package com.boying.util;
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import java.util.Arrays;
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import java.util.UUID;
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public class StringUtil {
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/** 16进制中的字符集 */
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private static final String HEX_CHAR = "0123456789ABCDEF";
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/** 16进制中的字符集对应的字节数组 */
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private static final byte[] HEX_STRING_BYTE = HEX_CHAR.getBytes();
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public static boolean isNullOrEmpty(String str) {
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if (null == str || "".equalsIgnoreCase(str.trim())
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|| "null".equals(str.trim())) {
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return true;
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}
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return false;
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}
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public static byte[] convertNum(String s){
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String[] split = s.split("-");
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byte[] bytes = new byte[split.length];
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for (int i = 0; i < split.length; i++) {
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String s1 = split[i];
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byte b = Byte.parseByte("0x"+s1);
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bytes[i]=b;
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}
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return bytes;
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}
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public static String toStr(String[] strs){
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String s = Arrays.toString(strs);
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String substring = s.substring(1, s.length() - 1);
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String s1 = substring.replaceAll(",", "");
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String s2 = s1.replaceAll(" ", "");
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return s2;
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}
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public static byte[] toBytes(String strs){
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String[] split = strs.split("-");
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byte[] bytes = new byte[split.length];
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for (int i = 0; i < split.length; i++) {
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String s = split[i];
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bytes[i] = (byte) Byte.parseByte(s);
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}
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return bytes;
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}
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public static byte[] hex2Byte(String hex) {
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System.out.println();
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String[] parts = hex.split("-");
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byte[] bytes = new byte[parts.length];
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for (int i = 0; i < parts.length; i++) {
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bytes[i] = (byte) (Integer.parseInt(parts[i],10));
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System.out.print(bytes[i]+ " ");
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}
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return bytes;
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}
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public static String getUUID() {
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return UUID.randomUUID().toString().replaceAll("-", "");
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}
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/**
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* 将指定byte数组以16进制的形式打印到控制台
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*
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* @param hint String
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* @param b byte[]
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* @return void
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*/
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public static void printHexString(String hint, byte[] b) {
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System.out.print(hint);
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for (int i = 0; i < b.length; i++) {
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String hex = Integer.toHexString(b[i] & 0xFF);
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if (hex.length() == 1) {
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hex = '0' + hex;
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}
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System.out.print(hex.toUpperCase() + " ");
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}
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}
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/**
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* @param b byte[]
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* @return String
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*/
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public static String Bytes2HexString(byte[] b) {
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String ret = "";
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for (int i = 0; i < b.length; i++) {
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String hex = Integer.toHexString(b[i] & 0xFF);
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if (hex.length() == 1) {
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hex = '0' + hex;
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}
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ret += " 0x" + hex.toUpperCase();
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}
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return ret;
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}
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/**
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* 将指定字符串src，以每两个字符分割转换为16进制形式 如："2B44EFD9" –> byte[]{0x2B, 0×44, 0xEF,
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* 0xD9}
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*
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* @param src String
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* @return byte[]
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*/
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public static byte[] HexString2Bytes(String src) {
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if (null == src || 0 == src.length()) {
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return null;
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}
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// String s1 = src.replaceAll("-", "");
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byte[] ret = new byte[src.length() / 2];
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byte[] tmp = src.getBytes();
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for (int i = 0; i < (tmp.length / 2); i++) {
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ret[i] = (byte)uniteBytes(tmp[i * 2], tmp[i * 2 + 1]);
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}
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return ret;
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}
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/**
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* 将两个ASCII字符合成一个字节； 如："EF"–> 0xEF
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*
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* @param src0 byte
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* @param src1 byte
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* @return byte
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*/
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public static byte uniteBytes(byte src0, byte src1) {
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byte _b0 = Byte.decode("0x" + new String(new byte[]{src0})).byteValue();
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_b0 = (byte) (_b0 << 4);
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byte _b1 = Byte.decode("0x" + new String(new byte[]{src1})).byteValue();
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byte ret = (byte) (_b0 ^ _b1);
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return ret;
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}
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/**
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* 10进制字节数组转换为16进制字节数组
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*
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* byte用二进制表示占用8位，16进制的每个字符需要用4位二进制位来表示，则可以把每个byte
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* 转换成两个相应的16进制字符，即把byte的高4位和低4位分别转换成相应的16进制字符，再取对应16进制字符的字节
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*
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* @param b 10进制字节数组
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* @return 16进制字节数组
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*/
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public static byte[] byte2hex(byte[] b) {
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int length = b.length;
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byte[] b2 = new byte[length << 1];
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int pos;
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for(int i=0; i<length; i++) {
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pos = 2*i;
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b2[pos] = HEX_STRING_BYTE[(b[i] & 0xf0) >> 4];
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b2[pos+1] = HEX_STRING_BYTE[b[i] & 0x0f];
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}
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return b2;
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}
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/**
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* 16进制字节数组转换为10进制字节数组
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*
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* 两个16进制字节对应一个10进制字节，则将第一个16进制字节对应成16进制字符表中的位置(0~15)并向左移动4位，
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* 再与第二个16进制字节对应成16进制字符表中的位置(0~15)进行或运算，则得到对应的10进制字节
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* @param b 10进制字节数组
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* @return 16进制字节数组
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*/
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public static byte[] hex2byte(byte[] b) {
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if(b.length%2 != 0) {
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throw new IllegalArgumentException("byte array length is not even!");
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}
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int length = b.length >> 1;
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byte[] b2 = new byte[length];
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int pos;
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for(int i=0; i<length; i++) {
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pos = i << 1;
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b2[i] = (byte) (HEX_CHAR.indexOf( b[pos] ) << 4 | HEX_CHAR.indexOf( b[pos+1] ) );
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}
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return b2;
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}
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/**
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* 将16进制字节数组转成10进制字符串
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* @param b 16进制字节数组
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* @return 10进制字符串
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*/
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public static String hex2Str(byte[] b) {
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return new String(hex2byte(b));
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}
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/**
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* 将10进制字节数组转成16进制字符串
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* @param b 10进制字节数组
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* @return 16进制字符串
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*/
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public static String byte2HexStr(byte[] b) {
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return Integer.toHexString(Integer.parseInt(new String(b)));
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}
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public static void main(String[] args) {
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}
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}
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