[Source code] package download algorithm and data structure demo Animation

It was very early to learn the data structure. The demo animation is collected. Help understanding. But not all. Read KMP todayAlgorithm. I saw a high-quality course from Fuzhou University .. 81 demo animations .. You want to package, download, and add to favorites. It is said that Fuzhou University is a good choice. Perform academic work in a down-to-earth manner.

The first method is manual .. Ga. Do you dare. Download one by one... Change names one by one ..

The second is the software downloaded from the entire site .. But I read the SWF name. I know that downloading is of little significance. Because the name is hard to understand.

The third is to write one by yourself.ProgramRight ..

 

The overall idea is to first access the course page, parse the title and content of each chapter, create a chapter folder, get the HTML page corresponding to each animation, and then parse the HTML page, extract the SWF address. Then download it.

The pain point is that the page uses gb2312 encoding. The parsing artifact htmlagilitypack cannot specify the encoding. You can only find a way to bypass it.

WebClient client =NewWebClient (); memorystream MS=NewMemorystream (client. downloaddata (URL); htmldocument Doc=NewHTML document (); Doc. Load (MS, encoding. getencoding ("Gb2312"));
 

 

The bypass method is to first use the built-in class to get the memory stream. Then load from the memory.

Then. The technology involved is XPath. See the XPath document. We have done a lot. Another thing in the middle is that I did not pay attention to it. This page has two files with the same name .. After debugging several times, you can find out ..

 Using  System;  Using  System. Collections. Generic; Using  System. LINQ;  Using  System. text;  Using  Htmlagilitypack;  Using  System. IO;  Using  System. Threading;  Using  System. net;  Namespace  Fzuswf {  Class  Program { Static   Void Main ( String  [] ARGs) {dowork ();}  //  Execute task          Static   Void  Dowork () {htmlweb Web = New  Htmlweb (); htmldocument Doc = Web. Load ( "  Http://ds.fzu.edu.cn/fine/resources/  " ); Htmlnode divresource = Doc. getelementbyid ( "  Divresource  "  );  Foreach (Htmlnode child In  Divresource. childnodes ){  If (Child. Name = "  Table  "  ) {Htmlnode ptile = Child. selectsinglenode ("  Tr [1]  "  ); Directory. createdirectory (ptile. innertext. Trim ());  Int I = 0  ; Htmlnodecollection pcontents = Child. selectnodes ( "  Tr [position ()> 1]  "  ); Console. writeline (ptile. innertext. Trim ());  Foreach (Htmlnode oneIn  Pcontents ){  String Link = one. selectsinglenode ( "  ./TD [1]/P [1]/A [@ href]  " ). Attributes [ "  Href  "  ]. Value; Link = @"  Http://ds.fzu.edu.cn/fine/resources/  " +Link;  String  Filename; filename = One. innertext. Trim ();  If (One. innertext. Trim () = "  Sequential storage representation of Binary Trees  "  ) {Filename + = I; I ++ ;}  String Swflink = Getswfname (Link); console. writeline (  "  --  " + Filename + Swflink); downswf (swflink, ptile. innertext. Trim () + @"  /  " + Filename + "  . SWF  "  ); Thread. Sleep (  1000 );}}}}  //  Download the specified SWF          Static   Void Downswf ( String URL, String  Desname) {URI u = New  Uri (URL); WebClient mywebclient = New  WebClient (); mywebclient. downloadfileasync (u, desname );} //  Obtains the SWF name of the specified page.          Static   String Getswfname ( String  URL) {WebClient Client = New  WebClient (); memorystream MS = New  Memorystream (client. downloaddata (URL); htmldocument Doc = New  HTML document (); Doc. Load (MS, encoding. getencoding (  " Gb2312  "  ); Htmlnode HD = Doc. documentnode;  String STR = HD. selectsinglenode ( "  // A [@ href]  " ). Attributes [ "  Href  "  ]. Value;  Return   @" Http://ds.fzu.edu.cn/fine/resources/  " + STR ;}}} 

 

 

Run after writing. Look at the following interface .. This is just to show me the progress. At the same time, the background is also being downloaded.

After running. The folder and file names are automatically named ..

 

: Package animation demo download

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