Calculate the MD5 value of a file (Java & Rust)

Java

 Public classTestFileMD5 { Public Final StaticString[] hexdigits = {"0", "1", "2", "3", "4", "5",        "6", "7", "8", "9", "a", "B", "C", "D", "E", "F" }; /*** Get the MD5 value of the file *@paramfile *@return     */     Public Staticstring getFileMD5 (file file) {string MD5=NULL; FileInputStream FIS=NULL; FileChannel FileChannel=NULL; Try{FIS=Newfileinputstream (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 (); }        }                returnMD5; }        /*** byte array to hexadecimal string *@paramDigest *@return     */    Private StaticString bytearraytohexstring (byte[] Digest) {StringBuffer buffer=NewStringBuffer ();  for(inti=0; i<digest.length; i++) {buffer.append (bytetohexstring (digest[i)); }        returnbuffer.tostring (); }        /*** Byte to hexadecimal string *@paramb *@return     */    Private StaticString bytetohexstring (byteb) {//int d1 = N/16;             intD1 = (b&0xf0) >>4; //int d2 = n%16;             intD2 = b&0xf; returnHEXDIGITS[D1] +HEXDIGITS[D2]; }         Public Static voidMain (String [] args)throwsexception{System.out.println ("-----The MD5 suffix of the created file----------"); File File=NewFile ("/home/mignet/document/projects/rustful/test.jpg"); if(!file.exists ())        {File.createnewfile (); }        //Get ParametersString parent =file.getparent ();        SYSTEM.OUT.PRINTLN (parent); String FileName=File.getname ();        System.out.println (FileName); //first get the MD5 of the fileString MD5 =getFileMD5 (file); SYSTEM.OUT.PRINTLN ("-----Gets the MD5:" +MD5); //AssemblyFile Md5file =NewFile (parent + FileName + ". MD5"); if(Md5file.exists ()) {md5file.delete ();        Md5file.createnewfile (); } FileOutputStream Fos=NewFileOutputStream (Md5file);                Fos.write (Md5.getbytes ());        Fos.flush ();                Fos.close (); System.out.println ("--------Complete---------"); }}

Rust (well, the blog Park does not currently support the Rust language, syntax highlighting is wrong, just look at the Scarlet Letter part)

//Include macros to is able to use ' insert_routes! '.#[Macro_use]extern crate Rustful;use rustful::{server, Handler, Context, Response, treerouter};//Test Image and Imagehashextern crate Image; extern crate Crypto; Use crypto::md5::md5;use crypto::d igest::D igest; Use Std::char;use std::p ath::P ath;use std::os;use std::io;use std::io::p relude::*; 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 forGreeting {fn Handle_request (&Self , context:context, Response:response) {        CheckifThe client Accessed/hello/:nameor/good_bye/: NameifLet 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 andHeight println! ("dimensions {:?}", Img.dimensions ()); Let (width, height)=img.dimensions (); //caculate MD5 for file let mut f = File::open ("/home/mignet/document/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 ColorTypeprintln! ("colortype:{:?}", Img.color ()); Build andrun the server. Let Server_result=Server {Turn a port number into an IPV4 host address (0.0.0.0:8080inchThis case ). Host:8080. into (),Create a Treerouter andfill 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 forroot ... Get:greeting ("Welcome to rustful!")                    //": Name"= Get:greeting ("404 Not Found:")                }            }        },        Use default values forEverythingElse. ..    Server::d efault ()}.run (); Match Server_result {Ok (_server)= = {println! ("server is running:{}","0.0.0.0:8080");}, ERR (e)= println! ("could not start server: {}", E.description ())}}

Calculate the MD5 value of a file (Java & Rust)