I try to save\get some data to\from my DB but with no result.
Server log: Hibernate: select user0_.ID as ID1_0_, user0_.LOGIN as LOGIN2_0_, user0_.PASSWORD as PASSWORD3_0_ from USER user0_
OR
Hibernate: drop table USER if exists
Hibernate: create table USER (ID integer generated by default as identity (start with 1), LOGIN varchar(255), PASSWORD varchar(255), primary key (ID))
Hibernate: insert into USER (ID, LOGIN, PASSWORD) values (default, ?, ?)
I've no any idea what's the problem.
I'm using Jetty, in-memory DB
hibernate.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.archive.autodetection">class,hbm</property>
<property name="hibernate.dialect">org.hibernate.dialect.HSQLDialect</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.connection.driver_class">org.hsqldb.jdbcDriver</property>
<property name="hibernate.connection.username">SA</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.url">jdbc:hsqldb:mem:dvd</property>
<property name="hibernate.hbm2ddl.auto">create</property>
<mapping class="secure.entity.User"></mapping>
</session-factory>
</hibernate-configuration>
User
package secure.entity;
import javax.persistence.*;
import java.io.Serializable;
#Entity
#Table(name = "USER")
public class User implements Serializable {
#Id
#Column(name = "ID")
#GeneratedValue
private Integer id;
#Column(name = "LOGIN")
private String login;
#Column(name = "PASSWORD")
private String password;
public User() {
}
public long getId(){ return this.id; }
public void setId(int id){ this.id = id; }
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
HibernateUtil
package secure.config;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
public class HibernateUtil
{
private static SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory()
{
try
{
if (sessionFactory == null)
{
Configuration configuration = new Configuration().configure(HibernateUtil.class.getResource("/hibernate.cfg.xml"));
StandardServiceRegistryBuilder serviceRegistryBuilder = new StandardServiceRegistryBuilder();
serviceRegistryBuilder.applySettings(configuration.getProperties());
ServiceRegistry serviceRegistry = serviceRegistryBuilder.build();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
}
return sessionFactory;
} catch (Throwable ex)
{
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory()
{
return sessionFactory;
}
public static void shutdown()
{
getSessionFactory().close();
}
}
UserService
package secure.service;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.springframework.stereotype.Service;
import secure.config.HibernateUtil;
import secure.entity.User;
import java.util.List;
#Service
public class UserServiceImpl implements UserService {
#Override
public User getByLogin(String login) {
User usr = new User();
Session session = HibernateUtil.getSessionFactory().openSession();
Transaction transaction = null;
try {
transaction = session.beginTransaction();
//String hql = "from User where login = :login";
Query query = session.createQuery("FROM User");//.setParameter("login", login);
List usrList = query.list();
transaction.commit();
} catch (HibernateException e) {
transaction.rollback();
e.printStackTrace();
} finally {
session.close();
}
return usr;
}
}
Related
Hey i am new to hibernate and java and im getting this exception i tried multiple solutions i found on google and nothing seems to work. Would appreciate any help. I am trying to return number of rows from table in database.
I am using mapping in xml file and im using addAnnotatedClass yet it is still throwing exception.
Here is my code:
Main.java
package springfoxdemo.java.swagger;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
public class Main {
private static SessionFactory sessionFactory;
private static ServiceRegistry serviceRegistry;
public static void main(String args[]) {
Session session = null;
try
{
try
{
Configuration cfg= new Configuration().addAnnotatedClass(Polica.class);
cfg.configure();
serviceRegistry = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).buildServiceRegistry();
sessionFactory = cfg.buildSessionFactory(serviceRegistry);
}
catch(Throwable th)
{
System.err.println("Failed to create sessionFactory object."
+ th);
throw new ExceptionInInitializerError(th);
}
session = sessionFactory.openSession();
Query query = session.createQuery("select count(p) from Polica p");
Iterator count = query.iterate();
System.out.println("No. of rows : "+ count.next());
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
finally
{
session.close();
}
}
}
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.cj.jdbc.Driver</property>
<property name="hibernate.connection.password">PASS</property>
<property name="hibernate.connection.url">DBCONNECTION</property>
<property name="hibernate.connection.username">USERNAME</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<mapping class="springfoxdemo.java.swagger.Polica"/>
</session-factory>
</hibernate-configuration>
Polica.java
package springfoxdemo.java.swagger;
import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.Id;
import jakarta.persistence.Table;
#Entity
public class Polica {
#Id
#GeneratedValue
#Column(name="id")
private int id;
#Column(name="ime_pol")
private String ime_pol;
public Polica() {
super();
}
public Polica(int id, String ime_pol) {
this.id = id;
this.ime_pol = ime_pol;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getIme_pol() {
return ime_pol;
}
public void setIme_pol(String ime_pol) {
this.ime_pol = ime_pol;
}
}
Exception:
Polica is not mapped [select count(p) from Polica p]
I'm trying to create a small project with hibernate, but i got that error "Type is not mapped [select o from Type o]", I added mapping in hibernate.cfg.xml but still error.
Type.java:
package com.formation.gestionprojet.doa.entity;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="Type")
public class Type implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
private Long id;
private String name;
private String description;
private String active;
public Type() {
super();
// TODO Auto-generated constructor stub
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getActive() {
return active;
}
public void setActive(String active) {
this.active = active;
}
}
hibernate.org.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>
<!-- database connection setting -->
<property name ="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/gestion_projet?createDatabaseIfNotExist=true</property>
<property name="connection.username">root</property>
<property name= "connection.password">root</property>
<!-- Dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Disable the second level cache -->
<property name="cache.provider_class" >org.hibernate.cache.NoCacheProvider</property>
<!-- echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drope and re-create the database -->
<property name="hbm2ddl.auto">update</property>
<!-- mapping -->
<mapping class= "com.formation.gestionprojet.doa.entity.Type"/>
</session-factory>
</hibernate-configuration>
hibernateUtil.java:
package com.formation.gestionprojet.utils;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
#SuppressWarnings("deprecation")
public class HibernateUtil
{
private static SessionFactory sessionFactory;
private static ServiceRegistry serviceRegistry;
static
{
try
{
Configuration configuration = new Configuration();
configuration.configure("config/hibernate.cfg.xml");
serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
}
catch (HibernateException ex)
{
System.err.println("Error creating Session: " + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory()
{
return sessionFactory;
}
public static Session openSession()
{
return sessionFactory.openSession();
}
public static Session getCurrentSession()
{
return sessionFactory.getCurrentSession();
}
public static void close(){
if(sessionFactory!=null){
sessionFactory.close();
}
}
}
Test.Java
package com.formation.gestionprojet.utils;
import org.hibernate.Session;
public class Test {
static Session session = HibernateUtil.openSession();
public static void main(String[] args) {
session.createQuery("select o from Type o").list();
}
}
First things first, Type is part of the JPA/Hibernate API. So consider renaming it, e.g. MyType or something similar.
Secondly, select is not mandatory in HQL. So you can simply et everything with only FROM clause.
Thirdly, try using fully qualified name of the class in the query.
"FROM com.formation.gestionprojet.doa.entity.MyType"
I get this error while trying to make test query for my Database. I refer to the java class instead of table name but it doesn't help. Added mapping to cfg.xml too but without success. What can be the cause?
hibernate.cfg.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="hibernate.connection.url">
jdbc:mysql://localhost:3306/michal
</property>
<property name="hibernate.connection.username">
root
</property>
<property name="hibernate.connection.password">
root
</property>
<property name="hibernate.hbm2ddl.auto">
</property>
<!-- List of XML mapping files -->
<mapping package="regularmikey.DatabaseSingleton"/>
<mapping class="regularmikey.DatabaseSingleton.Product" />
</session-factory>
</hibernate-configuration>
Product.java
package regularmikey.DatabaseSingleton;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "product")
public class Product {
#Column(name = "id")
#Id #GeneratedValue
private String id;
#Column(name = "name")
private String name;
#Column(name = "alloy")
private String alloy;
#Column(name = "weight")
private String weight;
#Column(name = "min_temp")
private String min_temp;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAlloy() {
return alloy;
}
public void setAlloy(String alloy) {
this.alloy = alloy;
}
public String getWeight() {
return weight;
}
public void setWeight(String weight) {
this.weight = weight;
}
public String getMin_temp() {
return min_temp;
}
public void setMin_temp(String min_temp) {
this.min_temp = min_temp;
}
}
DBSession.java
package regularmikey.DatabaseSingleton;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
public class DBSession {
private static DBSession dbSession = null;
private SessionFactory sessionFactory = null;
private DBSession(){
Configuration configuration = new Configuration().configure();
ServiceRegistry serviceRegistry
= new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties()).build();
sessionFactory = (configuration.buildSessionFactory(serviceRegistry));
};
public static DBSession getInstance()
{
if(dbSession == null) {
dbSession = new DBSession();
}
return dbSession;
}
public SessionFactory getSessionFactory() {
return sessionFactory;
}
}
App.java
package regularmikey.DatabaseSingleton;
import java.util.Iterator;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class App
{
public static void main( String[] args )
{
DBSession dbFactory = DBSession.getInstance();
Session session = dbFactory.getSessionFactory().openSession();
Transaction tx = null;
try{
tx = session.beginTransaction();
List products = session.createQuery("FROM Product").list();
for (Iterator iterator =
products.iterator(); iterator.hasNext();){
Product product = (Product) iterator.next();
System.out.print("Name: " + product.getName());
System.out.print("Alloy: " + product.getAlloy());
System.out.println("Weight: " + product.getWeight());
}
tx.commit();
}catch (HibernateException e) {
if (tx!=null) tx.rollback();
e.printStackTrace();
}finally {
session.close();
}
}
}
I am new at Hibernate Annotations and I'd like to try an example.
I have two classes (Node and HyperEdge), when I run my application, it only creates a table for Node and not for HyperEdge.
This is the code I developed:
Node :
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="Node")
public class Node {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
#Column
private String name;
#Column(name="\"group\"")
private Integer group;
public Node() {
super();
// TODO Auto-generated constructor stub
}
public Node(Integer id, String name, Integer group) {
super();
this.id = id;
this.name = name;
this.group = group;
}
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 getGroup() {
return group;
}
public void setGroup(Integer group) {
this.group = group;
}
}
HyperEdge :
import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Table(name="HyperEdge")
public class HyperEdge {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
#Column
private String title;
public HyperEdge() {
super();
// TODO Auto-generated constructor stub
}
public HyperEdge(Integer id, String title) {
super();
this.id = id;
this.title = title;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
hibernate.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>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/exhiber</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<property name="connection.pool_size">1</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="current_session_context_class">thread</property>
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">create</property>
<mapping class="com.hib.ex.entity.Node" />
<mapping class="com.hib.ex.entity.HyperEdge" />
</session-factory>
</hibernate-configuration>
HibernateDao :
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import com.hib.ex.entity.HyperEdge;
import com.hib.ex.entity.Node;
public class HibExDao {
public void saveNode(Node noeud) {
SessionFactory sf = HibExUtil.getSessionFactory();
Session session = sf.openSession();
session.beginTransaction();
session.save(noeud);
session.getTransaction().commit();
session.close();
}
public List listNode() {
SessionFactory sf = HibExUtil.getSessionFactory();
Session session = sf.openSession();
List nodes = session.createQuery("FROM Node").list();
session.close();
return nodes;
}
public Node readNode(Integer id) {
SessionFactory sf = HibExUtil.getSessionFactory();
Session session = sf.openSession();
Node noeud = (Node) session.get(Node.class, id);
session.close();
return noeud;
}
public void saveHyperEdge(HyperEdge he, String chaine) {
SessionFactory sf = HibExUtil.getSessionFactory();
Session session = sf.openSession();
session.beginTransaction();
he.setTitle(chaine);
session.save(he);
session.getTransaction().commit();
session.close();
}
public List listHyperEdge() {
SessionFactory sf = HibExUtil.getSessionFactory();
Session session = sf.openSession();
List hyperedges = session.createQuery("FROM HyperEdge").list();
session.close();
return hyperedges;
}
public HyperEdge readHyperEdge(Integer id) {
SessionFactory sf = HibExUtil.getSessionFactory();
Session session = sf.openSession();
HyperEdge hyperEdge = (HyperEdge) session.get(HyperEdge.class, id);
session.close();
return hyperEdge;
}
}
The main class :
import java.util.List;
import com.hib.ex.dao.HibExDao;
import com.hib.ex.entity.HyperEdge;
import com.hib.ex.entity.Node;
public class Run {
public static void main(String[] args) {
HibExDao dao = new HibExDao();
System.out.println("****************WRITING****************");
Node n1 = new Node();
n1.setName("toto");
dao.saveNode(n1);
System.out.println("Node saved!");
Node n2 = new Node();
n2.setName("lala");
dao.saveNode(n2);
System.out.println("Node saved!");
System.out.println("\n****************READING****************");
List nodes = dao.listNode();
System.out.println("Name in Node number 2 is: " + dao.readNode(2).getName());
}
}
What is the problem? And how can I fix it?
Thanks!
Perhaps you have to add #Entity annotation to your HyperEdge class
#Entity annotation to missing from your HyperEdge class
The #Entity annotation is used to mark this class as an Entity bean. So the class should atleast have a package scope no-argument constructor.
The #Table annotation is used to specify the table to persist the data. The name attribute refers to the table name. If #Table annotation is not specified then Hibernate will by default use the class name as the table name.
In HyperEdge class you have to add #Entity annotation so that hibernate can treat it as a entity to map with table HyperEdge in database.
#Entity
#Table(name="HyperEdge")
public class HyperEdge {
I used NanedQueries (as follows) in my JPA project Eclipselink as persistence provider:
#Entity
#Table(name = "login")
#NamedQueries({
#NamedQuery(name = "Login.random", query = "SELECT l FROM Login l WHERE l.pk = :randomPk"),
#NamedQuery(name = "Login.max", query = "SELECT MAX(l.pk) FROM Login l")
})
But after I change Hibernate as my persistence provider, I get the following error:
java.lang.IllegalArgumentException: org.hibernate.QueryException: unexpected char: '{' [SELECT...
I use Hibernate 3.2.5 (MySQL dialect)
Not having your exact configuration makes this difficult. But I didn't have an issue with hibernate 3.2.5.GA
I created the following Login Domain object:
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import java.io.Serializable;
#Entity
#Table(name = "login")
#NamedQueries({
#NamedQuery(name = "Login.random", query = "select l FROM Login l WHERE l.pk = :randomPk"),
#NamedQuery(name = "Login.max", query = "select max(l.pk) from Login l")
})
public class Login implements Serializable {
private Long pk;
private String username;
public Login() {}
public Login(Long pk, String username) {
this.pk = pk;
this.username = username;
}
#Id
public Long getPk() {
return pk;
}
public void setPk(Long pk) {
this.pk = pk;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
and test class:
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import sky.sns.domain.Login;
import static org.junit.Assert.assertEquals;
public class AnnotationTest {
private static SessionFactory sessionFactory;
private Session session;
private Transaction transaction;
#BeforeClass
public static void initialise() {
sessionFactory = new AnnotationConfiguration().configure("/hibernate-annotation.cfg.xml").buildSessionFactory();
}
#Before
public void setUp() {
session = sessionFactory.getCurrentSession();
transaction = session.beginTransaction();
}
#After
public void tearDown() {
transaction.rollback();
}
#Test
public void createUser() {
Login login = new Login(1L, "foo");
session.save(login);
session.flush();
session.clear();
Login persistedLogin = (Login)session.get(Login.class, 1L);
assertEquals(login.getPk(), persistedLogin.getPk());
}
#Test
public void obtainUserByIdNamedQuery() {
Login login = new Login(1L, "foo");
session.save(login);
session.flush();
session.clear();
Login persistedLogin = (Login)session.getNamedQuery("Login.random").setLong("randomPk", 1L).uniqueResult();
assertEquals(login.getPk(), persistedLogin.getPk());
}
#Test
public void obtainMaxUserIdNamedQuery() {
Login login = new Login(1L, "foo");
session.save(login);
session.flush();
session.clear();
Long maxId = (Long)session.getNamedQuery("Login.max").uniqueResult();
assertEquals(login.getPk(), maxId);
}
}
My hibernate-annotation.hbm.xml file is as follows:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.jboss.org/dtd/hibernate/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate_owner</property>
<property name="hibernate.connection.username">hibernate_owner</property>
<property name="hibernate.connection.password">hibernate</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable second-level cache. -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<property name="hibernate.format_sql">false</property>
<property name="hibernate.use_sql_comments">false</property>
<mapping class="sky.sns.domain.Login" />
</session-factory>
</hibernate-configuration>
Can you try this in your environment and let me know how you get on