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The zlib module in Python is used to compress or decompress data for storage and transmission. It is the basis for other compression tools. Let's take a look at Python's method of compressing and decompressing strings and files using module zlib. If you don't say more, just look at the sample code. Example 1: compressing and decompressing strings Import zlib Message = ' abcd1234 ' compressed = zlib.compress (message) decompressed = zlib.decom

These two days in the project, do upload picture function piece, encounter two problems, one is how to get the path of the selected picture, one is how to compress the picture, after checking some information and read someone else to write after finally toss out, in this record.First of all, since we want to select pictures, we have to get all the pictures locally, and Android has encapsulated the intent for us.1 New null); // Select an item from the

the directory output.dir = ${output.temp.dir}_output #environment needs lib liblib = lib

Js uses Canvas to compress images, Recently, an APP project involves taking pictures on a mobile phone and uploading images. Because the pictures taken on a mobile phone are usually large, the upload process is slow. Therefore, image compression is required to optimize the upload function. The specific implementation is as follows: /** Image Compression * img original image * width compression width * height compression height * ratio compression rat

Author: ChingOriginal address: http://blog.csdn.net/qingdujun/article/details/39480117The size of the photo taken by the general camera is around 3-4m, where you need to compress the resulting photos by uploading them to the server function.Online search for a lot of information, know that you can use: Insamplesize set the scale of the picture.However, it is important to note:1) Injustdecodebounds = true; Need to be set to true first, indicating that

Zlib (http://zlib.net/) provides a simple and efficient in-memory data compression and decompression series of API functions, many applications will use this library, among them, compress and uncompress functions are the most basic and commonly used. However, although compress and uncompress functions are already very simple, they are still difficult to use. In fact, the final result is that some things are

/home/hadoop/hadoop-2.2.0/share/hadoop/common/hadoop-lzo-0.4.20-SNAPSHOT.jar and/home/hadoop/hadoop-2.2.0/lib/native/to all other hadoop nodes. Note: Make sure that the jar package under the directory/home/hadoop/hadoop-2.2.0/lib/native/has execution permissions for all users running hadoop. (6) Configure hadoop Append the following content to the file $ hadoop_home/etc/hadoop/hadoop-env.sh: Export LD_LIBRARY_PATH =/usr/local/hadoop/lzo/lib Append the following content to the file $ hadoop_home/

Below we together to see and an article about PHP BCD code compression-The decimal number compressed into hexadecimal data instances, I hope that the article to help you students oh. Example, PHP BCD compression-Compress decimal numbers into hexadecimal data The code is as follows Copy Code /*PHP BCD compression-Compress decimal numbers into hexadecimal dataFor example 0091

Php: how to compress the image size first, let's talk about our website. after the website is written in the background, the editors upload images as needed. many images are saved in the png format by default by QQ. The code for uploading images is written by a colleague who uses ueditor and does not control the upload size. my colleague resigned last week and handed over his work to me. In the morning, O M told me that our website occupies too much

If you delete data or objects in an Access database, an Access project, you can create fragmentation and reduce the efficiency of disk space usage. At the same time, the size of the database file does not decrease, but increases continuously until your hard disk has no space. Is there a good way to deal with it? In fact, you can compress the database in access to improve the performance of your Access database and Access project, which is essentially

The author is Weitong Lin. With pages include more and more Ajax functionalities,We may need to include multiple JavaScript files. This may effect the pagePerformance. Here are two utilities that can help us load page faster. 1. Compress JavaScript files: You can refer to Yui compressor for. Net (http://yuicompressor.codeplex.com/Wiki/View.aspx? Title = home) It can compress both

The following two methods are provided to compress and decompress files in C: Use the open-source sharpziplib. The following code uses sharpziplib for simple encapsulation of the compression and decompression class: /// /// Fileziplib compression, decompressed class /// Public class fileziplib { Public fileziplib (){} /// /// Create a compressed file/// /// /// Public static void packfiles (string zipfilename, string sourcedirectory){Fastzip FZ = new

Add reference icsharpcode. sharpziplib. dll View plaincopy to clipboardprint? Using system; Using system. Collections. Generic; Using system. IO; Using system. Threading; Using icsharpcode. sharpziplib. Zip; Namespace lib { /// /// File compression and decompression /// Public class filecompression { /// /// Constructor /// Public filecompression () { } # Region encryption and File compression /// /// Compressed file /// /// /// /// /// Public static void

Icsharpcode. sharpziplib. dll 1. compress the logs in a specified directory, compress the logs to the compressiondirectory folder, and clear the uncompressed logs. # Region: compresslogdic () {try {string logfilepath = appdomain. currentdomain. basedirectory + "logs"; directoryinfo logsdic = new directoryinfo (logfilepath); fileinfo [] biplog = logsdic. getfiles (); datetime dt = datetime. now; List 2. com

Using system;using system.collections.generic;using system.linq;using system.web;using System.Web.UI;using System.web.ui.webcontrols;using system.diagnostics;using System.io;public partial class zip:system.web.ui.page{prot ected void Page_Load (object sender, EventArgs e) {}//compressed file protected void Button1_Click (object sender, Eventa RGS e) {ProcessStartInfo startinfo = new ProcessStartInfo (); Process process = new process (); String rarname = "1.rar"; Compressed file nam

PackageCom.asia.test.TestZipFiles;ImportJava.io.BufferedInputStream;ImportJava.io.File;ImportJava.io.FileInputStream;ImportJava.io.FileOutputStream;Importjava.util.zip.CRC32;ImportJava.util.zip.CheckedOutputStream;ImportOrg.apache.tools.zip.ZipEntry;ImportOrg.apache.tools.zip.ZipOutputStream; Public classZipfiles { Public Static voidMain (String arg[]) {Compress ("E:\\test", "e:\\testzip\\");}Static Final intBUFFER = 2048; Public Static voidCompress (

Tar is commonly used on Linux packaging, compression, compression tools, he has a lot of parameters, folding only to enumerate the commonly used compression and decompression parametersParameters:-c:create set up the parameters of compressed archives;-X: Extracting parameters of compressed archives;-Z: Whether to use gzip compression;-V: Files are displayed during compression;-F: The top document name, immediately after F to answer the file name, can not add parametersExample: First, the entire/