The first job orm environment build (hibernate) and basic demo

1. Database

       1. Create database hibernate01-1514010311

　　2. Create the table customer

CREATE TABLE customer(
	id int(11) not null auto_increment  PRIMARY KEY,
  name VARCHAR(20) DEFAULT NULL COMMENT '姓名',
	age int(11) DEFAULT NULL COMMENT 'age',
	sex VARCHAR(2) DEFAULT null COMMENT 'sex',
	city ​​VARCHAR(20) DEFAULT NULL COMMENT 'city'
);

2. Create a project and import the jar package

　　1. Use eclipse to create a web project and import the jar package required by hibernate

       

 

             2. Create an entity class

package domain;

public class Customer {
	private Integer id;
	private String name;
	private Integer age;
	private String sex;
	private String city;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	@Override
	public String toString() {
		return "Customer [id=" + id + ", name=" + name + ", age=" + age + ", sex=" + sex + ", city=" + city + "]";
	}
	
}

　　3. Write the mapping file

 　　Create Customer.hbm.xml under the domain package

<?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.Customer" table="customer">
		<id name="id" column="id">
			<generator class="native"></generator>
		</id>
		<property name="name" column="name" type="string"></property>
		<property name="age" column="age" type="integer"></property>
		<property name="sex" column="sex" type="string"></property>
		<property name="city" column="city" type="string"></property>
	</class>
</hibernate-mapping>

　　4. Write the core configuration file hibernate.cfg.xml

　　　Create hibernate.cfg.xml in the src directory

<?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>
			<!-- Specify dialect-->
			<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
			 <!-- database driver-->
			<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		 	<!-- database url -->
			<property name="hibernate.connection.url">jdbc:mysql:///hibernate01-1514010311</property>
			 <!-- database connection username-->
			<property name="hibernate.connection.username">root</property>
			 <!-- database connection password-->
			<property name="hibernate.connection.password">0x3137</property>
			<!-- Print the sql statement generated by hibernate to the console -->
			<property name="hibernate.show_sql">true</property>
			<!-- Format the sql statement generated by hibernate (syntax indentation) -->
			<property name="hibernate.format_sql">true</property>
			<mapping resource="domain/Customer.hbm.xml" />
		</session-factory>
		
		
	</hibernate-configuration>

　　5. Write test classes

 　　Import the JUnit4 runtime environment (details of Baidu JUnit unit testing, niche)

　　　Select the project and click the right mouse button -> select Build Path-> select Configure Build Path-> select as shown, select Add Library-> select JUnit->next->finish->apply

　　Create the CustomerTest class under the test package

package test;

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

import domain.Customer;

public class CustomerTest {
	@Test
	public void insertTest() {
		//1. Load the core configuration file
		Configuration config = new Configuration().configure();
		//2. Get SessionFactory
		SessionFactory sessionFactory = config.buildSessionFactory();
		//3. Get a session
		Session session = sessionFactory.openSession();
		//4. Open the transaction
		Transaction transaction = session.beginTransaction();
		//5. Operation
		Customer customer = new Customer();
		customer.setName("The third brother is innocent");
		customer.setAge(21);
		customer.setSex("男");
		customer.setCity("Harbin");
		//5.2 Store the data in the table
		session.save(customer);
		//6. Commit transaction
		transaction.commit();
		//7. Close the resource
		session.close();
		sessionFactory.close();
	}
}

　　Select the method name under @Test->Right click->Run As->JUnit Test

　　Test add method insertTest()

 

 

In this regard, a simple hibernate demo has been written.