wget 下载报错 http request sent,awaiting response... 404 not found2021-07-2462.异常之java.lang.nullpointerexception 怎么解决及出现原因？2021-07-1663.JavaWeb之MVC---数据库连接问题2021-06-10

收起

一、运行环境

win11+idea2020.01+springmvc+tomcat7插件+maven3.8

二、在ssm整合过程中遇到的下列问题:

No mapping for GET /team/list.do

Failed to load resource: the server responded with a status of 404 ()

GET http://localhost:8080/team/list.do 404 (Not Found)

SSM框架下 Failed to load resource: the server responded with a status of 404 (Not Found)错误
​

三、解决方向:

1.出现404,就需要检查路径(以及url)与拦截器,可能是自己的url不对
2.可能是没写Controller映射地址或者没写对
3.不写映射地址是找不到的,如下图:

4.实在不行改一下dispatcherServlet地址即根路径( / ),改为 *.do或者其他的

<!-- 配置拦截路径url，所有请求都会被前端控制器拦截处理 -->
<servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
    <!--<url-pattern>*.do</url-pattern>-->
</servlet-mapping>

5.如果没进入方法，就需要注意 注解生效没 ，还有开启注解没和扫描没？
开启注解<mvc:annotation-driven/>
扫描：

  <context:component-scan base-package="com.xzk.pojo,com.xzk.mapper,com.xzk.service"/>

最终找到问题所在当初是把映射文件中的classpath给删掉了

<property name="mapperLocations" value="com/xzk/mapper/*.xml"/>

四、最终解决办法：

加上classpath

<property name="mapperLocations" value="classpath:com/xzk/mapper/*.xml"/>

现在解决了这处问题，后面的需要使用 / 或 *.do等访问随之而解开了

当初出现这类问题时，花了许多时间来处理，仍然没解决，寻求帮助下才解决。解决问题时使用tomcat插件环境下很难找到具体问题所在,实在不行就使用本地安装的tomcat环境下运行,再找相应的问题，就容易找到。

注:在dispatcherServlet下的 /，该处与

没什么关系,上图这些是静态资源放行,跟杠没关系,此处的杠就是根路径。

需要了解更多，请移步 [[spring mvc]<mvc: annotation-driven />的作用]
SpringMVC地址映射成功但浏览器访问发生404
springMVC之入门