|
@@ -0,0 +1,311 @@
|
|
|
+package com.gyee.redisread.util;
|
|
|
+
|
|
|
+public class ByteUtil {
|
|
|
+ /**
|
|
|
+ * 转换short为byte
|
|
|
+ *
|
|
|
+ * @param b
|
|
|
+ * @param s
|
|
|
+ * 需要转换的short
|
|
|
+ * @param index
|
|
|
+ */
|
|
|
+ public static void putShort(byte b[], short s, int index) {
|
|
|
+ b[index + 1] = (byte) (s >> 8);
|
|
|
+ b[index + 0] = (byte) (s >> 0);
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 通过byte数组取到short
|
|
|
+ *
|
|
|
+ * @param b
|
|
|
+ * @param index
|
|
|
+ * 第几位开始取
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+ public static short getShort(byte[] b, int index) {
|
|
|
+ return (short) (((b[index + 1] << 8) | b[index + 0] & 0xff));
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 转换int为byte数组
|
|
|
+ *
|
|
|
+ * @param bb
|
|
|
+ * @param x
|
|
|
+ * @param index
|
|
|
+ */
|
|
|
+ public static void putInt(byte[] bb, int x, int index) {
|
|
|
+ bb[index + 3] = (byte) (x >> 24);
|
|
|
+ bb[index + 2] = (byte) (x >> 16);
|
|
|
+ bb[index + 1] = (byte) (x >> 8);
|
|
|
+ bb[index + 0] = (byte) (x >> 0);
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 通过byte数组取到int
|
|
|
+ *
|
|
|
+ * @param bb
|
|
|
+ * @param index
|
|
|
+ * 第几位开始
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+ public static int getInt(byte[] bb, int index) {
|
|
|
+ return (int) ((((bb[index + 3] & 0xff) << 24)
|
|
|
+ | ((bb[index + 2] & 0xff) << 16)
|
|
|
+ | ((bb[index + 1] & 0xff) << 8) | ((bb[index + 0] & 0xff) << 0)));
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 转换long型为byte数组
|
|
|
+ *
|
|
|
+ * @param b
|
|
|
+ * @param x
|
|
|
+ * @param index
|
|
|
+ */
|
|
|
+ public static byte[] putLong(byte[] b, long x, int index) {
|
|
|
+ byte[] bb = new byte[8];
|
|
|
+ for (int i = 0; i < 8; i++) {
|
|
|
+ int offset = 64 - (i + 1) * 8;
|
|
|
+ bb[i] = (byte) ((x >> offset) & 0xff);
|
|
|
+ }
|
|
|
+ return bb;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 通过byte数组取到long
|
|
|
+ *
|
|
|
+ * @param bb
|
|
|
+ * @param index
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+ public static long getLong(byte[] bb, int index) {
|
|
|
+ return ((((long) bb[index + 7] & 0xff) << 56)
|
|
|
+ | (((long) bb[index + 6] & 0xff) << 48)
|
|
|
+ | (((long) bb[index + 5] & 0xff) << 40)
|
|
|
+ | (((long) bb[index + 4] & 0xff) << 32)
|
|
|
+ | (((long) bb[index + 3] & 0xff) << 24)
|
|
|
+ | (((long) bb[index + 2] & 0xff) << 16)
|
|
|
+ | (((long) bb[index + 1] & 0xff) << 8) | (((long) bb[index + 0] & 0xff) << 0));
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 通过byte数组取到long
|
|
|
+ *
|
|
|
+ * @param bb
|
|
|
+ * @param index
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+ public static long getLong2(byte[] bb, int index) {
|
|
|
+ return ((((long) bb[index + 0] & 0xff) << 56)
|
|
|
+ | (((long) bb[index + 1] & 0xff) << 48)
|
|
|
+ | (((long) bb[index + 2] & 0xff) << 40)
|
|
|
+ | (((long) bb[index + 3] & 0xff) << 32)
|
|
|
+ | (((long) bb[index + 4] & 0xff) << 24)
|
|
|
+ | (((long) bb[index + 5] & 0xff) << 16)
|
|
|
+ | (((long) bb[index + 6] & 0xff) << 8)
|
|
|
+ | (((long) bb[index + 7] & 0xff) << 0) );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 字符到字节转换
|
|
|
+ *
|
|
|
+ * @param ch
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+ public static void putChar(byte[] bb, char ch, int index) {
|
|
|
+ int temp = (int) ch;
|
|
|
+ // byte[] b = new byte[2];
|
|
|
+ for (int i = 0; i < 2; i ++ ) {
|
|
|
+ bb[index + i] = new Integer(temp & 0xff).byteValue(); // 将最高位保存在最低位
|
|
|
+ temp = temp >> 8; // 向右移8位
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 字节到字符转换
|
|
|
+ *
|
|
|
+ * @param b
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+ public static char getChar(byte[] b, int index) {
|
|
|
+ int s = 0;
|
|
|
+ if (b[index + 1] > 0)
|
|
|
+ s += b[index + 1];
|
|
|
+ else
|
|
|
+ s += 256 + b[index + 0];
|
|
|
+ s *= 256;
|
|
|
+ if (b[index + 0] > 0)
|
|
|
+ s += b[index + 1];
|
|
|
+ else
|
|
|
+ s += 256 + b[index + 0];
|
|
|
+ char ch = (char) s;
|
|
|
+ return ch;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * float转换byte
|
|
|
+ *
|
|
|
+ * @param bb
|
|
|
+ * @param x
|
|
|
+ * @param index
|
|
|
+ */
|
|
|
+ public static void putFloat(byte[] bb, float x, int index) {
|
|
|
+ // byte[] b = new byte[4];
|
|
|
+ int l = Float.floatToIntBits(x);
|
|
|
+ for (int i = 0; i < 4; i++) {
|
|
|
+ bb[index + i] = new Integer(l).byteValue();
|
|
|
+ l = l >> 8;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 通过byte数组取得float
|
|
|
+ *
|
|
|
+ * @param b
|
|
|
+ * @param index
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+ public static float getFloat(byte[] b, int index) {
|
|
|
+ int l;
|
|
|
+ l = b[index + 0];
|
|
|
+ l &= 0xff;
|
|
|
+ l |= ((long) b[index + 1] << 8);
|
|
|
+ l &= 0xffff;
|
|
|
+ l |= ((long) b[index + 2] << 16);
|
|
|
+ l &= 0xffffff;
|
|
|
+ l |= ((long) b[index + 3] << 24);
|
|
|
+ return Float.intBitsToFloat(l);
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * double转换byte
|
|
|
+ *
|
|
|
+ * @param bb
|
|
|
+ * @param x
|
|
|
+ * @param index
|
|
|
+ */
|
|
|
+ public static byte[] putDouble(byte[] bb, double x, int index) {
|
|
|
+ byte[] b = new byte[8];
|
|
|
+ long l = Double.doubleToLongBits(x);
|
|
|
+ for (int i = 0; i < 8; i++) {
|
|
|
+ b[index + i] = new Long(l).byteValue();
|
|
|
+ l = l >> 8;
|
|
|
+ }
|
|
|
+ return b;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 通过byte数组取得double
|
|
|
+ *
|
|
|
+ * @param b
|
|
|
+ * @param index
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+ public static double getDouble(byte[] b, int index) {
|
|
|
+ long l;
|
|
|
+ l = b[0];
|
|
|
+ l &= 0xff;
|
|
|
+ l |= ((long) b[1] << 8);
|
|
|
+ l &= 0xffff;
|
|
|
+ l |= ((long) b[2] << 16);
|
|
|
+ l &= 0xffffff;
|
|
|
+ l |= ((long) b[3] << 24);
|
|
|
+ l &= 0xffffffffl;
|
|
|
+ l |= ((long) b[4] << 32);
|
|
|
+ l &= 0xffffffffffl;
|
|
|
+ l |= ((long) b[5] << 40);
|
|
|
+ l &= 0xffffffffffffl;
|
|
|
+ l |= ((long) b[6] << 48);
|
|
|
+ l &= 0xffffffffffffffl;
|
|
|
+ l |= ((long) b[7] << 56);
|
|
|
+ return Double.longBitsToDouble(l);
|
|
|
+ }
|
|
|
+
|
|
|
+ public static void putHexString(byte[] bb, String s, int index){
|
|
|
+ for (int i = 0; i < s.length(); i+=2) {
|
|
|
+ byte c= (byte)( charToByte(s.charAt(i))<<4 | charToByte(s.charAt(i+1)));
|
|
|
+ bb[index+(i>>1)] = c;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ private static byte charToByte(char c) {
|
|
|
+ return (byte) "0123456789ABCDEF".indexOf(c);
|
|
|
+ }
|
|
|
+
|
|
|
+ public static String getHexString(byte[] b, int index, int count){
|
|
|
+ StringBuilder stringBuilder = new StringBuilder("");
|
|
|
+ if (b == null || index < 0 || b.length < index + count ) {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+ for (int i = index; i < count + index; i++) {
|
|
|
+ int v = b[i] & 0xFF;
|
|
|
+ String hv = Integer.toHexString(v);
|
|
|
+ if (hv.length() < 2) {
|
|
|
+ stringBuilder.append(0);
|
|
|
+ }
|
|
|
+ stringBuilder.append(hv);
|
|
|
+ }
|
|
|
+ return stringBuilder.toString();
|
|
|
+ }
|
|
|
+
|
|
|
+ public static String getBinaryString(int d,int length){
|
|
|
+ StringBuilder stringBuilder = new StringBuilder("");
|
|
|
+ String hv = Integer.toBinaryString(d);
|
|
|
+ for (int j = 0; j < length - hv.length(); j++) {
|
|
|
+ stringBuilder.append(0);
|
|
|
+ }
|
|
|
+ stringBuilder.append(hv);
|
|
|
+ return stringBuilder.toString();
|
|
|
+ }
|
|
|
+
|
|
|
+ public static String getBinaryReverseString(int d,int length){
|
|
|
+ StringBuilder stringBuilder = new StringBuilder("");
|
|
|
+ String hv = Integer.toBinaryString(d);
|
|
|
+ for (int j = 0; j < length - hv.length(); j++) {
|
|
|
+ stringBuilder.append(0);
|
|
|
+ }
|
|
|
+ stringBuilder.append(hv);
|
|
|
+ stringBuilder.reverse();
|
|
|
+
|
|
|
+ return stringBuilder.toString();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ //网络字节逆序
|
|
|
+ public static byte[] ReversEndian(byte b[],int count, boolean big)
|
|
|
+ {
|
|
|
+ byte by;
|
|
|
+ byte data[] = new byte[count];
|
|
|
+ for(int i=0;i<count;i++)
|
|
|
+ {
|
|
|
+ data[i] = b[i];
|
|
|
+ }
|
|
|
+ if(big==false)
|
|
|
+ {
|
|
|
+ for(int i=0;i<count;i++)
|
|
|
+ {
|
|
|
+ by = b[i];
|
|
|
+ data[count-i-1] = by;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return data;
|
|
|
+ }
|
|
|
+
|
|
|
+ public static short htons(short s){
|
|
|
+ short rslt = 0;
|
|
|
+ byte [] bs1 = new byte[2];
|
|
|
+ ByteUtil.putShort(bs1, s, 0);
|
|
|
+ byte[] bs2 = ReversEndian(bs1, 2, false);
|
|
|
+ rslt = ByteUtil.getShort(bs2, 0);
|
|
|
+ return rslt;
|
|
|
+ }
|
|
|
+
|
|
|
+ public static int htonl(int d){
|
|
|
+ int rslt = 0;
|
|
|
+ byte [] bs1 = new byte[4];
|
|
|
+ ByteUtil.putInt(bs1, d, 0);
|
|
|
+ byte[] bs2 = ReversEndian(bs1, 4, false);
|
|
|
+ rslt = ByteUtil.getInt(bs2, 0);
|
|
|
+ return rslt;
|
|
|
+ }
|
|
|
+
|
|
|
+}
|