收集的Java中二进制与十六进制，byte与string的转换

1. 二进制byte[]转换成十六进制字符串string

public String byte2hex(byte[] b) // 二行制转字符串
    {
        String hs = "";
        String stmp = "";
        for (int n = 0; n < b.length; n++) {
            stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
            if (stmp.length() == 1)
                hs = hs + "0" + stmp;
            else
                hs = hs + stmp;
        }
        return hs;
    }

2. 十六进制字符串string转换成二进制byte[]

public 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;
    }

    public byte[] hex2byte(String hs) // 字符串转二行制
    {
        int m = 0, n = 0;
        int l = hs.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(hs.substring(i * 2, m), hs.substring(m, n));
        }
        return ret;

    }

3. String转换成byte[]

byte[] a=str.getBytes();

4. byte[]转换成String

str = new String(a);