ApplicationContext.getAppContext（）。getBean（“ jBeanName”）在Junit测试中返回null

Question

我确实有一个用@Configuration注释的简单类>

@ConfigurationProperties("sample")
@Configuration
public class Sample {

    private String username;
    private String password;
    private String url; 

//Implementation }
为了获得我的Web应用程序bean文件，我创建了此类

@Component
public class AppSpringContext implements ApplicationContextAware {

    private static ApplicationContext context;

    /**
     * Returns the Spring managed bean instance of the given class type if it exists.
     * Returns null otherwise.
     *
     * @param
     * @return
     */
    @Override
    public void setApplicationContext(ApplicationContext context) throws BeansException {

        // Store ApplicationContext reference to access required beans later on
        AppSpringContext.context = context;
    }

    public static ApplicationContext getAppContext() {
        return context;
    }

}
[当我尝试在测试类中实例化示例类时，尽管我能够在主类中成功实例化它，但我得到了空指针异常

@RunWith(SpringJUnit4ClassRunner.class)
public class SampleTest {



    private Sample getInstance(Sample cfg) {

        if (cfg == null) {
            cfg = (Sample) AppSpringContext.getAppContext().getBean("sample"); //returns  NULL object
        }
        return cfg; }

//Rest of  implementation

}
任何帮助plzz吗？ 

我确实有一个用@Configuration @ConfigurationProperties（“ sample”）注释的简单类，@Configuration公共类Sample {private String username;私有字符串密码； ...

Answer 1

更改@ConfigurationProperties("sample") @Configuration