package com.dayu.baselibrary.tools;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* Created by zuo on 2018/12/2.
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*/
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public class Utils {
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/**
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* 字符串转换成为16进制(无需Unicode编码)
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*
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* @param str
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* @return
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*/
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public static String str2HexStr(String str) {
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char[] chars = "0123456789ABCDEF".toCharArray();
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StringBuilder sb = new StringBuilder("");
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byte[] bs = str.getBytes();
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int bit;
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for (int i = 0; i < bs.length; i++) {
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bit = (bs[i] & 0x0f0) >> 4;
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sb.append(chars[bit]);
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bit = bs[i] & 0x0f;
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sb.append(chars[bit]);
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// sb.append(' ');
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}
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return sb.toString().trim();
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}
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/**
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* 字节数组转16进制删除为0的
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*
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* @param bytes 需要转换的byte数组
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* @return 转换后的Hex字符串
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*/
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public static String bytesToHexClean0(byte[] bytes) {
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StringBuffer sb = new StringBuffer();
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for (int i = 0; i < bytes.length; i++) {
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String hex = Integer.toHexString(bytes[i] & 0xFF);
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if ("0".equals(hex))
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break;
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if (hex.length() < 2) {
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sb.append(0);
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}
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sb.append(hex);
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}
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return sb.toString();
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}
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/**
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* 16进制转Byte
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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[] hexStringToByte(String hex) {
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int len = (hex.length() / 2);
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byte[] result = new byte[len];
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char[] achar = hex.toCharArray();
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for (int i = 0; i < len; i++) {
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int pos = i * 2;
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result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1]));
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}
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return result;
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}
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private static int toByte(char c) {
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byte b = (byte) "0123456789ABCDEF".indexOf(c);
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return b;
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}
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/**
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* 16进制转换成为string类型字符串
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*
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* @param s
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* @return
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*/
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public static String hexStringToString(String s) {
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if (s == null || s.equals("")) {
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return null;
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}
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s = s.replace(" ", "");
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byte[] baKeyword = new byte[s.length() / 2];
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for (int i = 0; i < baKeyword.length; i++) {
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try {
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baKeyword[i] = (byte) (0xff & Integer.parseInt(s.substring(i * 2, i * 2 + 2), 16));
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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try {
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s = new String(baKeyword, "UTF-8");
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new String();
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} catch (Exception e1) {
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e1.printStackTrace();
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}
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return s;
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}
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/**
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* byte转bit
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*
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* @param by
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* @return
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*/
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public static String getBit(byte by) {
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StringBuffer sb = new StringBuffer();
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sb.append((by >> 7) & 0x1)
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.append((by >> 6) & 0x1)
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.append((by >> 5) & 0x1)
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.append((by >> 4) & 0x1)
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.append((by >> 3) & 0x1)
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.append((by >> 2) & 0x1)
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.append((by >> 1) & 0x1)
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.append((by >> 0) & 0x1);
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return sb.toString();
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}
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/**
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* byte转bit
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*
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* @param by
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* @return
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*/
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public static String getBit(byte[] by) {
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StringBuffer sb = new StringBuffer();
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for (int i = 0; i < by.length; i++) {
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sb.append((by[i] >> 7) & 0x1)
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.append((by[i] >> 6) & 0x1)
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.append((by[i] >> 5) & 0x1)
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.append((by[i] >> 4) & 0x1)
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.append((by[i] >> 3) & 0x1)
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.append((by[i] >> 2) & 0x1)
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.append((by[i] >> 1) & 0x1)
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.append((by[i] >> 0) & 0x1);
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sb.append("\n");
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}
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return sb.toString();
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}
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/**
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* bit转byte
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*
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* @param bit
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* @return
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*/
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public static byte bitToByte(String bit) {
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int re, len;
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if (null == bit) {
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return 0;
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}
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len = bit.length();
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if (len != 4 && len != 8) {
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return 0;
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}
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if (len == 8) {// 8 bit处理
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if (bit.charAt(0) == '0') {// 正数
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re = Integer.parseInt(bit, 2);
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} else {// 负数
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re = Integer.parseInt(bit, 2) - 256;
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}
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} else {//4 bit处理
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re = Integer.parseInt(bit, 2);
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}
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return (byte) re;
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}
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/**
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* short转byte数组
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*
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* @param x
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* @return
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*/
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public static byte[] short2Byte(short x) {
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byte high = (byte) (0x00FF & (x >> 8));//定义第一个byte
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byte low = (byte) (0x00FF & x);//定义第二个byte
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byte[] bytes = new byte[2];
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bytes[0] = high;
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bytes[1] = low;
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return bytes;
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}
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/**
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* short转byte
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*
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* @param x
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* @return
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*/
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public static byte[] short2ByteNew(short x) {
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byte high = (byte) (0x00FF & (x >> 8));//定义第一个byte
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byte low = (byte) (0x00FF & x);//定义第二个byte
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byte[] bytes = new byte[2];
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bytes[1] = high;
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bytes[0] = low;
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return bytes;
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}
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/**
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* byte[]转short
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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 short byte2shortNew(byte[] bytes) {
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byte high = bytes[1];
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byte low = bytes[0];
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short z = (short) (((high & 0x00FF) << 8) | (0x00FF & low));
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return z;
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}
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//byte 数组与 int 的相互转换
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public static int byteArrayToInt(byte[] b) {
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return b[0] & 0xFF |
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(b[1] & 0xFF) << 8 |
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(b[2] & 0xFF) << 16 |
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(b[3] & 0xFF) << 24;
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}
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public static byte[] intToByteArray(int a) {
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return new byte[]{
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(byte) (a & 0xFF),
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(byte) ((a >> 8) & 0xFF),
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(byte) ((a >> 16) & 0xFF),
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(byte) ((a >> 24) & 0xFF)
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};
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}
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public static String intToString(int a) {
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StringBuffer data = new StringBuffer();
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byte[] byteData = new byte[]{
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(byte) ((a >> 24) & 0xFF),
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(byte) ((a >> 16) & 0xFF),
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(byte) ((a >> 8) & 0xFF),
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(byte) (a & 0xFF)
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};
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return data.append(getBit(byteData[0])).append(getBit(byteData[1])).append(getBit(byteData[2])).append(getBit(byteData[3])).toString();
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}
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/**
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* 获取4位的用户号
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*
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* @return
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*/
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public static String getName(String name) {
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String data = name;
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for (int i = 0; i < 4 - name.length(); i++) {
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data = "0" + data;
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}
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return data;
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}
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/**
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* @param data
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* @param total 一共多少位
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* @return
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*/
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public static int bitToInt(byte[] data, int total) {
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String strData = intToString(byteArrayToInt(data));
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strData = strData.substring(0, total);
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for (int i = 0; i < 32 - total; i++) {
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strData = "0" + strData;
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}
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return bitToInt(strData);
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}
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public static int bitToInt(String data) {
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if (data.length() == 32) {
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byte[] byteData = new byte[4];
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byteData[0] = bitToByte(data.substring(24));
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byteData[1] = bitToByte(data.substring(16, 24));
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byteData[2] = bitToByte(data.substring(8, 16));
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byteData[3] = bitToByte(data.substring(0, 8));
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return byteArrayToInt(byteData);
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} else {
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return 0;
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}
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}
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//判断是否为有效身份证号
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public static boolean check(String str) {
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String patt="";
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if(str.length()==15)
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patt="^[1-9]\\d{5}\\d{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\\d{3}$";
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else if(str.length()==18)
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patt="^[1-9]\\d{5}(18|19|([23]\\d))\\d{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\\d{3}[0-9Xx]$";
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else
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return false;
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Pattern r = Pattern.compile(patt);
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Matcher matcher = r.matcher(str);
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return matcher.find();
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}
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public static void main(String[] args) {
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Utils.getBit((byte) 49);
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}
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}
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