propertiesloaderutils.java

一种快速开发的Java Web架构,doc里有详细的设计文档和开发文档。

/**
 *
 * 功能	 Coarse Function Description
 * 类名  PropertiesLoaderUtils
 *
 * ver       变更日        部门        变更者   变更内容
 * ──────────────────────────────────
 * V1.0    2006-11-14     国内事业部     陈志武     初版
 * V1.1    2006-11-14     国内事业部     陈志武     改定
 *
 */

package com.hisoft.cottonbusiness.core.util;

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

import org.apache.log4j.Logger;

/**
 * Class description in detail
 * 
 * 
 * @author 陈志武
 * @version Ver 1.0 2006-11-14 改订
 * @since Ver 1.0
 */

public class PropertiesLoaderUtils {

	private static final Logger log = Logger
			.getLogger(PropertiesLoaderUtils.class);

	public static Properties load(String[] cfg) {
		if (null == cfg || cfg.length == 0) {
			String msg = "please input configuration file!";
			log.error(msg);
			throw new RuntimeException(msg);
		}

		Properties props = new Properties();

		try {
			for (int i = 0; i < cfg.length; i++) {
				if (i == 0) {
					InputStream is = getContextClassLoader()
							.getResourceAsStream(cfg[i]);
					if (null != is) {
						props.load(is);
					}
				} else {
					InputStream is = getContextClassLoader()
							.getResourceAsStream(cfg[i]);
					Properties addedMap = new Properties();
					if (null != is) {
						addedMap.load(is);
					}
					props.putAll(addedMap);
				}
			}

			return props;
		} catch (IOException e) {
			String msg = "cfg reading error: " + e.getMessage();
			log.error(msg, e);
			throw new RuntimeException(msg, e);
		} catch (IllegalArgumentException e) {
			String msg = "cfg file format error: " + e.getMessage();
			log.error(msg, e);
			throw new RuntimeException(msg, e);
		}
	}

	public static Properties load(String cfg) {
		String[] file = { cfg };
		return load(file);

	}

	private static ClassLoader getContextClassLoader() {
		ClassLoader cl = Thread.currentThread().getContextClassLoader();
		if (null == cl) {
			cl = PropertiesLoaderUtils.class.getClassLoader();
		}

		return cl;
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		String file = "global.properties";

		Properties props = load(file);

		String[] sql = StringUtils.getStrings(props.getProperty("sql"));

	}

}