Write code to calculate sha hash for String
//package com.book2s; import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class Main { public static void main(String[] argv) { String string = "book2s.com"; System.out.println(sha1(string)); }//w w w. j ava2 s . co m static final byte[] HEX_CHAR_TABLE = { (byte) '0', (byte) '1', (byte) '2', (byte) '3', (byte) '4', (byte) '5', (byte) '6', (byte) '7', (byte) '8', (byte) '9', (byte) 'a', (byte) 'b', (byte) 'c', (byte) 'd', (byte) 'e', (byte) 'f' }; public static String sha1(String string) { MessageDigest md = null; try { md = MessageDigest.getInstance("SHA-1"); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } try { return getHexString(md.digest(string.getBytes())); } catch (UnsupportedEncodingException e) { return null; } } public static String getHexString(byte[] raw) throws UnsupportedEncodingException { byte[] hex = new byte[2 * raw.length]; int index = 0; for (byte b : raw) { int v = b & 0xFF; hex[index++] = HEX_CHAR_TABLE[v >>> 4]; hex[index++] = HEX_CHAR_TABLE[v & 0xF]; } return new String(hex, "ASCII"); } }