二進(jìn)制轉(zhuǎn)換十六進(jìn)制

二進(jìn)制轉(zhuǎn)換十六進(jìn)制在Java中字節(jié)與十六進(jìn)制的相互轉(zhuǎn)換主要思想有兩點：1、 二進(jìn)制字節(jié)轉(zhuǎn)十六進(jìn)制時，將字節(jié)高位與0xF0做〃&〃操作，然后再左移4位，得到字節(jié)高位的十六進(jìn)制A;將字節(jié)低位與0x0F做〃&"操作，得到低位的十六進(jìn)制B，將兩個十六進(jìn)制數(shù)拼裝到一塊AB就是該字節(jié)的十六進(jìn)制表示。2、 十六進(jìn)制轉(zhuǎn)二進(jìn)制字節(jié)時，將十六進(jìn)制字符對應(yīng)的十進(jìn)制數(shù)字右移動4為，得到字節(jié)高位A;將字節(jié)低位的十六進(jìn)制字符對應(yīng)的十進(jìn)制數(shù)字B與A做〃|〃運算，即可得到十六進(jìn)制的二進(jìn)制字節(jié)表示我測試的Java代碼如下：Java代碼publicclassTest01{privatestaticStringhexStr="0123456789ABCDEF";privatestaticString[]binaryArray={〃0000〃，〃0001〃，〃0010〃，〃0011〃，〃0100〃，〃0101〃，〃0110〃，〃0111〃，〃1000〃，〃1001〃，〃1010〃，〃1011〃，〃1100〃,〃1101〃,〃1110〃,〃1111〃};publicstaticvoidmain(String[]args){Stringstr="二進(jìn)制與十六進(jìn)制互轉(zhuǎn)測試"；System.out.println("源字符串：\n"+str);StringhexString=BinaryToHexString(str.getBytes());System.out.println("轉(zhuǎn)換為十六進(jìn)制：\n"+hexString);System.out.println("轉(zhuǎn)換為二進(jìn)制：\n"+bytes2BinaryStr(str.getBytes()));byte[]bArray=HexStringToBinary(hexString);System.out.println("將str的十六進(jìn)制文件轉(zhuǎn)換為二進(jìn)制再轉(zhuǎn)為 String:\n"+newString(bArray));}/***@paramstr?return轉(zhuǎn)換為二進(jìn)制字符串*/publicstaticStringbytes2BinaryStr(byte[]bArray){StringoutStr="";intpos=0;for(byteb:bArray){//高四位pos=(b&0xF0)>>4;outStr+=binaryArray[pos];//低四位pos=b&0x0F;outStr+=binaryArray[pos];}returnoutStr;}/***@parambytes?return將二進(jìn)制轉(zhuǎn)換為十六進(jìn)制字符輸出*/publicstaticStringBinaryToHexString(byte[]bytes){Stringresult="";Stringhex="";for(inti=0;i<bytes.length;i++){//字節(jié)高4位hex=String.valueOf(hexStr.charAt((bytes[i]&0xF0)>>4));//字節(jié)低4位hex+=String.valueOf(hexStr.charAt(bytes[i]&0x0F));result+=hex+"";}returnresult;}/***?paramhexString?return將十六進(jìn)制轉(zhuǎn)換為字節(jié)數(shù)組*/publicstaticbyte[]HexStringToBinary(StringhexString){//hexString的長度對2取整，作為bytes的長度intlen=hexString.length()/2;byte[]bytes=newbyte[len];bytehigh=0;//字節(jié)高四位bytelow=0;//字節(jié)低四位for(inti=0;i<len;i++){〃右移四位得到高位high=(byte)((hexStr.indexOf(hexString.charAt(2*i)))<<4);low=(byte)hexStr.indexOf(hexString.charAt(2*i+1));bytes[i]=(byte)(high|low);//高地位做或運算}returnbytes;}}運行后的輸出結(jié)果如下：源字符串：二進(jìn)制與十六進(jìn)制互轉(zhuǎn)測試轉(zhuǎn)換為十六進(jìn)制：E4BA8CE8BF9BE588B6E4B88EE58D81E585ADE8BF9BE588B6E4BA92E8BDACE6B58BE8AF95轉(zhuǎn)換為二進(jìn)制：1110010010111010100011001110100010111111100110111110010110001000101101101110010010111000100011101110010110001101100000011110010110000101101011011110100010111111100110111110010110001000101101101110010010111010100100