java - SSM框架，控制臺沒報錯，在頁面測試的時候報404
問題描述
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> <!-- 編碼過濾器 --> <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監聽器 --> <listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> <!-- 防止Spring內存溢出監聽器 --> <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'>
<!-- 自動掃描 --> <context:component-scan base-package='me.lihs.java'/> <!-- 引入配置文件 --> <bean class='org.springframework.beans.factory.config.PropertyPlaceholderConfigurer'>
<property name='location' value='classpath:jdbc.properties'/>
</bean>
<bean destroy-method='close'>
<property name='driverClassName' value='${driver}'/><property name='url' value='${dbUrl}'/><property name='username' value='${username}'/><property name='password' value='${password}'/><!-- 初始化連接大小 --><property name='initialSize' value='${initialSize}'/><!-- 連接池最大數量 --><property name='maxActive' value='${maxActive}'/><!-- 連接池最大空閑 --><property name='maxIdle' value='${maxIdle}'/><!-- 連接池最小空閑 --><property name='minIdle' value='${minIdle}'/><!-- 獲取連接最大等待時間 --><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 class='org.mybatis.spring.SqlSessionFactoryBean'>
<property name='dataSource' ref='dataSource'/><!-- 自動掃描mapping.xml文件 --><property name='mapperLocations' value='classpath:me/lihs/java/mapping/*.xml'/>
</bean>
<!-- DAO接口所在包名，Spring會自動查找其下的類 --> <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'>
<!-- 自動掃描該包，使SpringMVC認為包下用了@controller注解的類是控制器 --> <context:component-scan base-package='me.lihs.java.controller'/>
<!--避免IE執行AJAX時，返回JSON出現下載文件 --> <bean id='mappingJacksonHttpMessageConverter'
class='org.springframework.http.converter.json.MappingJacksonHttpMessageConverter'><property name='supportedMediaTypes'> <list> <value>text/html;charset=UTF-8</value> </list></property>
</bean>
<!-- 啟動SpringMVC的注解功能，完成請求和注解POJO的映射 --> <bean
class='org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter'><property name='messageConverters'> <list> <ref bean='mappingJacksonHttpMessageConverter'/> <!-- JSON轉換器 --> </list></property>
</bean> <!-- 定義跳轉的文件的前后綴 ，視圖模式配置--> <bean class='org.springframework.web.servlet.view.InternalResourceViewResolver'>
<!-- 這里的配置我的理解是自動給后面action的方法return的字符串加上前綴和后綴，變成一個 可用的url地址 --><property name='prefix' value='/WEB-INF/jsp/'/><property name='suffix' value='.jsp'/>
</bean>
<!-- 配置文件上傳，如果沒有使用文件上傳可以不用配置，當然如果不配，那么配置文件中也不必引入上傳組件包 --> <!--<bean id='multipartResolver'-->
<!--class='org.springframework.web.multipart.commons.CommonsMultipartResolver'>--><!--<!– 默認編碼 –>--><!--<property name='defaultEncoding' value='utf-8'/>--><!--<!– 文件大小最大值 –>--><!--<property name='maxUploadSize' value='500000000'/>--><!--<!– 內存中的最大值 –>--><!--<property name='maxInMemorySize' value='40960'/>-->
<!--</bean>--> <mvc:default-servlet-handler/></beans>
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問題解答
回答1：報404的話，就是頁面、web.xml、spring mvc配置文件、Controller這幾個環節出了問題
1、/ 改為/*
2、把Controller代碼放出來看看，檢查返回的視圖是否正確，能否對應上jsp頁面
回答2：<url-pattern>/</url-pattern> 會匹配到/login這樣的路徑型url，不會匹配到模式為*.jsp這樣的后綴型url
<url-pattern>/</url-pattern> 會匹配所有url：路徑型的和后綴型的url(包括/login,.jsp,.js和.html等)
<servlet-name>SpringMVC</servlet-name> <url-pattern>/</url-pattern>
樓主的這段配置沒有問題，不需要/ 改為/* ，樓上不要誤導。
回答3：請貼個controller的@RequestMapping配置。
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