java - SSM framework, no error is reported in the console, but 404 is reported during page testing

Question

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

     xmlns="http://java.sun.com/xml/ns/javaee"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
     version="3.0">

<display-name>Archetype Created Web Application</display-name>
<!-- Spring和mybatis的配置文件 -->
<context-param>

<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>

</context-param>
<!-- 编码过滤器 -->
<filter>

<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<async-supported>true</async-supported>
<init-param>
  <param-name>encoding</param-name>
  <param-value>UTF-8</param-value>
</init-param>

</filter>
<filter-mapping>

<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>

</filter-mapping>
<!-- Spring监听器 -->
<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>
<!-- 防止Spring内存溢出监听器 -->
<listener>

<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>

</listener>

<!-- Spring MVC servlet -->
<servlet>

<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>

</servlet>
<servlet-mapping>

<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>

</servlet-mapping>

<filter>

<filter-name>RespFilter</filter-name>
<filter-class>me.lihs.java.utils.ResponseFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>RespFilter</filter-name>
<url-pattern>/*</url-pattern>

</filter-mapping>

<welcome-file-list>

<welcome-file>/index.jsp</welcome-file>
<welcome-file>/index.html</welcome-file>

</welcome-file-list>
</web-app>

spring-mybatis.xml

<?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:p="http://www.springframework.org/schema/p"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:mvc="http://www.springframework.org/schema/mvc"
   xsi:schemaLocation="http://www.springframework.org/schema/beans
                    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                    http://www.springframework.org/schema/context
                    http://www.springframework.org/schema/context/spring-context-3.1.xsd
                    http://www.springframework.org/schema/mvc
                    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

<!-- 自动扫描 -->
<context:component-scan base-package="me.lihs.java"/>
<!-- 引入配置文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

<property name="location" value="classpath:jdbc.properties"/>

</bean>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">

<property name="driverClassName" value="${driver}"/>
<property name="url" value="${dbUrl}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"/>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${maxActive}"/>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${maxIdle}"/>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${minIdle}"/>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${maxWait}"/>

</bean>

<!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

<property name="dataSource" ref="dataSource"/>
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:me/lihs/java/mapping/*.xml"/>

</bean>

<!-- DAO接口所在包名，Spring会自动查找其下的类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

<property name="basePackage" value="me.lihs.java.dao"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>

</bean>

</beans>

spring-mvc.xml

<?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/beans
                    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
                    http://www.springframework.org/schema/context
                    http://www.springframework.org/schema/context/spring-context-4.0.xsd
                    http://www.springframework.org/schema/mvc
                    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

<!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 -->
<context:component-scan base-package="me.lihs.java.controller"/>

<!--To prevent IE from returning JSON and downloading files when executing AJAX -->
<bean id="mappingJacksonHttpMessageConverter"

    class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="supportedMediaTypes">
  <list>
    <value>text/html;charset=UTF-8</value>
  </list>
</property>

</bean>

<!-- Start the annotation function of SpringMVC and complete the mapping of requests and annotation POJOs -->
<bean

class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
  <list>
    <ref bean="mappingJacksonHttpMessageConverter"/> <!-- JSON转换器 -->
  </list>
</property>

</bean>
<!-- Define the suffix and suffix of the jump file, view mode configuration-->
<bean class="org.springframework.web.servlet.view .InternalResourceViewResolver">

<!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 -->
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>

</bean>

<!-- Configure file upload. If you do not use file upload, you do not need to configure it. Of course, if it is not configured, then there is no need to introduce the upload component package in the configuration file-->
<!--<bean id="multipartResolver"-->

    <!--class="org.springframework.web.multipart.commons.CommonsMultipartResolver">-->
<!--<!&ndash; 默认编码 &ndash;>-->
<!--<property name="defaultEncoding" value="utf-8"/>-->
<!--<!&ndash; 文件大小最大值 &ndash;>-->
<!--<property name="maxUploadSize" value="500000000"/>-->
<!--<!&ndash; 内存中的最大值 &ndash;>-->
<!--<property name="maxInMemorySize" value="40960"/>-->

<!--</bean>-->
<mvc:default-servlet-handler/>
</beans>

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Answer 1

If 404 is reported, there is something wrong with the page, web.xml, spring mvc configuration file, and Controller

---

1. / changed to /*

2. Take a look at the Controller code and check whether the returned view is correct and whether it can correspond to the jsp page

Answer 2

<url-pattern>/</url-pattern> will match path-type URLs such as /login, but will not match suffix-type URLs such as *.jsp

<url-pattern>/</url-pattern> will match all URLs: path-type and suffix-type URLs (including /login, .jsp, .js and .html, etc.)

<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>

There is nothing wrong with the poster's configuration. There is no need to change / to /*. Please don't mislead people upstairs.

Answer 3

Please post the @RequestMapping configuration of the controller.