hibernater 我的理解就是方便程序员用java来操纵数据库
代码作用:根据person类在数据库中创建相应的表
1.目录结构
2.源代码
2.1Person.java
package s1; public class Person { private String id; private String age; private String name; public Person() { } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } }
2.2 Person.hbm.xml
<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class name="s1.Person" table="person" > <id name="id" type="java.lang.String" length="20"></id> <property name="age" type="java.lang.String" length="20"></property> <property name="name" type="java.lang.String" length="20"></property> </class> </hibernate-mapping>
2.3 Hibernate.hbm.xml
<?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> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <property name="connection.url">jdbc:mysql://localhost:3306/first</property> <property name="connection.username">root</property> <property name="connection.password">admin</property> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hbm2ddl.auto">update</property> <mapping resource="s1/Person.hbm.xml" /> </session-factory> </hibernate-configuration>
2.4Main.java
package s2; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import s1.Person; public class Main { public static void main(String [] args){ new Main().test(); } public void test() { Configuration configuration =new Configuration(); configuration.configure(); Session session=configuration.buildSessionFactory().openSession();//创建session Transaction transaction = session.beginTransaction(); Person person=new Person(); person.setId("1"); person.setAge("19"); person.setName("zhangsan"); session.save(person); transaction.commit(); session.close(); } }