自己写一个hibernate的小demo

朱雀 2022-07-18 05:20 179阅读 0赞

1.准备pom如下：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    	<modelVersion>4.0.0</modelVersion>
    	<groupId>com</groupId>
    	<artifactId>hibernate_demo</artifactId>
    	<packaging>war</packaging>
    	<version>0.0.1-SNAPSHOT</version>
    	<name>hibernate_demo Maven Webapp</name>
    	<url>http://maven.apache.org</url>
    <properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    	<dependencies>
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    			<version>3.8.1</version>
    			<scope>test</scope>
    		</dependency>
    		<dependency>
    			<groupId>org.hibernate</groupId>
    			<artifactId>hibernate-core</artifactId>
    			<version>4.2.8.Final</version>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.slf4j</groupId>
    			<artifactId>slf4j-simple</artifactId>
    			<version>1.6.1</version>
    		</dependency>
    		<dependency>
    			<groupId>mysql</groupId>
    			<artifactId>mysql-connector-java</artifactId>
    			<version>5.1.6</version>
    		</dependency>
    	</dependencies>
    	<build>
    		<finalName>hibernate_demo</finalName>
    	</build>
    </project>

2.创建持久化类：

package hibernate_demo;
    
    public class UserModel {
    	private String uuid;
    	private int userId;
    	private String name;
    	private int age;
    
    	public String getUuid() {
    		return uuid;
    	}
    	public void setUuid(String uuid) {
    		this.uuid = uuid;
    	}
    	public int getUserId() {
    		return userId;
    	}
    	public void setUserId(int userId) {
    		this.userId = userId;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public int getAge() {
    		return age;
    	}
    	public void setAge(int age) {
    		this.age = age;
    	}
    	
    }

3.创建cfg.xml：

<?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>
            <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
            <property name="hibernate.connection.url">jdbc:mysql:///hibernate</property>
            <property name="hibernate.connection.username">root</property>
            <property name="hibernate.connection.password"></property>
            <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
            
            
            <property name="show_sql">true</property>
    
            
            <property name="hbm2ddl.auto">create</property>
            
            <mapping resource="hibernate_demo/UserModel.hbm.xml"/>
        </session-factory>
    </hibernate-configuration>

4.创建持久化类的映射文件hbm.xml：

<?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'>
    <hibernate-mapping>
    	<class name="hibernate_demo.UserModel" table="tbl_user">
    		<id name="userId">
    			<generator class="native" />
    		</id>
    		<property name="uuid"></property>
    		<property name="name"></property>
    		<property name="age"></property>
    	</class>
    </hibernate-mapping>

5.创建test类：

package hibernate_demo;
    
    import org.hibernate.Session;
    import org.hibernate.SessionFactory;
    import org.hibernate.Transaction;
    import org.hibernate.cfg.Configuration;
    import org.junit.After;
    import org.junit.Before;
    import org.junit.Test;
    
    public class testC {
    
    	private SessionFactory sessionFactory;
    	
    
    	@Before
    	public void bef()
    	{ 
    		sessionFactory = new Configuration().configure().buildSessionFactory();
    	}
    	
    	@After
    	public void aft()
    	{
    		if (sessionFactory != null) {
    			sessionFactory.close();
    		}
    	}
    	
    	@Test
    	public void testdemo() throws SecurityException, IllegalStateException
    			 {
    
    		UserModel um = new UserModel();
    		um.setUuid("1");
    		um.setName("name1");
    		um.setAge(1);
    		Session s = sessionFactory.openSession();
    		Transaction t = s.beginTransaction();
    		s.save(um);
    		t.commit();
    		
    	}
    }

最新的test方法：

package hibernate_demo;
    
    import org.hibernate.Session;
    import org.hibernate.SessionFactory;
    import org.hibernate.Transaction;
    import org.hibernate.cfg.Configuration;
    import org.hibernate.service.ServiceRegistry;
    import org.hibernate.service.ServiceRegistryBuilder;
    import org.junit.After;
    import org.junit.Before;
    import org.junit.Test;
    
    public class testC {
    
    	private SessionFactory sessionFactory;
    	private ServiceRegistry serviceRegistry;
        
    	@Before
    	public void bef()
    	{ 
    		Configuration configuration = new Configuration();  
    	    configuration.configure();  
    		serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();          
    	    sessionFactory = configuration.buildSessionFactory(serviceRegistry);  
    	}
    	
    	@After
    	public void aft()
    	{
    		if (sessionFactory != null) {
    			sessionFactory.close();
    		}
    	}
    	
    	@Test
    	public void testdemo() throws SecurityException, IllegalStateException
    			 {
    
    		UserModel um = new UserModel();
    		um.setUuid("2");
    		um.setName("name2");
    		um.setAge(23);
    		Session s = sessionFactory.openSession();
    		Transaction t = s.beginTransaction();
    		s.save(um);
    		t.commit();
    		
    	}
    }