The HTTP request is divided into two types, get, and post, in the servlet, there is a doget () and dopost () method, the service () method is used to be responsible for the dispatch of these two methods.
* Environment configuration required to run servlet
The servlet container, which is used here is Apache Tomcat4.0.3, JDK1.4.2. When compiled, servlet. *, Servlet.http. * Can't find it, then copy the tomcat directory /common/lib/servlet.jar to JDK directory / jre / lib / ext, and in ClassPath You can register.
* The easiest servlet // hello.javaimport java.io. *; Import javax.servlet. *; Import javax.servlet.http. *;
public class Hello extends HttpServlet {public void doGet (HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException {res.setContentType ( "text / html"); PrintWriter out = req.getWriter (); out.println ( "" ); Out.println ("
Hello </ Title> </ head>"); out.println ("<body> <h1> hello </ h1> </ body>"); OUT. Println ("</ html>");}}</p>
<p>Web.xml Description: <web-app> <servlet> <servlet-name> Hello </ servlet-name> <servlet-class> Hello </ servlet-class> </ servlet> <servlet-maping> <servlet-name > Hello </ server-name> <url-pattern> / servlet / hello </ url-pattern> </ servlet-maping> </ web-app> Note: The order in which elements in web.xml do not write wrong .web. XML is placed under the web-inflicity, and the class file is placed under Web-INF / CLASSES.</p>
<p>* The above servlet can only receive the GET request, add the receiving POST request function // Add the following method public dopost (httpservletRequest Req, httpservletRequest Req, httpservletResponse res) throws ioException, servletexception {doget (REQ, RES); // Call doget method}</p></div><div class="text-center mt-3 text-grey">
转载请注明原文地址:https://www.9cbs.com/read-128906.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="128906" 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>0.048</b>, SQL:
<b>12</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 = 'RTy7nNmPiItSW5hCuU9z9EMDWVf9DrsNA5fmA853BojydSDl3NTrZGBlU2_2FHR01PUKA7fpdl83swd2queqYzow_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>
