解析多個ClassPath中的properties文件, 相同的屬性將會覆蓋之前的載入

1、PropertyUtils工具類

package com.iss.itreasury.syscore.utils;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.util.DefaultPropertiesPersister;
import org.springframework.util.PropertiesPersister;

/**
 * Properties Util函數.
 * 
 * @author leiyang3
 */
public class PropertyUtils {

	private static final String DEFAULT_ENCODING = "UTF-8";

	private static Logger logger = LoggerFactory.getLogger(PropertyUtils.class);

	private static PropertiesPersister propertiesPersister = new DefaultPropertiesPersister();

	/**
	 * 載入多個ClassPath中的properties文件, 相同的屬性將會覆蓋之前的載入.
	 * @see org.springframework.beans.factory.config.PropertyPlaceholderConfigurer
	 */
	public static Properties loadProperties(String... locations) throws IOException {
		Properties props = new Properties();

		for (String location : locations) {

			logger.debug("Loading properties file from classpath:" + location);

			InputStream is = null;
			try {
				Resource resource = new ClassPathResource(location);
				is = resource.getInputStream();
				propertiesPersister.load(props, new InputStreamReader(is, DEFAULT_ENCODING));
			} catch (IOException ex) {
				logger.info("Could not load properties from classpath:" + location + ": " + ex.getMessage());
			} finally {
				if (is != null) {
					is.close();
				}
			}
		}
		return props;
	}
}

2、使用方法

package com.iss.itreasury.test;

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

import com.iss.itreasury.syscore.utils.PropertyUtils;

public class TestProperty {
	private static Properties properties = null;
	private static final String[] filePath = {"sms2Config.properties","application.properties"};
	public static String getItem(String key){			
		if(properties == null){
			try {
				properties = PropertyUtils.loadProperties(filePath);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}			
		return properties.getProperty(key);
	}
	public static void main(String[] args) {
		String oPstation = TestProperty.getItem("op_station");
		String shortMessageFunctionId = TestProperty.getItem("shortMessageFunctionId");
		String ftpserverIp = TestProperty.getItem("ftpserver.ip");
		System.out.println(oPstation);
		System.out.println(shortMessageFunctionId);
		System.out.println(ftpserverIp);
	}
}

3、property文件（src根目錄下）

1、application.properties

#ftp server config

ftpserver.ip=10.80.0.228
ftpserver.username=yoyo
ftpserver.password=123456
ftpserver.port=

2、sms2Config.properties

#發送短信功能號
shortMessageFunctionId=520005
op_station=192.168.0.1
sslvpn=sslvpn
gl_channel_level=3653
gl_send_level=2
gl_iswap =0
gl_wapurl =