Java

public class TestFileMD5 { public final static String[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; /** * 获取文件的MD5值 * @param file * @return */ public static String getFileMD5(File file){ String md5 = null; FileInputStream fis = null; FileChannel fileChannel = null; try { fis = new FileInputStream(file); fileChannel = fis.getChannel(); MappedByteBuffer byteBuffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, file.length()); try { MessageDigest md = MessageDigest.getInstance('MD5'); md.update(byteBuffer); md5 = byteArrayToHexString(md.digest()); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }finally{ try { fileChannel.close(); fis.close(); } catch (IOException e) { e.printStackTrace(); } } return md5; } /** * 字节数组转十六进制字符串 * @param digest * @return */ private static String byteArrayToHexString(byte[] digest) { StringBuffer buffer = new StringBuffer(); for(int i=0; i<digest.length; i++){ buffer.append(byteToHexString(digest[i])); } return buffer.toString(); } /** * 字节转十六进制字符串 * @param b * @return */ private static String byteToHexString(byte b) { // int d1 = n/16; int d1 = (b&0xf0)>>4; // int d2 = n%16; int d2 = b&0xf; return hexDigits[d1] + hexDigits[d2]; } public static void main(String [] args) throws Exception{ System.out.println('-----测试创建文件的md5后缀----------'); File file = new File('/home/mignet/文档/projects/rustful/test.jpg'); if(!file.exists()){ file.createNewFile(); } //获取参数 String parent = file.getParent(); System.out.println(parent); String fileName = file.getName(); System.out.println(fileName); //首先获取文件的MD5 String md5 = getFileMD5(file); System.out.println('-----获取的md5：' + md5); //组装 File md5File = new File(parent + fileName +'.md5'); if(md5File.exists()){ md5File.delete(); md5File.createNewFile(); } FileOutputStream fos = new FileOutputStream(md5File); fos.write(md5.getBytes()); fos.flush(); fos.close(); System.out.println('--------完成---------'); } }

Rust(好吧,博客园当前还不支持Rust语言,语法高亮是错的,只看红字部分)

//Include macros to be able to use `insert_routes!`. #[macro_use] extern crate rustful; use rustful::{Server, Handler, Context, Response, TreeRouter}; //Test Image And ImageHash extern crate image; extern crate crypto; use crypto::md5::Md5; use crypto::digest::Digest; use std::char; use std::path::Path; use std::os; use std::io; use std::io::prelude::*; use std::fs::File; use std::io::BufReader; use image::GenericImage; #[macro_use] extern crate log; extern crate env_logger; use std::error::Error; struct Greeting(&'static str); impl Handler for Greeting { fn handle_request(&self, context: Context, response: Response) { //Check if the client accessed /hello/:name or /good_bye/:name if let Some(name) = context.variables.get('name') { //Use the value of :name response.send(format!('{}, {}', self.0, name)); } else { response.send(self.0); } } } fn main() { env_logger::init().unwrap(); let img = image::open(&Path::new('test.jpg')).unwrap(); let image2 = image::open(&Path::new('73daacfab6ae5784b9463333f098650b.jpg')).unwrap(); // The dimensions method returns the images width and height println!('dimensions {:?}', img.dimensions()); let (width, height) = img.dimensions(); //caculate md5 for file let mut f = File::open('/home/mignet/文档/projects/rustful/test.jpg').unwrap(); let mut buffer = Vec::new(); // read the whole file f.read_to_end(&mut buffer).unwrap(); let mut hasher = Md5::new(); hasher.input(&buffer); println!('{}', hasher.result_str()); // The color method returns the image's ColorType println!('ColorType:{:?}', img.color()); //Build and run the server. let server_result = Server { //Turn a port number into an IPV4 host address (0.0.0.0:8080 in this case). host: 8080.into(), //Create a TreeRouter and fill it with handlers. handlers: insert_routes!{ TreeRouter::new() => { //Receive GET requests to /hello and /hello/:name 'hello' => { Get: Greeting('hello'), ':name' => Get: Greeting('hello') }, //Receive GET requests to /good_bye and /good_bye/:name 'good_bye' => { Get: Greeting('good bye'), ':name' => Get: Greeting('good bye') }, '/' => { //Handle requests for root... Get: Greeting('Welcome to Rustful!') // ':name' => Get: Greeting('404 not found:') } } }, //Use default values for everything else. ..Server::default() }.run(); match server_result { Ok(_server) => {println!('server is running:{}','0.0.0.0:8080');}, Err(e) => println!('could not start server: {}', e.description()) } }