package cn.miw.hp.test;public class ToUnsigned { public static long getUnSignedLong(long l) { return getLong(longToDword(l), 0); }// 將long型數(shù)據(jù)轉(zhuǎn)換為Dword的字節(jié)數(shù)組（C/C++的無(wú)符號(hào)整數(shù)） private static byte[] longToDword(long value) {byte[] data = new byte[4];for (int i = 0; i < data.length; i++) { data[i] = (byte) (value >> (8 * i)); }return data; }// 將C/C++的無(wú)符號(hào) DWORD類型轉(zhuǎn)換為java的long型 private static long getLong(byte buf[], int index) {int firstByte = (0x000000FF & ((int) buf[index])); int secondByte = (0x000000FF & ((int) buf[index + 1])); int thirdByte = (0x000000FF & ((int) buf[index + 2])); int fourthByte = (0x000000FF & ((int) buf[index + 3]));long unsignedLong = ((long) (firstByte | secondByte << 8 | thirdByte << 16 | fourthByte << 24)) & 0xFFFFFFFFL;return unsignedLong; } }

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