利用IO流实现基本类型与byte数组的互转

这里以double为例

double--->byte[]

public static byte[] convert(double num) throws IOException{
byte[] data=null;

ByteArrayOutputStream bos=new ByteArrayOutputStream();
DataOutputStream dos=new DataOutputStream(bos);
dos.writeDouble(num);
dos.flush();

data=bos.toByteArray();
dos.close();
return data;
}

byte[]--->double

public static double convert(byte[] data) throws IOException{
DataInputStream dis=new DataInputStream(new ByteArrayInputStream(data));
double num=dis.readDouble();
dis.close();
return num;
}