バイトストリームに変換
4427 ワード
package eccl.socket.tools;
public class ByteOperator{
public ByteOperator(){
}
/**
* byte
*/
public static void putLong(byte[] buf,int offset,long value) {
buf[offset + 0] = (byte) ((value >> 56) & 0xff);
buf[offset + 1] = (byte) ((value >> 48) & 0xff);
buf[offset + 2] = (byte) ((value >> 40) & 0xff);
buf[offset + 3] = (byte) ((value >> 32) & 0xff);
buf[offset + 4] = (byte) ((value >> 24) & 0xff);
buf[offset + 5] = (byte) ((value >> 16) & 0xff);
buf[offset + 6] = (byte) ((value >> 8) & 0xff);
buf[offset + 7] = (byte) ((value >> 0) & 0xff);
}
/**
* byte Long
*/
public static long getLong(byte[] bytes, int index) {
return ((((long) bytes[index + 0] & 0xff) << 56)
| (((long) bytes[index + 1] & 0xff) << 48)
| (((long) bytes[index + 2] & 0xff) << 40)
| (((long) bytes[index + 3] & 0xff) << 32)
| (((long) bytes[index + 4] & 0xff) << 24)
| (((long) bytes[index + 5] & 0xff) << 16)
| (((long) bytes[index + 6] & 0xff) << 8) | (((long) bytes[index + 7] & 0xff) << 0));
}
/**
* byte
*/
public static void putInt(byte[] buf,int offset,int value) {
buf[offset+0] = (byte)((value >> 24) & 0xff);
buf[offset+1] = (byte)((value >> 16) & 0xff);
buf[offset+2] = (byte)((value >> 8) & 0xff);
buf[offset+3] = (byte)((value >> 0) & 0xff);
}
/**
* byte int
*/
public static int getInt(byte[] bytes, int index) {
return (int) ((((bytes[index + 0] & 0xff) << 24) | ((bytes[index + 1] & 0xff) << 16) | ((bytes[index + 2] & 0xff) << 8) | ((bytes[index + 3] & 0xff) << 0)));
}
/**
* byte
*/
public static void putFloat(byte[] buf,int offset,float value){
try {
putInt(buf,offset,Float.floatToIntBits(value));
}
catch (Exception ex) {
System.out.print("convert the float to Byte is error!
");
}
}
/**
* byte
*/
public static float getFloat(byte[] bytes,int index){
int num = ((bytes[index]<<24)&0xFF000000)|((bytes[index+1]<<16)&0xFF0000)|((bytes[index+2]<<8)&0xFF00)|(bytes[index+3]&0xFF);
float f = Float.intBitsToFloat(num);
return f;
}
/**
* byte short
*/
public static short getShort(byte[] bytes, int index) {
return (short) (((bytes[index] << 8) | bytes[index + 1] & 0xff));
}
/**
* byte
*/
public static void putShort(byte[] buf,int offset,short value) {
buf[offset+0] = (byte)((value >> 8) & 0xff);
buf[offset+1] = (byte)((value >> 0) & 0xff);
}
/**
* byte
*/
public static void putStr(byte[] buf,int offset,int length,String value) {
try{
byte[] tmpByte = value.getBytes();
for(int i=length-1;i>=0;i--){
// buf[offset+i] = tmpByte[i];
buf[offset+i] = tmpByte[i];
}
}catch(Exception e)
{
System.out.print("convert the String to Byte is error!
"+e);
}
}
/**
* byte
*/
public static String getStr(byte[] bytes,int index){
byte[] str = new byte[4];
for(int i=0;i<4;i++){
str[i] = bytes[index+i];
}
return new String(str);
}
}