Servlet??(2) ???????????Web???

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Servlet??(2) ???????????Web???

• ????? ????
• s00395rk_at_sfc.keio.ac.jp

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???????

• Web???????????
• ???????????????????
• ??????????????
• ??????????????????????????????????
• Web???????????????()v

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???????(1)

• Web???????????
• HTTP???????????????????????
• ???????????????????
• ??????????????
• Web???????????????()v

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???????(2)

• Web???????????
• ???????????????????
• Web????Web??????????????????
• ??????????????????
• ??????????????
• Web???????????????()v

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???????(3)

• Web???????????
• ???????????????????
• ??????????????
• ?????????Java??????
• HTTP???????????????????HTTP???????????
• Web???????????????()v

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???????(4)

• Web???????????
• ???????????????????
• ??????????????
• Web???????????????()v
• Web?????????????
• Web?????????????
• ???Servlet????????????
• Web????????????!!!!

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?????

• ??????????????????????????????????????????????
• HTML?????????Servlet???????????????????????????Web
  ???????

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Servlet?????????(1)??????????
Web Browser
Tomcat
???
TimeServlet.class
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Servlet?????????(2)???????????
Web Application Server (Tomcat)
Web Browser
Web Server
Servlet Engine
TimeServlet.class
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Servlet?????????(3)

1. ?????Web????????HTTP???????????
2. Web??????????????????????????????????
3. ?????????????????????????????????????????????????
4. ??????????????????????????????????????????????????
   ???Web???????
5. Web?????????????????????????

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Web?????????

• Q.Web???????????????????

A.???????????????????
??????????????!
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???Web????????

• ???Web????
• ?????????????????
• ?????????????????????????
• ??????Web????
• ???????????????????????????????????????????
• ???????????

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?????????Web????
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?????-??????Web???
Web????? ??????
index.html
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??????-??????Web???
???
???
????
web.xml???????????
??
web.xml?????????????????????????????????????????
????????!
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?????Servlet?????????
ApplicationServer
WebBrowser
toukou.html
???
ToukouServlet.class
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HTTP GET?HTTP POST

• ??????GET?POST????????????????????

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????????
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??????????????
ApplicationServer
WebBrowser
toukou.html
???
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??????????HTML????
..ltform name"form1" method"post
action"../servlet/ToukouServlet"gt ltfont
size1gt???lt/fontgt ltinput type"text"
size"20" name"contributor"gt ltfont
size"1"gt????lt/fontgt ltinput type"text"
size"50" name"title" gt ltfont size"1"gt??lt/font
gt lttextarea namecontent" cols"50"
rows"10"gt lt/textareagt ltinput typesubmit
namesubmit value??gt ltinput typereset
namereset value????gt lt/formgt..
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HTML???????(1)?????????

• ltform nameform1 methodpost
• action../servlet/ToukouServletgt

???????????????????(??)? ??????????????????(??)?
lt/formgt
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HTML???????(2)???????????????
ltinput type " text " size " 20 " name "
contributor " gt
lttextarea name " content " cols"50"
rows"10"gtlt/textareagt
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HTML???????(3)???????????????
ltinput type " submit " name " submit " value
"??" gt
ltinput type " reset " name " reset " value
"????" gt
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???????

• HTTP POST??????????

HTTP GET??????????????????????? GET
./servlet/ToukouServlet?contributor???titleweb.
xml HTTP/1.1 ??????????URL????????????? ????HTTP
POST??????????
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???????? ??
?????
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????????
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??????????????
ApplicationServer
WebBrowser
???
ToukouServlet.class
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???????????
POST ./servlet/ToukouServlet HTTP/1.1 Length 64
contributor???titleweb.xml????? question
web.xml?????????????
??? ???????????(Tomcat)? ???????????????????
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??????????

• ?????(Key)????(Value)????????????
• ????????
• ????????????name?Key
• ??????????????Value

contributor ??? title
web.xml????? name web.xml?????????
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??????2????
ToukouServlet.java
?????? ??????
????????????? (????????)
HTML????? ??
?????
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public class ToukouServlet extends HttpServlet
/ doPost() ??????POST???????????
?????????????????????????? / public void
doPost(HttpServletRequest request,
HttpServletResponse response) throws
IOException, ServletException
//??????????????????? /
HTML????????????????????
??????????????????????????? /
request.setCharacterEncoding("Shift_JIS")
/ ???????????????????????????
???????????????????????? / String
contributor request.getParameter("contributor")
//??contributor?????????????contributor????
String title request.getParameter("title")
//??title?????????????title???? String
content request.getParameter("content")
//??content?????????????content????
//????????????????
//???????????????????
//??????????????????????????????
response.setContentType("text/htmlcharsetShift_J
IS") //??????????PrintWriter??????
PrintWriter out response.getWriter()
//HTML?????????????????/
out.println("lthtmlgt") out.println("ltbody
bgcolor\"33CCFF\" text\"000000\"gt")
out.println("lthrgt") //???????????????
out.print("ltbgtltfont size4gtltpgt"contributor"?????
lt/fontgtlt/bgt") out.print("(????" new
java.util.Date() ")ltBR/gtlt/pgt")
//?????????? out.println("ltpgtltfont size5
color\"00339\"gtlt/fontgtltfont size5gt"title"lt/fo
ntgtlt/pgtlthr/gt") //???????
out.println(content"lt/pgtlthr/gt")
out.println("lt/bodygt") out.println("lt/htmlgt")
//????????????????
?????? ??????
HTML????? ??
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?????????????????????????

• HTML????????????????????
• ???????????????????????????

request.setCharacterEncoding("Shift_JIS")
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??????????

• ???????????????????????????
• ?????????????????????????????

String contributor request.getParameter("contrib
utor") //??contributor?????????????contributor???
? String type request.getParameter("type") //??
type?????????????type???? String content
request.getParameter(content") //??content??????
???????content????
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???????????
String contributor request.getParameter("contrib
utor")
Key
Value
contributor ??? title
web.xml????? name web.xml?????????
???
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HTML??????????????????????

• ??????????????
• ????????????????

response.setContentType("text/htmlcharsetShift_J
IS")
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HTML???????
//HTML?????????????????/ out.println("lthtmlgt")
out.println("ltbody bgcolor\"33CCFF\"
text\"000000\"gt") out.println("lthrgt") //??????
????????? out.print(ltbgtltfont size4gtltpgtcontribu
tor?????lt/fontgtlt/bgt") out.print("(????" new
java.util.Date() ")ltBR/gtlt/pgt") //?????????? out
.println("ltpgtltfont size5gt"title"lt/fontgtlt/pgtlthr/
gt") //??????? out.println(content"lt/pgtlthr/gt") o
ut.println("lt/bodygt") out.println("lt/htmlgt") //
????????????????
??????????????????!?\???????
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???????? ??
?????
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????????
???????????????????????????????????????? (????????
???????????????)
???????????????????? HTML?????????????????????????
??????????????? (???Web????????????????)
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Web??????(??)

• Web??????????????????????????????
• (Web???????????????????????????)

GimonKaiketu-Web
WEB-INF
classes
ToukouServlet.class
lib
web.xml
toukou.html
html
index.html
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????HTML??????

• text-????????
• textarea-???????
• radio-??????
• checkbox-????????
• select-???????
• submit-?????
• reset-???????
• ???password?hidden

????WWW???????HTML???????????
http//tohoho.wakusei.ne.jp/www.htm
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???????!!!

• ?????????Web?????????????
• ???????????????????????
• ????o(-)o