springboot 获取上下文方法

朱雀 2022-05-29 02:38 604阅读 0赞

1.创建上下文工具类SpringContextUtil，具体内容如下:

private static ApplicationContext applicationContext;    
    //获取上下文    
    public static ApplicationContext getApplicationContext() \{    
        return applicationContext;    
    \}    
    
    //设置上下文    
    public static void setApplicationContext(ApplicationContext applicationContext) \{    
        SpringContextUtil.applicationContext = applicationContext;    
    \}    
    
    //通过名字获取上下文中的bean    
    public static Object getBean(String name)\{    
        return applicationContext.getBean(name);    
    \}    
        
    //通过类型获取上下文中的bean    
    public static Object getBean(Class<?> requiredType)\{    
        return applicationContext.getBean(requiredType);

2.  向applicationContext注入值

在springboot里的main方法中加入setApplicationContext即可。

public static void main(String\[\] args) \{  
ApplicationContext app = SpringApplication.run(XyeAgentApplication.class, args);  
SpringContextUtil.setApplicationContext(app);

3. 测试

ApplicationContext atx = SpringContextUtil.getApplicationContext();

agentBillJobService =  (IAgentBillJobService) atx.getBean("agentBillJobService");

通过getBean方法就可以获得接口对应的方法了。

4. 实现接口ApplicationContextAware获取上下文。

@Component
    public class SpringContextUtil implements ApplicationContextAware {
       private static ApplicationContext applicationContext;
    
       @Override
       public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
          SpringContextUtil.applicationContext = applicationContext;
       }
    
       public static Object getBean(String name) {
          return applicationContext.getBean(name);
       }
       public static <T> T getBean(Class<T> clazz){
          return applicationContext.getBean(clazz);
       }
    
       public static <T> T getBean(String name, Class<T> requiredType) {
          return applicationContext.getBean(name, requiredType);
       }
    
       public static boolean containsBean(String name) {
          return applicationContext.containsBean(name);
       }
    
       public static boolean isSingleton(String name) {
          return applicationContext.isSingleton(name);
       }
    
       public static Class<?> getType(String name) {
          return applicationContext.getType(name);
       }
    
    }