字符串转hex

 1     
 2     public static String toHex(String text) throws Exception {
 3 
 4         //将字符串转为GB2312数组
 5         byte[] arr = text.getBytes("GB2312");
 6 
 7         //将数组转为16进制字符串
 8         String hexStr = "";
 9         for (int i = 0; i < arr.length; i++) {
10             String str = byteToHex(arr[i]);
11             hexStr = hexStr + str;
12         }
13         return hexStr;
14     }
15 
16     public static String byteToHex(byte b) {
17         String hex = Integer.toHexString(b & 0xFF);
18         if (hex.length() < 2) {
19             hex = "0" + hex;
20         }
21         return hex;
22     }
23 
24 
25     public static String hexStrToStr(String hexStr) {
26         //能被16整除,肯定可以被2整除
27         byte[] array = new byte[hexStr.length() / 2];
28         try {
29             for (int i = 0; i < array.length; i++) {
30                 array[i] = (byte) (0xff & Integer.parseInt(hexStr.substring(i * 2, i * 2 + 2), 16));
31             }
32             hexStr = new String(array, "GB2312");
33         } catch (Exception e) {
34             e.printStackTrace();
35             return "";
36         }
37         return hexStr;
38     }

test

 String toStr = LkFeeUtils.hexStrToStr("BEA9413132333435");
        System.out.println(toStr);


        String hex = LkFeeUtils.toHex("京A12345");
        System.out.println(hex.toUpperCase());