首先创建一个maven项目
创建成功后,进行创建数据库的表
CREATE TABLE BOOK(
ID INT AUTO_INCREMENT PRIMARY KEY,
NAME VARCHAR(20),
NUMBER int );
insert into BOOK(NAME,NUMBER) VALUES
('Java程序设计',10),
('数据结构',10),
('设计模式',10)
然后再刚刚创建的项目里创建一个类,该类名称、字段要与数据库的一样
必须注意使用的注释
package com.wbg.entity;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Book {
@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
Long id;
String name;
int number;
public Book() {
}
public Book(Long id, String name, int number) {
this.id = id;
this.name = name;
this.number = number;
}
public Long getBook_id() {
return id;
}
public void setBook_id(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
@Override
public String toString() {
return "Book{" +
"id=" + id +
", name='" + name + '\'' +
", number=" + number +
'}';
}
}
进行在pom.xml文件中添加依赖
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.3.6.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mariadb.jdbc/mariadb-java-client -->
<dependency>
<groupId>org.mariadb.jdbc</groupId>
<artifactId>mariadb-java-client</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
在resources资源文件夹目录下面创建一个hibernate.xml配置文件
<?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>
<!--数据库驱动-->
<property name="hibernate.connection.driver_class">org.mariadb.jdbc.Driver</property>
<!--连接-->
<property name="hibernate.connection.url">jdbc:mariadb://localhost:3306/stu</property>
<!--用户名-->
<property name="hibernate.connection.username">root</property>
<!--密码-->
<property name="hibernate.connection.password">123456</property>
<property name="hibernate.dialect">org.hibernate.dialect.MariaDB10Dialect</property>
<property name="hibernate.show_sql">true</property>
<mapping class="com.wbg.entity.Book"/>
</session-factory>
</hibernate-configuration>
测试成功
package com.wbg;
import com.wbg.entity.Book;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class test {
public static void main(String[] args) {
Configuration configuration=new Configuration();
Configuration configure=configuration.configure("hibernate.xml");
SessionFactory sessionFactory=configuration.buildSessionFactory();
Session session=sessionFactory.openSession();
Book book= session.get(Book.class,2L);
System.out.println(book.toString());
}
}