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)

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 +'}';
}
}

<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>

<?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>

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());}
}