Java 向使用new()创建的外部类注入Springbean
我正在尝试在类中使用Springbean。我正在从另一个Springbean访问这个类。我曾尝试使用Java 向使用new()创建的外部类注入Springbean,java,spring,spring-mvc,Java,Spring,Spring Mvc,我正在尝试在类中使用Springbean。我正在从另一个Springbean访问这个类。我曾尝试使用AutoWireCapableBeanFacory和@Configurable+AspectJ LTW,但一次又一次地得到java.lang.UnsupportedOperationException 我的设想如下: ServiceOneImpl调用MyClass,并且MyClass使用另一个名为MyService(自动连线)的bean 但是我得到的是java.lang.UnsupportedOp
AutoWireCapableBeanFacory
和@Configurable+AspectJ LTW,但一次又一次地得到java.lang.UnsupportedOperationException
我的设想如下:
ServiceOneImpl
调用MyClass
,并且MyClass
使用另一个名为MyService
(自动连线)的bean
但是我得到的是java.lang.UnsupportedOperationException
MyService
没有自动连接,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
我使用的是springframework4.0.3.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
iMmo请添加:
<context:spring-configured />
在spring配置中
然后在MyClass中添加@Configurable而不是@Component 如果希望Spring将bean连接到对象,除非有充分的理由这样做,否则不要使用
new
。并避免将域类绑定到Spring
IMHO,您最好使用自定义构建器bean:
public class ABuilder {
@Autowired
private MyService myService;
public A getA(String param1, String param2) {
A a = new A(param1, param2);
a.setMyDTO(myService.getConfiguration());
a.setMailhost(myDTO.getMailhost());
return a;
}
}
并相应修改ServiceOne
:
//-------------------ServiceOne--------------
@Autowired
ABuilder aBuilder;
@Service("serviceOne")
public class ServiceOneImpl implements ServiceOne {
@Override
public void myMethod() {
ClassA obj = aBuilder.getA(arg1, arg2);
obj.doSometing();
}
}
这样,A
(或MyClass
或ClassA
)就可以对Spring没有显式的依赖性,并将通过其生成器注入其他bean
当然,这不是真正的代码(参数和命名不一致),但您的代码也不是…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:
//-------------------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
@Lazy
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_BY_NAME,true);
myDTO = myService.getConfiguration();
mailhost = myDTO.getMailhost();
//Do some process
}
public doSometing() {
//Do some process
}
}
希望它能帮助别人:)所有这些似乎都是春豆,那你为什么要用新的呢?改为在Spring上下文中配置工厂。@组件标记是我的一个错误,因为我认为使用它会使它成为一个bean,实际上“MyClass”是一个常见的类,我需要使用构造函数重载调用该类,我的项目负责人希望将其用于新的MyClass(…)构造函数。我仍然认为最干净的方法是在Spring中为类创建一个工厂,它可以在类中注入更多的依赖项。我尝试过@Configurable and-javaagent:Spring-aspect.jar,但没有效果,我已经在我的问题中提到了,谢谢兄弟的宝贵建议。我会看一看,我一定会尝试的。但我在自动连线bean中添加了@Lazy,目前似乎一切正常,我不认为我的解决方案是合适的,顺便说一句,我不能在这里使用确切的代码,因为我担心专有法会给我带来问题:)
//-------------------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
@Lazy
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_BY_NAME,true);
myDTO = myService.getConfiguration();
mailhost = myDTO.getMailhost();
//Do some process
}
public doSometing() {
//Do some process
}
}