读取spring加载的properties的值

代码来自网络，测试有效
package com.cqjk.util;  
import java.lang.reflect.Method;
import java.util.Properties;

import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.PropertyResourceConfigurer;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.support.PropertiesLoaderSupport;
/**
 * 
 * @author Administrator
* @ClassName: SpringPropertyResourceReader 
* @Description: TODO(获取spring加载的资源文件的属性值) 
* @author A18ccms a18ccms_gmail_com 
* @date 2014-7-7 上午10:04:01
 */
public class SpringPropertyResourceReader {  
    private static ApplicationContext applicationContext=new   
    ClassPathXmlApplicationContext("com/cqjk/config/applicationContext.xml");  
    private static AbstractApplicationContext abstractContext =  
    (AbstractApplicationContext) applicationContext;  
    private static Properties properties=new Properties();  
    static{  
        try{  
            // get the names of BeanFactoryPostProcessor  
            String[] postProcessorNames = abstractContext  
                    .getBeanNamesForType(BeanFactoryPostProcessor.class,true,true);  
              
            for (String ppName : postProcessorNames) {  
                // get the specified BeanFactoryPostProcessor  
                BeanFactoryPostProcessor beanProcessor=  
                (BeanFactoryPostProcessor) abstractContext.getBean(ppName, BeanFactoryPostProcessor.class);  
                // check whether the beanFactoryPostProcessor is   
                // instance of the PropertyResourceConfigurer  
                // if it is yes then do the process otherwise continue  
                if(beanProcessor instanceof PropertyResourceConfigurer){  
                    PropertyResourceConfigurer propertyResourceConfigurer=  
                            (PropertyResourceConfigurer) beanProcessor;  
                      
                    // get the method mergeProperties   
                    // in class PropertiesLoaderSupport  
                    Method mergeProperties=PropertiesLoaderSupport.class.  
                        getDeclaredMethod("mergeProperties");  
                    // get the props  
                    mergeProperties.setAccessible(true);  
                    Properties props=(Properties) mergeProperties.  
                    invoke(propertyResourceConfigurer);  
                      
                    // get the method convertProperties   
                    // in class PropertyResourceConfigurer  
                    Method convertProperties=PropertyResourceConfigurer.class.  
                    getDeclaredMethod("convertProperties", Properties.class);  
                    // convert properties  
                    convertProperties.setAccessible(true);  
                    convertProperties.invoke(propertyResourceConfigurer, props);  
                      
                    properties.putAll(props);  
                }  
            }  
              
        }catch(Exception e){  
            throw new RuntimeException(e);  
        }  
    }  
      
    public static String getProperty(String propertyName){  
        return properties.getProperty(propertyName);  
    }  
}