package com.fzzy.api.utils;
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import java.math.BigInteger;
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public class BytesUtil {
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/**
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* bytes输出十进制
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*
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* @param bytes
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* @return
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*/
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public static Integer bytesToInt(byte[] bytes) {
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String str = "";
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int i = 0;
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boolean flag = true && bytes.length > 0;
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while (flag) {
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Byte b = bytes[i];
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i++;
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Integer bi = Byte.toUnsignedInt(b);
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str += toHexString(bi);
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if (i >= bytes.length || str.endsWith("EEEE"))
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flag = false;
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}
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return Integer.parseInt(str, 16);
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}
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/**
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* bytes输出十六进制字符串
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*
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* @param bytes
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* @return
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*/
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public static String bytesToString(byte[] bytes) {
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String str = "";
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int i = 0;
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boolean flag = true && bytes.length > 0;
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while (flag) {
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Byte b = bytes[i];
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i++;
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Integer bi = Byte.toUnsignedInt(b);
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str += toHexString(bi);
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if (i >= bytes.length)
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flag = false;
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}
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return str;
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}
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/**
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* 十六进制转字节
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*
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* @param hex
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* @return
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*/
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public static byte hexToByte(Integer hex) {
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return hex.byteValue();
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}
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/**
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* short转2字节 已调整高低位
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*
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* @param number
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* @return
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*/
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public static byte[] shortToByte(short number) {
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int temp = number;
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byte[] b = new byte[2];
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for (int i = 0; i < b.length; i++) {
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b[i] = new Integer(temp & 0xff).byteValue();// 将最低位保存在最低位
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temp = temp >> 8; // 向右移8位
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}
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return b;
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}
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/**
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* 二进制子串转16进制子串
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*
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* @param bin
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* @return
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*/
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public static String binToHex(String bin) {
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String hexStr = "";
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int size = bin.length() / 8;
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for (int i = 0; i < size; i++) {
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String value = bin.substring(i * 8, (i + 1) * 8);
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int temp = Integer.parseInt(value, 2);
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String tempHex = Integer.toHexString(temp);
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hexStr += tempHex;
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}
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return hexStr;
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}
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/**
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* 二进制转16进制，不足2位补位
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*
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* @param bin
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* @return
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*/
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public static String bin2Hex(String bin) {
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String hexStr = "";
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int size = bin.length() / 8;
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for (int i = 0; i < size; i++) {
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String value = bin.substring(i * 8, (i + 1) * 8);
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int temp = Integer.parseInt(value, 2);
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String tempHex = Integer.toHexString(temp);
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if (tempHex.length() < 2) {
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tempHex = "0" + tempHex;
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}
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hexStr += tempHex;
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}
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return hexStr;
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}
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/**
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* 转为十六进制串，不足2位补0
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*
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* @param value
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* @return
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*/
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public static String toHexString(int value) {
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String tempHex = Integer.toHexString(value);
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if (tempHex.length() < 2) {
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tempHex = "0" + tempHex;
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}
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return tempHex.toUpperCase();
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}
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public static String getTargetId(String value, boolean isTwo) {
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String tempHex = Integer.toHexString(Integer.valueOf(value));
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if (tempHex.length() < 2) {
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tempHex = "0" + tempHex;
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}
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if (isTwo) {
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if (tempHex.length() < 4) {
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tempHex = "0" + tempHex;
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}
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if (tempHex.length() < 4) {
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tempHex = "0" + tempHex;
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}
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}
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return tempHex.toUpperCase();
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}
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/**
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* 根据数值获取到长度为2字节的16进制字符
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*
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* @param value
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* @return
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*/
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public static String getHex2LenStr(int value) {
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String tempHex = Integer.toHexString(value);
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if (tempHex.length() < 2) {
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tempHex = "0" + tempHex;
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}
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if (tempHex.length() < 4) {
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tempHex = "0" + tempHex;
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}
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if (tempHex.length() < 4) {
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tempHex = "0" + tempHex;
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}
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return tempHex.toUpperCase();
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}
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public static String getOrderId(int value) {
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return getHex2LenStr(value);
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}
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/**
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* 将value转为same个相同满8位的二进制字串
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*
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* @param value
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* @param same
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* @return
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*/
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public static String toBinary8StringSame(int value, int same) {
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String tempBinStr = toBinary8String(value);
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String rsBinStr = "";
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for (int i = 0; i < same; i++) {
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rsBinStr += tempBinStr;
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}
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return rsBinStr;
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}
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/**
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* 不足width个字节宽度时，前面补0至width*8
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*
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* @param value
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* @param width
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* @return
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*/
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public static String toBinary8String(int value, int width) {
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String tempBinStr = toBinary8String(value);
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int size = tempBinStr.length();
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for (int i = 0; i < width; i++) {
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int temp = (i + 1) * 8;
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if (temp > size) {
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tempBinStr = "00000000" + tempBinStr;
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size = tempBinStr.length();
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}
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}
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return tempBinStr;
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}
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/**
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* 补足8位
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*
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* @param value
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* @return
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*/
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public static String toBinary8String(int value) {
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String temp = Integer.toBinaryString(value);
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if (value == 0) {
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temp = "00000000";
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}
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int length = temp.length();
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while (length < 8) {
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temp = "0" + temp;
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length = temp.length();
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}
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return temp;
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}
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public static String toEmptyBinaryWidthString(int width) {
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String str = "";
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for (int i = 0; i < width; i++) {
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str += "00000000";
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}
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return str;
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}
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public static byte[] emptyBytes(int bytes) {
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byte[] bys = new byte[bytes];
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for (int i = 0; i < bytes; i++) {
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bys[i] = emptyByte();
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}
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return bys;
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}
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public static byte emptyByte() {
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Integer b0 = 0x00;
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return b0.byteValue();
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}
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public static byte binToBytes(String bin) {
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return Integer.valueOf(bin, 2).byteValue();
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}
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public static byte[] binaryStrToBytes(String binStr) {
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int size = binStr.length() / 8;
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byte[] bs = new byte[size];
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for (int i = 0; i < size; i++) {
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String temp = binStr.substring(i * 8, (i + 1) * 8);
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bs[i] = Integer.valueOf(temp, 2).byteValue();
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}
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return bs;
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}
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/**
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* 十六进制串转字节数组
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*
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* @param hexStr
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* @return
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*/
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public static byte[] hexStrToBytes(String hexStr) {
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int size = hexStr.length() / 2;
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byte[] bytes = new byte[size];
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for (int i = 0; i < size; i++) {
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String tmp = hexStr.substring(i * 2, (i + 1) * 2);
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Integer tmpHex = Integer.parseInt(tmp, 16);
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bytes[i] = tmpHex.byteValue();
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}
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return bytes;
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}
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/**
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* 两字节高低位装换
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*
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* @param b
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* @return
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*/
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public static byte[] hexHeightLow(byte[] b) {
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byte[] b2 = new byte[2];
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// 转换高低位
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b2[0] = b[1];
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b2[1] = b[0];
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return b2;
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}
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/**
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* 16进制转换为10进制
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*
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* @param strHex
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* @return
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*/
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public static int hexToInt(String strHex) {
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short s = (short) (Integer.valueOf(strHex, 16) & 0xffff);
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return s;
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}
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/**
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* 16进制转换为10进制
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*
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* @param strHex
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* @return
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*/
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public static int hexToBigInt(String strHex) {
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BigInteger bigint = new BigInteger(strHex, 16);
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return bigint.intValue();
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}
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/**
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* int转16进制字符串 2位 00 00
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*
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* @param num
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* @return
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*/
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public static String intToHexStr(int num) {
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// 需要使用2字节表示b
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return String.format("%04x", num).toUpperCase();
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}
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// 计算16进制对应的数值
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public static int GetHex(char ch) throws Exception {
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if (ch >= '0' && ch <= '9')
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return (int) (ch - '0');
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if (ch >= 'a' && ch <= 'f')
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return (int) (ch - 'a' + 10);
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if (ch >= 'A' && ch <= 'F')
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return (int) (ch - 'A' + 10);
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throw new Exception("error param");
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}
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// 计算幂
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public static int GetPower(int nValue, int nCount) throws Exception {
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if (nCount < 0)
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throw new Exception("nCount can't small than 1!");
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if (nCount == 0)
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return 1;
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int nSum = 1;
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for (int i = 0; i < nCount; ++i) {
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nSum = nSum * nValue;
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}
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return nSum;
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}
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public static void main(String[] args) {
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double d1 = hexToBigInt("000906EB")/100.0;
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double d2 = hexToBigInt("0004F6E6")/100.0;
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System.out.println(d1);
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System.out.println(d2);
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System.out.println(d1 + d2);
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}
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/**
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* 16进制字符串 高低换位
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*
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* @param info
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* @return
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*/
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public static String tran_LH(String info) {
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return info.substring(2) + info.substring(0, 2);
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}
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/**
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* 16进制字符串 高低换位 8个字符
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*
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* @param info
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* @return
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*/
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public static String tran_LH8(String info) {
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return tran_LH(info.substring(4)) + tran_LH(info.substring(0, 4));
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}
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/**
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* 将 4字节的16进制字符串，转换为32位带符号的十进制浮点型
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*
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* 42c60000 -> 99.00
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*
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* @param str
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* 4字节 16进制字符
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* @return
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*/
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public static float hexToFloat(String str) {
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return Float.intBitsToFloat(new BigInteger(str, 16).intValue());
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}
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/**
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* 将带符号的32位浮点数装换为16进制
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*
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* 99.00 -> 42c60000
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*
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*
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* @param value
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* @return
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*/
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public static String folatToHexString(Float value) {
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return Integer.toHexString(Float.floatToIntBits(value));
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}
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/**
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* int转16进制字符串 1位置 00
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*
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* @param num
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* @return
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*/
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public static String intToHexStr1(int num) {
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// 需要使用2字节表示b
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return String.format("%02x", num).toUpperCase();
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}
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public static String hexString2binaryString(String hexString, int num) {
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//16进制转10进制
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BigInteger sint = new BigInteger(hexString, num);
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//10进制转2进制
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String str = sint.toString(2);
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if(str.length() < num){
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for (int i = str.length(); i < num; i++) {
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str = "0" + str;
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}
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}
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return str;
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}
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/**
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* 将二进制转换为10进制
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* @param binStr
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* @return
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*/
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public static Integer biannary2Decimal(String binStr){
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Integer sum = 0;
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int len = binStr.length();
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for (int i=1;i<=len;i++){
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//第i位 的数字为：
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int dt = Integer.parseInt(binStr.substring(i-1,i));
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sum+=(int)Math.pow(2,len-i)*dt;
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}
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return sum;
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}
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/**
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* 二进制补码：取反口加1
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* @param str
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* @return
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*/
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public static Integer twoToString(String str) {
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String two = "";
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String[] split = str.split("");
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for (int i = 0;i< split.length;i++){
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if("1".equals(split[i])){
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two += "0";
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}else if("0".equals(split[i])){
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two += "1";
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}
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}
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return biannary2Decimal(two) + 1;
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}
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}
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