java将Springbean注入到使用new()创建的外部类中
我试图在课堂上使用spring bean。我正在从另一个Springbean访问这个类。我尝试过使用AutoWireCapableBeanFacory
和@Configurable+AspectJ LTW,但我一次又一次地得到java.lang.UnsupportedOperationException
我的设想如下:
ServiceOneImpl
调用MyClass
,并且MyClass
使用另一个名为MyService
的bean(自动连线)
//-------------------ServiceOne--------------
@Service("serviceOne")
public class ServiceOneImpl implements ServiceOne {
@Override
public void myMethod() {
ClassA obj = new ClassA(arg1,arg2);
obj.doSometing();
}
}
//-------------------MyService-------------
@Service("myService")
public class MyServiceImpl implements MyService {
@Override
public MyDTO getConfiguration(String arg) {
return myDao.getConfiguration(arg);
}
}
//-------------------MyClass--------------
@Component
public Class MyClass {
@Autowired
private MyService myService;
private MyDTO myDTO;
private String mailhost;
private String arg1;
private String arg2;
public A() {
}
public A(String param1, String param2) {
ServletContext context = (ServletContext) FacesContext.getCurrentInstance().getExternalContext().getContext();
ApplicationContext applicationContext = WebApplicationContextUtils.getWebApplicationContext(context);
applicationContext.getAutowireCapableBeanFactory().
autowireBeanProperties(this, AutowireCapableBeanFactory.AUTOWIRE_AUTODETECT,
true);
myDTO = myService.getConfiguration();
mailhost = myDTO.getMailhost();
//Do some process
}
public doSometing() {
//Do some process
}
}
但是我得到java.lang.UnsupportedOperationException
MyService
没有自动连线,它返回空值
javax.faces.el.EvaluationException: java.lang.UnsupportedOperationException
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
at com.beo.atlas.common.filter.ClientSideCacheClearingFilter.doFilter(ClientSideCacheClearingFilter.java:34)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersisten
我正在使用SpringFramework 4.0.3.RELEASE
我无法解决这个问题。如果有人能给我一些启示,那将对我大有裨益
提前谢谢
伊莫
# 1 楼答案
除非有充分的理由这样做,否则在希望Spring将bean连接到对象时不要使用
new
。避免将域类与Spring绑定IMHO,你最好使用一个定制的生成器bean:
并相应地修改
ServiceOne
:这样一来,
A
(或MyClass
或ClassA
)对Spring就没有明确的依赖性,并将通过它的生成器注入其他bean当然,这不是真正的代码(参数和命名不一致),但你的代码也不是
# 2 楼答案
请加上:
在spring配置中
然后在MyClass中添加@Configurable而不是@Component
# 3 楼答案
我通过向autowired属性添加@Lazy注释解决了这个问题
未来参考的完整代码:
希望它能帮助别人:)