package com.phoenix.core.db.Utils;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import java.io.IOException;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
 * Created by Lovell on 16/6/28.
 */
public class EncryptUtils {

    /**
 
     * 用MD5演算法進行加密
     * @param str 需要加密的字串
     * @return MD5加密後的結果
     */
public static String encodeMD5String(String str) {
        return encode(str, "MD5");
}

    /**
     * 用SHA演算法進行加密
     * @param str 需要加密的字串
     * @return SHA加密後的結果
     */
public static String encodeSHAString(String str) {
        return 
 
encode(str, "SHA");
}

    /**
     * 用base64演算法進行加密
     * @param str 需要加密的字串
     * @return base64加密後的結果
     */
public static String encodeBase64String(String str) {
        BASE64Encoder encoder =  new BASE64Encoder();
        return encoder.encode(str.getBytes());
}

    /**
     * 用base64演算法進行解密
 
     * @param str 需要解密的字串
     * @return base64解密後的結果
     * @throws IOException
     */
public static String decodeBase64String(String str) throws IOException {
        BASE64Decoder encoder =  new BASE64Decoder();
        return new String(encoder.decodeBuffer(str));
}

    private static String encode(String str, String method) {
        MessageDigest md = null;
String dstr = null;
        try {
            md = MessageDigest.getInstance(method);
md.update(str.getBytes());
dstr = new BigInteger(1, md.digest()).toString(16);
} catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
}
        return dstr;
}

    public static void main(String[] args) throws IOException {
        String user = "Lovell";
System.out.println("原始字串 " + user);
System.out.println("MD5加密 " + encodeMD5String(user));
System.out.println("SHA加密 " + encodeSHAString(user));
String base64Str = encodeBase64String(user);
System.out.println("Base64加密 " + base64Str);
System.out.println("Base64解密 " + decodeBase64String(base64Str));
}
}