package com.ruoyi.system.domain.task.utils;

import java.security.MessageDigest;

public class SHA1
{
	private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

	private static String getFormattedText(byte[] bytes)
	{
		int len = bytes.length;
		StringBuilder buf = new StringBuilder(len * 2);
		// 把密文转换成十六进制的字符串形式
		for (int j = 0; j < len; j++)
		{
			buf.append(HEX_DIGITS[(bytes[j] >> 4) & 0x0f]);
			buf.append(HEX_DIGITS[bytes[j] & 0x0f]);
		}
		return buf.toString();
	}

	public static String encode(String str)
	{
		if (str == null)
		{
			return null;
		}
		try
		{
			MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
			messageDigest.update(str.getBytes());
			return getFormattedText(messageDigest.digest());
		}
		catch (Exception e)
		{
			throw new RuntimeException(e);
		}
	}
}
