We Keep Coding

Hibernate can't find my hibernate.cfg.xml file

Pretty stupid/simple question. Doing an assignment and hibernate can't find my hibernate.cfg.xml file. I'm using IntelliJ and it is located inside my src folder. See my code below.
Main:
public class Main {
public static void main(String[] args) {
Employee tempEmployee = new Employee("Ronald", "Customer Service", true);
EmployeeDAO employeeDAO = new EmployeeDAO();
employeeDAO.saveEmployee(tempEmployee);
}
}
DAO:
public class EmployeeDAO {
SessionFactory sessionFactory = new Configuration()
.configure()
.addAnnotatedClass(Employee.class)
.buildSessionFactory();
public void saveEmployee(Employee employee){
Session session = sessionFactory.getCurrentSession();
try {
session.beginTransaction();
session.save(employee);
session.getTransaction().commit();
} finally {
session.close();
}
}
}
Entity:
#Entity
#Table(name = "employee")
public class Employee {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private long id;
#Column(name = "name")
private String name;
#Column(name = "department")
private String department;
#Column(name = "working")
private boolean working;
public Employee(){}
public Employee(String name, String department, boolean working) {
this.name = name;
this.department = department;
this.working = working;
}
#Override
public String toString() {
return "Employee{" +
"id=" + id +
", name='" + name + '\'' +
", department='" + department + '\'' +
", working=" + working +
'}';
}
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 getDepartment() {
return department;
}
public void setDepartment(String department) {
this.department = department;
}
public boolean isWorking() {
return working;
}
public void setWorking(boolean working) {
this.working = working;
}
}
Hibernate config:
<?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="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/employee</property>
<property name="connection.username">employee</property>
<property name="connection.password">employee</property>
<property name="dialect">com.hibernate.dialect.MySQL5Dialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">create</property>
<property name="current_session_context_class">thread</property>
</session-factory>
</hibernate-configuration>

add configuration.configure("classpath:com/resources/hibernate.cfg.xml"); this will locate your hibernate cfg.xml file also
read this tutorial

Mark your resources folder as resources from INTELLIJ IDEA.
Go to: File->Project Structure to do it.
Hope, it helps.

Put your XML configuration file hibernate.cfg.xml under src/main/resources.
Also you can add it manually using File → Project Structure → Add → Hibernate:
And then add a descriptor in the same window as:
specify the path to your descriptor and press OK.

Enity is not mapped - hibernate

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"

Hibernate SQLGrammarException: could not prepare statement

I have simple project with one class and a corresponding table in the database (MySQL). It works fine if put the hbm2ddl.auto set create in the hibernate configuration file. But, if I take it out. The code throws the following exception:
ERROR: Table "STUDENT" not found; SQL statement:
into student (fname, lname, entrance) values (?, ?, ?) [42102-185]
org.hibernate.exception.SQLGrammarException: could not prepare statement
I have already created the table in database but I don't know why hibernate cannot find the table. I am not sure how the connection to the database works.
<?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>
<!-- Assume test is the database name -->
<property name="hibernate.CONNECTION.url">
jdbc:mysql://localhost:3306/sample;MVCC=TRUE;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false;SCHEMA=sample
</property>
<property name="hibernate.connection.username"> root </property>
<property name="hibernate.connection.password"> **** </property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- -->
<property name="hbm2ddl.auto">create</property>
<!-- List of XML mapping files -->
<!-- -->
<mapping resource="Student.hbm.xml" />
<!-- <mapping class="ourPackage.Student" /> -->
</session-factory>
</hibernate-configuration>
Student Class:
#Entity
#Table(name="student")
public class Student implements Serializable{
public Student(){
}
public Student(int id, String fName, String lName, String ent){
this.id = id;
this.fname = fName;
this.lname = lName;
this.entrance = ent;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFname() {
return fname;
}
public void setFname(String fname) {
this.fname = fname;
}
public String getLname() {
return lname;
}
public void setLname(String lname) {
this.lname = lname;
}
public String getEntrance() {
return entrance;
}
public void setEntrance(String entrance) {
this.entrance = entrance;
}
#Id
#GeneratedValue
private int id;
private String fname;
private String lname;
private String entrance;
}
Student hibernate config
<hibernate-mapping>
<class name="ourPackage.Student" table="student">
<meta attribute="class-description">
This class contains the employee detail.
</meta>
<id name="id" type="int" column="id">
<generator class="native"/>
</id>
<property name="fname" column="fname" type="string"/>
<property name="lname" column="lname" type="string"/>
<property name="entrance" column="entrance" type="string"/>
</class>
</hibernate-mapping>
Main class
public class StudentDB {
private static SessionFactory factory;
private static ServiceRegistry serviceRegistry;
#SuppressWarnings("deprecation")
public static void main(String[] args) {
try {
// factory = new Configuration().configure().buildSessionFactory();
createSessionFactory();
} catch (Throwable ex) {
System.err.println("Failed to create sessionFactory object." + ex);
throw new ExceptionInInitializerError(ex);
}
StudentDB ME = new StudentDB();
Integer empID1 = ME.addStudent("Alex", "Jason", "2005");
ME.listStudent();
factory.close();
}
public void listStudent() {
Session session = factory.openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
Query temp = session.createQuery("from Student");
List students = temp.list();
for (Iterator iterator = students.iterator(); iterator.hasNext();) {
Student student = (Student) iterator.next();
System.out.print("First Name: " + student.getFname());
System.out.print(" Last Name: " + student.getLname());
System.out.println(" entrance: " + student.getEntrance());
}
tx.commit();
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
public static SessionFactory createSessionFactory() {
Configuration configuration = new Configuration();
configuration.configure();
serviceRegistry = new ServiceRegistryBuilder().applySettings(
configuration.getProperties()).buildServiceRegistry();
factory = configuration.buildSessionFactory(serviceRegistry);
return factory;
}
}

NullPointerException on Hibernate new Configuration();

This is my first time trying out Hibernate with Eclipse and the following are the things I did:
Created a Java Bean called Student.java which is as follows:
package com.jwt.hibernate;
public class Student {
private long id;
private String name;
private String degree;
private String roll;
private String phone;
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 getDegree() {
return degree;
}
public void setDegree(String degree) {
this.degree = degree;
}
public String getRoll() {
return roll;
}
public void setRoll(String roll) {
this.roll = roll;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
}
Created a mapping file, Student.hbm.xml as follows:
<hibernate-mapping>
<class name="com.jwt.hibernate.Student" table="student">
<id column="ID" name="id" type="long" />
<property column="name" name="name" type="string" />
<property column="degree" name="degree" type="string" />
<property column="roll" name="roll" type="string" />
<property column="phone" name="phone" type="string" />
</class>
</hibernate-mapping>
3. Created the hibernate configuration file, hibernate.cfg.xml as follows:
<?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.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernatetutorial</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="hbm2ddl.auto">create </property>
<mapping resource="com/jwt/hibernate/Student.hbm.xml" />
</session-factory>
</hibernate-configuration>
Created the class SimpleTest.java which is as follows:
package com.jwt.hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class SimpleTest {
public static void main(String[] args) {
Configuration cfg = new Configuration();
cfg.configure("hibernate.cfg.xml");
SessionFactory factory = cfg.buildSessionFactory();
Session session = factory.openSession();
Student student = new Student();
student.setName("Mukesh");
student.setRoll("101");
student.setPhone("8888");
student.setDegree("B.E");
Transaction tx = session.beginTransaction();
session.save(student);
System.out.println("Object saved successfully.....!!");
tx.commit();
session.close();
factory.close();
}
}
Now, when I try to run SimpleTest, I get the following error:
**INFO: HHH000412: Hibernate Core {4.3.7.Final}
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:326)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:291)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:295)
at com.jwt.hibernate.SimpleTest.main(SimpleTest.java:11)
Caused by: java.lang.NullPointerException
at org.hibernate.internal.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:221)
... 4 more**
I double checked and made sure that all the configuration and jar files were added to the classpath. So that is not the problem. I would really appreciate some insights as to what may have caused this problem and inturn, how to solve it.
Thanks in advance!

I would recommend updating to later version of SLF4J.
Or
Your Hibernate.cfg.xml is not on classpath. What folder is it in?
Edit :
Caused by: java.lang.NullPointerException
at org.hibernate.internal.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
This is actual exception in your code, If your Hibernate.cfg.xml is loaded then check for SELF4J version, Don't use user library to take your jar files, put all libraries in your lib folder and then configure those in class path.

You may find a Java Configuration of Hibernate to be more friendly. Here is an example of one that I did (Note: there are Spring annotations like #Autowired and #PostConstruct in this class so don't get confused):
public class HibernateConfigBean {
private static final Logger logger = Logger.getLogger(HibernateConfigBean.class);
#Autowired private Environment environment;
private SessionFactory sessionFactory;
private Configuration configuration;
#PostConstruct
private void init(){
configuration = new Configuration();
configuration.setProperty("hibernate.dialect", environment.getProperty("hibernate.dialect"));
configuration.setProperty("hibernate.connection.driver_class", environment.getProperty("hibernate.connection.driver_class"));
configuration.setProperty("hibernate.connection.url", environment.getProperty("hibernate.connection.url"));
configuration.setProperty("hibernate.connection.username", environment.getProperty("db_username"));
configuration.setProperty("hibernate.connection.password", environment.getProperty("db_password"));
//Add additional Annotated Classes here
configuration.addAnnotatedClass(UserEntity.class);
StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties());
sessionFactory = configuration.buildSessionFactory(builder.build());
}
public SessionFactory getSessionFactory(){
return sessionFactory;
}
//This should be visible outside of the package as it's only used by the GenerateDbSchema class
void generateSchema() throws Exception {
try{
new SchemaExport(configuration).create(false, true);
} catch (RuntimeException re){
throw new Exception(re);
}
}
}
Then I just put my values into a properties file :-)

inner join between two tables Hibernate

I need to do Inner join between two tables, but without success, I have to find all the patients related to a particular User,I tried to query without success.
I am using mysql and hibernate 3.6.4.
This is my code
Patient.java
#Entity
public class Patient {
#Id
private int id;
private String paitentFirstName;
private String paitentLastName;
private Date dateOfbirth;
private String sex;
#ManyToMany(cascade = {CascadeType.ALL})
#JoinTable(name="User_Patient",
joinColumns={#JoinColumn(name="id")},
inverseJoinColumns={#JoinColumn(name="userName")})
private Set<User> users = new HashSet<User>();
public Set<User> getUsers() {
return users;
}
public void setMeetings(Set<User> users) {
this.users = users;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getPaitentFirstName() {
return paitentFirstName;
}
public void setPaitentFirstName(String paitentFirstName) {
this.paitentFirstName = paitentFirstName;
}
public String getPaitentLastName() {
return paitentLastName;
}
public void setPaitentLastName(String paitentLastName) {
this.paitentLastName = paitentLastName;
}
public Date getDateOfbirth() {
return dateOfbirth;
}
public void setDateOfbirth(Date dateOfbirth) {
this.dateOfbirth = dateOfbirth;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
#Override
public String toString() {
return "Patient [id=" + id + ", paitentFirstName=" + paitentFirstName
+ ", paitentLastName=" + paitentLastName + ", dateOfbirth="
+ dateOfbirth + ", sex=" + sex + "]";
}
}
User.java
#Entity
public class User {
#Id
private String UserName;
#ManyToMany(mappedBy="users")
private Set<Patient> patients = new HashSet<Patient>();
public String getUserName() {
return UserName;
}
public void setUserName(String userName) {
UserName = userName;
}
public Set<Patient> getEmployees() {
return patients;
}
public void setEmployees(Set<Patient> patients) {
this.patients = patients;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
private String password;
}
Hibernate configuration file
<?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>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/test2</property>
<property name="connection.username">root</property>
<property name="connection.password">1234</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL 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>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">update</property>
<!-- Names the annotated entity class -->
<mapping class="com.objects.Patient"/>
<mapping class="com.objects.User"/>
</session-factory>
</hibernate-configuration>

There is no need for explicit join.
With Hibernate version that do have HHH-5209 fixed, query can be written as follows:
SELECT p
FROM Patient p
WHERE :particularUser MEMBER OF p.users
With older versions IN ELEMENTS can be used instead:
SELECT p
FROM Patient p
WHERE :particularUser IN ELEMENTS (p.users)