4{
5 unsigned character array [4] = {"0x0 ","0x0 ","0x02 ","0xe7 "};
6 unsigned long numbers;
7 num = 0;
8 for(int I = 0; I & ltsizeof (array); i++)
9 {
10 num & lt; & lt=8;
1 1 num | = array[I];
12 }
13 printf("num = %d ",number);
14 returns 0;
15
16}
Binary, byte array, character, hexadecimal, BCD coding conversion
* Convert 16 binary string into byte array.
* @param hex
* @ Return
*/
Public static byte [] Hexstringtobyte (string hexadecimal) {
int len =(hex . length()/2);
Byte[] result = new byte [len];
char[]achar = hex . tochararray();
for(int I = 0; I & ltleni++) {
int pos = I * 2;
result[I]=(byte)(toByte(achar[pos])& lt; & lt4 | toByte(achar[pos+ 1]);
}
Return the result;
}
Private static byte-to-byte (char c) (
byte b =(byte)" 0 123456789 abcdef "。 (c) Index of;
Return to b;
}
Public static final string bytestohexstring (byte [] barray) {
string buffer sb = new string buffer(barray . length);
String sTemp
for(int I = 0; I & ltbArray. Length; i++) {
sTemp = integer . tohexstring(0x ff & amp; bArray[I]);
if(stemp . length()& lt; 2)
sb . append(0);
sb . append(stemp . toupper case());
}
return sb . tostring();
}
Public static final object bytesToObject(byte[] bytes) throws IOException, ClassNotFoundException {
ByteArrayInputStream in = New ByteArrayInputStream (bytes);
ObjectInputStream oi = new ObjectInputStream (in);
object o = oi . read object();
oi . close();
Return o;
}
The public static final byte [] object byte (serializable) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
object output stream ot = new object output stream(out);
ot.writeObject
ot . flush();
ot . close();
return out . tobytearray();
}
The public static final string objecttohexstring (serializables) throws IOException{
Returns bytestohexstring (objecttobytes (s));
}
The public static final object hexstringtoobject (stringhex) throws IOException, ClassNotFoundException{
Returns bytestoobject (Hexstringtobyte (hex));
}
Public static string bcd2Str(byte[] bytes){
string buffer temp = new string buffer(bytes . length * 2);
for(int I = 0; I< bytes. Length; i++){
temp . append((byte)((bytes[I]& amp; 0xf0)>& gt& gt4));
temp . append((byte)(bytes[I]& amp; 0x0f));
}
Returns temp.toString (). Substring (0, 1). equalsIgnoreCase("0 ")? temp.toString()。 substring( 1):temp . tostring();
}
Common static byte [] str2Bcd (string asc) {
int len = ASC . length();
int mod = len % 2;
If (mod! = 0) {
ASC = " 0 "+ASC;
len = ASC . length();
}
Byte abt[] = new byte [len];
if(len & gt; = 2) {
len = len/2;
}
Byte bbt[] = new byte [len];
abt = ASC . getbytes();
int j,k;
for(int p = 0; p & ltASC . length()/2; p++) {
if((abt[2 * p]& gt; = ' 0 ')& amp; & amp(abt[2 * p]& lt; = '9')) {
j = abt[2 * p]--0;
} else if((abt[2 * p]& gt; = ' a ')& amp; & amp(abt[2 * p]& lt; = ' z '){
j = abt[2 * p]-' a '+0;
} Otherwise {
j = abt[2 * p]-' A '+0;
}
if((abt[2 * p+ 1]>; = ' 0 ')& amp; & amp(abt[2 * p+ 1]& lt; = '9')) {
k = abt[2 * p+ 1]-' 0 ';
} else if((abt[2 * p+ 1]& gt; = ' a ')& amp; & amp(abt[2 * p+ 1]& lt; = ' z '){
k = abt[2 * p+ 1]-' a '+0;
} Otherwise {
k = abt[2 * p+ 1]-' A '+0;
}
int a =(j & lt; & lt4)+k;
Byte b = (byte) a;
bbt[p]= b;
}
Return to bbt
}
Public static string BCD2ASC(byte[] bytes) {
string buffer temp = new string buffer(bytes . length * 2);
for(int I = 0; I< bytes. Length; i++) {
int h =((bytes[I]& amp; 0xf0)>& gt& gt4);
int l =(bytes[I]& amp; 0x0f);
temp.append(BToA[h])。 append(BToA[l]);
}
return temp . tostring();
}
Public static string MD5EncodeToHex (string source) (
Returns bytestohexstring (Md5encode (origin));
}
Public static byte [] MD5Encode (string source) {
Returns md5encode (origin. getbytes ());
}
Common static byte [] MD5Encode (byte [] byte) {
MessageDigest md = null
Try {
MD = message digest . getinstance(" MD5 ");
Returns md.digest (bytes);
} catch(nosuch algorithm exception e){
e . printstacktrace();
Returns a new byte [0];
}
}
//About byte: signed bytes map 0x00 ~ 0xff into two segments: 0~ 127 and-128~- 1. A simpler method is to use (b+256)%256 to return its value to 0~255, or use&; 0xff and assigned to an int.