Java Tutorial/Hibernate/Restrictions
Версия от 17:44, 31 мая 2010; (обсуждение)
Содержание
Logical Expression OR
File: Main.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.Criterion;
import org.hibernate.criterion.LogicalExpression;
import org.hibernate.criterion.Restrictions;
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);
Criterion price = Restrictions.gt("Id",new Integer(1));
Criterion name = Restrictions.like("name","S%");
LogicalExpression orExp = Restrictions.or(price,name);
crit.add(orExp);
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");
}
}
Restriction: EQ
File: Main.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.Restrictions;
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);
session.flush();
Criteria crit = session.createCriteria(Survey.class);
crit.add(Restrictions.eq("name","Survey"));
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");
}
}
Restriction: GT
File: Main.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.MatchMode;
import org.hibernate.criterion.Restrictions;
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);
crit.add(Restrictions.gt("Id",new Integer(0)));
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");
}
}
Restriction:ILIKE
File: Main.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.MatchMode;
import org.hibernate.criterion.Restrictions;
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);
crit.add(Restrictions.ilike("name","Sur", MatchMode.END));
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");
}
}
Restriction:IS NULL
File: Main.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.MatchMode;
import org.hibernate.criterion.Restrictions;
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.setPurchaseDate(new Date());
session.save(survey);
session.flush();
Criteria crit = session.createCriteria(Survey.class);
crit.add(Restrictions.isNull("name"));
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");
}
}
Restriction: LIKE
File: Main.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.Restrictions;
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);
crit.add(Restrictions.like("name","Survey%"));
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");
}
}
Restrictions.Disjunction
File: Main.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.Criterion;
import org.hibernate.criterion.Disjunction;
import org.hibernate.criterion.Restrictions;
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);
Criterion price = Restrictions.gt("Id",new Integer(0));
Criterion name = Restrictions.like("name","S%");
Disjunction disjunction = Restrictions.disjunction();
disjunction.add(price);
disjunction.add(name);
crit.add(disjunction);
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");
}
}