我有3種類型。彈簧依賴注入的NullPointerException
ServiceAffaire.java:
package ws.magicnew.sync;
...
@Transactional
@Service("serviceAffaire")
public class ServiceAffaire implements IServiceAffaire {
private static Log log = LogFactory.getLog(ServiceAffaire.class);
//private static SimpleDateFormat sdf = new SimpleDateFormat(MagicFacade.WS_DATE_FORMAT);
@Autowired
@Qualifier("manifestationService")
protected IManifestationService manifestationService;
@Autowired
@Qualifier("typeDeManifestationService")
protected ITypeDeManifestationService typeService;
@Autowired
@Qualifier("espaceManifestationService")
protected IEspaceManifestationService espaceManifService;
@Autowired
@Qualifier("siteService")
protected ISiteService siteService;
@Autowired
@Qualifier("natureService")
protected INatureService natureService;
@Autowired
@Qualifier("facadeGetAffaire")
protected MagicFacade facadeGetAffaire;
@Autowired
@Qualifier("compteurManifestation")
private Compteur compteurManifestation;
@Autowired
@Qualifier("compteurContenus")
protected Compteur compteurContenus;
public synchronized void synchronize(boolean setFlag) throws Exception {
...
}
}
IServiceAffaire.java:
package ws.magicnew.sync;
public interface IServiceAffaire {
public void synchronize(boolean setFlag) throws Exception;
}
和CacheAction.java:
package ws.magicnew.sync;
...
@Configurable
@Transactional
public class CacheAction extends DispatchAction {
private static Log log = LogFactory.getLog(CacheAction.class);
@Autowired
@Qualifier("serviceAffaire")
private IServiceAffaire serviceAffaire;
public ActionForward getAffaire(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
boolean setFlag = Boolean.parseBoolean(CmsProperties.SYNCRO_AFFAIRES_FLAG);
log.info("getAffaire debut " +setFlag);
serviceAffaire.synchronize(setFlag); // NullPointerException here: serviceAffaire is null
log.info("getAffaire fin " +setFlag);
request.setAttribute("message", "Le service get affaire a été lancé.");
return mapping.findForward("cache");
}
}
佈線是在的applicationContext-scanpackages.xml文件進行:
<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:ehcache="http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring"
xmlns:jaxws="http://cxf.apache.org/jaxws"
xmlns:cxf="http://cxf.apache.org/core"
xsi:schemaLocation="
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
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-3.0.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.0.xsd
http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring
http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring/ehcache-spring-1.1.xsd
http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd
http://cxf.apache.org/core http://cxf.apache.org/schemas/core.xsd">
<context:annotation-config />
<context:component-scan base-package="ws.magicnew.sync" />
<context:component-scan base-package="ws.magicnew.facade" />
</beans>
這對我來說似乎沒問題,但當我調用CacheAction.getAffaire()方法時,我仍然會得到一個NullPointerException
。我無法弄清楚爲什麼,這讓我發瘋。任何線索?
我以前有一些注入ServiceAffaire屬性的問題(我解決了這個問題),所以Spring實際上是自動裝配它們的。但由於某種原因,無法將ServiceAffaire注入到CacheAction中。
如代碼中的註釋所示,當調用ServiceAffaire.synchronize時,serviceAffaire屬性爲null,如我在調試模式下執行時所看到的。
提示:青睞'@Resource(name = 「..」 )而不是'@ Qualifier/@ Autowired'組合。 –
嗯..你不必給 –
smk
@Sajit:你是對的。我忘了把它放在提問中。我會編輯它。 –