Hibernate——Demo1

最新推荐文章于 2019-08-04 14:59:27 发布

原创最新推荐文章于 2019-08-04 14:59:27 发布 · 251 阅读

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CC 4.0 BY-SA版权

本文介绍了一个使用Hibernate框架进行数据提交时遇到的问题：由于未将数据库表的ID字段设置为自增，导致数据提交失败。文章提供了完整的配置文件及示例代码。

hibernate.cfg.xml

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

<!DOCTYPE hibernate-configuration PUBLIC
	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
	
<hibernate-configuration>
	<session-factory>
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="hibernate.connection.url">jdbc:mysql:///hibernate_day01</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">123</property>
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
		<!-- 映射配置文件，需要引入映射的配置文件 -->
		<mapping resource="domain/User.hbm.xml"/>
	</session-factory>
</hibernate-configuration>

User.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">



<hibernate-mapping>
	<class name="domain.User" table="user">
		<id name="id" column="id">
			<generator class="native"/>
		</id>
		
		<property name="name" column="name"/>
		<property name="sex" column="sex"/>
		<property name="age" column="age"/>
		<property name="height" column="height"/>
		<property name="hobby" column="hobby"/>		
	</class>	
</hibernate-mapping>

User.java

package domain;

public class User {
	private String name;
	private String sex;
	private int age;
	private int height;
	private String hobby;
	private int id;
	
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public int getHeight() {
		return height;
	}
	public void setHeight(int height) {
		this.height = height;
	}
	public String getHobby() {
		return hobby;
	}
	public void setHobby(String hobby) {
		this.hobby = hobby;
	}
	@Override
	public String toString() {
		return "User [name=" + name + ", sex=" + sex + ", age=" + age + ", height=" + height + ", hobby=" + hobby + "]";
	}
		

}

Demo1.java

package homework;

import org.hibernate.Session;
import org.hibernate.Transaction;
import domain.User;
import utils.HibernateUtils;


public class Demo1 {
	public static void main(String[] args) {
		
		Session session = HibernateUtils.getSession();
		Transaction ts = session.beginTransaction();
		
		User user = new User();


		user.setName("宋长乾");
		user.setSex("男");
		user.setAge(21);
		user.setHeight(170);
		user.setHobby("写代码");
		
		session.save(user);
		ts.commit();
		
		session.close();
	}
}