Java socket gets hexadecimal data round integers and strings

Recently used in the development of Java docking a temperature detection equipment, the business is to use the scan two-dimensional code to confirm the identity, and then detect body temperature, and finally submitted to the server, the process used to the hexadecimal string and integer, string, Chinese characters and other conversion between.

Socket Receive code:

The code is as follows

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InputStream input = null; public void Run () { System.out.println ("1111111111111111111111111111111111111111111111111111111"); try { Using loops to read from the socket the data sent from the client. Boolean done=true; try { byte[] buf = new byte[100]; int len = 0; int serial=1; while (len = Input.read (buf))!=-1) { { Byte[] type={buf[4]}; String a=byteutil.printhexstring (type); SYSTEM.OUT.PRINTLN ("message type" +a); try { Switch (a) { Case "02": Tiwenservice.dotiwen (buf,socket,serial)//Body temperature information Break Case "03"://Get the name corresponding to the two-dimensional code Tiwenservice.getchild (buf,socket,serial); Break Case "01"://Device startup information Tiwenservice.startup (buf,socket,serial); Default Break } serial++; catch (Exception e) { E.printstacktrace (); } } catch (Exception e) { E.printstacktrace (); } }

Then share the conversion code:

The code is as follows

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public static int Bytestoint (byte[] brefarr) { int ioutcome = 0; BYTE bloop; for (int i = 0; i < brefarr.length; i++) { Bloop = Brefarr[i]; Ioutcome + = (bloop & 0xFF) << (8 * i); } return ioutcome; } public static final String bytestohexstring (byte[] barray) { StringBuffer sb = new StringBuffer (barray.length); String stemp; for (int i = 0; i < barray.length; i++) { Stemp = integer.tohexstring (0xFF & Barray[i]); if (Stemp.length () < 2) Sb.append (0); Sb.append (Stemp.touppercase ()); } return sb.tostring (); } byte-digit spin string public static String printhexstring (byte[] b) { String Hexs = ""; for (int i = 0; i < b.length; i++) { String hex = integer.tohexstring (B[i] & 0xFF); if (hex.length () = = 1) { Hex = ' 0 ' + hex; } Hexs + = hex; } return hexs; } /* * 16 in-process string reshaping */ public static int Oxstringtoint (String ox) throws Exception { Ox = Ox.tolowercase (); if (Ox.startswith ("0x")) { Ox = ox.substring (2, Ox.length ()); } Integer ri = 0; Integer Oxlen = Ox.length (); for (int i = 0; i < Oxlen; i++) { char C = Ox.charat (i); int h; if ((' 0 ' <= C && c <= ' 9 ')) { h = c-48; else if ((' A ' <= C && c <= ' F ')) { h = c-87; else if (' A ' <= c && c <= ' F ') { h = c-55; } else { Throw (new Exception ("Not a Integer"); } byte left = (byte) ((Oxlen-i-1) * 4); RI |= (h << left); } Return RI; } 16 in-process string public static string hexstring2string (String src) { String temp = ""; for (int i = 0; i < src.length ()/2; i++) { temp = Temp + (char) integer.valueof (src.substring (i * 2, I * 2 + 2), ). Bytevalue (); } return temp; } Integer to byte array public static byte[] Inttobytes (int var) { Byte[] B = new byte[2]; B[0]= (Byte) (var>>24); B[1]= (Byte) (var>>16); B[2]= (Byte) (var>>8); B[3]= (Byte) (VAR); B[0] = (byte) (var >> 8); B[1] = (byte) (VAR); return b; } /** * Generate 16 feed additive and check code * * @param data to remove the check digit * @return */ public static string Makechecksum (string data) { if (Stringutils.isempty (data)) { Return ""; } int total = 0; int len = Data.length (); int num = 0; while (Num < len) { String s = data.substring (num, num + 2); Total + = Integer.parseint (s, 16); num = num + 2; } /** * Use 256 to calculate the maximum is 255, that is, 16 ff */ int mod = total; String hex = integer.tohexstring (mod & 0xFF); Len = Hex.length (); If the length of the check bit is not enough, fill 0, here is a two-digit checksum if (Len < 2) { Hex = "0" + hex; } return hex; } /** * 16 binary string converted to byte array * @param 16 Feed string * @return converted byte array */ public static byte[] Hex2byte (String hex) { String digital = "0123456789ABCDEF"; char[] Hex2char = Hex.tochararray (); byte[] bytes = new Byte[hex.length ()/2]; int temp; for (int i = 0; i < bytes.length; i++) { In fact, it's the same as the above function. Multiple 16 is 4 digits to the right, which makes it a high 4. And then add the lower four digits, equivalent to the bitwise operation "|" The added number carries a bit "&" operation to prevent the automatic expansion of negative numbers. {0xFF byte maximum number of representations} temp = Digital.indexof (hex2char[2 * i]) * 16; Temp + + digital.indexof (hex2char[2 * i + 1]); Bytes[i] = (byte) (temp & 0xff); } return bytes; }