Java将字符串string str=轨道面，转换为16进制20字节无符号整数数组

可以使用Java中的getBytes()方法将字符串转换为字节数组，再将字节数组转换为16进制字符串，最后使用Java中的BigInteger类将16进制字符串转换为20字节无符号整数数组。

以下是示例代码：

String str = "轨道面";
byte[] bytes = str.getBytes();
String hexString = "";
for (int i = 0; i < bytes.length; i++) {
    String hex = Integer.toHexString(bytes[i] & 0xFF);
    if (hex.length() == 1) {
        hexString += "0";
    }
    hexString += hex;
}
byte[] unsignedInt = new BigInteger(hexString, 16).toByteArray();
if (unsignedInt.length > 20) {
    byte[] temp = new byte[20];
    System.arraycopy(unsignedInt, unsignedInt.length - 20, temp, 0, 20);
    unsignedInt = temp;
} else if (unsignedInt.length < 20) {
    byte[] temp = new byte[20];
    System.arraycopy(unsignedInt, 0, temp, 20 - unsignedInt.length, unsignedInt.length);
    unsignedInt = temp;
}

这段代码将字符串"轨道面"转换为20字节无符号整数数组。