java byte[] split

简单的字节数组分割方法,输入要拆分的数组及要按几个拆成一份即可,返回二维数组byte[],做记录直接上代码了。

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/**
* 拆分byte数组
*
* @param bytes
* 要拆分的数组
* @param copies
* 要按几个组成一份
* @return
*/
static byte[][] split_bytes(byte[] bytes, int copies) {

double split_length = Double.parseDouble(copies + "");

int array_length = (int) Math.ceil(bytes.length / split_length);
byte[][] result = new byte[array_length][];

int from, to;

for (int i = 0; i < array_length; i++) {

from = (int) (i * split_length);
to = (int) (from + split_length);

if (to > bytes.length)
to = bytes.length;

result[i] = Arrays.copyOfRange(bytes, from, to);
}

return result;
}

测试代码:

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byte[] sum = { 23, 4, 23, 42, 34, 2, 34, 2, 34, 2, 54, 3, 4, 56, 4, 7, 56, 7, 8, 5, 15, 2, 34, 2, 41, 2, 32, 3,
3, 3, 33 };

//按四个分成一组
byte[][] bytes = split_bytes(sum, 4);

System.out.println(bytes.length);

System.out.print("\r\n\r\n==========================================\r\n");

for (int i = 0; i < bytes.length; i++) {
for (int j = 0; j < bytes[i].length; j++) {
System.out.print(bytes[i][j] + " ");
}

System.out.println("");
}

输出结果:

8

23 4 23 42
34 2 34 2
34 2 54 3
4 56 4 7
56 7 8 5
15 2 34 2
41 2 32 3
3 3 33