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Roxanne Richard
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8 ( >.// )>#&doget() dopost() HttpServlet " (service()$ 5( + 8.' ,89,# >.// )EHttpRequest! < ) 2 &! 9, < getparametervalues(string name) getremotehost() getservername(),$

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10 :;,89 + 4) doget().". 4) doget() ) 8< HttpServletRequest HttpServletResponse,+ & public class HelloServlet extends javax.servlet.http.httpservlet { public void doget( javax.servlet.http.httpservletrequest req, javax.servlet.http.httpservletresponse res ) throws java.io.ioexception{ res.setcontenttype("text/html"); java.io.printwriter out = res.getwriter(); out.println ("<html>"); out.println ("<BODY>"); out.println ("Hello World!"); out.println ("</BODY>"); out.println ("</HTML>");

11 / ( HelloWorld 8 HttpServletRequest 9 BdoPost()< <HTML> <BODY> <FORM METHOD=POST ACTION=" Please enter your name. Thank you. <INPUT TYPE=TEXT NAME="firstName"> <P> <INPUT TYPE=SUBMIT> </FORM> </BODY> </HTML>, / import java.io.*; import javax.servlet.http.*; public class NewHelloServlet extends HttpServlet { public void dopost( HttpServletRequest req, HttpServletResponse res ) throws IOException{ res.setcontenttype("text/html"); PrintWriter out = res.getwriter(); out.println ("<html>"); out.println ("<BODY>"); String name = req.getparameter("firstname"); if (name.length() > 0) out.println ("Hello: " + Name + " How are you?"); else out.println ("Hello Anonymous!"); out.println ("</BODY></HTML>");

12 " > 9 A < + 6!# &$ = '@ 6!$ 4) 6!!)" 6! setstatus() +"< public void dopost( HttpServletRequest req, HttpServletResponse res) throws IOException{ res.setstatus(sc_moved_temporarily); // send response body if necessary!

13 # ' HttpServletResponse -9 "< Content-Type setcontenttype() ) setheader() 1 )(! 9! B public void dopost( HttpServletRequest req, HttpServletResponse res) throws IOException{ res.setcontenttype("text/html"); // # :; = ) 9!getOutputStream() 5getWriter() ) 9! * setcontenttype() + image/gif : + = $

14 $ A 2'! ' # & ' ) A Cookie() '$ addcookie() HttpServletResponse '! getcookies() )E' Cookie mycookie = new Cookie("Me", "123"); res.addcookie(mycookie); Cookie[] cookies = req.getcookies(); if (cookies!= null) { String readvalue; for (int I = 0; I < cookies.length; I++) readvalue = cookies[i].getvalue();... (

15 3". 5 G= 8 HelloServlet ; 9 8 =! ; 9 doget() dopost() =! + *+, : 6 HB1I +J J )JJ )J"E J @)J"J4+?'1*J 4) ( #4& F - ) >4)! " K(<JJ(<LMLMJ "('D #HB1I +J@)J J "(& : K(<JJ(<LMLMJ'J "('D HB1I +J@)J'J "(

16 &?*-! ) 4) -() ) - A 4) "-/# 0 & & " 12 #B$!$ $& - #/& 2 4) ( 4 6, >@?*- : 6 ( #H& & 9! -$- $ 12 /& 3 2 / ) HJ4+?'1*JJ - < $/$ 0 HJ4+?'1*J )J 45 )2 # 2 /2 ( &

17 ' -.+! /0 1+2 <?xml version="1.0" encoding="iso "?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" " <web-app> <servlet> <servlet-name>hi</servlet-name> <servlet-class>helloservlet</servlet-class> </servlet> <servlet> <servlet-name>login</servlet-name> <servlet-class>loginservlet</servlet-class> <init-param> <param-name>admin </param-name> </init-param> </servlet> </web-app> <!! import javax.servlet.*; import java.io.ioexception; public class ReserveConfigServlet implements Servlet { ServletConfig servletconfig; public void init(servletconfig config) throws ServletException { servletconfig = config; public void destroy() { public void service(servletrequest req, ServletResponse res) throws ServletException, IOException { public String getservletinfo() { return null; public ServletConfig getservletconfig() { return servletconfig;!

18 ( <!! public void service(servletrequest req, ServletResponse res) throws ServletException, IOException { ServletContext servletcontext = servletconfig.getservletcontext(); Enumeration attributes = servletcontext.getattributenames(); while (attributes.hasmoreelements()) { String attribute = (String) attributes.nextelement(); System.out.println("Attribute name : " + attribute); System.out.println("Attribute value : " + servletcontext.getattribute(attribute)); System.out.println("Major version: " + servletcontext.getmajorversion()); System.out.println("Minor version: " + servletcontext.getminorversion()); System.out.println("Server info: " + servletcontext.getserverinfo()); # 345!, import javax.servlet.*; import java.io.*; public class SingleThreadedServlet extends GenericServlet implements SingleThreadModel { public void service(servletrequest request, ServletResponse response) throws ServletException, IOException { int counter = 0; // get saved value try { BufferedReader reader = new BufferedReader( new FileReader("counter.txt")); counter = Integer.parseInt( reader.readline() ); reader.close(); catch (Exception e) { $

19 ) 345!,/"2 // increment counter counter++; // save new value try { BufferedWriter writer = new BufferedWriter( new FileWriter("counter.txt")); writer.write(integer.tostring(counter)); writer.close(); catch (Exception e) { try { PrintWriter out = response.getwriter(); out.println("you are visitor number " + counter); catch (Exception e) { * NO! 9 )EHttpServletRequest HttpServletRespost +" 5!< 5 2 web.xml!<filter>!<filer-mapping> 9 (

20 " 2( import java.io.ioexception; import javax.servlet.filter; import javax.servlet.filterchain; import javax.servlet.filterconfig; import javax.servlet.servletexception; import javax.servlet.servletrequest; import javax.servlet.servletresponse; public class BasicFilter implements Filter { private FilterConfig filterconfig; public void init(filterconfig filterconfig) throws ServletException { System.out.println("Filter initialized"); this.filterconfig = filterconfig public void destroy() { System.out.println("Filter destroyed"); this.filterconfig = null; public void dofilter(servletrequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { System.out.println("doFilter"); chain.dofilter(req, res); + -.+! <?xml version="1.0" encoding="iso "?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" " <web-app>  <filter> <filter-name> Basic Filter </filter-name> <filter-class> BasicFilter </filter-class> </filter>!

21 " -.+! /"2  <filter-mapping> <filter-name> Basic Filter </filter-name> <servlet-name> FilteredServlet </servlet-name> </filter-mapping> <listener> <listener-class> SessionLifeCycleEventDemo </listener-class> </listener> <servlet> <servlet-name> FilteredServlet </servlet-name> <servlet-class> FilteredServlet </servlet-class> </servlet> </web-app>!, public class ResponseFilter implements Filter { private FilterConfig filterconfig = null; public void destroy() { System.out.println("Filter destroyed"); this.filterconfig = null; public void dofilter(servletrequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { System.out.println("doFilter"); PrintWriter out = response.getwriter(); // this is added to the beginning of the PrintWriter out.println("<html>"); out.println("<body>"); out.println("<center>"); out.println("page header"); out.println("<hr>"); chain.dofilter(request, response); // this is added to the end of the PrintWriter out.println("<hr>"); out.println("page footer"); out.println("<center>"); out.println("</body>"); out.println("</html>"); public void init(filterconfig filterconfig) throws ServletException { System.out.println("Filter initialized"); this.filterconfig = filterconfig;!

22 "" / 2) < 2 ) 5 ' 7 G$< B! 9 -!3 3 <!! + 6!! / 1doGet()$-)!" E" 3" 3IOException ServletException 1"#"$ InterruptedException& < F )! ">!! - )UnavailableException " 3 ("!!

23 "# - *< Servlet# P& init(servletconf config) Q ( service(servletrequest req, ServletResponse resp)q 5 ServletConfig# P& getinitparameter(string name) Q 8 ServletContext# P& getserverinfo() Q 9 log() Q!E ServletRequest ServletResponse!# - *< GenericServlet# P& ServletConfig ))' service() getservletinfo() ServletInputStream# P& readline(byte[] b, int off, int len) Qoff$ Alen \n; = -1#eostream& ServletOuputStream# P& print(int i) Q print(string s) Q!$

24 "$ - *< HttpServlet# P&.M +genericservlet ))' doget() dopost() service(httpservletrequest req, HttpServletResponse res) Q ' #! 2& HttpServletRequest# P& +ServletRequest getheader(string name) Q ( getremoteuser() Q 55 HttpServletResponse# P& HttpUtils# P&!

Java Enterprise Edition. Java EE Oct Dec 2016 EFREI/M1 Jacques André Augustin Page 1

Java Enterprise Edition. Java EE Oct Dec 2016 EFREI/M1 Jacques André Augustin Page 1 Java Enterprise Edition Java EE Oct Dec 2016 EFREI/M1 Jacques André Augustin Page 1 Java Beans Java EE Oct Dec 2016 EFREI/M1 Jacques André Augustin Page 2 Java Bean POJO class : private Attributes public