開發的時候發現,C#寫入的字節順序是從低到高(左低到右高),而Java的DataInputStream讀取的數據是從高到低(左高到右低),所以當我們要用Java讀取C#生成的二進制文件的時候,需要將DataInputStream里面的幾個方法重寫或者寫一些輔助方法,例如下面兩個函數是用來讀取C#寫入的無符號Short型和無符號長整型數據。
/**
* 逆轉字節數組
*
* @param b
* @return
*/
private static byte[] reverse(byte[] b) {
byte[] temp = new byte[b.length];
for (int i = 0; i < b.length; i++) {
temp[i] = b[b.length - 1 - i];
}
return temp;
}
/**
* 讀取無符號位的Short數,16位
*
* @param readBuffer
* @return
* @throws IOException
*/
public static final BigInteger readUnsignedShort(byte[] readBuffer)
throws IOException {
if (readBuffer == null || readBuffer.length < 2)
return new BigInteger("0");
// 處理成無符號數
byte[] uint64 = new byte[3];
uint64[2] = 0;
System.arraycopy(readBuffer, 0, uint64, 0, 2);
return new BigInteger(reverse(uint64));
}
/**
* 讀取無符號位的長整數,64位
*
* @param readBuffer
* @return
* @throws IOException
*/
public static final BigInteger readUnsignedInt64(byte[] readBuffer)
throws IOException {
if (readBuffer == null || readBuffer.length < 8)
return new BigInteger("0");
// 處理成無符號數
byte[] uint64 = new byte[9];
uint64[8] = 0;
System.arraycopy(readBuffer, 0, uint64, 0, 8);
return new BigInteger(reverse(uint64));
}
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posted on 2010-05-02 22:25
TiGERTiAN 閱讀(3167)
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