java 合并两个byte数组

byte[] data1;

byte[] data2;

byte[] data = data1 + data2;

byte[] data3 = new byte[data1.length+data2.length];
  System.arraycopy(data1,0,data3,0,data1.length);
  System.arraycopy(data2,0,data3,data1.length,data2.length);