这里简单记录下两种转换方式：
第一种：
1、int与byte[]之间的转换（类似的byte short,long型）
- public static byte[] intToBytes( int value )
- {
- byte[] src = new byte[4];
- src[3] = (byte) ((value>>24) & 0xFF);
- src[2] = (byte) ((value>>16) & 0xFF);
- src[1] = (byte) ((value>>8) & 0xFF);
- src[0] = (byte) (value & 0xFF);
- return src;
- }
-
- public static byte[] intToBytes2(int value)
- {
- byte[] src = new byte[4];
- src[0] = (byte) ((value>>24) & 0xFF);
- src[1] = (byte) ((value>>16)& 0xFF);
- src[2] = (byte) ((value>>8)&0xFF);
- src[3] = (byte) (value & 0xFF);
- return src;
- }
byte[]转int
- public static int bytesToInt(byte[] src, int offset) {
- int value;
- value = (int) ((src[offset] & 0xFF)
- | ((src[offset+1] & 0xFF)<<8)
- | ((src[offset+2] & 0xFF)<<16)
- | ((src[offset+3] & 0xFF)<<24));
- return value;
- }
-
-
- public static int bytesToInt2(byte[] src, int offset) {
- int value;
- value = (int) ( ((src[offset] & 0xFF)<<24)
- |((src[offset+1] & 0xFF)<<16)
- |((src[offset+2] & 0xFF)<<8)
- |(src[offset+3] & 0xFF));
- return value;
- }
第二种：
1、int与byte[]之间的转换（类似的byte
short,long型）
-
- public static byte[] intToBytes(int value)
- {
- byte[] byte_src = new byte[4];
- byte_src[3] = (byte) ((value & 0xFF000000)>>24);
- byte_src[2] = (byte) ((value & 0x00FF0000)>>16);
- byte_src[1] = (byte) ((value & 0x0000FF00)>>8);
- byte_src[0] = (byte) ((value & 0x000000FF));
- return byte_src;
- }
byte[]转int
-
- public static int bytesToInt(byte[] ary, int offset) {
- int value;
- value = (int) ((ary[offset]&0xFF)
- | ((ary[offset+1]<<8) & 0xFF00)
- | ((ary[offset+2]<<16)& 0xFF0000)
- | ((ary[offset+3]<<24) & 0xFF000000));
- return value;
- }
byte[]数组和int之间的转换
原文：http://www.cnblogs.com/Free-Thinker/p/6878959.html
