SpringMVC配置applicationContext.xml应该导入some-servlet.xml

Question

• SpringMVC applicationContext.xml（ApplicationContext）应该导入user-servlet.xml（WebApplicationContext）？

我使用web.xml加载ContextLoaderListener

配置applicationContext.xml

DispatcherServlet load user-servlet.xml发现控制器bean无法引用服务bean

目录结构

applicationContext.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:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="com.f.dao, com.f.service, com.f.advice"/>

    <aop:aspectj-autoproxy/>
</beans>

user-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:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <bean id="userController" class="com.f.controller.UserController"/>
    <mvc:annotation-driven/>
    <mvc:resources mapping="/statics/**" location="/statics/"/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/users/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <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:user-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

UPDATE1

上面运行在UserController上发现NoPointException，因为没有注入服务bean，下面是控制器的一部分

@RequestMapping(value = "/users")
@Controller
public class UserController {
    private Logger logger = LogManager.getLogger(UserController.class);

    @Autowired
    @Qualifier(value = "userService")
    private UserService userService;
}

如果向<import resource="applicationContext.xml"/>服务器添加user-servlet.xml运行正确。

但在web.xml ContextLoaderListener已加载applicationContext.xml并再次加载user-servlet.xml可能会有一些冗余

UPDATE2

我在applicationContext.xml有componentScan的配置，重命名SpringMVC-servlet.xml后删除init-param移动文件在WEB-INF中，控制器可以'找到服务bean，注入假

我想应该在web.xml中导入applicationContext.xml？

UserService

SpringMVC-serlve.xml

决心

因为我在@Service(value = "userService") public class UserServiceImpl implements UserService { @Qualifier(value = "userDao") @Autowired private UserMapper mapper; } 中使用<bean id="userController" class="com.f.controller.UserController"/>所以无法注入user-servlet.xml bean。

改变之后

UserService成功

Answer 1

请将spring bean配置文件user-servlet.xml名称更改为SpringMVC-servlet.xml并删除init-param条目。并将其移动到WEB-INF或映射资源文件夹中作为部署程序集中的根文件夹（用于eclipse ide）。它应该工作正常。

用于UserService问题 - 检查UserService类的注释。它应该使用@Service或任何其他类型注释注释，并且类必须驻留在componentScan声明的包中。此外，用户服务必须具有无arg默认构造函数，否则您需要实例化UserService类的依赖构造函数arg。