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 }

如果有報ApplicationContext空指標，則可能原因是沒載入之前就往下走了，要在要 使用的類 前面加

@DependsOn("springContextUtils")