package com.entity;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Student {    private int id;    private String name;    @Id    @GeneratedValue    public int getId() {return id;}    public void setId(int id) {this.id = id;}    @Column(name = "name", length = 20)    public String getName() {return name;}    public void setName(String name) {this.name = name;}}

package com;import java.util.List;import java.util.Properties;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;import com.entity.Student;public class HibernateUtil {    public static void main(String[] args) {        Properties m = new Properties();        m.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");        m.put("hibernate.connection.driver_class", "com.mysql.jdbc.Driver");          m.put("hibernate.connection.url", "jdbc:mysql://localhost:3306/db?useUnicode=true&characterEncoding=utf8");          m.put("hibernate.connection.username", "root");        m.put("hibernate.connection.password", "fengze");          m.put("hibernate.hbm2ddl.auto","update");                Properties o = new Properties();        o.put("hibernate.dialect", "org.hibernate.dialect.Oracle10gDialect");        o.put("hibernate.connection.driver_class", "oracle.jdbc.OracleDriver");          o.put("hibernate.connection.url", "jdbc:oracle:thin:@localhost:1521:ORCL");          o.put("hibernate.connection.username", "system");        o.put("hibernate.connection.password", "FengZe2012");          o.put("hibernate.hbm2ddl.auto","update");                Properties s = new Properties();        s.put("hibernate.dialect", "org.hibernate.dialect.SQLServer2005Dialect");        s.put("hibernate.connection.driver_class", "com.microsoft.sqlserver.jdbc.SQLServerDriver");          s.put("hibernate.connection.url", "jdbc:sqlserver://localhost:1433;databaseName=db");          s.put("hibernate.connection.username", "sa");        s.put("hibernate.connection.password", "fengze");          s.put("hibernate.hbm2ddl.auto","update");                //Configuration cfg = new Configuration().setProperties(m);        Configuration cfg = new Configuration().setProperties(s);        cfg.addAnnotatedClass(com.entity.Student.class);        ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build();        SessionFactory sf = cfg.buildSessionFactory(serviceRegistry);        Session session = sf.openSession();          //插入数据        Transaction tx = session.beginTransaction();        Student s1 = new Student();        s1.setName("张三丰");        session.save(s1);        tx.commit();                List<Student> stu = session.createQuery("from Student").list();        for(Student st : stu){            System.out.println(st.getName());        }        session.close();          sf.close();      }}