android md5加密和sha-1加密方法

网上的确有很多方法,但是正确的确实不好找.幸运的是自己找到了一个

public class MD5 {

	// MD5加密实例
	public static String getMD5(String str) throws NoSuchAlgorithmException {
		MessageDigest md5 = null;
		try {
			md5 = MessageDigest.getInstance("MD5");
		} catch (Exception e) {
			e.printStackTrace();
			return "";
		}
		char[] charArray = str.toCharArray();
		byte[] byteArray = new byte[charArray.length];
		for (int i = 0; i < charArray.length; i++) {
			byteArray[i] = (byte) charArray[i];
		}
		byte[] md5Bytes = md5.digest(byteArray);
		StringBuffer hexValue = new StringBuffer();
		for (int i = 0; i < md5Bytes.length; i++) {
			int val = ((int) md5Bytes[i]) & 0xff;
			if (val < 16) {
				hexValue.append("0");
			}
			hexValue.append(Integer.toHexString(val));
		}
		return hexValue.toString();
	}

	public static String byte2hex(byte[] b) {
		String hs = "";
		String stmp = "";
		for (int n = 0; n < b.length; n++) {
			stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
			if (stmp.length() == 1) {
				hs = hs + "0" + stmp;
			} else {
				hs = hs + stmp;
			}
		}
		return hs;
	}

	// SHA1 加密实例
	public static String encryptToSHA(String info) {
		byte[] digesta = null;
		try {
			// 得到一个SHA-1的消息摘要
			MessageDigest alga = MessageDigest.getInstance("SHA-1");
			// 添加要进行计算摘要的信息
			alga.update(info.getBytes());
			// 得到该摘要
			digesta = alga.digest();
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		// 将摘要转为字符串
		String rs = byte2hex(digesta);
		return rs;
	}
}

原帖地址: http://www.buhaoting.com/chengxu/yundongjianfei/shoushencao/45532.html
顺便给大家提供一个可以验证sha1加密是否正确的网站 http://www.bejson.com/ 这个网站还是很不错的,