JavaJSP Learning Series (MySQL Turn Page Example)

zhaozj2021-02-16  50

First, prepare the mysql JDBC driver before running (a JAR file) and load one of the ClassPath (see "Java / JSP learning series (JDK installation)") (If you can't find it, please download from this site) There is a table in a mysql database Test database: Note, field is: Name (varchar) two, download, installation <% @ page contenttype = "text / html; charset = GB2312"%> <% java.sql.connection sqlcon; // Database connection object java.sql.Statement SQLSTMT; // SQL statement object java.sql.resultset Sqlrst; // Result set object java.lang.string strcon; // database connection string java.lang.String strsql; / / SQL statement int intebitSize; // One page displayed record number int intert ost; // record total int INT INT INT INT INT INTPAGE; / / Terminal code Java.lang.String strpage; int i; // A page displayed INTPAGESIZE = 2; // acquire the page number strpage = request.getParameter ("page"); if (strpage == null) {// Indicates that there is no Page in querystring, display First page Data INTPAGE = 1;} ELSE {// Convert cell string to integer = java.lang.integer.parseint (strpage); if (INTPAGE <1) INTPAGE = 1;} // Load JDBC driver Class.Forname ("org.gjt.mm.mysql.driver"). NewInstance (); // Connect database SQLCON = java.sql.driverManager.getConnection ("JDBC: MySQL: // localhost / test"); //// Create a statement object SQLSTMT = Sqlcon.createStatement (java.sql.resultset.type_scroll_insensitive, Java.sql.resultSet.concur_read_only); // Execute SQL statement strsql = "select name from note"; // execute SQL statement and get results set sqlrst = sqlstmt.executeQuery (strsql); // Get record total SQLRST.last ( ); introwcount = sqlrst.getrow (); // Mode total page INTPAGECOUNT = (Introwcount INTPAGESIZE-1) / INTPAGESIZE; / / Adjust the page number IF (INTPAGE> INTPAGECUNT) INTPAGE = INTPAGECUNT;%> JSP database operation routine - Data page display - JDBC 2.0 - mysql </ title> </ Head> <body> <Table Border = "</p> <p>1 "Cellspacing =" 0 "cellpadding =" 0 "> <tr> <TH> Name </ tH> </ tr> <% if (INTPAGECUNT> 0) {// Position the record pointer to the first Sqlrst.absolute (INTPAGE-1) * INTPAGESIZE 1); // Display Data I = 0; While (I <INTPAGESIZE &&! SQLRST.ISAFTERLAST ()) {%> <TR> <TD> <% = SQLRST.GETSTRING (1)%> </ td> </ tr> <% sqlrst.next (); i ;}}%> </ table> No. <% = INTPAGE%> page A total of <% = INTPAGECOUNT%> Page <% IF (INTPAGE <INTPAGECUNT) {%> <a href="mysqlpage.jsp?page=<%=INTPAGE 1 %> "> Next Page </A> <%}%> <% IF (INTPAGE > 1) {%> <a href="mysqlpage.jsp?page=<%=intpage 1%> <Previous </a> <%}%> </ body> </ html> <% / / Close result set sqlrst.close (); // Turn off SQL statement object sqlstmt.close (); // Turn off database SQLCON.CLOSE ();%> 3, how to run? See the "Java / JSP Learning Series" five (JDBC-ODBC floppage example).</p></div><div class="text-center mt-3 text-grey"> 转载请注明原文地址:https://www.9cbs.com/read-19791.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="19791" 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>0.038</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 = 'NgoJOASjcBVUD94OIDGb4B4RoXYJ4WycypjWd5RDiXb8C3RT4UhlnXSJQmZOGJKXQTIoFqIhqBR2J1bMKfkcZg_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>