hibernate入门

导入jar包就不说了，但不可不做。

hibernate.cfg.xml的写法：

<?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">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

<session-factory>
<property name="myeclipse.connection.profile">
  mysql-hibernate-demo
</property>
<property name="connection.url">
  jdbc:mysql://localhost:3306/uf_demo_db
</property>
<property name="connection.username">root</property>
<property name="connection.password">pass</property>
<property name="connection.driver_class">
  com.mysql.jdbc.Driver
</property>
<property name="dialect">
  org.hibernate.dialect.MySQLDialect
</property>
<property name="show_sql">true</property>
<mapping resource="Book.hbm.xml" />
</session-factory>

</hibernate-configuration>

Book.hbm.xml的配置：

<?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">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="Book" table="book" catalog="uf_demo_db">
  <id name="id" type="java.lang.Integer">
   <column name="id" />
   <generator class="native"></generator>
  </id>
  <property name="name" type="java.lang.String">
   <column name="name" length="50" not-null="true"
    unique="true" />
  </property>
  <property name="author" type="java.lang.String">
   <column name="author" length="50" />
  </property>
  <property name="press" type="java.lang.String">
   <column name="press" length="50" />
  </property>
  <property name="price" type="java.lang.Double">
   <column name="price" precision="15" />
  </property>
</class>
</hibernate-mapping>

Book.java

public class Book implements java.io.Serializable {
private Integer id;
private String name;
private String author;
private String press;
private Double price;

public Book() {

}

public Book(String name) {
  this.name = name;
}

public Book(String name, String author, String press, Double price) {
  this.name = name;
  this.author = author;
  this.press = press;
  this.price = price;
}

public Integer getId() {
  return this.id;
}

public void setId(Integer id) {
  this.id = id;
}

public String getName() {
  return this.name;
}

public void setName(String name) {
  this.name = name;
}

public String getAuthor() {
  return this.author;
}

public void setAuthor(String author) {
  this.author = author;
}

public String getPress() {
  return this.press;
}

public void setPress(String press) {
  this.press = press;
}

public Double getPrice() {
  return this.price;
}

public void setPrice(Double price) {
  this.price = price;
}

}

TestOperateDb.java（使用）

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class TestOperateDb {
private SessionFactory factory;

public TestOperateDb() {
  Configuration config = new Configuration().configure();
  factory = config.buildSessionFactory();
}

public void add() {
  Book book = new Book();
  book.setName("java Basic");
  book.setAuthor("liming");
  book.setPress("Press");
  book.setPrice(30.00);
 
  Session session = factory.openSession();
  Transaction tx = session.beginTransaction();
  session.save(book);
  tx.commit();
  session.close();
  System.out.println("Add successfully.");
}

public static void main(String[] args) {
  TestOperateDb test = new TestOperateDb();
  test.add();
}

}

数据库字段：id   name author press price

• 0
• 0
• 0
• 0
• 0
• 0
• 0
• 0