bao cao thu viec ciren

8/2/2019 Bao cao thu viec CIREN

1/34

1

LI CM N

Chng em xin chn thnh cm n Mt ln na, chng em xin chn thnh

NHN XT CA NGI HNG DN

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................

............................................................................................................................................TP HCh Minh, ngy thng nm 2010


2/34

2

Li cm n

Chng em xin chn thnh cm n qu thy c trong khoa TonTin hc Trng

i hc Khoa hc T nhin tn tnh dy bo cho chng em nhiu kin thc b ch

trong sut thi gian hc tp ti trng cng nh to iu kin cho chng em c

thc tp tip cn vi mi trng lm vic thc t. Knh chc cc Thy c lun di do

sc khe v thnh cng trong cuc sng.

c bit chng em xin by t lng bit n su sc n qu c quanTrung tm

ng dng cng ngh thng tin pha Nam to iu kin v mi trng cho sinh vinchng em c lm vic nghin cu ti qu cng ty.Cng nh gi li bit n su sc n

ngi hng dn v cc anh ch trong c quan , nhng ngi tn tnh hng dn

chng em trong sut thi gian thc hin n thc tp, cho chng em s bnh tnh v t

tin, gip chng em rt ra nhiu bi hc kinh nghim qu bu mi khi chng em vp phi

nhng kh khn. Chng em kh c thhon thnh ti thc tp ny nu khng nhs

tn tnh ch bo ca qu c quan.

Xin cm n

Sinh vin thc hin

Dng Hng Tun


3/34

3

Mc lcPhn 1: NHT K THC TP .................................................................................. 4

Tun 1 (t05/04 n 09/04): ........................................................................................ 4

Tun 2 (t12/04 n 16/04): ........................................................................................ 4

Tun 3 (t19/04 n 24/04): ........................................................................................ 4

Tun 4 (t26/04 n 29/04): ........................................................................................ 4

Tun 5 (t04/05 n 07/05): ........................................................................................ 5Tun 6 7 (t10/05 n 21/5): ..................................................................................... 5

Tun 8 (t24/05 n 04/06): ........................................................................................ 5

Phn 2: TM HIU VC QUAN THC TP.......................................................... 6

I/ Gii thiu : ............................................................................................................... 6

II/ T chc ................................................................................................................... 6

Phn 3: NI DUNG THC TP ................................................................................ 8

I/ Cng ngh Java / J2EE ............................................................................................. 8II/ J2EE Framework : Struts2 , Hibernate ..................................................................... 8

1/ Struts2 .................................................................................................................. 9

2/ Hibernate ............................................................................................................ 12

3/ Bi tp v dng dng framework ...................................................................... 15

II/ Portal / Portlets ...................................................................................................... 20

1/ Gii thiu v Portal , Portlets .............................................................................. 20

2/ Hot ng ........................................................................................................... 253/ Bi tp v dng dng Portlets ........................................................................... 28

Phn 4: KT QUT C ............................................................................... 34


4/34

4

Phn 1: NHT K THC TP

Tun 1 (t05/04 n 09/04):

Lm quen ngi hng dn v nhn vin trong phng ban Tm hiu v cng vic v cch thc lm vic trong c quan. Tm hiu v nhng kin thc lin quan s phc vcho ti ca c quan

nh : WebService , Portal , J2EE framework ,

c hng dn v cch thc lm vic nhm trong ti

Tun 2 (t12/04 n 16/04):

c giao tm hiu v framework Struts 2 v Hibernate .ng dng vit bitp cho ngi hng dn yu cu

c giao tm hiu v Axis2 Service , khi nim Portal , Portlets c giao bi tp, chun b bo co vi ngi hng dn v ng dng

portlets

Tun 3 (t19/04 n 24/04):

Trnh by vi ngi hng dn v Portal v Portlets Bt u tham gia d n ca c quan thc tp Xy dng tng ng dng d liu s dng Open Source Axis2 Service ca

Apache

Tun 4 (t26/04 n 29/04):

Tip tc c giao xy dng tng d liu Web Services


5/34

5

Bt u nghin cu , xy dng ng dng Portlet c bn cho d n c quanTun 5 (t04/05 n 07/05):

Xy dng cc c bn Portlet cho dn c quan cng vi cc thnh vintrong nhm

Tm hiu v s dng Struts2 plugin trong ng dng portlets

Tun 6 7 (t10/05 n 21/5):

Tip tc xy dng cc portlets chung vi cc thnh vin , nhm c kthut xy dng portlets sau ny p dng vo d n ca c quan

Tun 8 (t24/05 n 04/06):

Kt thc qu trnh nghin cu xy dng portlets Bo co vi ngi hng dn thc tp kt qut c Kt thc qu trnh thc tp Bt u tin hnh xy dng dn trong c quan cng cc thnh vin trong

nhm


6/34

6

Phn 2: TM HIU VC QUAN THC TP

I/Gii thiu :

Cc Cng ngh thng tin l t chc trc thuc B Ti nguyn v Mi trng, c chc

nng gip Btrng qun l, cho vng dng, pht trin cng ngh thng tin v t

chc thc hin cc dch v cng vng dng, pht trin cng ngh thng tin trong cc

lnh vc thuc phm vi qun l ca B. Cc cng ngh thng tin c 5 n v qun l nh

nc: Phng K hoch Ti chnh; Phng Khoa hc, Cng ngh v Hp tc quc t;

Phng Php ch; Vn phng; Chi nhnh Cc Cng ngh thng tin ti thnh ph H Ch

Minh v 5 n v s nghip: Trung tm Chuyn giao cng ngh; Trung tm Cng nghphn mm v GIS; Trung tm Lu tr v Dch v thng tin ti nguyn - mi trng;

Trung tm C sh tng cng ngh thng tin; Trung tm ng dng cng ngh thng tin

pha Nam (tr sti thnh ph H Ch Minh)

Trung tm ng dng cng ngh thng tin pha Naml n v s nghip trc thuc Cc

Cng ngh thng tin, c chc nng gip Cc trng trin khai thc hin nhim vng

dng v pht trin cng nghthng tin ti nguyn v mi trng pha Nam thuc phm

vi qun l ca Cc.

Trung tm ng dng cng ngh thng tin pha Nam c tr st ti 36 L Vn Phc,

qun 1, thnh ph H Ch Minh, c con du, ti khon ng k ti Kho bc nh nc v

ngn hng theo quy nh ca php lut.

II/T chc

- Trung tm c Gim c v khng qu 03 Ph Gim c.


7/34

7

- Gim c Trung tm chu trch nhim trc Cc trng v cc nhim vcgiao; quy nh chc nng, nhim v ca cc n v trc thuc; phn cng nhim

v cho cn b, vin chc, lao ng v iu hnh mi hot ng ca Trung tm.

Ph Gim c Trung tm gip vic Gim c Trung tm, chu trch nhim trc

Gim c Trung tm vcc lnh vc cng tc c phn cng.

- Cc phng ban trong trung tmo Phng Hnh chnh tng hp.o Phng Qun l d n.o Phng C sd liu v chuyn giao cng ngh.o Phng ng dng cng ngh thng tin.


8/34

8

Phn 3: NI DUNG THC TP

I/Cng ngh Java / J2EE

Java 2 Platform, Enterprise Edition (Nn tng Java, phin bn 2 - bn dnh cho kinh

doanh l cng ngh ca Sun Microsystems) hay Java EE (gi tt l J2EE) l mt nn lp

trnh dnh cho vic pht trin ng dng phn tn kin trc a tng, ch yu da vo cc

thnh phn mun chy trn cc my chng dng. Java EE cn c xem nh l mt

ngn ng hay mt tiu chun v c th cng b l sn phm ca htng thch viJava EE, cc nh cung cp phi tun th mt s yu cu t ra.

Java EE bao gm mt sc tk thut API, nh JDBC (C cu lin ni vi c sd

liu), RMI (thi hnh phng php t xa), th in t (e-mail), JMS (Java Message

Service - Dch v thng ip ca Java), Dch v mng (Web services), XML , , v

ng thi n cn nh ngha cu trc lin ni gia nhng k thut ny vi nhau. J2EE

cn bao gm mt sc t ch tn ti trong cc thnh phn ca n. Nhng thnh phn

ny bao gm Enterprise JavaBean (ch th Bean dng trong kinh doanh), servlet, portlet,

JSP v mt scc k thut v dch v mng (web service). iu ny cho php nh pht

trin to ra mt chng trnh ng dng kinh doanh (enterprise application) khng nhng

ch c th s dng trn cc nn tng khc nhau, m cn c th khuch trng thnh

nhng qui m ln hn v tch hp vi nhng cng ngh k tha ttrc y. Trnh ch

ca Java EE c th qun xuyn cc giao dch (transactions), nhim v bo an (security),

chc nng a bin s bt nh lng (arity), tnh qui m ha (scalability), stng tranh

(concurrency) v qun l cc thnh phn c trin khai trong mi trng ca n.

II/ J2EE Framework : Struts2 , Hibernate


9/34

9

1/ Struts2

a/ Gii thiu

Apache Struts (trc y l thuc d n Apache Jakarta, Struts by gil mt dn c

lp) l mt b khung m ngun mcho vic pht trin cc ng dng web bng J2EE. N

s dng v mrng Java Servlet API gip cho cc nh pht trin p dng kin trc

MVC (Model-view-controller). Struts ra i bi Craig McClanahan v cng hin cho T

chc Apache vo thng 5, 2000.

B khung (framework) cho php thit k v hin thc cc ng dng web qui m ln c

thc m nhim bi nhiu nhm khc nhau. C thhn, cc nh thit k trang, cc

nh pht trin thnh phn v cc nh pht trin khc c th x l phn vic ca h mt

cch trnh t v c lp. N h tr I18N (h tr quc t), mt th vin th ty bin

phong ph, hin th theo dng lt gch v kim chng ni dng (form validation). N

cng h tr nhiu lp hin th khc nhau (presentation layers), bao gm JSP,

XML/XSLT, JavaServer Faces (JSF), v Velocity, cng nh nhiu lp m hnh khc

nhau, bao gm JavaBeans v EJB.

Struts 2 l mt phin bn nng cp so vi framework Struts truyn thng , Struts v

webwork kt hp vi nhau pht trin nn Struts 2 Framework. Struts 2 Framework

rt thch hp v d dng mrng pht trin cc ng dng web vi mc khc nhau.

Struts 2 c nhng thay i ng k, to iu kin cho vic pht trin ng dng web d

dng nhanh chng, gim thiu thi gian vit code v hiu quhn. Vc bn th Struts 2

vn l MVC c tch hp thm nhiu h trtcc framework khc nh Dojo (Ajax ) ,

JasperReport ,

b/ Hot ng


10/34

10

Quy trnh hot ng ca Struts 2 :

1)Ngi s dng gi yu cu n server yu cu mt s ti nguyn ca ng dng

2)Biu khin lc (FilterDispatcher) xem xt yu cu v sau xc nh mt Action

thch hp

3)Cc b chn (Interceptors) c ng dng: cc cu hnh b chn p dng cho cc chc

nng chung nh: lung cng vic, thm nh, ti file c tng ng dng vo yu

cu4)Thc thi Action: sau khi phng thc action c thc thi thc hin cc hot ng

lin quan n c sd liu nh sp xp hoc nhn d liu tc sd liu

5)Sinh kt qu

6)Sau kt qu yu cu c tr v thng qua b chn theo chiu ngc li. Kt qu

tr v cho php chng ta thc hin thu dn hoc thm qu trnh x l

7)Hin th kt qucho ngi s dng: vic iu khin cui cng c tr v cho trnh

cha servlet, n s gi kt qu tr v cho trnh duyt ca ngi s dng


11/34

11

Action ContextCleanUp filter: l mt ty chn v n c s dng khi tch hp vi cc

cng nghkhc nh SiteMash Plugin

FilterDispatcher: tip n, FilterDispatcher (biu khin lc) c gi, n quay li s

dng ActionMapper xc nh Action no c triu gi. Nu action c yu cu

c triu gi th FilterDispatcher y nhim vic iu khin li cho ActionProxy.

ActionProxy:ActionProxy nhn sgip t b qun l cu hnh file (Configuration

Files manager), c khi to tfile struts.xml. Sau ActionProxy to ra mtActionInvocation, thc thi (implement) t mu lnh. ActionInvocation x l triu gi b

chn (Interceptors) nu n c cu hnh v sau triu gi Action. ActionInvocation

tm kim kt qu thch hp, sau kt quc thc thi, n triu gi vic sinh ra trang

cc JSP hoc cc mu.


12/34

12

Sau , cc Interceptor c thc thi mt ln na theo th tngc li. Vic tr v kt

qu cui cng thng qua cc b lc c cu hnh trong file web.xml. Nu b lc

ActionContextCleanUp c cu hnh, th FilterDispatcher khng dn dp ThreadLocal

ActionContext. Nu b lc ActionContextCleanUp khng c th FilterDispatcher s dn

dp tt c cc ThreadLocal tn ti

2/ Hibernate

a/ Gii thiu

Hibernate l mt framework c mt sinh vin Chu u ngh ra n gin ha , t

ng ha qu trnh kt ni v thao tc trn C SD Liu (CSDL)

Da vo nhng cu trc nh ngha bng file .xml thc hin vic to CSDL, bng, cc

rng buc trn bng, cc quan h tham chiu ...

iu c ngha l vic kt ni ti CSDL khi dng Hibernate gip ngi lp trnh t

quan tm hn ti vic thao tc trn d liu m quan tm ti nhng rng buc d liu

nhiu hn, thng qua cc annotation(quy c t tn) c nh ngha, lm cho vic

thao tc CSDL hng i tng hon ton

Dng Hibernate l dng cc file config v cc lp lin kt to CSDL ch ko dng

tay hay lp DAO bnh thng

Hibernate gip chng ta pht trin cc lp dng lu tr d liu theo cch thc hng

i tng: association, inheritance, polymorphism, composition v collections

Hibernate cho php bn thc hin cc cu truy vn d liu bng cch s dng ngn ng

SQL mrng ca Hibernate (HQL) hoc l ngn ng SQL nguyn thy cng nh l s

dng cc API.


13/34

13

Hibernate c cp giy php LGPL (Lesser GNU Public License). Theo , ta c th

dng Hibernate trong cc d n open source hoc cc dn thng mi (commercial).

b/ Hot ng

V mt vt l, theo m hnh d liu quan h, d liu ca chng ta s bao gm cc thc

th (entity) c quan h vi nhau. V khi hin thc c thhn mc database, chng s

c i din bi cc table, bi cc rng buc kha ngoi, kha chnh, Hibernate

cng nh vy.

Mi table trong database l mt object trong Hibernate. Do , ta cn c mt java object

cho mi table trong database. Cc java object ny s c cc getters / setters v mt s

ngoi ltheo quy c ca Hibernate.

Tip theo Hibernate bit mt object c nh x (mapping) nh th no vi table

trong database, Hibernate yu cu ta cung cp tp tin c t gi l mapping file. Theo

quy c ca Hibernate, cc mapping file ny c ui l .hbm.xml v phi hp l viDTD (Document Type Definition) m Hibernate a ra. Trong cc mapping file ny,

ta sc t cc mi quan h gia property ca object vi field ca table. Tc l ta gip

cho Hibernate hiu mi quan h gia cc object tng ng nh th no vi mi quan

h gia cc field.

Tip theo na, ta cn c 1 tp tin Hibernate bt u: hibernate.cfg.xml. C th ni tp

tin ny c load ln u tin khi bn khi ng Hibernate.

Tp tin hibernate.cfg.xml dng nh ngha cc kt ni CSDL cho ng dng :


14/34

14

o hibernate.connection.driver_class

o hibernate.connection.url

o hibernate.connection.username

o hibernate.connection.password

o hibernate.connection.pool_size

o show_sql

Tng t nh hibernate.cfg.xml, hibernate.properties cng khai bo cc thng s,

nhng hibernate.properties thng c kt hp vi spring config.

Cc tp tin nh x : name_class.hbm.xml .Bn trong ta cu hnh nhng thnh phn d

liu tng ng gia java object v entity nh column , primary key , relationship one-to-

many many-to-many one-to-one.c bit Hibernate cn cho php ta cu hnh nh x

(mapping) quan h many gia cc entity thnh cc kiu d liu collections trong java

s dng Hibernate trong ng dng J2EE :

Ta gi i t

ng SessionFactory , load cc file cu hnh Hibernate ln server

sn

sng cho vic gi ly d liu t CSDL . V vic khi to i tng SessionFactory kh

chm , v chc np 1 ln lc khi to .Sau ny ta khng cn khi to m ch cn gi

cc Sessions ly d liu

SessionFactory sessionFactory = new

Configuration().configure().buildSessionFactory();

Khi ta c nhu cu ly d liu hay lu d liu , ta cn to session t SessionFactory v

thao tc CSDL thng qua i tng session


15/34

15

//open a session

Session session = sessionFactory.openSession();

//begin a transaction

Transaction tx = session.beginTransaction();

//

//do sth with session here

//

//commit

tx.commit();

//close session

session.close();

Sau khi ta thao tc xong th cn ng session tit kim ti nguyn , cng nh khngnh hng n ln thao tc session ln sau .Bn trn l nhng khi nim , cng nh ccs dng c bn nht s dng Hibernate

3/Bi tp v d ng dng framework

Bi tp c giao lm mt ng dng da trn framework struts2 v hibernate

Sau y l m hnh CSDL s s dng Hibernate mapping a vo ng dng s dng:


16/34

16

BANGPHANQUYEN

PK MaPQ

TenPQ

MotaPQTrangthaiPQ

PHONGBAN

PK MaPB

TenPBDienthoaiPB

TrangthaiPB

NHANVIEN

PK MaNV

TenNVNgaysinhNVDiachiNV

DienthoaiNVChucvuEmailNVTrinhdoNVTendangnhap

MatkhauNVNgaycaptaikhoanNguoicaptaikhoanTrangthaiNV

Tng ng trong ng dng Hibernate s to ra 3 file config v 3 java object tng ng :

Bn cnh , s dng cc lp DAO khi sessionFactory v Session kt ni CSDL


17/34

17

Nh vy Hibernate x l xong phn CSDL , tip n ta sdng Struts2 xy dng

cc ng dng CRUD (create,update,delete) c bn trn cc i tng

Ta cc action trong package action v nh ngha cc action dnh cho cc i tng :

Kn ta cu hnh trong struts.xml thc thi nhng action

Ta chn namespace,package , actionClass , method thc thi cho cc action , result tr v

cho tng action.nh ngha name cho action c gi


18/34

18

Ta s vit code cho tng action , nu trong action cn gi CSDL th s gi cc class

DAO m ban u ta define cho Hibernate

Bn trn l nhng iu c bn nht trong vic s dng , trong qu trnh vit ng dng

nghin cu thm mt stnh nng ca struts 2 v hibernate

Sau y l giao din ca ng dng :


19/34

19

Giao din danh sch nhn vin

Giao din chi tit nhn vin


20/34

20

Giao din tm kim theo cc tiu ch

Tuy ng dng pht trin bng 2 framework trn kh phc tp v tn nhiu cng sc ,nhng nu trong nhng d n ln th n gip chng ta pht trin ng dng nhanh hn ,

r rng hn.

II/ Portal / Portlets

1/Gii thiu v Portal , Portlets

a/ Portal :

Portal hay Cng thng tin in tc hiu nh l mt trang web xut pht m t

ngi s dng c th d dng truy xut cc trang web v cc dch v thng tin khc trn

mng my tnh. L im ch qui t hu ht cc thng tin v dch vcho ngi s dng


21/34

21

cn, l im ch n thc s. Thng tin v dch vc phn loi nhm thun tin cho

tm kim v hn ch vi lp cc thng tin. L im ch qui t hu ht cc thng tin v

dch vcho ngi s dng cn, l im ch n thc s. Thng tin v dch vc

phn loi nhm thun tin cho tm kim v hn ch vi lp cc thng tin.

Hin nay c kh nhiu loi Portal: Portal cng cng, Portal ring ca cng ty hoc t

chc, Portal chuyn ngnh..., v gn y cn xut hin cc siu Portal l Portal dn n

cc Portal mc di. Hy ch cp n cc Portal cng cng. Khc vi cc Portal

chuyn ngnh thng tp trung vo mt lnh vc hp nhng su hn, thng tin do mt

Portal cng cng cung cp bao trm nhiu lnh vc, hoc nhiu ch trong mt lnh

vc ln nh kinh t, khoa hc, cng ngh, y hc, th thao, m nhc... Portal tch hp

thng tin t rt nhiu ngun khc nhau. V d mt Portal tm quc gia phi tch hp

thng tin ttrung ng v cc b, ngnh, a phng. Portal ca mt thnh ph phi tch

hp c thng tin t cc qun, huyn v cc s, ban, ngnh.

Xy dng Portal l qu trnh rt phc tp v i hi u t lu di. Nhn chung, phi chia

thnh nhiu b

c: lp k

ho

ch, th

c hi

n th im, nh gi, iu ch

nh, duy tr, pht

trin v mrng... Mt yu t khng th thiu l phi c s cho tp trung v phi

hp cht ch gia cc thnh vin tham gia trong h thng Portal ngay tu m bo

tnh tng thch v hp chun ca cc thnh phn Portal.

Cc tnh nng m Portal cn phi c :

C nhn ha (Personalization) : thng tin khc nhau cho cc loi i tng sdng khc nhau

Tch h p nhiu loi thng tin (Content aggregation) : ni dung thng tin tnhiu ngun khc nhau cho nhiu i tng

Htrnhiu mi trng hin ththng tin (Multidevice support)


22/34

22

ng nhp mt ln (Single Sign OnSSO) : cc dch v ca portal ly thng tinvngi dng khi hot ng m khng phi yu cu ngi dng phi ng nhp

li mi khi c yu cu.

Qu n trportal (Portal administration) : xc nh cch thc hin th thng tincho ngi dng cui

Qu n tr ngi dng (Portal user management) xc nh cch thc hin ththng tin cho ngi dng cui

Xut bn thng tin (Content syndication) : cung cp cho ngi dng thng quacc phng php hoc giao thc (protocol) mt cch thch hp nh XML , RSS ,

RDF

b/ Portlets :

l mt web component c dng trin khai vo trong mt portlet container v to ra

ni dung ng. V mt cng ngh, portlet l mt class vit theo chun giao din ca

javax.portlet.Portlet interface v c ng gi, trin khai trong mt file .war v trong

mt portlet container.

Portlet c my im ging servlet l :

- c qun l bi mt container chuyn dng.

- Khnng x l request v sinh ra ni dung ng.

- Vng i c qun l bi container

- Lm vic vi client thng qua m hnh request/response.

C mt vi im khc l:

- Portlet ch to ra nhng mnh ni dung ch khng to ra mt trang web hon

chnh.

- Portlet khng c URL trc tip.

- Portlet khng b b buc vo ni dung to ra. Ni dung to ra c th l html/text


23/34

23

Portlet cung cp thm mt s hm chc nng sau:

- Persistent storage for preferences : Portlet cung cp mt i tng

PortletPreferences dnh cho vic lu tr nhng d liu ca ngi s dng. Mt v d v

d liu m portlet c thlu li l look and feel ca mt portlet cho tng user. Nhng d

liu ny sc lu tr v kho d liu ng b. Chng khng b mt i khi khi ng

li server. L mt nh pht trin bn khng cn phi suy ngh vcch lu tr ca chng.

- Request processing : So vi servlet th portlet c mt b x l request phc tp

hn. Nu trong servlet, vng i ca mt request c gi gn trong method service ()

th vng i ca mt request trong mt portlet c chia ra lm hai giai on (phases).

Giai on mt l xl request v giai on hai l tr li kt qu.

Giai on mt : V trong mt trang web portal, chng ta c th c nhiu portlet nn h

iu hnh portal s phi tm ra portlet no m ngi s dng gi request ti v gi

phng thc processAction. Tt cc cc business logic ca mt portlet thng c x l

trong giai on ny. Kt qu tr vc cha trong portlet session hay actionResponse.

Giai on hai: Portal si qua tng portlet trong trang web portal v gi phng thc

render.

giai o

n ny, mt portlet th

ng ly k

t qu

ch

a trong portlet session hay

response v chuyn kt qu ny thnh nhng mng html m ngi s dng c thc

hiu.

- Portlet modes: n gin ha cng vic pht trin portlet cho nh lp trnh cng

nh vic s dng portlet cho ngi dng, chun portlet chia portlet content ra nhiu

trng thi (mode) . Mi mt trng thi sc lm nhng cng vic nht nh. V d khi

mt ngi s dng chuyn ti mt portlet v h khng bit s dng h c th chuyn

qua mode trgip (help) v c nhng hng dn s dng. Sau quay trli modeview s dng. Trong chun portlet chng ta thng tm thy 3 modes bt buc m nh

pht trin portal phi h tr l :mode view,mode help,mode edit.

Mode help: a ra nhng hng dn s dng cho ngi dng.

Mode view: Hin th ni dung ng dng ca portlet.


24/34

24

Mode edit:Cho php ngi dng cu hnh portlet lm vic theo mun ca h. V d,

khi ngi s dng chuyn ti mail portlet, h phi ni cho portlet bit h mun ly mail

message t mail server no v user name, password ra sao. Tt c nhng thng tin nh

vy thng c lm trong portlet edit mode v lu li trong Portlet References.

Ngoi ra chun portlet cn khuyn khch cc nh pht trin portal nn h trnhng

mode nh admin/config, mode ny ch cho php nhng power user nh moderator,

admin truy nhp. Mt v dcho mode ny l user portlet, trong ngi s dng bnh

thng c thvo view mode tm ra nhng thng tin ca mt user khc . Nhng mt

admin hay moderator c th vo admin mode ca user portlet xa hay sa nhng

thng tin.

Mt portal h tradmin mode sn gin cng vic lp trnh cho mt lp trnh vin rt

nhiu v h khng phi lo lng v vic qun l ngi dng cho portlet. Nhng nhng lp

trnh vin cng cn phi lu trong vic s dng nhng mode mrng ny v c th

portal khng h tr. Vic ny ng ngha vi vic th phn cho portlet ca h s b thu

hp.

- Window state : L trng thi ca sxc nh khng gian xut hin ca ni dung

c t

o ra b

i portlet trong m

t trang c

a portal. N

u nh bn click vo nt maximize,

portlet s hin th ton bv khi khng gian lm vic ca bn s ch c mt portlet .

Nu bn click vo nt minimized, portlet s ch hin ththanh tiu . L mt nh pht

trin, bn s ty bin ni dung hin th thch hp vi bn.

User information: Thng thng, portlet cung cp ni dung c tnh c nhn do nhng

yu cu tngi s dng. lm vic ny, chng cn i hi nhng truy cp vo nhng

thng s ca ngi s dng nh tn, email, sin thoi,Portlet API cung cp khi

nim user attributes lm vic ny. Lp trnh vin c th truy cp vo nhng thng tinny theo nhng cch chun v trch nhim ca qun trl a nhng thng s vo

kho thng tin thc ca ngi s dng (thng l mt LDAP server).

Trn y l s lc mt s nhng c trng c bn ca portlet


25/34

25

2/Hot ng

a/ Portal : C rt nhiu loi Open Source Portal cng nh Commercial Portal trn th

gii .Trong ni dung thc tp ti c quan th c sn ng dng IBM Portal Websphere

.

b/ Portlets :

Ging ng dng Web

- C th bao gm servlets, JSPs, .classes, files JAR (java archives), v cc file tnhkhc

- C th mc WEB-INF/classes lu gi cc lp c lp c th ti bi classloader(cc class portlet)

- C th mc WEB-INF/lib lu gi Java Archives (JAR) c th ti biclassloader.

- C file web.xml m tng dng web- C file porlet.xml m t vng dng portlet (gm title , cc mode , )- ng dng c ng gi thnh file WAR v a vo Portal s dng


26/34

26

Portlets c Container load ln v hin th trn portal

C 2 loi request c a cho portlet : action request v render request

Request c dn bi cc URL tng ng : action URL v render URL

Action Request c gi n phng thc processAction()v Render Request c gi

n render() trong portlet

Khc nhau gia Action request v Render Request


27/34

27

Action Request : hnh ng thay i trng thi ca Portlet Render Request : pht sinh ni dung ca Portlet da trn trng thi hin ti

Generic Portlet :

L 1 Abstract class c implements interface portlet Cc nh pht trin c th to nn Portlet bng cc k tha Generic Portlet Generic Portlet k tha phng thc render() , xc nh mode ca portlet t

gi cc phng thc thch hp , tng ng vi cc mode : doView() , doEdit() ,

doHelp()

Khi xy dng 1 portlet , ta s k tha abstract class GenericPortlet

public class HelloWorldPortlet extends GenericPortlet {

/**

* The portlet's main view prints "Hello, World"

*/

public void doView(RenderRequest request, RenderResponse response)

throws PortletException, IOException

{

PrintWriter out = response.getWriter();

out.println("Hello, World");}

}

Phng thc doView() sc gi khi portal load li , thc cht khi portal load li th s

thc thi renderRequest , trong genericPortlet th Phuong thc doView sc gi khi

renderRequest c truyn

public void processAction(ActionRequest request, ActionResponse response)throws PortletException, IOException

{

// get the values submitted with the form

String identity = request.getParameter("identity");


28/34

28

String color = request.getParameter("color");

}

Khi cn c nhu cu cn thay i trng thi ca portlet th portal s gi actionRequest ncho portlet , lc phng thc processAction() ca genericPortlet sc gi .Sau khi

phng thc processAction() thc hin xong th phng thc doView() ca nhng

portlet khc cng c gi (cportlet )

Trn y l nhng c bn xy dng portlet , p dng nhng c bn trn xy dng

nn ng dng portlets chy trn portal

3/ Bi tp v d ng dng PortletsBi tp c giao l xy dng c bn mt BookmarkPortlet dng lu nh du cc

trang web

Trong modeView ca portlet s hin thdanh sch cc bookmark , modeEdit dng

thm v chnh sa cc portlet c sn.Trong ng dng th danh sch bookmark sc

lu trong kho cha session trong portlet

Trc tin ta xy dng java objectbookmark cha cc bookmark

K tip l to class portlet c k tha trong GenericPortlet


29/34

29

Khai bo v portlet trong file portlet.xml

Khi ngi dng lm vic vi portlet th phng thc doView s c , y ta s

dispatch doView sang trang jsp hin th

Trong phn jsp , ta ly d liu t session ra v hin th


30/34


31/34

31

Trong phng thc ta sxc nh action no c thc thi , y l action edit v

add new

Sau y giao din ca ng dngSau khi portlet c hon thnh sc ng thnh file war v up ln ng dng portal

Upload file war ln portal


32/34

32

Portlet trn portal s c dng :

modeView ca ng dng .chuyn sang modeEdit , ta chn Personalize

Giao din thm bookmark

Trli giao din modeView , ta chn back


33/34

33

Giao din sau khi thm dliu

Load dliu ln khi chn edit

ng dng Portal/Portlet kh phc tp , trong qu trnh xy dng cn nhiu thi gian

nghin cu s dng ti a ht nhng tnh nng ca n.Bn trn l nhng c bn nht

trong qu trnh xy dng ng dng Portal/Portlet


34/34

Phn 4: KT QUT CQua qu trnh thc tp ti c quan , em hc tp c nhiu iu quan trng v b ch

V kin thc chuyn mn , em c hng dn , tm hiu , v xy dng nn ng dng

s dng cc cng ngh mi nh struts 2 , hibernate , services , portal/ portlets , t

nng cao khnng chuyn mn ca c nhn. Sau ny c th s dng nhng kin thc

bch phc vc cho vic xy dng cc ng dng trong d n ca c quan

Vmi trng lm vic thc t, em c lm vic trong mi trng lm vic thc t

, nh mt nhn vin chnh thc , theo quy nh lm vic ca c quan ra . c tham

gia lm vic nhm vi ngi hng dn c kinh nghim , v c hng dn nhng

quy tc chung trong lm vic nhm vi nhau. t tng kinh nghim v khnng lm

vic ng i

Mt ln na em xin cm n nh trng cng nh c quan thc tp to c hi cho sinhvin chng em c tip cn v lm vic trong mi trng thc t.

bao cao thu viec ciren

Documents