Apr 20, 2011 · What does ${} means in JSP? For example, <c:if test="${!empty cookie.lang}"> <fmt:setLocale value="${cookie.lang.value}" /> </c:if>

当然了，如果Tomcat检测到JSP页面改动了的话，会重新编译的。 既然JSP是一个Servlet，那JSP页面中的HTML排版标签是怎么样被发送到浏览器的？我们来看下上面1_jsp.java的源码就知道了。原来就是用write()出去的罢了。说到底，JSP就是封装了Servlet的java程序罢了。

May 9, 2011 · If you want to do the following by using JSTL Tag Libe, please follow the following steps: [Requirement] if a number is a grater than equal 40 and lower than 50 then display "Two digit number starting with 4" otherwise "Other numbers".

Aug 8, 2018 · I have a JSP page used for editing some user's info. When a user logins to the website, I keep the information in the session, then in my edit page I try the following: <%!

May 25, 2020 · The JSP container translates a requested JSP into servlet code that is then compiled and immediately executed. Subsequent requests to the same page simply invoke the runtime servlet for the page. If a change is made to the JSP on the server, a request to view it triggers another translation, compilation, and restart of the runtime servlet.

Apr 26, 2010 · Pure JSP comments look like this: <%-- Comment --%> So if you want to retain the "=".you could do something like: <%--= map.size() --%> The key thing is that <%= defines the beginning of an expression, in which you can't leave the body empty, but you could do something like this instead if the pure JSP comment doesn't appeal to you:

Sep 18, 2017 · This was my first result in google for "redirect jsp". This is the correct answer for those people who came looking for how to always redirect one page to another (ex. to map /index.jsp -> /myapp/index.jsp, put this in to /index.jsp and make redirectURL = "/myapp/index.jsp"). Constantine is correct that this is a bad way to redirect a submit ...

Feb 2, 2012 · Then the source JSP page is converted into a java servlet class. The included file can be a static resource or a JSP page. Generally, JSP include directive is used to include header banners and footers. Syntax for include a jsp file: <%@ include file="relative url"> Example <%@include file="page_name.jsp" %>

Just noting this here in case anyone else has a similar issue. If you're directing a request directly to a JSP, using Apache Tomcat web.xml configuration, then ${requestScope.attr} doesn't seem to work, instead ${param.attr} contains the request attribute attr.

This seems bad as the URL people.htm is hardcoded in the JSP. There should be a way to have Spring automatically build the <a> tag using the URL defined in servlet.xml . Edit : Maybe I should be using a Spring form.