通過實現ApplicationContextAware接口獲取bean

KILLKISS 2012-07-24

展開全文

場景：

在代碼中需要動態獲取其它bean

實例代碼：

01package org.company.xxx;
02 
03import org.springframework.beans.BeansException;
04import org.springframework.context.ApplicationContext;
05import org.springframework.context.ApplicationContextAware;
06 
07/**
08 * 獲取spring容器，以訪問容器中定義的其他bean
09 */
10public class SpringContextUtil implements ApplicationContextAware {
11 
12    // Spring應用上下文環境
13    private static ApplicationContext applicationContext;
14 
15    /**
16     * 實現ApplicationContextAware接口的回調方法，設置上下文環境
17     */
18    public void setApplicationContext(ApplicationContext applicationContext)
19            throws BeansException {
20        SpringContextUtil.applicationContext = applicationContext;
21    }
22 
23    public static ApplicationContext getApplicationContext() {
24        return applicationContext;
25    }
26 
27    /**
28     * 獲取對象 這里重寫了bean方法，起主要作用
29     * 
30     * @param name
31     * <a  class="referer" target="_blank">@return</a>  Object 一個以所給名字注冊的bean的實例
32     * @throws BeansException
33     */
34    public static Object getBean(String beanId) throws BeansException {
35        return applicationContext.getBean(beanId);
36    }
37}