package util.core;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

public class Utils {

	public static String key = "47944980";

	public static String decrypt(String value, String basePath) {
		String path = "/WEB-INF/jsp/js/des.js";  
		try {
			String content = readFile(new File(basePath + path));
			ScriptEngineManager sem = new ScriptEngineManager();
			ScriptEngine se = sem.getEngineByName("javascript");
			se.eval(content + " DES.init( \"" + key + "\" , \"" + value
					+ "\" ) ;");
			String pwd = (String) se
					.eval("decodeURI(DES.Encrypt(\"Decrypt\"))");
			return pwd;
		} catch (Exception e) {
			e.printStackTrace();
		}
		return "";
	}

	public static String encrypt(String value, String basePath) {
		String path = "/WEB-INF/jsp/js/des.js";
		try {
			String content = readFile(new File(basePath + path));
			ScriptEngineManager sem = new ScriptEngineManager();
			ScriptEngine se = sem.getEngineByName("javascript");
			se.eval(content + " DES.init( \"" + key + "\" , encodeURI( \""
					+ value + "\" ) ) ; ");
			String pwd = (String) se.eval("DES.Encrypt()");
			return pwd;
		} catch (Exception e) {
			e.printStackTrace();
		}
		return "";
	}

	public static void main(String[] args) {
		String basePath = "E:\\soft\\apache-tomcat-6.0.18\\webapps\\rh\\";
		String e = encrypt("中文", basePath) ;
		System.out.println("pwd=" + e );
		System.out.println("pwd=" + decrypt( e , basePath)); 
	}

	/**
	 * 读取文件内容
	 */
	public static String readFile(File file) {
		String content = "";
		InputStream is = null;
		try {
			is = new FileInputStream(file);
			BufferedReader reader = new BufferedReader(new InputStreamReader(
					is, "UTF-8"));
			String line = null;
			while ((line = reader.readLine()) != null) {
				String str = line.trim() ;
				content += str + "\n" ; 
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				is.close();
			} catch (Exception e) {
			}
		}
		return content;
	}
}