Pure JSP operation server text file (transfer)

xiaoxiao2021-03-06  90

File establishment / check and delete <% @ page contentty = "text / html; charset = GB2312"%> <% @ page import = "java.io. *"%> file Establish, check and delete </ title> </ head> <body> <% string path = request.getRealPath (""); // out.println (path); file f = new file (path, "file.txt "); // out.println (f); // out.println (f.exists ());</p> <p>IF (F.Exists ()) {// Check if file.txt exists in f.delete (); // Delete file.txt file out.println (Path "//file.txt exists, deleted."); } else {f.createNewFile (); // Create a file named file.txt in the current directory Out.println (Path "//file.txt does not exist,"); // Output is currently Directory path}%></p> <p>Contents of the catalog / check and deletion</p> <p><% @ Page ContentType = "Text / HTML; Charset = GB2312"%> <% @ page import = "java.io. *"%> <html> <head> <title> directory creation / check and deletion </ Title> </ head> <body> <% string path = request.getRealPath (""); path = path "// Sub"; // will be created directory path file d = new file (path); // Establish a File object representative of the SUB directory and get one reference IF (d.exists ()) {// check if the SUB directory exists (); out.println ("Sub directory, deleted"); } else {d.mkdir (); // Established subdirectory Out.println ("Sub directory does not exist, established");}%> </ body> </ html></p> <p>How to handle virtual directories in JSP</p> <p><% @ Page ContentType = "Text / HTML; Charset = GB2312"%> <% @ Page Import = "Java.io. *"%> <HTML> <HEAD> <Title> JSP How to Handle Virtual Directory </ Title > </ head> <body> Disk path to the virtual directory <br> WEB site main directory is <font color = # ff0000> <% = request.getRealPath ("/")%> </ font> < BR> JSP page location directory location <font color = # ff0000> <% = request.getRealPath ("./")" g et / </ / <上 上 "j j j 位置 目 位置 上 位置 上 位置 位置 位置# ff0000> <% = Request.getRealPath ("../")" "" "" "<br> </ body> </ html> file properties</p> <p><% @ Page ContentType = "Text / HTML; Charset = GB2312"%> <% @ page import = "java.util.date, java.io. *"%> <html> <head> <title> file properties Obtain </ Title> </ head> <body> <% string path = request.getRealPath ("/"); file f = new file (path, "readdata.txt"); if (f.exists ()) { %> <% = f.getName ()%> following properties: <br> <br> file length is:? <% = f.length ()%> <% = f.isFile () "is a file": "Not a file"%> <br> <% = f.Indirectory ()? "Is a directory": "Not a directory"%> <br> <% = f.canread ()? "Read": "Unreadable Take "%> <br> <% = f.canwrite ()?" Can be written ":" Not writable "%> <br> <% = f.ishidden ()?" Is a hidden file: "Not hidden File "%> <br> File's last modification date is: <% = new date (f.lastmodified ())%> <br> <%} else {f.createNewFile (); // Create one in the current directory a file named ReaData.txt%> <% = f.getName ()%> following properties: <br> <br> file length is: <% = f.length ()%> <% = f.isFile ( "Yes File": "Not the file"%> <br> <% = f.Indirectory ()? "" Is a directory ":" Not a directory "%> <br> <% = f.canread ()?" Read ":" Do not read "%> <br> <% = f.canwrite ()?" Write ":" Not Write "%> <br> <% = f.ishidden ()?" Hidden file ":" Not hidden file "%> <br> File last modification date is: <% = new date (f.lastmodified ())%> <br> <%}%> </ body> </ html > Method for removing files in the directory</p> <p><% @ Page ContentType = "Text / HTML; Charset = GB2312"%> <% @ page import = "java.io. *"%> <html> <head> <title> Remove the file in the directory - Column Files in the directory </ title> </ head> <body> <% string path = request.getRealPath ("/"); file d = new file (path); // Establish the file object file in the current directory. File. List [] = d.listfiles (); // acquire file object array of all files on behalf of the directory Out.println ("<font color = # ff0000>" PATH "directory: </ font> <br > "); for (int i = 0; i <list.Length; i ) {if (list [i] .isfile ()) {out.println (list [i] .Getname () " <br> " }}} Out.println ("<br> <font color = # ff0000>" "directory: </ font> <br>"); for (int i = 0; i <list. Length; i ) {if (list [i] .Indirectory ()) {out.println (list [i] .getname () "<br>");}}%> </ body> </ html> read Take all file data</p> <p><% @ Page ContentType = "Text / HTML; Charset = GB2312"%> <% @ page import = "java.io. *, java.lang. *"%> <html> <head> <title> Read all File Data </ ​​Title> </ head> <body> <% string path = request.getRealPath ("."); FileReader fr = new fileReader (Path "//ReadData.txt" );// The key lies in reading During the process, it is necessary to determine if the read characters have reached the end of the file, and this character is not a broken line in the file, ie it is determined whether the character value is 13. INT c = fr.read (); // reads a character // from the file to determine if the file ends are read, while (c! = - 1) {Out.print ((char) c); // Output Data c = fr.read (); // Continue to read data IF from the file (c == 13) {// Judgment whether it is a broken character out.print ("<br>"); // Output Branch Label fr.skip (1); // Skepts a character //c=fr.read();// read a character}} fr.close ();%> </ body> </ html></p></div><div class="text-center mt-3 text-grey"> 转载请注明原文地址:https://www.9cbs.com/read-123415.html</div><div class="plugin d-flex justify-content-center mt-3"></div><hr><div class="row"><div class="col-lg-12 text-muted mt-2"><i class="icon-tags mr-2"></i><span class="badge border border-secondary mr-2"><h2 class="h6 mb-0 small"><a class="text-secondary" href="tag-2.html">9cbs</a></h2></span></div></div></div></div><div class="card card-postlist border-white shadow"><div class="card-body"><div class="card-title"><div class="d-flex justify-content-between"><div><b>New Post</b>(<span class="posts">0</span>) </div><div></div></div></div><ul class="postlist list-unstyled"> </ul></div></div><div class="d-none threadlist"><input type="checkbox" name="modtid" value="123415" checked /></div></div></div></div></div><footer class="text-muted small bg-dark py-4 mt-3" id="footer"><div class="container"><div class="row"><div class="col">CopyRight © 2020 All Rights Reserved </div><div class="col text-right">Processed: <b>0.040</b>, SQL: <b>9</b></div></div></div></footer><script src="./lang/en-us/lang.js?2.2.0"></script><script src="view/js/jquery.min.js?2.2.0"></script><script src="view/js/popper.min.js?2.2.0"></script><script src="view/js/bootstrap.min.js?2.2.0"></script><script src="view/js/xiuno.js?2.2.0"></script><script src="view/js/bootstrap-plugin.js?2.2.0"></script><script src="view/js/async.min.js?2.2.0"></script><script src="view/js/form.js?2.2.0"></script><script> var debug = DEBUG = 0; var url_rewrite_on = 1; var url_path = './'; var forumarr = {"1":"Tech"}; var fid = 1; var uid = 0; var gid = 0; xn.options.water_image_url = 'view/img/water-small.png'; </script><script src="view/js/wellcms.js?2.2.0"></script><a class="scroll-to-top rounded" href="javascript:void(0);"><i class="icon-angle-up"></i></a><a class="scroll-to-bottom rounded" href="javascript:void(0);" style="display: inline;"><i class="icon-angle-down"></i></a></body></html><script> var forum_url = 'list-1.html'; var safe_token = 'MgOWHXiBwwX4brCzOTzaSvulphGcbkevyqysFbvBMkEBw0GvB79XvcgoW1hrxv2rG6D0Y9cQLYtxph4G0_2BbbgQ_3D_3D'; var body = $('body'); body.on('submit', '#form', function() { var jthis = $(this); var jsubmit = jthis.find('#submit'); jthis.reset(); jsubmit.button('loading'); var postdata = jthis.serializeObject(); $.xpost(jthis.attr('action'), postdata, function(code, message) { if(code == 0) { location.reload(); } else { $.alert(message); jsubmit.button('reset'); } }); return false; }); function resize_image() { var jmessagelist = $('div.message'); var first_width = jmessagelist.width(); jmessagelist.each(function() { var jdiv = $(this); var maxwidth = jdiv.attr('isfirst') ? first_width : jdiv.width(); var jmessage_width = Math.min(jdiv.width(), maxwidth); jdiv.find('img, embed, iframe, video').each(function() { var jimg = $(this); var img_width = this.org_width; var img_height = this.org_height; if(!img_width) { var img_width = jimg.attr('width'); var img_height = jimg.attr('height'); this.org_width = img_width; this.org_height = img_height; } if(img_width > jmessage_width) { if(this.tagName == 'IMG') { jimg.width(jmessage_width); jimg.css('height', 'auto'); jimg.css('cursor', 'pointer'); jimg.on('click', function() { }); } else { jimg.width(jmessage_width); var height = (img_height / img_width) * jimg.width(); jimg.height(height); } } }); }); } function resize_table() { $('div.message').each(function() { var jdiv = $(this); jdiv.find('table').addClass('table').wrap('<div class="table-responsive"></div>'); }); } $(function() { resize_image(); resize_table(); $(window).on('resize', resize_image); }); var jmessage = $('#message'); jmessage.on('focus', function() {if(jmessage.t) { clearTimeout(jmessage.t); jmessage.t = null; } jmessage.css('height', '6rem'); }); jmessage.on('blur', function() {jmessage.t = setTimeout(function() { jmessage.css('height', '2.5rem');}, 1000); }); $('#nav li[data-active="fid-1"]').addClass('active'); </script>