ByteBuffer转换为bigdecimal，binary，string [英] ByteBuffer to bigdecimal, binary, string

问题描述

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我有一个bytebuffer [128 bits] [其中有数字]，我需要将其转换为bigdecimal，二进制，字符串，因为这些是使用jdbc时对应的sql映射.

**Please check the edit at the bottom of this post
I have a bytebuffer[128 bits] [which has numbers] which I need to convert to bigdecimal, binary, string since these are the corresponding sql mapping while using jdbc.

是否可以使用库API来执行此操作.我看到String.valueof()并没有将字节数组作为参数，所以我坚持要做这样的事情:

Is there a library API that I can make use of to do this. I see String.valueof() does not take a byte array as a parameter.So I am stuck to doing something like this:

BigDecimal bd = new BigDecimal(bigmyBuffer.asCharBuffer().toString());

对我来说，这看起来像是骇客吗?有没有更好的方法可以做到这一点，或者更有效地完成jdbc部分.到目前为止，我专注于在各个sql列中进行插入.

This looks like a hack to me ?. Is there a better way of doing this or rather doing the jdbc part in an efficient manner. I am focused on doing inserts in the respective sql columns as of now.

我错了，字节缓冲区不仅是数字，而是各种各样的位.因此，现在我需要使用128位字节的缓冲区并将其转换为2个long，然后合并为一个十进制数，以便数字保持其完整性.所以像这样: LongBuffer lbUUID = guid.asLongBuffer();

I was wrong , the bytebuffers were not just numbers but all sort of bits. So now I need to take the 128 bit byte buffer and convert it to 2 longs and then merge to a bigdecimal so that the numbers maintain their sanity. So something like this: LongBuffer lbUUID = guid.asLongBuffer();

firstLong=      lbUUID.get();
secondLong =      lbUUID.get();

BigDecimal = firstLong + secondLong ;

谢谢.

推荐答案

也许最好绕过

May it is better to detour over BigInteger? Using BigInteger you can interpretate a byte-array as positive large number and from BigInteger it is a very small step to BigDecimal:

byte[] data= new byte[] { 0x12, 0x04, 0x07, 0x05, 0x08, 0x11, 0x38, 0x44, 0x77, 0x33};
BigInteger bi =new BigInteger(1,data);
BigDecimal bd = new BigDecimal(bi);

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