\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{Jianmin Feng (taotao)}
\pdfinfo{
  /Title (jsp.pdf)
  /Creator (Cheatography)
  /Author (Jianmin Feng (taotao))
  /Subject (Jsp Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{197008}
\definecolor{LightBackground}{HTML}{F7FAF7}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Jsp Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Jianmin Feng (taotao)} via \textcolor{DarkBackground}{\uline{cheatography.com/79308/cs/19748/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Jianmin Feng (taotao) \\
  \uline{cheatography.com/taotao} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 19th June, 2019.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{x{3.18528 cm} x{1.79172 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{J2EE structure}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{client: web browser} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
server: JSP/JServertlet & Tomcat \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Backend: database} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Eclispe & Server config \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{MVC: Struct, Spring, JSF} \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.34379 cm} x{3.63321 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{JSP fundamentals}}  \tn
% Row 0
\SetRowColor{LightBackground}
jsp \seqsplit{expression} & \textless{}\%= java statement \%\textgreater{} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
jsp scriptlet & \textless{}\%  unnonymous java blocks \%\textgreater{} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
jsp import & \textless{}\%@ page import= comma separated java import \%\textgreater{} \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
jsp \seqsplit{declaration} & \textless{}\%! named java blocks, ie methods \%\textgreater{} \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{call java class from jsp: avoid large chuck of java code (scriptlets or declarations) in jsp} \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{\textless{}jsp:include file="header.jsp" /\textgreater{}} \tn 
% Row Count 11 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{{\bf{jsp built-in objects}}} \tn 
% Row Count 12 (+ 1)
% Row 7
\SetRowColor{white}
request & http request header + form data \tn 
% Row Count 14 (+ 2)
% Row 8
\SetRowColor{LightBackground}
response & Http support for send reponse \tn 
% Row Count 15 (+ 1)
% Row 9
\SetRowColor{white}
out & jspWriter: include content in html \tn 
% Row Count 17 (+ 2)
% Row 10
\SetRowColor{LightBackground}
session & unique session for each user across different page \tn 
% Row Count 19 (+ 2)
% Row 11
\SetRowColor{white}
\seqsplit{application} & shared among users of web app \tn 
% Row Count 21 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Read html form in JSP}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textless{}form id="test" action ="student-response.jsp" method='post"\textgreater{} \newline   name: \textless{}input type="text" name="name"/\textgreater{} \newline  \newline   \textless{}input type="radio" name="isSophormore" value="Yes'\textgreater{} Yes \newline   \textless{}input type="radio" name="isSophormore" value="No'\textgreater{} No \newline  \newline   \textless{}input type="checkbox" name="language" value="Javascript"\textgreater{} Javascript \newline   \textless{}input type="checkbox" name="language" value="Java"\textgreater{} Java \newline   \textless{}input type="checkbox" name="language" value="SQL"\textgreater{} SQL \newline   \textless{}input type="checkbox" name="language" value="python"\textgreater{} Python \newline  \newline   \textless{}input type="submit" value="Submit"/\textgreater{} \newline \textless{}/form\textgreater{} \newline  \newline \textless{}select name="country" form="test"\textgreater{} \newline    \textless{}option value="China"\textgreater{} China \textless{}/option\textgreater{} \newline    \textless{}option value="US"\textgreater{} US \textless{}/option\textgreater{} \newline    \textless{}option value="Other"\textgreater{} Other \textless{}/option\textgreater{} \newline \textless{}/select\textgreater{} \newline  \newline in JSP \newline \$\{param.name\} \$\{param.country\} \newline \textless{}\%=request.getParameter("country")\%\textgreater{} \newline  \newline \textless{}ul\textgreater{} \newline \textless{}\% \newline     String {[}{]} \seqsplit{language=request.getParameterValues("language");} \newline     if (language !=null) \newline        for (String s:language) \newline           out.println("\textless{}li\textgreater{}"+s+"\textless{}/li\textgreater{}"); \newline \%\textgreater{} \newline \textless{}/ul\textgreater{}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Session -Cookies}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{Cookie api : javax.servlet.http;  \newline imported for all jsp implicitly \newline only send to specific server domain matched \newline  \newline \textless{}!-{}-send cookies to web browser -{}-\textgreater{} \newline \textless{}\% \newline String \seqsplit{favLang=request.getParameter("FavorateLanguage");} \newline Cookie the Cookie=new Cookie ("myApp.favorateLang",favLang); \newline theCookie.setMaxAge(606024*365); //default 30min \newline response.addCookie(theCookie); \newline \%\textgreater{} \newline  \newline cookies and session: \newline  \newline A cookie is a bit of data stored by the browser and sent to the server with every request. Cookies with no expiration time will be deleted after browser closed ( some browser).facility the session. \newline  \newline A session is a collection of data stored on the server and associated with a given user (usually via a cookie containing an id code); session deleted at reconnection to server, give http a state. \newline  \newline \textless{}!-{}-read cookies in web browser-{}-\textgreater{} \newline \textless{}\% \newline Cookie{[}{]} theCookies =request.getCookies(); \newline if (theCookies !=null) \{  \newline   for (Cookie tempCookie:theCookies)\{ \newline     if \seqsplit{("myApp.favorateLang".equals(tempCookie}.getName()))\{ \newline        \seqsplit{favLang=tempCookie.getValue();} \newline        break; \newline     \} \newline   \} \newline \} \newline \%\textgreater{}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.68758 cm} x{2.28942 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Session (copy)}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{unique for a user, share data across pages,like a shopping cart for a user} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{Kept in memory, each user has a session id} \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{session id (create, transfer ) is handled by browse automatically} \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{seesion.setAttribute("name"}, value) & \seqsplit{setAttribute(String}, Object) \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
(List\textless{}String\textgreater{} ) \seqsplit{seesion.getAttrribute("name")} & Object \seqsplit{getAttribute(String)} \tn 
% Row Count 10 (+ 3)
% Row 5
\SetRowColor{white}
session.isNew() & session.getId() \tn 
% Row Count 11 (+ 1)
% Row 6
\SetRowColor{LightBackground}
session.invalidate() & \seqsplit{session.setMaxInactiveInterval(ms)} \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{1. create form 2 check set session attribute 3 read from session} \tn 
% Row Count 15 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{to disable session: \%@ page session="false" \%\textgreater{}} \tn 
% Row Count 16 (+ 1)
% Row 9
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{PageContext} \tn 
% Row Count 17 (+ 1)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Cookie API in javax.servlet.http, imported implicitly for all jsp pages} \tn 
% Row Count 19 (+ 2)
% Row 11
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{Cookie(String name, String value);} \tn 
% Row Count 20 (+ 1)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Cookie the Cookie=new Cookie ("myApp.favorateLang",favLang)} \tn 
% Row Count 22 (+ 2)
% Row 13
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{theCookie.setMaxAge(60{\emph{60}}24*365); //default 30min} \tn 
% Row Count 23 (+ 1)
% Row 14
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\seqsplit{response.addCookie(theCookie);}} \tn 
% Row Count 24 (+ 1)
% Row 15
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{Cookie{[}{]} theCookies =request.getCookies();} \tn 
% Row Count 25 (+ 1)
% Row 16
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{if (theCookies !=null) \{ for (Cookie tempCookie:} \tn 
% Row Count 26 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{JDBC}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{install mysql, work bench + shell + demo data setup \newline  \newline setup tomcat 7.0: download tomcat 7, unzip to c:\textbackslash{} \newline  \newline setup connection pool: multiple users ( amazon) using the same db, need more connections, pool together to save resources ( not setup connection every time, preconfigured connect in the pool) \newline  \newline download jdbc mysql connector jar -\textgreater{} WebContent/WEB-INF/lib \newline define connection pool: \seqsplit{WebContent/META-INF/context}.xml \newline  \newline \textless{}Context\textgreater{} \newline   \textless{}Resource \seqsplit{name="jdbc/web\_student\_tracker"}  \newline     auth="Container" \seqsplit{type="javax.sql.DataSource"} \newline     maxActive="20" maxIdle="5" maxWait="10000" \newline     username="webstudent" password="webstudent"  \newline     \seqsplit{driverClassName="com.mysql.jdbc.Driver"} \newline     \seqsplit{url="jdbc:mysql://localhost:3306/web\_student\_tracker}?useSSL=false"/\textgreater{} \newline \textless{}/Context\textgreater{} \newline  \newline resource injection: tomcat automatically set the connection pool/ datasource on your servlet. \newline  \newline -{}-connector/J 8 \newline alter user 'webstudent'@'localhost' identified with mysql\_native\_password by 'webstudent';} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.4977 cm} p{0.4977 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{cache busting?}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{} \tn 
% Row Count 0 (+ 0)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\seqsplit{https://curtistimson.co.uk/post/front-end-dev/what-is-cache-busting/}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}