软件工程本科毕业外文文献翻译Word文件下载.docx
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gooｄ
effeｃts
ｉｎ
prａctiｃａl
aｐpｌiｃaｔions。
Ｉｎtroｄuｃtｉon
Gｅnｅraｌlｙ
J２ＥE
ｐlatfｏrm[27］
ｕｓｅｄ
ｉn
ｌaｒge
ｅnterprise
aｐｐlicatiｏns，
can
weｌｌ
ｓolve
aｐpｌｉcaｔｉｏn
ｒeｌiability，
safｅtｙ
ａnd
stａbility，
its
ｗｅaｋｎess
is
ｐrｉcｅ
higｈ
and
conｓtructｉnｇ
ｃｙcｌe
lonｇ.
Ｃorresｐｏｎdｉnｇ
ｔhe
sｍall
medｉｕm
ｅnteｒprise
ａpplｉcatｉｏns,
replaｃｅ
ａppｒoａｃh
tｈｅ
systｅm
frａmeｗork
oｆ
lightweiｇhｔ
ＷEB，
inclｕding
moｒｅ
comｍｏｎｌy
usｅd
methods
whicｈ
are
baｓｅｄ
ｏn
thｅ
Sｔruｔs
Hibeｒnate.
Wｉｔh
wide
aｐplicaｔioｎ
Sｐriｎg,
ｔhｒeｅ
tecｈnｏlogｙ
cｏmｂinatiｏｎ
may
bｅ
bｅtteｒ
choiｃe
ａs
ｌigｈtweight
ＷEB
framｅwｏrk．
It
useｓ
ｌaｙered
structure
provides
ｇood
ｉｎtegrａted
ｆrameｗoｒｋ
foｒ
Weｂ
aｐｐｌicatｉons
at
all
lｅvels
ｍinimizｉng
Inｔｅrlayeｒ
ｃoｕpｌiｎｇ
increasｉng
efｆiciency
ｄｅvｅlopmeｎt.
Ｔｈiｓ
framewoｒｋ
ｃan
sｏｌve
ｌｏt
ｏf
probｌems，
wｉth
ｇoｏd
ｍaintaｉnaｂiｌity
ｓｃaｌaｂiliｔy.
Ｉt
sｏlve
separatioｎ
ｕser
ｉnｔerface
buｓｉness
logiｃ
separａｔiｏｎ，
separation
ｂusiｎess
lｏgic
datａｂａse
operａtion
cｏrrect
ｐroceduｒe
ｃontrｏl
ｌｏgｉc，
etｃ。
paper
stuｄｉes
ｔｅｃhnolｏgｙ
ｐriｎciple
Struｔs
Spｒｉng
Hiｂernatｅ,
pｒｅseｎｔing
proved
ｌiｇｈｔweｉght
ａｐpliｃatiｏn
framewoｒk
ｆoｒ
ｅnterｐrise。
Hierarchicａl
Web
Mechａnism
Hiｅrarcｈicａl
fｒaｍework
incｌｕｄing
ｕsｅr
prｅsentaｔiｏn
layｅｒ，
bｕsｉnｅss
lｏgicｌayｅr,
datａ
persistencｅ
layeｒ
，expaｎｓｉoｎ
layer
eｔc，
eaｃh
ｆｏr
diｆfeｒenｔ
fｕｎｃｔｉoｎ,
respｅctiｖｅlｙ
fｉnisｈ
whoｌｅ
aｐplication。
Ｔｈe
whole
ｓystem
ａre
divｉｄｅd
inｔｏ
dｉffｅreｎt
mｏｄulｅ
relatively
ｉｎdependent
mｕtuaｌ,
each
ｍodule
ｃaｎ
be
imｐｌｅmentｅd
according
ｄiｆferent
desｉgn。
cａｎ
ｒeaｌiｚe
syｓｔeｍ
parａｌlel
ｄｅvｅlopment,
rapid
integration，
ｍaintaｉnabｉlity，
sｃalabiｌiｔy。
Ｓtruｔｓ
ＭVC
Ｆｒamｅwork
To
ｅｎｓｕrｅ
rｅusｅ
efficiｅnｃy
ｄevelopｍent
process，
adoptｉng
techｎoｌogy
build
appｌｉcatｉon
must
ｓｅlｅｃｔ
sｙｓｔem
framework
ｗｈich
hａs
ｇooｄ
ｐeｒfｏrmance
.
Only
iｎ
this
wａy
we
eｎｓurｅ
ｎot
ｗａsｔｉng
lｏts
tiｍe
becａuse
aｄjustinｇ
cｏｎfiｇｕratiｏn
ａｃhieve
apｐliｃaｔion
ｄeｖｅｌｏpｍeｎｔ
effiｃiｅnｔly
quickly．
Ｓo,
proｇraｍmerｓ
ｃoｕｒse
ｐｒaｃtiｃe
ｇoｔ
ｓuccessｆul
devｅlｏpmeｎt
ｐａtｔeｒｎ
which
proｖeｄ
practical,
sｕch
as
MVＣ
O/R
maｐpｉng，
etc；
ｍａnｙ
ｔｅchnologies，
inｃｌｕｄiｎg
Ｓtruts
Hｉbernaｔe
fｒａmeworkｓ，
ｒealiｚed
tｈｅｓｅ
pattern.
Hoｗeｖer,
Struts
only
settlｅd
seｐaration
proｂlem
beｔweｅn
vｉew
laｙeｒ
buｓineｓs
ｌogic
ｌａｙer,
coｎｔｒｏｌ
layer，
did
ｐｒoｖide
flexible
supporｔ
ｆor
cｏmplｅx
dａta
savｉng
proｃeｓs.
On
conｔraｒｙ，
Hibernａtｅ
fｒａmｅwork
ｏffｅred
poｗｅｒful
flｅxｉｂｌｅ
ｓupport
for
compleｘ
dａｔａ
ｓａving
pｒocｅss.
Thereｆorｅ，
how
ｉｎtegrate
two
framewoｒkｓ
ａnｄ
get
ａ
flexｉble，
loｗ－ｃoupｌｉｎｇ
solｕtｉｏns
proｊect
whｉch
ｉs
eａsy
tｏ
maintain
iｎｆorｍation
syｓtem，
reseａrch
task
whｉｃh
engiｎeering
stａfｆ
iｓ
studying
coｎstaｎtｌy.
Mｏdｅl-Vｉｅw-Coｎtｒolｌer
（MVC）
ｐopｕlar
design
paｔterｎ．
divｉdes
intｅracｔive
ｓｙｓtem
threｅ
coｍｐｏnenｔs
eａch
tｈem
spｅcializes
one
tａsｋ．
Ｔhe
model
ｃontaiｎs
apｐlicａｔion
ｄaｔａ
maｎages
ｃore
fuｎｃｔionality。
vｉsｕal
dｉsplay
feedback
useｒｓ
aｒe
ｍanaｇed
by
viｅw.
The
ｃoｎｔroller
not
ｏｎlｙ
ｉnｔerｐｒeｔｓ
ｉnpuｔs
from
user，
alsｏ
dｏmｉnａｔｅs
ｍodel
view
ｃhanｇe
ａpprｏpriａtｅｌy。
ＭVＣ
separａtes
sysｔeｍ
funｃｔiｏnality
system
inｔｅｒｆａce
ｓo
enｈaｎce
ｓｙstem
scalability
mainｔainａｂility。
typicａl
MVC
ｆrame[32］,
it
also
containｓ
thｒee
afｏremｅｎtioned
cｏmponents。
Thｅ
leveｌ
composeｄ
JavａBeａn
ＥＪＢ
compoｎｅntｓ。
cｏntroller
rｅａlized
aｃtioｎ
ActｉonSｅｒvlet，
viｅw
ｌayer
ｃｏｎｓists
ＪSP
fiｌｅs.
ｃeｎtrａl
contrｏller
cｏｎｔrolｓ
aｃtiｏｎ
execuｔiｏn
ｔｈaｔ
receivｅｓ
ｒequest
redirectｓ
tｈｉs
ｒequeｓt
appｒopriaｔe
mｏｄｕle
ｃontrolｌeｒ.
Sｕbｓeｑｕｅntly，
module
coｎｔｒollｅr
procｅsseｓ
reｑuest
rｅturns
ｒesults
cｅntraｌ
ｃoｎtroｌler
ｕsiｎg
JavaBean
oｂject，
stoｒes
any
objecｔ
ｂe
ｐｒeｓented
laｙer
inｃludｉnｇ
an
inｄiｃation
moｄｕle
views
tｈat
mｕst
presｅnteｄ。
centｒａl
contｒoller
redｉrects
ｔhｅ
rｅturnｅｄ
JａｖａＢｅａn
ｏbｊｅct
main
ｖieｗ
dｉsplays
itｓ
infoｒmaｔｉon。
Sｐriｎｇ
Frameｗork
tｅchnoloｇy
Sprｉng
liｇｈtweｉｇｈt
J２EE
aｐｐlicaｔiｏn
devｅloｐment
framework,
ｗhicｈ
ｕses
moｄｅl
Ｉｎversion
Cｏntrol（IｏＣ）
ｓeｐａｒate
aｃｔｕａl
Confｉｇｕｒａtiｏn
depｅｎdｅnｔ
regulations
applicatｉon．
Cｏｍmiｔtｅd
Ｊ2EE
apｐlｉcａtion
ａt
alｌ
levｅls
solutｉoｎ，
Sｐring
ａttempting
replａcｅ
ｅxiｓｔing
ｆramework，
buｔ
rａthｅr
“welｄｉng"
J2EＥ
ａｐｐlicatiｏn
ａll
leｖels
tｏgether
thrｏugh
PＯＪＯ
manageｍeｎt．
In
ａdditioｎ,
developers
fｒee
choose
framｅwoｒk
sｏme
all，
since
Sｐｒing
moduｌｅs
ｎｏt
ｔｏtally
depｅnｄenｔ．
As
majoｒ
buｓineｓs-level
detaｉl，
Spｒing
ｅmｐloyｓ
ｉdea
dｅｌay
injｅction
ａsseｍｂle
code
fｏr
ｓaｋe
imｐrovｉng
scalaｂiｌｉty
flexiｂiｌｉty
ｏｆ
built
syｓteｍs．
Tｈus，
sｙｓtemｓ
ａchｉｅve
cｅntralized
busiｎess
pｒoｃesｓinｇ
reductｉon
reuｓe
ｔhｒｏugh
Ｓpｒｉng
ＡＯP
mｏdｕle.
Hibｅrnate
Ｐersisteｎt
Fｒameｗork
Hibｅrnａte
ｋiｎd
oｐen
ｓｏurce
with
ＤAO
deｓiｇｎ
ｐattｅrｎs
achievｅ
mapping（O／R
Mapｐing）
between
ｏbject
ｒelaｔional
ｄatabasｅ。
Durｉng
Ｗｅb
developｍent，
ｔrａｄiｔiｏn
approacｈ
dirｅctly
intｅrａcts
ｗiｔh
database
bｙ
ＪDBC
.Howｅvｅr，
method
has
oｎly
ｈeａvy
workｌｏad
but ａlso
coｍplex
ＳQL
cｏｄes
JDＢC
whiｃｈ
nｅｅd
revｉse
becａusｅ
busｉness
ｓlightly
ｃｈａnｇes。
So，
whatｅver
ｄeｖeloｐment
ｏｒ
mainｔａｉn
iｎｃｏnveｎient。
Considｅriｎg
ｔｈe
lａｒｇe
ｄｉffｅreｎce
bｅｔｗeeｎ
ｏbjecｔ－oriｅnted
ｒｅlａｔiｏn
jａvａ
sｔrｕcｔure
reｌational
daｔabase，
ｎｅcessary
inｔroｄuce
dｉrｅct
ｍapｐing
mecｈanism
betｗeen
object
dａtaｂａｓｅ，
ｔｈｉs
kiｎｄ
maｐpｉng
ｓhouｌｄ
ｕse
ｃonfiguratｉon
fiｌeｓ
soon
ｐosｓｉｂilｉｔy,
tｈaｔ
ｍaｐping
fｉles
will
neｅd
modｉfying
ratｈer
than
java
soｕｒｃe
ｃｏdes
when
changｅs
fｕｔuｒe.
Thｅrｅｆore，
mapping
patｔern
emergｅs，
wｈiｃh
hibeｒｎate
moｓｔ
ｏutsｔandｉｎg
rｅaｌizaｔｉｏn
architｅcture．
enｃapsuｌates
ＪDBＣ
witｈ
liｇhtweｉghｔ
ｍaking
Java
pｒogｒaｍｍeｒ
operate
relatioｎaｌ
objｅct
oriented
proｇrammｉｎg
tｈｉnking。
impｌemeｎtatｉon
teｃhnoloｇy
ｌasｔｉng
laｙeｒ．
Comｐared
othｅr
ｌaｓtiｎｇ
lａyer
technoｌogy
ＪDＢC,
ＥJB，
JDO，
Hibernａte
eａｓy
ｇrasp
ｍore
ｌｉnｅ
ｏbjecｔ-orｉented
programming
thｉnkinｇ.
Ｈibernａtｅ
owｎ
query
lanｇuaｇe
（HQL）,
fulｌy
object—oｒientｅｄ.
baｓiｃ
ｓtｒucture
iｔｓ
appｌiｃatioｎ
ｓｈoｗn
ｆigｕre6.1.
ｄaｔa
pｅrsistenｃｅ
frａmｅwork，
ｃoｒe
ｔeｃhnologｙ
objeｃt
/
ｒｅｌaｔional
ｄatabase
mapｐiｎg（ORＭ）.
Hibｅｒｎaｔe
ｇｅneｒａlly
cｏnｓidered
ａｓ
briｄge
betweｅn
Ｊaｖa
ａpplicaｔｉoｎs
rｅlａtiｏnaｌ
datａbasｅ，
oｗing
ｐｒovｉｄing
duｒabｌe
serviceｓ
aｐｐlｉcatiｏns
allowinｇ
dｅｖelopers
ｔｏ
uｓe
ａn
oｂjeｃt-oriｅntｅd
apｐroacｈ
manaｇｅment
ｍａnipｕlaｔｉon
ｒelａtioｎal
database.
Ｆurthermore，
ｉt
furnisheｓ
ｏbjeｃt-orieｎtｅd
ｑuｅrｙ
languａｇe－ＨＱＬ．
Rｅspｏnsible
mａpping
betwｅen
major
catｅgｏrieｓ
Jａｖa
reｌａｔional
dａｔabase，
Ｈiｂernaｔｅ
essentｉally
middle
waｒｅ
proviｄing
servicｅs．
suｐｐlｉｅs
duraｂle
daｔａ
ｓerviｃeｓ
ａｐplications
utilizｉng
databasｅs
seｖeral
profiｌes，
ｈibernaｔｅ
proｐeｒties
XML
Mapping
。
Websｅrvｉcｅｓ tｅchnolｏgiｅs
Ｔhｅｉntroduｃtionｏfannoｔatｉｏns iｎtoＪａvａ EE ５makeｓiｔｓimｐlｅ tocreatｅsophisticａｔed Webserｖiceenｄpoiｎtsanｄclientｓwiｔｈ less codｅandasｈｏｒterleａrningcuｒvｅthaｎ waｓpossibｌewitｈearlｉｅｒJavaＥE ｖersionｓ。
Annotaｔionｓ-fｉrstiｎtrｏduｃｅdｉnJaｖaSE5 — aremodｉfieｒｓyoｕcanａdｄｔoyｏurｃｏdeas metadata. Theｙ dｏn’t affecｔｐrograｍ semａntiｃsｄirectlｙ,ｂuｔtheｃompｉleｒ，developｍeｎttooｌs, ａndruｎtime lｉｂｒａriｅsｃａn ｐrｏcessthemtoprodｕce adｄitioｎalJaｖａlaｎguａgesｏｕrcｅfileｓ，ＸMLdocｕｍeｎｔｓ，orｏther artｉfａｃtｓ andbehａviorthaｔaugmｅnttｈｅｃodecontaiｎingtｈeannotations （seeResourcｅｓ）.Ｌateｒｉnｔhearticle,you’llsee hoｗｙouｃan eａsilｙturｎa reguｌａｒJaｖａcｌassｉnto aWebｓervice ｂｙ addingｓiｍplｅannotaｔions.
Webaｐpｌｉcationｔeｃhnologies
JａvaＥE5ｗｅlcｏｍestｗomaｊorpｉecesｏffｒont－eｎdｔechnｏlogｙ— JＳFaｎdJＳＴL—ｉntothe sｐeｃificatｉonｔojoin ｔheｅｘistｉngＪavaServerPaｇesandＳervｌetspｅcificatiｏnｓ。
JSＦ isａsｅtof ＡPIsｔhａteｎabｌｅ aｃoｍpｏnｅｎｔ—ｂasｅｄapprｏachto user—inteｒfacｅｄeｖｅlｏpment。
JSTLisaset oftaｇlｉｂｒariｅｓtｈaｔ ｓｕｐｐｏrｔeｍbeddｉｎgｐroｃｅdurａl ｌogｉc，accesｓtoJavaBeａｎｓ，SQLcoｍｍands,localiｚｅdformａttｉnginsｔｒuctionｓ,anｄXMLprocessｉｎｇiｎJＳPs.Tｈe ｍost rｅcentｒelｅasｅsofJSF,JSTL，andＪSPｓuppｏrｔa unifｉeｄeｘprｅssioｎlaｎｇｕａgｅ（EL） ｔhat alｌowstｈｅsｅｔeｃhnｏlｏgiｅstoinｔegratemorｅeasily（seeＲｅsｏurcｅs）。
Theｃorｎerstoｎeof Wｅｂservｉces sｕppｏｒt ｉnJava EＥ５ ｉsJAX-WＳ 2．0，wｈichis a ｆｏllow—on ｔoＪAX—RＰC1。
1.Ｂothofｔheseteｃhｎｏlogies lｅｔyou cｒeatｅＲESＴｆｕl anｄSOAP-bａsedWｅbservicｅｓwithoutｄeaｌingdirectｌywiththeteｄiumoｆXMLpｒocｅsｓingandｄatabindｉｎｇ inherｅntｔoWebｓervicｅｓ. Developersarefreeto conｔｉnuｅusingJAX—ＲＰC（which is stillrequired ofＪavaEE 5contａiners）， butｍiｇｒatｉngtｏJAX—WＳ issｔrongly recommended. NewcｏmｅrstoJava Wｅb seｒvicｅs ｍight aｓwｅｌlskip ＪAX—ＲＰC andheaｄｒightfoｒ JAX－WＳ.Thａt saｉd，it’sgｏodtoknoｗthaｔ both ofthemsupporｔSOAＰ1.1oｖer HTTP 1.1andsoare ｆｕlｌy
升级会员 