Using Hibernate in a Web Application Netbean6 5 and 6 7

8/10/2019 Using Hibernate in a Web Application Netbean6 5 and 6 7

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Using Hibernate in a Web Application

In this tutorial, you use the NetBeans IDE to create and deploy a webapplication that displays data from a database !he web application

uses the Hibernate framewor" as the persistence layer for retrie#ingand storing plain old $a#a ob%ects &'($(s) to a relational databaseHibernate is framewor" that pro#ides tools for ob%ect relationalmapping &(*+) !he tutorial demonstrates how to add support for the

Hibernate framewor" to the IDE and create the necessary Hibernatefiles After creating the $a#a ob%ects and configuring the application touse Hibernate, you add isual Web $-. components to a web page todisplay the data

Before starting this tutorial you may want to familiari/e yourself with

using HibernateHibernate documentation at hibernateorg

Note.!his tutorial uses NetBeans IDE 01 If you are using NetBeans

IDE 02, please see Using Hibernate in a Web Application in NetBeansIDE 02

Contents

3reating the Database

3reating the Web Application 'ro%ect

+odifying the Hibernate 3onfiguration .ile

3reating the HibernateUtil.java Hibernate Helper .ile

4enerating Hibernate +apping .iles and $a#a 3lasses

3reating the FilmHelper.java Helper 3lass3reating the 3lass

Enumerating .ilm !itles and *etrie#ing Actors Using an H56

5uery

Adding Additional Helper +ethods

3reating the Web 'ages

+odifying index.jsp

3reating browse.jsp

*unning the 'ro%ect
http://www.hibernate.org/http://netbeans.org/kb/65/web/hibernate-webapp.htmlhttp://netbeans.org/kb/65/web/hibernate-webapp.htmlhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#01http://netbeans.org/kb/docs/web/hibernate-webapp.html#02http://netbeans.org/kb/docs/web/hibernate-webapp.html#03http://netbeans.org/kb/docs/web/hibernate-webapp.html#04http://netbeans.org/kb/docs/web/hibernate-webapp.html#04http://netbeans.org/kb/docs/web/hibernate-webapp.html#04http://netbeans.org/kb/docs/web/hibernate-webapp.html#04http://netbeans.org/kb/docs/web/hibernate-webapp.html#05http://netbeans.org/kb/docs/web/hibernate-webapp.html#06http://netbeans.org/kb/docs/web/hibernate-webapp.html#06http://netbeans.org/kb/docs/web/hibernate-webapp.html#06http://netbeans.org/kb/docs/web/hibernate-webapp.html#06http://netbeans.org/kb/docs/web/hibernate-webapp.html#06ahttp://netbeans.org/kb/docs/web/hibernate-webapp.html#06bhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#06bhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#06dhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#07http://netbeans.org/kb/docs/web/hibernate-webapp.html#07ahttp://netbeans.org/kb/docs/web/hibernate-webapp.html#07ahttp://netbeans.org/kb/docs/web/hibernate-webapp.html#07bhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#07bhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#08http://netbeans.org/kb/65/web/hibernate-webapp.htmlhttp://netbeans.org/kb/65/web/hibernate-webapp.htmlhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#01http://netbeans.org/kb/docs/web/hibernate-webapp.html#02http://netbeans.org/kb/docs/web/hibernate-webapp.html#03http://netbeans.org/kb/docs/web/hibernate-webapp.html#04http://netbeans.org/kb/docs/web/hibernate-webapp.html#05http://netbeans.org/kb/docs/web/hibernate-webapp.html#06http://netbeans.org/kb/docs/web/hibernate-webapp.html#06ahttp://netbeans.org/kb/docs/web/hibernate-webapp.html#06bhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#06bhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#06dhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#07http://netbeans.org/kb/docs/web/hibernate-webapp.html#07ahttp://netbeans.org/kb/docs/web/hibernate-webapp.html#07bhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#08http://www.hibernate.org/


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Downloading the -olution 'ro%ect

To follow this tutorial, you need the following software and

resources.

Software or Resource Version Required

NetBeans IDE 01, $a#a #ersion

$a#a De#elopment 7it &$D7) ersion 0 or #ersion 2

Apache !omcat 089:

+y-56 database ser#er ersion 2;

-a"ila Database 'lugin a#ailable from update center

Note.!he Apache !omcat webser#er is included with the bundleddownload of the IDE Alternati#ely, you can use the bundled 4lass.ishApplication -er#er

clic"ing the+y-56 -er#er node and choosing -tart

? *ight>clic" the +y-56 -er#er node and choose 3reate Database
http://netbeans.org/kb/docs/web/hibernate-webapp.html#08ahttp://www.netbeans.org/downloads/index.htmlhttp://java.sun.com/javase/downloads/index.jsphttp://www.mysql.com/http://kenai.com/projects/netbeans-samples/downloads/download/Samples/Web/DVDStore.ziphttp://netbeans.org/kb/docs/ide/mysql.htmlhttp://netbeans.org/kb/docs/web/hibernate-webapp.html#08ahttp://www.netbeans.org/downloads/index.htmlhttp://java.sun.com/javase/downloads/index.jsphttp://www.mysql.com/http://kenai.com/projects/netbeans-samples/downloads/download/Samples/Web/DVDStore.ziphttp://netbeans.org/kb/docs/ide/mysql.html


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@ -elect the -a"ila database from the New Database Name drop

down list in the 3reate +y-56 Database dialog bo; 3lic" (7

When you clic" (7 a -a"ila node appears under the +y-56 -er#ernode

2 *ight>clic" the -a"ila node and choose 3onnect

When you clic" 3onnect a database connection node for the -a"iladatabase &jdbc:mysql://localhost:330/sakila !usernameon

"e#a$lt%) is listed under the Databases node When a connection is

open you can #iew the data in the database by e;panding theconnection node

3reating the Web Application 'ro%ect

In this e;ercise you will create a web application pro%ect and add the

Hibernate libraries to the pro%ect When you create the pro%ect, you willselect Hibernate in the .ramewor"s panel of the New 'ro%ect wi/ard

and specify the database9 3hoose .ile New 'ro%ect &3trl>-hift>N) -elect Web Application

from the $a#a Web category and clic" Ne;t

= !ype DVDStorefor the pro%ect name and set the pro%ect location

? Deselect the Use Dedicated .older option, if selected.or this tutorial there is little reason to copy pro%ect libraries to a

dedicated folder because you will not need to share libraries withother users

3lic" Ne;t

@ -et the ser#er to Apache !omcat 089: and set the $a#a EEersion to $a#a EE 2 3lic" Ne;t

2 -elect the Hibernate ?=2 chec"bo;

0 -elect the sa"ila database from the Database 3onnection drop

down list 3lic" .inish


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Note:If the sa"ila database is not a#ailable as an option in the

.ramewor"s panel in the wi/ard, chec" to see if the connection is listedunder the Databases node in the -er#ices window If the connection is

not there, you need to create the database connection

When you clic" .inish, the IDE creates the web application pro%ect andopens the hibernate.c#&.xmlfile and index.jspin the editor

If you e;pand the 6ibraries node in the 'ro%ects window, you can seethat the IDE added the Hibernate libraries to the pro%ect


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+odifying the Hibernate 3onfiguration .ile

When you create a new pro%ect that uses the Hibernate framewor", theIDE automatically creates the hibernate.c#&.xmlconfiguration file at

the root of the conte;t classpath of the application &in the .iles window,WEB>IN.classes) !he file is located under the 3onfiguration .iles noden the 'ro%ects window !he configuration file contains informationabout the database connection, resource mappings, and other

connection properties #iew editor,or edit the C+6 directly in the C+6 editorIn this e;ercise you will edit the default properties specifiedn hibernate.c#&.xmlto enable debug logging for -56 statements and

to enable Hibernates session conte;t management

9 (pen hibernate.c#&.xmlin the Design tab


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management

If you clic" the C+6 tab in the editor you can see the file in C+6#iew


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In this section you use the New .ile wi/ard to create the helper

class HibernateUtil.java

9 *ight>clic" the -ource 'ac"ages node and select New (ther toopen the New .ile wi/ard

= -elect Hibernate from the 3ategories list and HibernateUtil%a#afrom the .ile !ypes list 3lic" Ne;t

? !ype Hibernatetilfor the class name and d!drentalfor thepac"age 3lic" .inish

When you clic" .inish, HibernateUtil.javaopens in the editor


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and select code generation options &generate code that uses E$B ?

annotations, for e;ample)Note.!he IDE also has wi/ards to help you create indi#idual '($(s and

mapping files from scratch

3reating the Hibernate *e#erse Engineering .ile9 *ight>clic" the -ource 'ac"ages node in the 'ro%ects window and

choose New (ther to open the New .ile wi/ard

= -elect Hibernate *e#erse Engineering Wi/ard in the Hibernatecategory 3lic" Ne;t

? -pecify hibernate.reven&as the .ile Name and src/javafor the

.older 3lic" Ne;t

@ -elect hibernate.c#&.xmlfrom the 3onfiguration .ile drop downlist, if not selected

2 -elect the following tables from A#ailable !ables and clic" Add toadd the tables to -elected !ables

o actor

o category

o film

o filmFactor

o filmFcategory

o language

3lic" .inish


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!he wi/ard generates a hibernate.reven&.xmlre#erse engineering file

and opens the file in the editor


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0 -elect d!drentalfor the 'ac"age name 3lic" .inish

When you clic" .inish the IDE generates '($(s and Hibernate mappingfiles with the fields mapped to the columns specified

n hibernate.reven&.xml !he IDE also adds mapping entries

to hibernate.c#&.xml


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3reating the FilmHelper.javaHelper 3lass

clic" the dvdrentalsource pac"age node and select New

$a#a 3lass to open the New .ile wi/ard

. !ype &il'Hel*erfor the class name 3lic" .inish


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-. Adding the following code &in bold) to create a Hibernate session

. p$blic class FilmHelper 5

$.

/. Session session = null;0.

1. public FilmHelper() {

2. this.session =HibernateUtil.getSessionFactory().getCurrentSession();

+3. }

++.6

+. .i; your imports &or&.hibernate.ession) and sa#e your

changes


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If you clic" the -56 button you can see the eGui#alent -56 Gueryselect #ilm0'.#ilm'id as col'0'0' #rom sakila.#ilm#ilm0'

@ !ype the following Guery to retrie#e the records in the .ilm table

where the film id is between 988 and =88

#rom Film as #ilm where #ilm.#ilm7d between -00 and 800!he result window displays a list of records Now that you ha#e

tested that the Guery returns the desired results, you can use theGuery in the helper class

2 Add the following method &etFilm9itlesto FilmHelper.javato

retrie#e the films where the film id is between a certain rangespecified by the #ariables start7"and end7"

0 p$blic 1ist &etFilm9itlesint start7" int end7"4 5

1 1ist(Film* #ilm1ist + n$ll;: try 5

or&.hibernate.9ransaction tx +session.be&in9ransaction4;

98 $ery q + session.create$ery ,#rom Film as#ilm where #ilm.#ilm7d between


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9@ 6

92 ret$rn #ilm1ist;6

90 Add the following method &et?ctors@y7"that retrie#es the

actors in a particular film !he method constructs the Gueryusing #ilm7das the input #ariable

91 p$blic 1ist &et?ctors@y7"int #ilm7d45

9: 1ist(?ctor* actor1ist + n$ll;

9 try 5

=8 or&.hibernate.9ransaction tx +session.be&in9ransaction4;

=9 $ery q + session.create$ery ,#rom ?ctor as

actor where actor.actor7d in select#ilm?ctor.actor.actor7d #rom Film?ctor as #ilm?ctorwhere #ilm?ctor.#ilm.#ilm7d+


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#ilmAat.cate&ory.cate&ory7d #rom FilmAate&ory as #ilmAatwhere #ilmAat.#ilm.#ilm7d+


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?0 lan&$a&e + 1an&$a&e4 q.$niq$eBes$lt4;

?1 6 catch >xception e4 5

?: e.printtack9race4;

? 6

@8@9 ret$rn lan&$a&e.&etCame4;

6


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+3. int pre$-start* =+;

++. int pre$-en#* = +,;

+.

+-. int F-/0C1/*-C1U23 = +,,,;

+.+$. boolean /0C1/*-S34/3-5460 = 7alse;

+/. boolean /0C1/*-02*-5460 = 7alse;

+0.

+1. i7 (re8uest.get5arameter("starti#") 9= null) {

+2. start* =nteger.parsent(re8uest.get5arameter("starti#"));

3. }

+. i7 (re8uest.get5arameter("en#i#") 9= null) {. en#* =

nteger.parsent(re8uest.get5arameter("en#i#"));

-. }

.$. FilmHelper helper = ne: FilmHelper();

/. ist 7ilm3itles =helper.getFilm3itles(start*en#*);

0.1. i7(start* == +){

2. /0C1/*-S34/3-5460 = true;

-3. }

-+. i7(en#* == F-/0C1/*-C1U23){

-. /0C1/*-02*-5460 = true;

--. }

-.

-$. pre$-start* = start*+,;

-/. pre$-en#* = en#*+,;-0.-1. start* = en#*+;

-2. en#* = en#*+,;

3.

+. int 7ilm3itlesSi>e = 7ilm3itles.si>e();

.-. &

(/body*


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. Add the following &in bold) to generate the table to display

the retrie#ed items

$. int #ilm9itlesiGe + #ilm9itles.siGe4;

/.0. out.print("


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/. out.print("


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+. }

+$. &(/body*

+/. Add the following code &in bold) to call the methods

in FilmHelper.javato retrie#e the data for the film according tofilm ID

+0. #ilm7" +7nte&er.parse7ntreq$est.&etarameter,id,44;

+1. 6

+2. D*

3.+.


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0. int lang* =7ilm.getanguageGyanguage#().getanguage#().intalue();

1. String language = helper.getangGy*(lang*);

2. int 7ilmength = 7ilm.getength();$3. String 7ilm/ating = 7ilm.get/ating();

$+. String 7ilmIear = 7ilm.get/eleaseIear().toString();

$.$-. int rental*uration = (int)

7ilm.get/ental*uration();

$. 7loat rental/ate =7ilm.get/ental/ate().7loatalue();

$$.$/. String specialFeatures = 7ilm.getSpecialFeatures();

$0.$1. &

(/body*

$2. Add the following code &in bold) to generate the tabledisplaying the data for the film

/3. trin& specialFeat$res + #ilm.&etpecialFeat$res4;

/+. out.print("


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03. out.print("


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= In your browser, clic" +ore or the film title to

load browse.jspto #iew the film details

After testing that the application lists the film titles and displays thefilm details, you can add more functions .or e;ample, you can

create rent.jspto enable the user to rent the title

Date post:	02-Jun-2018
Category:	Documents
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Using Hibernate in a Web Application Netbean6 5 and 6 7

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