byte字節數組轉爲16進制字符串

package com.security.utils;

/**

• @author Administrator

• byte字節數組轉爲16進制字符串 */ public class BytesToHexString {

  public static String bytesToHexString(byte[]bytes){ String str=""; for (int i = 0; i < bytes.length; i++) { String hex = Integer.toHexString(bytes[i] & 0xFF); if (hex.length()<2) { hex = hex + "0"; } str = str + hex; } return str; } @SuppressWarnings("unused") private static String bytesToHexString2(byte[] bytes) { String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" }; StringBuffer sb = new StringBuffer(); for (int i = 0; i < bytes.length; i++) { int temp = bytes[i]; if (temp < 0) { temp += 256; } //高位 int h = temp % 16; //低位 int l = temp / 16; sb.append(hexDigits[h] + hexDigits[l]); } return sb.toString(); } public static void main(String[] args) { try { System.out.println(bytesToHexString("123456".getBytes("UTf-8"))); System.out.println(bytesToHexString2("123456".getBytes("UTF-8"))); } catch (Exception e) { e.printStackTrace(); } } }