package util;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Properties;

public class UpdateScanInterval {

	/**
	 * 指定property文件
	 */
	//生成项目中的路径
	private String path;
	private File staticfile;
	
	public UpdateScanInterval() {
		path = this.getClass().getResource("/").getPath().substring(1, this.getClass().getResource("/").getPath().length()) + "util/scanInterval.properties";
		try {
			path = java.net.URLDecoder.decode(path,"utf-8");  //对路径解码，防止特殊符号产生的乱码
		} catch (UnsupportedEncodingException e1) {
			e1.printStackTrace();
		}
		staticfile = new File(path);
}

	/**
	 * 根据Key 读取Value
	 * 
	 * @param key
	 * @return
	 */
	public String readData(String key) {
		Properties props = new Properties();
		try {
			InputStream in = new BufferedInputStream(new FileInputStream(path));
			props.load(in);
			in.close();
			String value = props.getProperty(key);
			return value;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 修改或添加键值对 如果key存在，修改 反之，添加。
	 * 
	 * @param key
	 * @param value
	 */
	public void writeData(String key, String value) {
		Properties prop = new Properties();
		try {
			File file = new File(staticfile.getAbsolutePath());
			if (!file.exists())
				file.createNewFile();
			InputStream fis = new FileInputStream(file);
			prop.load(fis);
			fis.close();// 一定要在修改值之前关闭fis
			OutputStream fos = new FileOutputStream(staticfile.getAbsolutePath());
			prop.setProperty(key, value);
			prop.store(fos, "\u8BBE\u7F6E\u626B\u63CF\u95F4\u9694\u65F6\u95F4");
			fos.close();
		} catch (IOException e) {
			System.err.println("Visit " + path + " for updating "
					+ value + " value error");
		}
	}

	public static void main(String[] args) {
		try {
			String p = "E:/Tomcat%206.0/webapps/";
			p = java.net.URLDecoder.decode(p,"utf-8");
			System.out.println("1>>>>"+p);
			p = java.net.URLDecoder.decode(p,"utf-8");
			System.out.println("2>>>>"+p);
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
//		// TODO Auto-generated method stub
//		UpdateScanInterval test = new UpdateScanInterval();
//		test.writeData("scanInterval", "1000*60*10");
//		String scanInterval = test.readData("scanInterval");
//		System.out.println("The name of the person is:" + scanInterval);
	}
}