ApplicationContext ap = WebApplicationUtils.getWebApplicationContext(servletContextParam)

ApplicationContext ap = new ClassPathXmlApplicationContext("applicationContext.xml");

<bean id="springContextUtil" class="com.fubo.utils.spring.SpringContextUtil" lazy-init="false"/>

 1 package com.fubo.utils.spring;
 2 import javax.servlet.http.HttpServletRequest;
 3 import javax.servlet.http.HttpServletResponse;
 4  
 5 import org.springframework.context.ApplicationContext;
 6 import org.springframework.context.ApplicationContextAware;
 7 import org.springframework.context.support.ClassPathXmlApplicationContext;
 8 import org.springframework.web.context.support.WebApplicationContextUtils;
 9 /**
10  * 实现对spring context 的管理
11  * @author FB
12  * @2017年3月29日
13  * @上午9:07:27
14  * @
15  */
16 public class SpringContextUtils implements ApplicationContextAware {
17  
18     private static ApplicationContext applicationContext;
19  
20     /**
21      * 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量.
22      */
23     public void setApplicationContext(ApplicationContext applicationContext) {
24     　　SpringContextUtil.applicationContext = applicationContext; // NOSONAR
25     }
26  
27     /**
28      * 取得存储在静态变量中的ApplicationContext.
29      */
30     public static ApplicationContext getApplicationContext() {
31     　　checkApplicationContext();
32     　　return applicationContext;
33     }
34  
35     /**
36      * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
37      */
38     @SuppressWarnings("unchecked")
39     public static <T> T getBean(String name) {
40     　　checkApplicationContext();
41     　　return (T) applicationContext.getBean(name);
42     }
43  
44     /**
45      * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
46      */
47     @SuppressWarnings("unchecked")
48     public static <T> T getBean(Class<T> clazz) {
49     　　checkApplicationContext();
50     　　return (T) applicationContext.getBeansOfType(clazz);
51     }
52  
53     /**
54      * 清除applicationContext静态变量.
55      */
56     public static void cleanApplicationContext() {
57     　　applicationContext = null;
58     }
59  
60     private static void checkApplicationContext() {
61     　　if (applicationContext == null) {
62         throw new IllegalStateException(
63             "applicaitonContext未注入,请在applicationContext.xml中定义SpringContextUtil");
64     　　}
65     }
66     
67     
68     public static void setHttpRequestResponseUtil(HttpServletRequest request, HttpServletResponse response){
69         responseThreadLocal.set(response);
70         ApplicationContext ap = WebApplicationContextUtils.getWebApplicationContext(null);
71     }
72     public static HttpServletResponse getHttpResponse(){
73        return responseThreadLocal.get();
74     }
75  
76     public static void clean(){
77         responseThreadLocal.remove();
78     }
79  
80     private static final ThreadLocal<HttpServletResponse> responseThreadLocal = new ThreadLocal();
81     
82    }