Tomcat + JSP Access MySQL5. * Database

xiaoxiao2021-04-08  469

Tomcat JSP to access the mysql database:

1. Install the Tomcat and MySqlshuu to download mysql-connector-java.zip, then decompress two files, I download my mysql-connection-java-5.0.0-beta, so two files are mysql-connector-java -5.0.0-beta-bin.jar and mysql-connector-java-5.0.0-beta-bin-g.jar;

2. Copy mysql-connector-java-5.0.0-beta-bin.jar to the Apache-Tomcat / Common / Lib directory, restart Tomcat;

3, write a JSP file, such as Test.jsp:

<% @ Page Import = "java.io. *"%> <% @ page import = "java.util. *"%> <% @ page import = "java.sql. *"%> <% @ page contenttype = "text / html; charSet = GB2312"%>

dbjsp.jsp </ title> </ head> <body> <% connection con; statement stmt; resultset rs;</p> <p>Class.Forname ("com.mysql.jdbc.driver"); //class.forname ("org.gjt.mm.mysql.driver "). NewInstance ();</p> <p>DriverManager.registerDriver (new com.mysql.jdbc.Driver ()); String dbUrl = "jdbc: mysql: // localhost:? 3306 / BookDB userUnicode = true & characterEncoding = GB2312"; String dbUser = "user"; String dbPwd = " 123456 "; con = java.sql.driverManager.getConnection (DBURL, DBUSER, DBPWD); stmt = con.createstatement (); rs = stmt.executeQuery (" Select ID, Name, Title, Price from Books "); OUT. Println ("<Table Border Width = 400>); while (rs.next ()) {string col1 = rs.getstring (1); string col2 = rs.getstring (" name "); string col3 = rs.getstring (3); string col4 = rs.getstring (4);</p> <p>Out.println ("<TD>" COL1 "</ TD> <TD>" COL2 "</ TD> <TD>" COL3 "</ TD> <TD>" COL4 "</ td> </ tr>");} out.println ("</ Table>"); rs.close (); stmt.close () ;con.close ();%> </ body> </ html></p> <p>4, establish myApp in the apache-tomcat / webapps / directory, store the JSP file in myApp directory; access LocalHost: 8080 / myapp / test.jsp, information display, OK.</p></div><div class="text-center mt-3 text-grey"> 转载请注明原文地址:https://www.9cbs.com/read-132840.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="132840" 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>0.033</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 = 'ZiftDEA3NHbnY8NnssyH2ldaNtzgIOqrSWd2Ym3IcVBpaFEdFNoau3tLopco6qq6i4sqUTopSNitUzB1pfeh5w_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>