Spring @Autowired（required = true）为空 [英] Spring @Autowired(required = true) is null

问题描述

我有一个webmodule与JSF 2结束Spring 4.3。在支持bean中，我使用JAR服务的 @Autowired 。在EAR模块中有WAR，JAR与 @Service Spring和JAR与Spring配置文件。

code> web.xml 片段：

 < context-param> 
< param-name> locatorFactorySelector< / param-name> 
< param-value> classpath：beanRefContext.xml< / param-value> 
< / context-param> 
 
< context-param> 
< param-name> parentContextKey< / param-name> 
< param-value> sharedContext< / param-value> 
< / context-param> 
< 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> 
 
< listener> 
< listener-class> org.springframework.web.context.request.RequestContextListener< / listener-class> 
< / listener> 
  

applicationContext.xml ：

 < context：annotation-config /> 
< context：spring-configured /> 
<！ - 在EAR中的jar模块中的@Service类的包 - > 
< context：component-scan base-package =com.ipdb.service/> 
  

beanRefContext.xml：

 < bean id =sharedContextclass =org.springframework.context.support.ClassPathXmlApplicationContext> <构造精氨酸> 
< list> 
< value> spring-ctx.xml< / value> 
< / list> 
< / constructor-arg> < /豆腐> 
  

当我使用 @Autowired（required = null）在Backing Bean中，值为 null （没有任何异常）。我的JSF bean

  @Component 
 @ManagedBean 
 @ViewScoped 
 public class PortfolioController {
 
 
 @Autowired（required = true）
 private PortfolioService portfolioService; 
 
 ... 
  

可以帮我吗>

解决方案

PortfolioController 被认为是一个 JSF 上下文bean添加 @Component 到 @ManagedBean 是完全错误的，你不能标记与bean类似的类两个不同的上下文（ JSF 和 Spring ）。

两个解决方案可使 PortfolioController 一个spring bean，从而删除 @ManagedBean 和 @ViewScoped 或注入 PortfolioController 通过 JSF 注释注释 @ManagedProperty

  @ManagedProperty（＃{portfolioService} ）
 private PortfolioService portfolioService; 
  

I have a webmodule with JSF 2 end Spring 4.3. In a backing bean I use @Autowired for DI of a service of a JAR. In EAR module there are WAR, JAR with @Service Spring and JAR with Spring configuration file.

Below a web.xml snippet:

    <context-param>
        <param-name>locatorFactorySelector</param-name>
        <param-value>classpath:beanRefContext.xml</param-value>
    </context-param>

    <context-param>
        <param-name>parentContextKey</param-name>
        <param-value>sharedContext</param-value>
    </context-param>
    <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>

    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>

applicationContext.xml:

    <context:annotation-config />
    <context:spring-configured />
<!-- package of @Service class in jar module in EAR-- >
    <context:component-scan base-package="com.ipdb.service" /> 

beanRefContext.xml:

<bean id="sharedContext" class="org.springframework.context.support.ClassPathXmlApplicationContext">    <constructor-arg>
    <list>
        <value>spring-ctx.xml</value>
    </list>
</constructor-arg>    </bean>

When I Use @Autowired(required=null) in a Backing Bean the value is null (there is not any exception). My JSF bean

@Component
@ManagedBean
@ViewScoped
public class PortfolioController {


    @Autowired(required = true)
    private PortfolioService portfolioService;

...

Can you help me, please.

解决方案

PortfolioController is considered a JSF context bean adding @Component to @ManagedBean is totally wrong you can't mark same class as bean in two different contexts (JSF and Spring ).

Two solutions either make PortfolioController a spring bean thus remove the @ManagedBean and @ViewScoped or inject PortfolioController via JSF injection annotation @ManagedProperty

@ManagedProperty("#{portfolioService}")
private PortfolioService portfolioService;

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