import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.net.URL;
import java.net.HttpURLConnection;
import java.io.PRintWriter;
import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * Created by IntelliJ IDEA.
 * User: zhengzhg
 * Mail: snake_country@sina.com
 * Date: 2004-10-13
 * Time: 15:30:28
 * To change this template use File Settings File Templates.
 * 常用工具包。包括生成各種密碼隨機(jī)串，加密解密，編碼解碼，執(zhí)行url等
 */

public class CryptTool {
    /**
     * 生成密碼.
     * @param count 密碼位數(shù)
     * @param letters 是否包含字符
     * @param numbers 是否包含數(shù)字
     * @return String passWord
     */
    public static String getPassword(int count, boolean letters, boolean numbers) {
        return org.apache.commons.lang.RandomStringUtils.random(count, letters, numbers);
    }

    /**
     * 生成字符數(shù)字混合的密碼.
     * @param count 密碼位數(shù)
     * @return String password
     */
    private static String getPassword(int count) {
        return getPassword(count, true, true);
    }

    /**
     * 生成純數(shù)字密碼.
     * @param count 密碼位數(shù)
     * @return String password
     */
    public static String getPasswordOfNumber(int count) {
        return getPassword(count, false, true);
    }

    /**
     * 生成純字符密碼.
     * @param count 密碼位數(shù)
     * @return String password
     */
    public static String getPasswordOfCharacter(int count) {
        return getPassword(count, true, false);
    }

    /**
     * 生成3DES密鑰.
     * @param key_byte seed key
     * @throws Exception
     * @return javax.crypto.SecretKey Generated DES key
     */
    public static javax.crypto.SecretKey genDESKey(byte[] key_byte) throws Exception {
        SecretKey k = new SecretKeySpec(key_byte, "DESede");