Admin: 1 версия

2010-06-01T05:02:43Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

Новая страница

== QBE Advanced Criteria ==

File: Main.java



<source lang="java">
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Example;
public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table Product(id int, name varchar, description varchar, price decimal(6,2), supplierid int)");

hibernateUtil
.executeSQLCommand("create table Supplier (id int , name varchar)");
hibernateUtil
.executeSQLCommand("create table Software(id int, name varchar, description varchar, price decimal(6,2), supplierid int, version varchar)");

Session session = hibernateUtil.getSession();
Supplier superCorp = new Supplier();
superCorp.setName("Supplier1");
session.save(superCorp);

Supplier megaInc = new Supplier();
megaInc.setName("Supplier2");
session.save(megaInc);
Product mouse = new Product("Product1","first product", 20.0);
mouse.setSupplier(superCorp);
superCorp.getProducts().add(mouse);
session.flush();
Product mouse2 = new Product("Product2","second product", 22.0);
mouse2.setSupplier(superCorp);
superCorp.getProducts().add(mouse2);

Product keyboard = new Product("Product3", "third product", 30.0);
keyboard.setSupplier(megaInc);
megaInc.getProducts().add(keyboard);
Software webBrowser = new Software("Web Browser","new browser", 75.0, "2.0");
webBrowser.setSupplier(superCorp);
superCorp.getProducts().add(webBrowser);
Software email = new Software("Email","email client", 49.99, "4.1 Edition");
email.setSupplier(megaInc);
megaInc.getProducts().add(email);
session.flush();

Criteria prdCrit = session.createCriteria(Product.class);
Product product = new Product();
product.setName("P%");
Example prdExample = Example.create(product);
prdExample.excludeProperty("price");
prdExample.enableLike();
Criteria suppCrit = prdCrit.createCriteria("supplier");
Supplier supplier = new Supplier();
supplier.setName("Supplier2");
suppCrit.add(Example.create(supplier));
prdCrit.add(prdExample);
List results = prdCrit.list();

System.out.println(results);

session.close();
hibernateUtil.checkData("select * from Product");
hibernateUtil.checkData("select * from Software");
hibernateUtil.checkData("select * from Supplier");
}
}</source>



== QBE Criteria: Not Null Or Zero ==

File: Main.java



<source lang="java">
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Example;
public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table Product(id int, name varchar, description varchar, price decimal(6,2), supplierid int)");

hibernateUtil
.executeSQLCommand("create table Supplier (id int , name varchar)");
hibernateUtil
.executeSQLCommand("create table Software(id int, name varchar, description varchar, price decimal(6,2), supplierid int, version varchar)");

Session session = hibernateUtil.getSession();
Supplier superCorp = new Supplier();
superCorp.setName("Supplier1");
session.save(superCorp);

Supplier megaInc = new Supplier();
megaInc.setName("Supplier2");
session.save(megaInc);
Product mouse = new Product("Product1","first product", 20.0);
mouse.setSupplier(superCorp);
superCorp.getProducts().add(mouse);
session.flush();
Product mouse2 = new Product("Product2","second product", 22.0);
mouse2.setSupplier(superCorp);
superCorp.getProducts().add(mouse2);

Product keyboard = new Product("Product3", "third product", 30.0);
keyboard.setSupplier(megaInc);
megaInc.getProducts().add(keyboard);
Software webBrowser = new Software("Web Browser","new browser", 75.0, "2.0");
webBrowser.setSupplier(superCorp);
superCorp.getProducts().add(webBrowser);
Software email = new Software("Email","email client", 49.99, "4.1 Edition");
email.setSupplier(megaInc);
megaInc.getProducts().add(email);
session.flush();

Criteria crit = session.createCriteria(Product.class);
Product exampleProduct = new Product();
exampleProduct.setName("Product3");
Example example = Example.create(exampleProduct);
example.excludeZeroes();
crit.add(example);
List results = crit.list();

System.out.println(results);

session.close();
hibernateUtil.checkData("select * from Product");
hibernateUtil.checkData("select * from Software");
hibernateUtil.checkData("select * from Supplier");
}
}</source>



== Query By Example ==

File: Main.java



<source lang="java">
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Example;
public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table survey (id int,name varchar, purchasedate date);");
Session session = hibernateUtil.getSession();
Survey survey = new Survey();
survey.setName("Survey");
survey.setPurchaseDate(new Date());
session.save(survey);

survey = new Survey();
survey.setName("Survey1");
survey.setPurchaseDate(new Date());
session.save(survey);

session.flush();

Criteria crit = session.createCriteria(Survey.class);
Survey supplier = new Survey();
supplier.setName("Survey");
crit.add(Example.create(supplier));
List results = crit.list();
Iterator iter = results.iterator();
while (iter.hasNext()) {
Survey cd = (Survey) iter.next();
System.out.println("Result Name:"+cd.getName());
}
session.close();
hibernateUtil.checkData("select * from survey");
}
}</source>

← Предыдущая	Версия 05:02, 1 июня 2010
(нет различий)

Java Tutorial/Hibernate/Query by Example - История изменений

Admin: 1 версия

в 17:44, 31 мая 2010