spring 中读取properties 文件

backup.host = 192.168.1.6
backup.user = root
backup.pwd =pwd

package com.ly.jxc.util;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;


import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
/**
 * 配置文件读取类
 * @author yq
 * 2014-09-29
 */
public class Configs extends PropertyPlaceholderConfigurer {  

private static Map<String, Object> ctxPropertiesMap;  


protected static void load(){  
    Resource resource = new ClassPathResource("/config.properties");
    Properties props;
    try {
        props = PropertiesLoaderUtils.loadProperties(resource);

    ctxPropertiesMap = new HashMap<String, Object>();  
    for (Object key : props.keySet()) {  
        String keyStr = key.toString();  
        String value = props.getProperty(keyStr);  
        ctxPropertiesMap.put(keyStr, value);  
    }  
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}  
/**
 * 返回int,带默认值
 * @param name
 * @return
 */
public static int getIntValue(String name,int defaultValue) { 
    if(ctxPropertiesMap ==null ||ctxPropertiesMap.isEmpty())
        load();
    if(ctxPropertiesMap.get(name)==null)
    return defaultValue;
    return Integer.parseInt((String)ctxPropertiesMap.get(name));  
}  
/**
 * 返回int
 * @param name
 * @return
 */
public static int getIntValue(String name) {  
    if(ctxPropertiesMap ==null ||ctxPropertiesMap.isEmpty())
        load();
    if(ctxPropertiesMap.get(name)==null)
    return 0;
    return Integer.parseInt((String)ctxPropertiesMap.get(name));  
}  

/**
 * 返回string
 * @param name
 * @return
 */
public static String getValue(String name) {  
    if(ctxPropertiesMap ==null || ctxPropertiesMap.isEmpty())
        load();
    return (String)ctxPropertiesMap.get(name);  
}  
}