springboot獲取getBean方法以及ApplicationContext空指針問題解決

建立獲取ApplicationContext工具類：

 1 package com.performancetest.common.utils;  2 
 3 import org.springframework.beans.BeansException;  4 import org.springframework.context.ApplicationContext;  5 import org.springframework.context.ApplicationContextAware;  6 import org.springframework.stereotype.Component;  7 
 8 import java.util.Map;  9 
10 /**
11  * Spring Context 工具類 12  */
13 @Component 14 public class SpringContextUtils implements ApplicationContextAware { 15     public static ApplicationContext applicationContext; 16 
17  @Override 18     public void setApplicationContext(ApplicationContext applicationContext) 19             throws BeansException { 20         SpringContextUtils.applicationContext = applicationContext; 21  } 22 
23     public static Object getBean(String name) { 24         return applicationContext.getBean(name); 25  } 26 
27     public static <T> T getBean(String name, Class<T> requiredType) { 28         return applicationContext.getBean(name, requiredType); 29  } 30 
31     public static boolean containsBean(String name) { 32         return applicationContext.containsBean(name); 33  } 34 
35     public static boolean isSingleton(String name) { 36         return applicationContext.isSingleton(name); 37  } 38 
39     public static Class<? extends Object> getType(String name) { 40         return applicationContext.getType(name); 41  } 42 
43 }

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若是有報ApplicationContext空指針，則可能緣由是沒加載以前就往下走了，要在要 使用的類 前面加

@DependsOn("springContextUtils")