如何在servlet过滤器中获取Spring bean? [英] How can I get a Spring bean in a servlet filter?
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问题描述
我已经定义了javax.servlet.Filter
,并且具有带有Spring注释的Java类.
I have defined a javax.servlet.Filter
and I have Java class with Spring annotations.
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Bean;
@Configuration
public class SocialConfig {
// ...
@Bean
public UsersConnectionRepository usersConnectionRepository() {
// ...
}
}
我想在我的Filter
中获取bean UsersConnectionRepository
,所以我尝试了以下操作:
I want to get the bean UsersConnectionRepository
in my Filter
, so I tried the following:
public void init(FilterConfig filterConfig) throws ServletException {
UsersConnectionRepository bean = (UsersConnectionRepository) filterConfig.getServletContext().getAttribute("#{connectionFactoryLocator}");
}
但是它总是返回null
.如何在Filter
中获得Spring bean?
But it always returns null
. How can I get a Spring bean in a Filter
?
推荐答案
尝试:
UsersConnectionRepository bean =
(UsersConnectionRepository)WebApplicationContextUtils.
getRequiredWebApplicationContext(filterConfig.getServletContext()).
getBean("usersConnectionRepository");
其中usersConnectionRepository
是应用程序上下文中bean的名称/标识.甚至更好:
Where usersConnectionRepository
is a name/id of your bean in the application context. Or even better:
UsersConnectionRepository bean = WebApplicationContextUtils.
getRequiredWebApplicationContext(filterConfig.getServletContext()).
getBean(UsersConnectionRepository.class);
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