/**
 * The MIT License (MIT) * Copyright (c) 2020 铭软科技(mingsoft.net)

 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package net.mingsoft.base.util;

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

/**
 * 读取Properties综合类,默认绑定到classpath下的config.properties文件。
 */
public class PropertiesUtil {

	/**
	 * 读取资源文件键值
	 * @param properties  属性文件包路径 如：net/mingsoft/resources/a.properties
	 * @param key 键
	 * @return
	 * @throws IOException
	 */
	public static String get(String properties, String key) throws IOException {
		InputStream in = PropertiesUtil.class.getClassLoader().getResourceAsStream(properties);
		Properties props = new Properties();
		props.load(in);
		String value = props.getProperty(key);
		// 关闭资源
		in.close();
		return value;
	}

	/**
	 * 读取资源文件所有信息
	 * @param properties  属性文件包路径 如：net/mingsoft/resources/a.properties
	 * @return
	 * @throws FileNotFoundException
	 * @throws IOException
	 */
	public static Map<String, String> getMap(String properties) throws FileNotFoundException, IOException {
		// 保存所有的键值
		Map<String, String> map = new HashMap<String, String>();
		InputStream in = PropertiesUtil.class.getClassLoader().getResourceAsStream(properties);
		Properties props = new Properties();
		props.load(in);
		Enumeration en = props.propertyNames();
		while (en.hasMoreElements()) {
			String key = (String) en.nextElement();
			String Property = props.getProperty(key);
			map.put(key, Property);
		}
		in.close();
		return map;
	}

	/**
	 * 设置属性值
	 * 
	 * @param properties
	 *            属性文件包路径 如：net/mingsoft/resources/a.properties
	 * @param key
	 *            键
	 * @param value
	 *            值
	 * @throws IOException
	 */
	public void setValue(String properties, String key, String value) throws IOException {
		Properties prop = new Properties();
		InputStream fis = new FileInputStream(PropertiesUtil.class.getClassLoader().getResource(properties).getPath());
		// 从输入流中读取属性列表（键和元素对）
		prop.load(fis);
		// 调用 Hashtable 的方法 put。使用 getProperty 方法提供并行性。
		// 强制要求为属性的键和值使用字符串。返回值是 Hashtable 调用 put 的结果。
		OutputStream fos = new FileOutputStream(
				PropertiesUtil.class.getClassLoader().getResource(properties).getPath());
		prop.setProperty(key, value);
		// 以适合使用 load 方法加载到 Properties 表中的格式，
		// 将此 Properties 表中的属性列表（键和元素对）写入输出流
		prop.store(fos, "last update");
		// 关闭文件
		fis.close();
		fos.close();
	}

}