主页 / 问题 / 711560
Accepted
Adrenal1ne
Asked:2020-08-28 22:11:52 +0000 UTC2020-08-28 22:11:52 +0000 UTC

如何在不是 bean 的类对象中获取 Spring 上下文？

  • 772

下午好！有一个网络应用程序。AppConfig.java

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "net.package")
@EnableJpaRepositories("net.package.repository")
public class AppConfig extends WebMvcConfigurerAdapter{

@Autowired
RoleToUserProfileConverter roleToUserProfileConverter;

@Bean(name = "applicationContextProvder")
public ApplicationContextProvider getApplicationContextProvider() {
    return new ApplicationContextProvider();
}

@Bean(name="multipartResolver")
public CommonsMultipartResolver getResolver() throws IOException {
    CommonsMultipartResolver resolver = new CommonsMultipartResolver();
    //Set the maximum allowed size (in bytes) for each individual file.
    resolver.setMaxUploadSizePerFile(5242880);//5MB
    //You may also set other available properties.
    return resolver;
}

@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
    InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
    viewResolver.setViewClass(JstlView.class);
    viewResolver.setPrefix("/WEB-INF/views/");
    viewResolver.setSuffix(".jsp");
    registry.viewResolver(viewResolver);
}

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/static/**").addResourceLocations("/static/");
    registry.addResourceHandler("/favicon.ico"). addResourceLocations("/favicon.ico");

}

@Override
public void addFormatters(FormatterRegistry registry) {
    registry.addConverter(roleToUserProfileConverter);
}

@Bean
public MessageSource messageSource() {
    ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
    messageSource.setBasename("messages");
    return messageSource;
}

@Override
public void configurePathMatch(PathMatchConfigurer matcher) {
    matcher.setUseRegisteredSuffixPatternMatch(true);
}

通常可以像这样获得上下文：

@Autowired
private ApplicationContext ctx;

所以你可以在一个类（不是一个bean）中创建一个上下文：

private ApplicationContext context =
        new AnnotationConfigApplicationContext(AppConfig.class,     HibernateConfiguration.class, MyAppConfigForAsync.class);

你能告诉我如何在一个不是 bean 的类对象中获取在应用程序服务器启动时已经创建的 Spring 上下文吗？

java

1 个回答

  1. Best Answer

    您可以创建一个将 spring 上下文注入静态变量的 spring bean：

    @Component
public class ApplicationContextHolder {

    // Контекст Spring
    private static ApplicationContext ctx;

    @Autowired
    public ApplicationContextHolder(ApplicationContext applicationContext) {
        ApplicationContextHolder.ctx = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        return ctx;
    }
}

    然后在另一个类中使用：

    public class NotBean {
    private final ApplicationContext ctx;

    public NotBean() {
        ctx = ApplicationContextHolder.getApplicationContext();
    }
}

    更新- 使用ApplicationContextAware的变体

    @Component
public class ApplicationContextHolder implements ApplicationContextAware {

    // Контекст Spring
    private static ApplicationContext ctx;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        ApplicationContextHolder.ctx = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        return ctx;
    }
}
    • 4

相关问题