這一次先介紹相關的設定,有hibernate.cfg.xml , HibernateUtil.java
還有一個資料庫的java 物件 UserData.java
1.先產生一個Hibernate的設定檔,NetBeans有精靈可以幫助你
一般我都會再加兩個參數,讓Debug更容易些
hibernate.show_sql = true
hibernate.current_session_context_class = thread

	<?xml version="1.0" encoding="UTF-8"?>

<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/demo</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.connection.password">qwerfdsa</property>
    <property name="hibernate.current_session_context_class">thread</property>
  </session-factory>
</hibernate-configuration>

2.產生一個HibernateUtil 主要是去讀取config裡的參數產生Connection讓其他的程式使用
一樣NetBeans也有精靈可以快速產生,如下

	package demo;

import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.SessionFactory;

public class HibernateUtil {
    private static final SessionFactory sessionFactory;

    static {
        try {
            sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
}

3.接下第三步就是產生一個和資料庫一樣的java物件
注意變數的第一個字母要小寫

package demo;

public class UserData {
  private String userid;
  private String userpassword;
  private String username;

  public String getUserid() {
    return userid;
  }

  public void setUserid(String userid) {
    this.userid = userid;
  }

  public String getUsername() {
    return username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public String getUserpassword() {
    return userpassword;
  }

  public void setUserpassword(String userpassword) {
    this.userpassword = userpassword;
  }
  
}