1. Download page
Http://in.relation.to/Bloggers/HibernateORM422FinalReleased
2. Unzip hibernate and copy all the jar packages under the required directory under the lib directory to the class loading path in our application. If it is a web application, put it under/WEB-INF/lib/.
3. If you need to use the database source, the c3p0 is also placed under/WEB-INF/lib/
4. Create a persistent class. Instances of this class will be mapped to the corresponding instance in the database by hibernate:
| The code is as follows: |
Copy code |
Package org. Rudiment. hibernate; Public class News
{
Private Integer id;
Private String title;
Private String content;
Public Integer getId (){
Return id;
}
Public void setId (Integer id ){
This. id = id;
}
Public String getTitle (){
Return title;
}
Public void setTitle (String title ){
This. title = title;
}
Public String getContent (){
Return content;
}
Public void setContent (String content ){
This. content = content;
}
} |
5. Configure the exclusive ing file News. hbm. xml for the News class.
| The code is as follows: |
Copy code |
<? Xml version = "1.0"?>
<! DOCTYPE hibernate-mapping PUBLIC "-// Hibernate/Hibernate Mapping DTD 3.0 // EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <Hibernate-mapping package = "org. Rudiment. hibernate">
<! -- The table corresponding to this News class is news_table -->
<Class name = "News" table = "news_table">
<! -- IDs in this class will be mapped to the primary key of the corresponding database as identifiers -->
<Id name = "id">
<Column name = "ID"/>
<Generator class = "native"/>
</Id>
<! -- The title in the declaration class News will be mapped to the database -->
<Property name = "title"/>
<! -- The content in the declaration class News will be mapped to the database -->
<Property name = "content"/>
</Class>
</Hibernate-mapping> |
6. hibernate framework configuration/WEB-INF/classes/hibernate. cfg. xml
| The code is as follows: |
Copy code |
<! DOCTYPE hibernate-configuration PUBLIC
"-// Hibernate/Hibernate Configuration DTD 3.0 // EN"
Http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd> <Hibernate-configuration>
<Session-factory>
<! -- Configure database dialect -->
<Property name = "hibernate. dialect"> org. hibernate. dialect. MySQLDialect </property>
<! -- Configure the database driver -->
<Property name = "hibernate. connection. driver_class"> com. mysql. jdbc. Driver </property>
<! -- Configure the database username -->
<Property name = "hibernate. connection. username"> root </property>
<! -- Configure the database password -->
<Property name = "hibernate. connection. password"> root </property>
<! -- Configure the database url -->
<Property name = "hibernate. connection. url"> jdbc: mysql: // localhost: 3306/failure </property>
<! -- Configure the maximum capacity of the data pool -->
<Property name = "hibernate. c3p0. max_size"> 20 </property>
<! -- Configure the minimum capacity of the data pool -->
<Property name = "hibernate. c3p0. min_size"> 1 </property>
<! -- Configure the timeout threshold for data links -->
<Property name = "hibernate. c3p0. timeout"> 5000 </property>
<! -- Display whether the executed SQL is printed in the background on the console -->
<Property name = "hibernate. show_ SQL"> true </property>
<! -- Whether to display printed SQL statements in a friendly format -->
<Property name = "hibernate. format_ SQL"> true </property>
<! -- Print some auxiliary comments -->
<Property name = "hibernate. use_ SQL _comments"> true </property> <Property name = "hibernate. c3p0. max_statements"> 100 </property>
<Property name = "hibernate. c3p0. idle_test_period"> 3000 </property>
<Property name = "hibernate. c3p0. acquire_increment"> 2 </property>
<Property name = "hibernate. c3p0. validate"> true </property>
<! -- Configure the data operation method -->
<Property name = "hbm2ddl. auto"> update </property>
<! -- Add the ing file of News above -->
<Mapping resource = "org/Rudiment/hibernate/News. hbm. xml"/>
</Session-factory>
</Hibernate-configuration> |
7. Write a class for testing:
| The code is as follows: |
Copy code |
Package org. Rudiment. hibernate; Import org. Rudiment. hibernate. News;
Import org. hibernate. Session;
Import org. hibernate. SessionFactory;
Import org. hibernate. Transaction;
Import org. hibernate. cfg. Configuration;
Import org. hibernate. service. ServiceRegistry;
Import org. hibernate. service. ServiceRegistryBuilder; Public class NewsManager
{
Public static void main (String [] args)
{
// Obtain the configuration
Configuration conf = new Configuration (). configure ();
// Obtain ServiceRegistry
ServiceRegistry sr = new ServiceRegistryBuilder ()
. ApplySettings (conf. getProperties ())
. BuildServiceRegistry ();
// Configure our SessionFactory
SessionFactory sf = conf. buildSessionFactory (sr );
// Obtain our Session
Session sess = sf. openSession ();
// Start our transaction
Transaction tx = sess. beginTransaction ();
News n = new News ();
N. setTitle ("ITkezhan ");
N. setContent ("IT Inn ");
// Save the persistent object
Sess. save (n );
// Submit the transaction
Tx. commit ();
// Close the Session
Sess. close ();
// Close SessionFactory
Sf. close ();
}
} |
8. After running NewsManager, you can see that there is a new table news_table in The hibernate database as follows: (create the hibernate database in MySQL in advance. Otherwise, the hibernate database will not be automatically created)
| The code is as follows: |
Copy code |
Mysql> use hibernate;
Database changed
Mysql> select * from news_table;
+ ---- + --------------- + ------------------------- +
| ID | title | content |
+ ---- + --------------- + ------------------------- +
| 1 | ITkezhan | IT inn |
+ ---- + --------------- + ------------------------- +
1 row in set (0.00 sec) |
