1. Entity class
package domain;
public class user {
private int id;
private String username;
private String password;
@Override
public String toString() {
return "user [id=" + id + ", username=" + username + ", password=" + password + "]";
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}
2.User.hbm.xml
Role: configure mapping, generate primary key
<!-- Mapping of configuration class and table structure-->
<class name="domain.user" table="user">
<!-- The configuration id
sees the name attribute, and the JavaBean attribute
sees the column attribute, which is a table Fields of the structure
-->
<id name="id" column="id">
<!-- Primary key generation strategy-->
<generator class="native"/>
</id> <!-- Configure other Properties --> <property name="username" column="username" type="string"></property> <property name="password" column="password" type="string"></property>
</class>
3.hibernate.cfg.xml
Role: establish a connection with the database
<!-- Remember: first configure the SessionFactory tag, a database corresponds to a SessionFactory tag-->
<session-factory> <!-- There are 5 parameters that must be configured, 4 parameters, the dialect of the database --> < property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql:///hibernate_day01</property> <property name= "hibernate.connection.username">root</property> <property name="hibernate.connection.password">123</property> <!-- database dialect--> <property name="hibernate.dialect"> org.hibernate.dialect.MySQLDialect</property> <!-- Optional configuration --> <!-- Display SQL statement, display in console --> <property name="hibernate.show_sql">true</property> <!-- Format SQL statement--> <property name="hibernate.format_sql">true</property> <!-- Generate database table structure
update: If there is no table structure, create a table structure. If it exists, it will not be created, add data
-->
<property name="hibernate.hbm2ddl.auto">update</property> <!-- mapping configuration file, you need to import the mapping configuration file--> <mapping resource= "domain/User.hbm.xml"/>
</session-factory>
4.demo1 test class, hibernate entry to store data
package dao;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import domain.user;
public class demo1 {public static void main(String[] args) {
//Read configuration file
Configuration conf= new Configuration().configure();
//Create sessionFactory factory
SessionFactory sf=conf.buildSessionFactory();
//Open session
Session session=sf.openSession();
//Create transaction
Transaction tx=null; tx=session.beginTransaction();//Start //Persistence try{ user u=new user(); u.setUsername("xu "); u.setPassword("123"); session.save(u); tx.commit(); }catch(Exception e){ if(tx!=null){ tx.rollback();} e.printStackTrace (); }finally{ session.close();
}
}
}
5. Test results
