1，編寫工具類

package com.cfwx.rox.web.business.essence.util;

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * 獲取spring的注入bean 工具類
 * @author JSW
 *
 */
public class SpringContextUtil implements ApplicationContextAware
{
    
    private static  ApplicationContext context = null;
    
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException
    {
        context = applicationContext;
    }
    
    /**
     * 獲取在*.xml檔案中有注入的bean
     * @param beanName
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String beanName){
        return (T) context.getBean(beanName);
    }

    /**
     * 獲取到的類的例項物件
     */
    private Map<String, Object> classInstances;
    
    /**
     * 獲取到的類的例項物件 指定spring註解的類物件
     */
    public Map<String, Object> getClassInstances() {
        if(this.classInstances == null){
            init();
        }
        return this.classInstances;
    }
    
    
    
    @SuppressWarnings("static-access")
    public void init(){
        if(this.context == null){
            return;
        }
        if(this.classInstances == null){
            this.classInstances = new HashMap<String,Object>();
        }
        
        Map<String, Object> beansWithAnnotationMap = this.context.getBeansWithAnnotation(org.springframework.stereotype.Service.class);
        
        Class<? extends Object> clazz = null;
        for(Map.Entry<String, Object> entry : beansWithAnnotationMap.entrySet()){
            clazz = entry.getValue().getClass();//獲取到例項物件的class資訊
            Class<? extends Object>  [] interfaces = clazz.getInterfaces();
            for(Class<? extends Object>  aInterface : interfaces){
                //介面例項名(只是將介面的首字母換成小寫)
                String aInterfaceSimpleName = getDefaultInstanceName(aInterface);
                classInstances.put(aInterfaceSimpleName, entry.getValue());
            }
        }
    }
    
    /**
     * 根據這個類來獲取預設的例項名（預設：將首字母換成小寫）
     * @param clazz  類資訊
     * @return 預設的例項名
     */
    public static String getDefaultInstanceName(Class<?> clazz) {
        if (clazz == null) {
            return null;
        }
        String className = clazz.getSimpleName();
        String firsrLowerChar = className.substring(0, 1).toLowerCase();
        className = firsrLowerChar + className.substring(1);
        return className;
    }
    
    
    

}
 

2， application.xml中注入

    <bean id="springContextUtil" class="com.cfwx.rox.web.business.essence.util.SpringContextUtil"></bean>
    

3， web.xml中配置監聽

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>