HighLight.java import java.io.bufferedreader; import java.io.file; import java.io.fileinputstream; import java.io.ioexception; import java.io.inputstr

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なおちかじゅふく
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1 2 GET POST Servlet Servlet Servlet CGI/Servlet GET POST 2 GET URL? FORM GET : POST HTML HTML : Aisatsu.html HTML <form action= Aisatsu method= post > <br/> <input type= text size= 10 name= family /> <input type= text size= 10 name= given /> <br/> <input type= submit value= /> </form> form action URL Aisatsu 2.1 Servlet GET GET : Servlet HighLight.java II 2 p.1

2 HighLight.java import java.io.bufferedreader; import java.io.file; import java.io.fileinputstream; import java.io.ioexception; import java.io.inputstreamreader; import java.io.printwriter; import javax.servlet.http.httpservlet; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; public class HighLight extends HttpServlet public void doget(httpservletrequest request, HttpServletResponse response) throws IOException { response.setcontenttype("text/html; charset=windows-31j"); PrintWriter out = response.getwriter(); out.println("<html><head></head><body><pre>"); // Java HighLight.java // WEB Tekito.java File f = new File(getServletContext().getRealPath("/Tekito.java")); String word = request.getquerystring(); InputStreamReader fr = new InputStreamReader (new FileInputStream(f), "Windows-31J"); BufferedReader in = new BufferedReader(fr); while(true) { String line = in.readline(); if (line==null) break; line = line.replace("&", "&"); line = line.replace("<", "<") line = line.replace(">", ">"); if (word!=null && word.length()!=0) { line = line.replace(word, "<font color= red >"+word+"</font>"); out.println(line); out.println("</pre></body></html>"); out.close(); GET Servlet URL? Query String Servlet print Query String Servlet doget 1 HttpServletRequest getquerystring() String word = request.getquerystring(); URL? word II 2 p.2

3 line = line.replace(word, "<font color= red >"+word+"</font>"); replace < > HTML line = line.replace("&", "&"); line = line.replace("<", "<"); line = line.replace(">", ">"); <, > HighLight.java print MyCalerdar? Servlet : y m d java.util.calendar Zellar static int Zellar(int y, int m, int d) { // if (m<3) { // y--; m+=12; return (y + y/4 - y/100 + y/400 + (13*m+8)/5 + d) % 7; images 1.png, 2.png,... Servlet SlideShow.java : request.getquerystring() null 1.png n HTML <html><head><title> n </title></head><body> <div align= center > <img src= images/n.png /><hr/> <a href= SlideShow?n-1 > </a> <a href= SlideShow?n+1 > </a> </div> </body></html> SlideShow II 2 p.3

4 2.2 HTML Form <form... > </form> <input... > <form action= URI method= post > </form> URI CGI Servlet URI method= post method= get URI? GET CGI/Servlet GET POST <input type= text size= n name= namae /> n namae type= text type= password * <input type= checkbox name= namae value= str /> str CGI/Servlet value on checked <input type= radio name= namae value= str /> namae str CGI/Servlet checked <input type= hidden name= namae value= str /> hidden CGI/Servlet <input type= submit value= str /> CGI/Servlet str <input type= reset value= str /> str <textarea cols= haba rows= takasa name= namae > </textarea> haba takasa II 2 p.4

5 2.3 Servlet POST POST Servlet doget dopost Servlet dopost name 1 =value 1 &name 2 =value 2 &... &name n =value n name 1, name 2,... input textarea name value 1, value 2,... value value Servlet dopost 1 HttpServletRequest getparameter getparameter name getparameter value : Aisatsu.html Servlet Aisatsu.html Aisatsu.html Aisatsu.java import java.io.ioexception; import java.io.printwriter; import javax.servlet.http.httpservlet; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; public class Aisatsu extends HttpServlet public void dopost(httpservletrequest request, HttpServletResponse response) throws IOException { response.setcontenttype("text/html; charset=windows-31j"); PrintWriter out = response.getwriter(); out.println("<html><head></head><body>"); request.setcharacterencoding("windows-31j"); String family = request.getparameter("family"); String given = request.getparameter("given"); out.printf(",%s %s!%n", family, given); out.println("</body></html>"); out.close(); %8D%81%90%EC%91%E5%8Aw Windows-31J request.setcharacterencoding("windows-31j"); II 2 p.5

setcharacterencoding 1 Windows- 31J JISAutoDetect Shift JIS, EUC-JP, ISO-2022-JP 2.3.1 Servlet HTML Servlet 2.3.2 HighLight Servlet : Web HTML Servlet HTML GuestBook.

<tr><td> :</td><td><input type= text size= 30 name= ></td></tr> <tr><td> :</td> <td><input type= text size= 30 name= ></td></tr> <tr><td> :</td> <td><input type= text size= 30

6 setcharacterencoding 1 Windows- 31J JISAutoDetect Shift JIS, EUC-JP, ISO-2022-JP Servlet HTML Servlet HighLight Servlet : Web HTML Servlet HTML GuestBook.html <html><head> <meta http-equiv= Content-Type content= text/html; charset=windows-31j > <title> </title></head> <body> <form action= GuestBook method= post > <br/> <table> <tr><td> :</td><td><input type= text size= 30 name= ></td></tr> <tr><td> :</td> <td><input type= text size= 30 name= ></td></tr> <tr><td> :</td> <td><input type= text size= 30 name= ></td></tr> <tr><td> </td> <td><textarea name= rows= 5 cols= 30 ></textarea></td> </table> <input type= submit value= ><input type= reset value= > </form> </body></html> 1 HTML Aisatsu.html II 2 p.6

7 Servlet Guests.html tmp.html tmp.html Guests.html Guests.html /WEB-INF Guests.html <?xml version="1.0" encoding="windows-31j"?> <html> <head><title> </title></head> <body> <h1 align="center"> </h1> <br/> <hr/> </body> </html> GuestBook.java 1 import java.io.bufferedreader; import java.io.file; import java.io.fileinputstream; import java.io.filenotfoundexception; import java.io.fileoutputstream; import java.io.ioexception; import java.io.inputstreamreader; import java.io.outputstreamwriter; import java.io.printwriter; import javax.servlet.servletexception; import javax.servlet.http.httpservlet; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; public class GuestBook extends HttpServlet { 2 Guests.html, tmp.html 2 </body> Guests.html tmp.html II 2 p.7

8 GuestBook.java public void dopost(httpservletrequest request, HttpServletResponse response) throws IOException { request.setcharacterencoding("windows-31j"); File tmp = new File(getServletContext().getRealPath("/WEB-INF/tmp.html")); PrintWriter fout = new PrintWriter (new OutputStreamWriter(new FileOutputStream(tmp), "Windows-31J")); File f = new File(getServletContext().getRealPath("/WEB-INF/Guests.html")); try { BufferedReader fin = new BufferedReader (new InputStreamReader(new FileInputStream(f), "Windows-31J")); String line; while (true) { line = fin.readline(); if (line==null) { fout.println(""); line="</body>"; break; if (line.contains("</body>")) break; fout.println(line); 3 GuestBook.java 3 fout.println("<table border>"); fout.printf("<tr><td> </td><td>%s</td></tr>%n", request.getparameter(" ")); fout.printf("<tr><td> </td><td>%s</td></tr>%n", request.getparameter(" ")); fout.printf("<tr><td> </td><td>%s</td></tr>%n", request.getparameter(" ")); fout.printf("<tr><td> </td><td>%s</td></tr>%n", request.getparameter(" ")); fout.println("</table>"); fout.println("<hr/>"); 4 line 2 </body> Guests.html tmp.html close() GuestBook.java 4 fout.println(line); while (true) { line = fin.readline(); if (line==null) break; fout.println(line); fin.close(); fout.close(); catch (FileNotFoundException e) { outputerror(response, e); return; 5 Guests.html tmp.html Guests.html II 2 p.8

9 GuestBook.java 5 f.delete(); tmp.renameto(f); 6 Guest.html ServletContext getrequestdispatcher RequestDispatcher / Web RequestDispatcher request response forward WEB-INF forward include GuestBook.java 6 try { getservletcontext().getrequestdispatcher("/web-inf/guests.html").forward(request, response); catch (ServletException e) { outputerror(response, e); return; private void outputerror(httpservletresponse response, Exception e) throws IOException { response.setcontenttype("text/html; charset=windows-31j"); PrintWriter out = response.getwriter(); out.println("<html><body><pre>"); e.printstacktrace(out); out.println("</pre></body></html>"); Servlet 4 Servlet Diary.java II 2 p.9

2.3.4 Servlet 2.4 : DOM Guests.html HTML XML XML DOM Document Object Model DOM Java javax.xml.parsers javax.xml.transform org.w3c.dom API GuestBookDom.java import import java.io.

10 2.3.4 Servlet 2.4 : DOM Guests.html HTML XML XML DOM Document Object Model DOM Java javax.xml.parsers javax.xml.transform org.w3c.dom API GuestBookDom.java import import java.io.fileoutputstream; import java.io.filereader; import java.io.ioexception; import java.io.outputstream; import java.io.printwriter; import java.util.enumeration; import javax.servlet.http.httpservlet; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; import javax.xml.parsers.documentbuilder; import javax.xml.parsers.documentbuilderfactory; import javax.xml.transform.outputkeys; import javax.xml.transform.transformer; import javax.xml.transform.transformerfactory; import javax.xml.transform.dom.domsource; import javax.xml.transform.stream.streamresult; import org.w3c.dom.document; import org.w3c.dom.element; public class GuestBookDom extends HttpServlet { II 2 p.10

11 GuestBookDom.java private static Element createtablefromkeys(httpservletrequest request, Document doc, Enumeration keys) { Element tbl = doc.createelement("table"); tbl.setattribute("border", "1"); tbl.appendchild(doc.createtextnode("y=n")); while (keys.hasmoreelements()) { Element row = doc.createelement("tr"); Element td1 = doc.createelement("td"); String left = (String)keys.nextElement(); td1.settextcontent(left); row.appendchild(td1); Element td2 = doc.createelement("td"); td2.settextcontent(request.getparameter(left)); row.appendchild(td2); tbl.appendchild(row); tbl.appendchild(doc.createtextnode("y=n")); return tbl; II 2 p.11

12 GuestBookDom.java public void dopost(httpservletrequest request, HttpServletResponse response) throws IOException { request.setcharacterencoding("windows-31j"); try { // String filename = getservletcontext().getrealpath("/web-inf/guests.html"); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newdocumentbuilder(); Document doc = db.parse(filename); // Element root = doc.getdocumentelement(); // root html Element body = (Element)root.getElementsByTagName("body").item(0); // body // table body.appendchild(createtablefromkeys(request, doc, request.getparameternames())); body.appendchild(doc.createtextnode("y=n")); body.appendchild(doc.createelement("hr")); body.appendchild(doc.createtextnode("y=n")); // TransformerFactory fac = TransformerFactory.newInstance(); Transformer tran = fac.newtransformer(); tran.setoutputproperty(outputkeys.encoding, "Shift_JIS"); // : Windows-31J OutputStream o = new FileOutputStream(filename); StreamResult result = new StreamResult(o); tran.transform(new DOMSource(doc.getDocumentElement()), result); o.close(); getservletcontext().getrequestdispatcher("/web-inf/guests.html").forward(request, response); catch (Exception e) { response.setcontenttype("text/html; charset=windows-31j"); PrintWriter out = response.getwriter(); out.println("<html><body><pre>"); e.printstacktrace(out); out.println("</pre></body></html>"); : GET, Query String, getparameter,, POST, dopost, setcharacterencoding, getrequestdispatcher, forward, DOM II 2 p.12

2 GET POST Servlet Servlet Servlet CGI/Servlet GET POST 2 GET URL? FORM GET : POST HT

2 GET POST Servlet Servlet Servlet CGI/Servlet GET POST 2 GET URL? FORM GET : http://maps.google.co.jp/maps?hl=ja&ll=34.292821,134.063587&z=15 POST HTML HTML : Aisatsu.html HTML