Web信息系统毕业论文中英文资料外文翻译文献Word下载.doc
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Web信息系统毕业论文中英文资料外文翻译文献Word下载.doc
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dizzying
mirror
chaos,itisdifficultto
choose.
More
popular
Java
ofSer
vet
development
program
amorepractical
Of
choice.
Servlet
is
running
applet
ontheWebserver,
canbecompleted
Xu
Multi-client
Applet
cannotcomplete
thework,whichruns
ontheserver
and
clients
No
end,donot
download
donot
by
client
securityrestrictions,
speed
Greatlyincreased
AndApplet
in
browser
extend
browser'
s
ability
similar
Like,
Serv
thelet
run
theWeb
server
to
enable
engine
Andexpand
capacity
server.
Therefore,wecansay
in
onaWebserver,
JavaServletAPI
And
Jav
classes
andpackages.
1Servlet
access
model
2Serv
thelet,therearethree
accessmodels:
(1)
anaccess
model
1
browserto
Webserver
issue
retrieval
request.
2
after
receiptoftherequest,
request
forwardedtothe
Servletengine.
3Serlet
engine
toperformtherequested
Servlet
directly
throughJDBC
4Servlet
throughJDBC
toretrieve
searchresults
generate
html
pageand
Page
backto
Webserver.
5
thepage
sent
backtothebrowser.
(2)Thesecond
serverreceivestherequest
afterthe
forwardedto
v
theletengine.
3Servlet
toperformthe
retrieve
sent
Ja,
vabean
data.
4data
Javabean
searchabledatabase
throughJDBC
information
fromthesearchresults
stored
itself.
5Servlet
remove
from
data
Javabean
generate
Html
pageand
Ht
mlof
page
backtothe
w
eb
server.
6
(3)
Thethird
accessmodel
1A
totheWebserver.
Web
engine.
OfSer
vlet
inspection
3The
cable
databaseand
arestoredinthe
resultisstored
Javabean
into.Javabean,
4.
Ser
resultsarestored
and
JSPfiles
format
output
page.
functionalityand
lifecycle
2.1Servlet
functions
Create
andreturn
dynamicWebpages
based
on
customerrequests.
(2)
create
canbeembeddedinto
existing
HTMLpages
aspartof
HTML
Page(HT
fragment)
theML.
other
serverresources
(includingdatabases
applications
a
Program)
tocommunicate.
(4)
handle
multiple
connections,receiving
input
more
than
one
client,and
Theresults
broadcastto
multipleclients.
For
example,Ser
isamulti-participant
Gameserver.
(5)
ofMIM
E
type
filter
information
specialhandling,suchas
image
Conversionand
server-side
include
(SSI).
(6)
custom
processing
available
allserversin
thestandard
routine.
2.2Servletlifecycle
lifecycle
begins
with
itinto
Webserver'
smemory
end
terminationor
re-loaded
thelet.
(1)load.
Load
servlet
atthefollowing
times:
1.Ifyouhaveconfigured
automatic
load
option,and
then
start
automaticallyloaded
2.After
Webserver,
issued
for
first
time,please
Demand.
3.Reload
Loaded
Servlet,Webservers
tocreatea
servletinstance,
Servlet'
init()method
called.
initialization
parameters
initializationphase,
The
number
ispassed
totheServlet
configurationobject.
(2)terminate
When
nolonger
needs
servlet,
or
reload
Servlet
Anewinstanceof
calls
thelet'
destroy()method,
removeitfromthe
Memory
deleted.
3Howto
call
Method
called
Total
fivekinds:
intheURL
form
<
Form>
Tag
call,
HT
theML
JSPfiles
Call,
inanASPfile.
Thefollowing
itemized
tobeintroduced.
(1)callthe
intheURL.
Simply
inputformat
inthebrowser
as
http:
∥yourwebserver
thesame
ser
name
/servlet
path/
theURL
to
site
canbe.
Ofwhich:
yourwebservername
referto
wheretheWebserver
name,
theservlet
pathisthe
path
referstothe
Servlet,
theservletThe
refersto
realname
ana
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