MD5 . SHA1 加密

 

public static String str;

	public static String convertMD5(String plainText) {
		String result = "";
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");
			md.update(plainText.getBytes());
			byte b[] = md.digest();
			int i;
			StringBuffer buf = new StringBuffer("");
			for (int offset = 0; offset < b.length; offset++) {
				i = b[offset];
				if (i < 0)
					i += 256;
				if (i < 16)
					buf.append("0");
				buf.append(Integer.toHexString(i));
			}
			str = buf.toString();
			result = buf.toString();
			//System.out.println("result32: " + buf.toString());// 32位的加密
			//System.out.println("result16: " + buf.toString().substring(8, 24));// 16位的加密
		} catch (NoSuchAlgorithmException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();

		}
		return result;
	}

	public static String convertSHA1(String plainText) {
		String result = "";
		try {
			MessageDigest md = MessageDigest.getInstance("SHA-1");
			md.update(plainText.getBytes());
			byte b[] = md.digest();
			int i;
			StringBuffer buf = new StringBuffer("");
			for (int offset = 0; offset < b.length; offset++) {
				i = b[offset];
				if (i < 0)
					i += 256;
				if (i < 16)
					buf.append("0");
				buf.append(Integer.toHexString(i));
			}
			str = buf.toString();
			result = buf.toString();			//System.out.println("result32: " + buf.toString());// 32位的加密
			//System.out.println("result16: " + buf.toString().substring(8, 24));// 16位的加密
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();

		}
		return result;
	}

	public static void main(String agrs[]) {
		System.out.println(ToHash.convertMD5("http://www.juapk.com"));
		System.out.println(ToHash.convertSHA1("http://www.juapk.com"));
	}