在调试的时候,如果要显示byte的值是否与预期一致,一般转换为16进制的字符串,或者使用base64转换后,然后显示出来。
- /**
- * 字符串转换成十六进制字符串
- */
- public static String str2HexStr(String str) {
- char[] chars = "0123456789ABCDEF".toCharArray();
- StringBuilder sb = new StringBuilder("");
- byte[] bs = str.getBytes();
- int bit;
- for (int i = 0; i < bs.length; i++) {
- bit = (bs[i] & 0x0f0) >> 4;
- sb.append(chars[bit]);
- bit = bs[i] & 0x0f;
- sb.append(chars[bit]);
- }
- return sb.toString();
- }
- /**
- *
- * 十六进制转换字符串
- */
- public static String hexStr2Str(String hexStr) {
- String str = "0123456789ABCDEF";
- char[] hexs = hexStr.toCharArray();
- byte[] bytes = new byte[hexStr.length() / 2];
- int n;
- for (int i = 0; i < bytes.length; i++) {
- n = str.indexOf(hexs[2 * i]) * 16;
- n += str.indexOf(hexs[2 * i + 1]);
- bytes[i] = (byte) (n & 0xff);
- }
- return new String(bytes);
- }
- /**
- * bytes转换成十六进制字符串
- */
- public static String byte2HexStr(byte[] b) {
- String hs = "";
- String stmp = "";
- for (int n = 0; n < b.length; n++) {
- stmp = (Integer.toHexString(b[n] & 0XFF));
- if (stmp.length() == 1)
- hs = hs + "0" + stmp;
- else
- hs = hs + stmp;
- // if (n
- }
- return hs.toUpperCase();
- }
- private static byte uniteBytes(String src0, String src1) {
- byte b0 = Byte.decode("0x" + src0).byteValue();
- b0 = (byte) (b0 << 4);
- byte b1 = Byte.decode("0x" + src1).byteValue();
- byte ret = (byte) (b0 | b1);
- return ret;
- }
- /**
- * bytes转换成十六进制字符串
- */
- public static byte[] hexStr2Bytes(String src) {
- int m = 0, n = 0;
- int l = src.length() / 2;
- System.out.println(l);
- byte[] ret = new byte[l];
- for (int i = 0; i < l; i++) {
- m = i * 2 + 1;
- n = m + 1;
- ret[i] = uniteBytes(src.substring(i * 2, m), src.substring(m, n));
- }
- return ret;
- }
- /**
- *String的字符串转换成unicode的String
- */
- public static String str2Unicode(String strText) throws Exception {
- char c;
- String strRet = "";
- int intAsc;
- String strHex;
- for (int i = 0; i < strText.length(); i++) {
- c = strText.charAt(i);
- intAsc = (int) c;
- strHex = Integer.toHexString(intAsc);
- if (intAsc > 128) {
- strRet += "//u" + strHex;
- } else {
- // 低位在前面补00
- strRet += "//u00" + strHex;
- }
- }
- return strRet;
- }
- /**
- *unicode的String转换成String的字符串
- */
- public static String unicode2Str(String hex) {
- int t = hex.length() / 6;
- StringBuilder str = new StringBuilder();
- for (int i = 0; i < t; i++) {
- String s = hex.substring(i * 6, (i + 1) * 6);
- // 高位需要补上00再转
- String s1 = s.substring(2, 4) + "00";
- // 低位直接转
- String s2 = s.substring(4);
- // 将16进制的string转为int
- int n = Integer.valueOf(s1, 16) + Integer.valueOf(s2, 16);
- // 将int转换为字符
- char[] chars = Character.toChars(n);
- str.append(new String(chars));
- }
- return str.toString();
- }