Spring Boot 获取上下文环境

在Spring中可以通过ContextLoader获取上下文环境

WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();

但是这种方式在Spring Boot是失效的。本文提供三种方案获取Spring Boot上下文环境。

1. 自动注入

   @Autowired
   WebApplicationContext webApplicationConnect;
   

2. 实现ApplicationContextAware接口

   /**
    * spring bean 工具类
    *
    * @author simon
    * @create 2018-09-10 9:51
    **/
   @Component
   public class SpringBeanTool implements ApplicationContextAware {
     /**
      * 上下文对象实例
      */
     private static ApplicationContext applicationContext;
     
     @Override
     public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
       this.applicationContext = applicationContext;
     }
     /**
      * 获取applicationContext
      *
      * @return
      *      applicationContext
      */
     public static ApplicationContext getApplicationContext() {
       return applicationContext;
     }
     
     /**
      * 通过name获取 Bean.
      *
      * @param name
      *          bean name
      * @return
      *          bean
      */
     public static Object getBean(String name){
       return getApplicationContext().getBean(name);
     }
     
     /**
      * 通过class获取Bean.
      * @param clazz
      *          class
      * @param <T>
      * @return
      */
     public static <T> T getBean(Class<T> clazz){
       return getApplicationContext().getBean(clazz);
     }
     
     /**
      * 通过name,以及Clazz返回指定的Bean
      * @param name
      *          bean name
      * @param clazz
      *          class
      * @param <T>
      * @return
      *          bean
      */
     public static <T> T getBean(String name,Class<T> clazz){
       return getApplicationContext().getBean(name, clazz);
     }
   }
   
   

3. 在启动类中设置

   public class SpringBeanTool {
       private static ApplicationContext applicationContext;
    
       public static ApplicationContext getApplicationContext(){
           return applicationContext;
       }
    
       public static void setApplicationContext(ApplicationContext applicationContext){
           SpringContextUtil.applicationContext = applicationContext;
       }
    
       public static <T> T getBean(String name){
           return (T)applicationContext.getBean(name);
       }
    
       public static <T> T getBean(Class<T> clazz){
           return applicationContext.getBean(clazz);
       }
   }
   

   启动类：

   public static void main(String[] args) {
       ApplicationContext context = SpringApplication.run(Application.class, args);
       SpringBeanTool.setApplicationContext(context);
   }