Java 字符串,byte[],16进制的字符串互转

/**

* 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<b.length-1) hs=hs+":";}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 stringToUnicode(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00strRet += "\\" + strHex;}}return strRet;}/***unicode的String转换成String的字符串*/

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