【笔记】读取properties文件

package com.bshinfo.el.userInfo.util;
 
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
 
public class SystemConfigUtil {
 
	private static SystemConfigUtil systemConfigUtil = null;
 
	private static Map<String, String> proMap = new HashMap<String, String>();
 
	private SystemConfigUtil() {
 
		Properties pro = new Properties();
 
		try {
			pro.load(new InputStreamReader(SystemConfigUtil.class.getClassLoader().getResourceAsStream("printgz.properties"), "UTF-8"));//默认根目录下
 
			Enumeration e = pro.propertyNames();
 
			while (e.hasMoreElements()) {
 
				String key = (String) e.nextElement();
 
				String value = (String) pro.get(key);
 
				proMap.put(key, value);
 
			}
 
		} catch (IOException e) {
 
			e.printStackTrace();
 
		} 
 
	}
 
	public static SystemConfigUtil getInstance() {
 
		if (systemConfigUtil == null) {
 
			systemConfigUtil = new SystemConfigUtil();
 
		}
 
		return null;
 
	}
 
	public static Map<String, String> getProMap() {
 
		return proMap;
 
	}
 
	public static void main(String[] args) {
 
		// 写一个main方法，来验证一下
 
		SystemConfigUtil systemConfigUtil = SystemConfigUtil.getInstance();
 
		SystemConfigUtil systemConfigUtil2 = SystemConfigUtil.getInstance();
 
		System.out.println(systemConfigUtil == systemConfigUtil2);
 
		Map m1 = systemConfigUtil.getProMap();
 
		Map m2 = systemConfigUtil2.getProMap();
 
		System.out.println(m1 == m2);
 
		System.out.println(m1.get("test"));
		System.out.println(m1.get("燃油值班员"));
 
	}
 
}