package com.vci.client.logon.client;


import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;

public class GetOrSetProperty {
	
	public static String readValue(String filePath, String key) {
		String value = null;
		if (key == null) {
			return null;
		} 
		Properties props = new Properties();
		try {
			InputStream ips = new BufferedInputStream(new FileInputStream(filePath));
			props.load(ips);
			value = props.getProperty(key);
		//	System.out.println(key + "=" + value);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			value = null;
		} catch (IOException e) {
			e.printStackTrace();
			value = null;
		} catch (Exception e) {
			e.printStackTrace();
			value = null;
		}
		return value;
	}
	
	public static String[] readValues(String filePath, String[] keys) {
		String[] values = null;
		if (keys == null) {
			return null;
		}
		Properties props = new Properties();
		try {
			InputStream ips = new BufferedInputStream(new FileInputStream(filePath));
			props.load(ips);
			int len = keys.length;
			values = new String[len];
			for (int i = 0; i < len; i++) {
				values[i] = props.getProperty(keys[i]);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			values = null;
		} catch (IOException e) {
			e.printStackTrace();
			values = null;
		} catch (Exception e) {
			e.printStackTrace();
			values = null;
		}
		return values;
	}
	
	public static void writeProperties(String filePath, Hashtable<String, String> ht) {
		Properties props = new Properties();
		try {
			Enumeration<String> enumration = ht.keys();
			OutputStream ops = new FileOutputStream(filePath);
			while (enumration.hasMoreElements()) {
				String key = enumration.nextElement();
				String value = ht.get(key);
				props.setProperty(key, value);
			}
			props.store(ops, "set");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public static void writeProperties(String filePath, String paraKey, String paraValue) {
		Properties props = new Properties();
		try {
			OutputStream ops = new FileOutputStream(filePath);
			props.setProperty(paraKey, paraValue);
			props.store(ops, "set");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}