bytearray

问题 My Question I'm looking for a way to convert the individual pdf pages into a byte[] (as in one byte[] per pdf page) so that I can then cast them to BufferedImage[]. This way, all the conversion is done in memory instead of making temporary files, making it faster and less messy. I may use the byte array for service calls later on as well. It would be nice if I could keep the library use to only itext, however, if there isn't any other way, I'm open to other libraries. What I have now This is

问题 Possible Duplicate Converting byte array to string and back again in C# I am using Huffman Coding for compression and decompression of some text from here The code in there builds a huffman tree to use it for encoding and decoding. Everything works fine when I use the code directly . For my situation, i need to get the compressed content, store it and decompress it when ever need. The output from the encoder and the input to the decoder are BitArray . When I tried convert this BitArray to

问题 I'm trying to find out the most efficient way to create a long byte string (or bytearray) by concatenating multiple shorter strings when the length of the whole string is known beforehand. I made this script and came up with these results: import time MSG = b'test message' COUNT = 30000 def bytes_list_test(): tStart = time.clock() l = [] for i in range(COUNT): l.append(MSG) bs = b''.join(l) print('byte list time:', time.clock() - tStart) def bytearray_test(): tStart = time.clock() ba =

问题 While there are 100 ways to solve the conversion problem, I am focusing on performance. Give that the string only contains binary data, what is the fastest method, in terms of performance, of converting that data to a byte[] (not char[]) under C#? Clarification: This is not ASCII data, rather binary data that happens to be in a string. 回答1: I'm not sure ASCIIEncoding.GetBytes is going to do it, because it only supports the range 0x0000 to 0x007F. You tell the string contains only bytes. But a

问题 i need to send video to webservice in .net, im send a string base64 encode, if the video its about 2MB or 6 o 7 seconds all its ok, but when is more heavy causes outofmemoryerror when i do Bas.encode[byte[]); This is my code: videoPath = getRealPathFromURI(fileUri); File tmpFile = new File(videoPath); in = null; in = new BufferedInputStream(new FileInputStream(tmpFile)); bos = new ByteArrayOutputStream(); long tamano = tmpFile.length(); int iTamano = (int) tamano; byte[] b = new byte[iTamano]

问题 I'm trying to find a more efficient method of reading a file from a remote URL and saving it into a byte array. Here is what I currently have: private byte[] fetchRemoteFile(String location) throws Exception { URL url = new URL(location); InputStream is = null; byte[] bytes = null; try { is = url.openStream (); bytes = IOUtils.toByteArray(is); } catch (IOException e) { //handle errors } finally { if (is != null) is.close(); } return bytes; } As you can see, I currently pass the URL into the

问题 This might be a silly question, but have not found a simple answer yet... I'm trying to insert a simple c# byte array into another byte array at a specific position. E.g. the existing bytes should be not be overridden, but just moved further back. Really just like you copy page some text block inside an existing text block. So far, I would create a new array with the length of both existing arrays. Copy the first array into the new one until the position where the insert starts. Add the

问题 I have an array of bytes consisting of 1024 elements. I want to break this down into different string private members (e.g. first 9 bytes for name, next 12 bytes for userID, etc.). Without having to turn the entire byte array into a string and then using a substring method, is there any way I can turn a range of bytes in the array directly into a private member for my class? E.g. myObject.name = byteArr[0-9]; myObject.userId = byteArr[10-21]; 回答1: Use: String myField = new String(myArray,

问题 OK - So I never seem to have a simple question. I have a custom library (which is not written by me) written in C++. This library does some network comms and I just pass some data to it as a byte array and retrieve a byte array from it on the other side. The library handles all the network stuff for me the sending/receiving of data to/from client/server. So for example, I can write a client and a server. From the client I produce a byte array, the library takes the byte array and sends it to

问题 I have a problem with getting parts of the ByteArray data. There is a binary text in fileData : var fileData:ByteArray = new ByteArray(); //..........here's code that fills this var with binary data .....readBytes(fileData,0,1000); // Data is like this: йYЯyeSВ–нkq(г<<<start>>>:xЪмЅdf”cйxЪsdfмЅ”cйdxЪмЅ”cй<<<end>>>В–нkВ So, I need to find position of <<< start >>> and <<< end >>> and copy data, that is between them. But searching fileData.toString().indexOf('<<< start >>>') sometimes gets