<% @ page import="com. Alex. DBC. DatabaseConnection" % & gt;
<% @ page import="Java. SQL. *" % & gt;
<% @ page import="Java. Util. ArrayList" % & gt;
<% @ page contentType="text/HTML. Charset=utf-8 "language=" Java "% & gt;
$Title $& lt;/title> <br/></head> <br/><body> <br/><% <br/>ArrayList<String> ArrayList=new ArrayList<String> (a); <br/>Try {<br/>The Statement Statement=DatabaseConnection. GetConnection (). CreateStatement (); <br/>String SQL="SELECT * FROM the userinfo"; <br/>The ResultSet res=statement. ExecuteQuery (SQL); <br/>System. Out.println (" executing the try block... "); <br/>While (res), next ()) {<br/>System. Out.println (" [" + res. Get string (1) + "] get the from while... "); <br/>ArrayList. Add (res) get string (1)); <br/>}<br/>} the catch (Exception e) {<br/>e.printStackTrace(); <br/>} the finally {<br/>DatabaseConnection. Close (); <br/>}<br/>For (String s: arrayList) {<br/>Out.println (s); <br/>}<br/>Out.println (arrayList. The size ()); <br/>% & gt; <br/></body> <br/></html> <br/></pre> <br/>In the console output <br/><img SRC="https://img.codepudding.com/202101/181016110048351.png" Alt=""/> <br/>In the browser to display <br/><img SRC="https://img.codepudding.com/202101/181016110048352.png" Alt=""/> <br/>I want to ask why is Tomcat9, will perform so many times? </div> <div class="th_page th_page_color"></div> <div class="umCopyright"> <p>Page link：<a href="/Backend/98182.html" target="_blank" style="color:#999">https//www.codepudding.com/Backend/98182.html</a></p> </div> <div class="detail-arr"> <div class="detail-arr-left">Prev:<a href='/Backend/98181.html'>Springboot custom annotations and @ valid annotations, why @ valid perform first?</a></div> <div class="detail-arr-right">Next:<a href='/Backend/98237.html'>Weblogic12C launched an error</a></div> </div> </div> </div> </div> </div> <div class="container th_top"> <div class="row"> <div class="col-md-12"> <div class="hot-tags neitags"> <ul> <li><i class="iconfont icon-x-tags"></i> Tags： </li> <a href='/e/tags/?tagname=Web+development' target='_blank'>Web development</a> </ul> </div> </div> </div> </div> <div class="container th_top"> <div class="row"> <div class="col-md-12"> <div class="xiangguan"> <ul class="msg msghead"> <li class="tbname">Related</li> </ul> <ul> </ul> </div> </div> </div> </div> <div class="container th_top"> <div class="row"> <div class="col-md-12"> <div class="flinks"> <ul> <li><i class="iconfont icon-x-tags"></i> Links： </li> <li class="liflinks"><a target="_blank" href="/" title="CodePudding">CodePudding</a></li> </ul> </div> </div> </div> </div> <div class="footer"> <p><span style="font-size:16px;color:#666;font-weight: bold">About Us:</span> <a href="https://www.codepudding.com/contact.html">Contact Us</a> <a href="https://www.codepudding.com/service.html">Terms of Service</a> <a href="https://www.codepudding.com/privacy.html"> Privacy Policy</a></p> <p class="foot_info">Copyright © 2010-2023，Powered By <a href="/" target="_blank">CodePudding</a> </p> </div> <script type="text/javascript" src="/skin/code/tianhu.js"></script> </body></html>
