基於XML配置文件實現的第一個hibernate小程序。
1.首先新建一個普通的java工程。
2.將oracle數據庫驅動包和實現hibernate的最小包導入到該工程中。
Oracle數據庫驅動包為:
Oracle 10g 10.2.0.4 JDBC_ojdbc14.jar
Hibernate的最小包為:
antlr-2.7.6.jar
commons-collections-3.1.jar
dom4j-1.6.1.jar
hibernate3.jar
javassist-3.4.GA.jar
jta-1.1.jar
slf4j-api-1.5.2.jar
slf4j-nop-1.5.2.jar
3.在src文件夾下建一個包名為com.neusoft.bean包,在該包下建立一個名為Person.java的文件,內容如下:
package com.neusoft.bean;
public class Person {
private int id;
private String name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
再在該包下建立名為Person.hbm.xml的Person.java映射文件,內容如下:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.neusoft.bean.Person" table="person">
<id name="id" column="person_ID">
<generator class="native" />
</id>
<property name="name" column="person_name" />
</class>
</hibernate-mapping>
4.在src包下建立名為com.neusoft.test的包,然後在該包下建立名為Test.java的測試類。內容為:
package com.neusoft.test;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.neusoft.bean.Person;
public class Test {
public static void main(String[] args) {
Person p = new Person();
p.setId(1);
p.setName("wjl");
Configuration cfg = new Configuration();
SessionFactory sf = cfg.configure().buildSessionFactory();
Session s = sf.openSession();
s.beginTransaction();
s.save(p);
s.getTransaction().commit();
s.close();
sf.close();
}
}
5. 在src文件夾下建立名為hibernate.cfg.xml的hibernate的配置文件。內容如下:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!– Database connection settings –>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:@192.168.1.102:1521:oracle</property>
<property name="connection.username">hr</property>
<property name="connection.password">hr</property>
<!– JDBC connection pool (use the built-in) –>
<property name="connection.pool_size">1</property>
<!– SQL dialect –>
<property name="dialect">org.hibernate.dialect.OracleDialect</property>
<!– Enable Hibernate's automatic session context management –>
<property name="current_session_context_class">thread</property>
<!– Disable the second-level cache –>
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!– Echo all executed SQL to stdout –>
<property name="show_sql">true</property>
<!– Drop and re-create the database schema on startup –>
<property name="hbm2ddl.auto">create</property>
<mapping resource="com/neusoft/bean/Person.hbm.xml"/>
</session-factory>
</hibernate-configuration>
6. 運行Test.java,控制臺將顯示如下內容:
Hibernate: select hibernate_sequence.nextval from dual
Hibernate: insert into person (person_name, person_ID) values (?, ?)
7.查看數據庫,將看到生成瞭person表,並插入瞭一條記錄。
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作者“極致書生”