读取属性文件

package cn.test;

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


public class AppConfig {
	
	private static AppConfig inst;

	public static AppConfig init() {

		if (inst == null) {
			inst = new AppConfig();

		}
		return inst;
	}
	
	public  static final String[] PROPERTIES_PATH = new String[] { "/jdbc.properties" };
	
	private Properties pros = new Properties();
	
	private Map<String,Object> ctx = new HashMap<String, Object>();
	
	private AppConfig() {
		
		try {
			for (int i = 0; i < PROPERTIES_PATH.length; i++) {
				
				String propFile = PROPERTIES_PATH[i];
				InputStream is =this.getClass().getResourceAsStream(propFile);
				
				pros.load(is);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}
	
	
	public static String getProperty(String key) {
		return inst.pros.getProperty(key);
	}
	
	public static String getProperty(String key,String defValue) {
		return inst.pros.getProperty(key, defValue);
	}
	
	public static void putAttr(String key,Object value) {
		inst.ctx.put(key, value);
	}
	
	public static Object getAttr(String key) {
		return inst.ctx.get(key);
	}
	
	public static void main(String[] args) {
		AppConfig.init();
		String eamil=AppConfig.getProperty("jdbc.drive");
		System.out.println(eamil);
	}
	
	
}