昨天搭建了个Spring mvc + hibernate 的框架。
发现不管怎么样,页面都是无法正常跳转,都是 HTTP Status 404
研究了一下,发现该配置的都配置上去了。但是还是不行。
先贴一下代码,大家能不能看出来有什么问题。
1.applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p">
<!-- 加载数据库属性配置文件 -->
<context:property-placeholder location="classpath:config/hibernate/db.properties"/>
<!-- 数据库连接池c3p0配置 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="jdbcUrl" value="${db.url}"></property>
<property name="driverClass" value="${db.driverClassName}"></property>
<property name="user" value="${db.username}"></property>
<property name="password" value="${db.password}"></property>
<property name="maxPoolSize" value="40"></property>
<property name="minPoolSize" value="1"></property>
<property name="initialPoolSize" value="1"></property>
<property name="maxIdleTime" value="20"></property>
</bean>
<!-- 配置自动扫描的包 -->
<context:component-scan base-package="com.jiang.*" />
<!-- session工厂 -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource"></ref>
</property>
<property value="classpath:config/hibernate/hibernate.cfg.xml"
name="configLocation"></property>
<!-- 自动扫描注解方式配置的hibernate类文件 -->
<property name="packagesToScan">
<list>
<value>com.jiang.*</value>
</list>
</property>
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager"
class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<tx:annotation-driven/>
<!-- 配置事务通知属性 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<!-- 定义事务传播属性 -->
<tx:attributes>
<tx:method name="insert*" propagation="REQUIRED" />
<tx:method name="update*" propagation="REQUIRED" />
<tx:method name="edit*" propagation="REQUIRED" />
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="new*" propagation="REQUIRED" />
<tx:method name="set*" propagation="REQUIRED" />
<tx:method name="remove*" propagation="REQUIRED" />
<tx:method name="delete*" propagation="REQUIRED" />
<tx:method name="change*" propagation="REQUIRED" />
<tx:method name="get*" propagation="REQUIRED" read-only="true" />
<tx:method name="find*" propagation="REQUIRED" read-only="true" />
<tx:method name="load*" propagation="REQUIRED" read-only="true" />
<tx:method name="*" propagation="REQUIRED" read-only="true" />
</tx:attributes>
</tx:advice>
<!-- 配置事务切点, 并把切点和事务属性关联起来 -->
<aop:config>
<aop:pointcut expression="execution(* com.jiang.service.*.*(..))"
id="txPointcut" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut" />
</aop:config>
</beans>
2.springmvc-servlet.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" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd">
<!-- 定义注解驱动Controller方法处理适配器 -->
<bean
class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list>
<bean
class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html; charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
<bean
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html; charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
</list>
</property>
</bean>
<!-- 默认的注解映射的支持 -->
<mvc:annotation-driven />
<!-- 对模型视图名称的解析,即在模型视图名称添加前后缀 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
</bean>
</beans>
3.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/j2ee" xmlns:javaee="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" id="starter" version="2.4">
<display-name>
</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- 字符串过滤器 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath*:config/spring/*applicationContext.xml
</param-value>
</context-param>
<!-- Spring MVC配置 -->
<servlet>
<servlet-name>springmvc4</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath*:config/spring/*servlet.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc4</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<!-- hibernate 配置 -->
<filter>
<filter-name>openSessionInViewFilter</filter-name>
<filter-class>
org.springframework.orm.hibernate5.support.OpenSessionInViewFilter
</filter-class>
<init-param>
<param-name>singleSession</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>openSessionInViewFilter</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
</web-app>
加上了log4j,发现执行action跳转的时候也是没有任何反应。
觉得@controller 这个根本没有启动。经研究发现了这个问题的原因:
应用里边启动了2个容器,一个容器是spring root,还有个是springmvc。 springmvc 中无法获得spring root 中注册的bean。所以得不到@controller 这个注解对应的bean,执行action 无效了。 springroot 可以获得 springmvc 中注册的bean,所以整个应用可以正常加载,不会出现 @Component,@Service 之类的找不到的情况。
以下是解决方法。
方法1:
<!-- 配置自动扫描的包 -->
<context:component-scan base-package="com.jiang.*" />
把代码放到 springmvc-servlet.xml 里边就能正常运行了。
方法2
applicationContext.xml 中不扫描@Controller 这个注解
改在springmvc-servlet.xml 中扫描.
参考代码:
applicationContext.xml 加入
<!-- 配置扫描的包 -->
<context:component-scan base-package="com.jiang.*">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
springmvc-servlet.xml 加入
<!-- 配置扫描<span style="font-family: Arial, Helvetica, sans-serif;">的</span><span style="font-family: Arial, Helvetica, sans-serif;">包 --></span>
<context:component-scan base-package="com.jiang.*">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>