在普通类中获取Spring管理的bean

  1、在项目中添加下面的类:

  

import org.springframework.context.ApplicationContext;  
import org.springframework.context.ApplicationContextAware;  
/** 
 * 以静态变量保存Spring ApplicationContext, 可在任何代码任何地方任何时候中取出ApplicaitonContext. 
 *  
 */  
public class SpringContextHolder implements ApplicationContextAware {  
private static ApplicationContext applicationContext;  
  
/** 
* 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量. 
*/  
public void setApplicationContext(ApplicationContext applicationContext) {  
SpringContextHolder.applicationContext = applicationContext; // NOSONAR  
}  
  
/** 
* 取得存储在静态变量中的ApplicationContext. 
*/  
public static ApplicationContext getApplicationContext() {  
checkApplicationContext();  
return applicationContext;  
}  
  
/** 
* 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型. 
*/  
@SuppressWarnings("unchecked")  
public static <T> T getBean(String name) {  
checkApplicationContext();  
return (T) applicationContext.getBean(name);  
}  
  
/** 
* 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型. 
*/  
@SuppressWarnings("unchecked")  
public static <T> T getBean(Class<T> clazz) {  
checkApplicationContext();  
return (T) applicationContext.getBeansOfType(clazz);  
}  
  
/** 
* 清除applicationContext静态变量. 
*/  
public static void cleanApplicationContext() {  
applicationContext = null;  
}  
  
private static void checkApplicationContext() {  
if (applicationContext == null) {  
throw new IllegalStateException("applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder");  
}  
}  
}  

  2、在spring配置文件中加入:

<bean class="com.xxxxx.SpringContextHolder" lazy-init="false" />  

  3、使用方法:

  SpringContextHolder.getBean('xxxx')的静态方法得到spring bean对象 

posted @ 2014-08-12 08:39 长夏已尽 阅读(...) 评论(...) 编辑 收藏