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.
Related
I am using "select max(pid) from Patient p" in hibernate using spring mvc framework and it is showing "Stacktrace:] with root cause
org.hibernate.hql.internal.ast.QuerySyntaxException: Patient is not mapped" and lots more error. Why???
<%
Configuration cfg = new Configuration();
cfg.configure("doc.cfg.xml");
SessionFactory sf = cfg.buildSessionFactory();
Session s = sf.openSession();
Query q = s.createQuery("select max(pid) from Patient p");
List lst = q.list();
%>
Actually I want the value
<%=lst %>
and want to get the max of pid from my POJO class Patient from the database patient having pid as integer values.
patient.java
package dao;
public class patient {
private String ppass , pname , mob , age , sex , addr;
private int pid;
public String getPpass() {
return ppass;
}
public void setPpass(String ppass) {
this.ppass = ppass;
}
public String getPname() {
return pname;
}
public void setPname(String pname) {
this.pname = pname;
}
public String getMob() {
return mob;
}
public void setMob(String mob) {
this.mob = mob;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddr() {
return addr;
}
public void setAddr(String addr) {
this.addr = addr;
}
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
}
and
doc.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="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name=
"connection.url">jdbc:mysql://localhost:3306/doctoapp</property>
<property name="connection.username">root</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hbm2ddl.auto">update</property>
<property name="show_sql">true</property>
<!-- student class ka mapping -->
<mapping resource="doc.hbm.xml"/>
<mapping resource="pat.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Here is my project structure:
I'm trying to save a Patient Entity to my database using hibernate:
PatientController.java
#RestController
public class PatientController {
#Autowired
PatientRepository patientRepository;
#GetMapping("/patients")
public List<Patient> getPatients(){
SessionFactory factory = new Configuration().configure("/com/nbu/projects/dentistappointmentsys/hibernate.cfg.xml")
.buildSessionFactory();
Session session = factory.openSession();
//Add new Patient object
Patient p1 = new Patient();
p1.setEmail("lokesh#mail.com");
p1.setFirstName("lokesh");
p1.setLastName("gupta");
p1.setPassword("gupta123");
//Save the patient in database
session.save(p1);
session.flush();
session.close();
return patientRepository.findAll();
}
Patient.java
#Entity
public class Patient {
#Id
#GeneratedValue
Long id;
String firstName;
String lastName;
String email;
String password;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Patient(){}
public Patient(String firstName, String lastName, String email, String password) {
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
this.password = password;
}
}
PatientRepository
public interface PatientRepository extends JpaRepository {
}
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.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/dentist-appointment-sys</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<property name="connection.autocommit">true</property>
<mapping class="com.nbu.projects.dentistappointmentsys.models.Patient"></mapping>
</session-factory>
</hibernate-configuration>
HibernateUtil
public class HibernateUtil
{
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory()
{
try {
return new Configuration().configure("/com/nbu/projects/dentistappointmentsys/hibernate.cfg.xml").buildSessionFactory();
} 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() {
// Close caches and connection pools
getSessionFactory().close();
}
}
In the fron end I have an http get like so:
public getPatients(): Observable<Patient[]> {
return this.httpClient.get('patients');
}
So far I was able to read my Patient data from my db, but now that I've tried to update the db I get the This Error
Can anybody tell me what I'm doing wrong, since I'm new to hibernate and I'm probably mistaking in my configuration etc..
Error says it all
Not able to locate hibernate.cfg.xml
so the problem is in this line
return new Configuration().configure("/com/nbu/projects/dentistappointmentsys/hibernate.cfg.xml").buildSessionFactory();
As far as I can see your HibernateUtils is in same place where hibernate.cfg.xml is
so just try
return new Configuration().configure("hibernate.cfg.xml").buildSessionFactory();
and it should work
getting file reference works relatively.
you have to start from source file where you are accessing your file and all way to target file
I fixed it by moving my hibernate.cgf.xml to src/main/resources. To anybody who is having the same issue - check if after you compile the hibernate config file shows up in target/classes, as it should if you've placed it under resources
You can paste your "hibernate.cfg.xml" file to the src\main\resources\hibernate.cfg.xml:
Then in the HibernateUtil file,please change as below:
return new Configuration().configure().buildSessionFactory().openSession();
Here is the exception i am facing, it occurs when i call session.save
object.org.hibernate.MappingException: Unknown entity:
com.java.learn.pojo.Employee
here is my java code
try
{
Configuration configuration = new Configuration().configure();
StandardServiceRegistryBuilder builder =
new StandardServiceRegistryBuilder().applySettings(configuration.getProperties());
SessionFactory factory = configuration.buildSessionFactory(builder.build());
Session session = factory.openSession();
Employee e = new Employee(1, "", "", 3);
e.setFirstName("sparsh");
session.save(e);
System.out.println("in dao");
}
catch (Throwable ex)
{
System.err.println("Failed to create sessionFactory object." + ex);
factory.close();
throw new ExceptionInInitializerError(ex);
}
and here is my hibrnate.cfg.xml
<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 students is the database name -->
<property name="hibernate.connection.url">
jdbc:mysql://localhost/test
</property>
<property name="hibernate.connection.username">
root
</property>
<property name="hibernate.connection.password">
root1
</property>
<property name="hbm2ddl.auto">create</property>
<property name="show_sql">true</property>
<mapping class="com.java.learn.pojo.Employee"/>
</session-factory>
</hibernate-configuration>
this exception occurs because of no mapping for Pojo class, but I have added it.
Pojo class
package com.java.learn.pojo;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Table
#Entity
public class Employee
{
#Id
#GeneratedValue
#Column(name = "id")
private int id;
#Column(name = "first_name")
private String firstName;
#Column(name = "last_name")
private String lastName;
#Column(name = "salary")
private int salary;
public Employee()
{
}
public Employee(int id, String firstName, String lastName, int salary)
{
super();
this.id = id;
this.firstName = firstName;
this.lastName = lastName;
this.salary = salary;
}
public int getId()
{
return id;
}
public void setId(int id)
{
this.id = id;
}
public String getFirstName()
{
return firstName;
}
public void setFirstName(String first_name)
{
this.firstName = first_name;
}
public String getLastName()
{
return lastName;
}
public void setLastName(String last_name)
{
this.lastName = last_name;
}
public int getSalary()
{
return salary;
}
public void setSalary(int salary)
{
this.salary = salary;
}
}
Please help
You can use new Configuration().configure() to load the Entity mappings from hbm.xml files.
But because you are using annotations for your Employee Entity class, you simply need to use AnnotationConfiguration instead of Configuration as shown below:
So, replace the line below:
Configuration configuration = new Configuration().configure();
with:
Configuration configuration = new AnnotationConfiguration().configure();
Problem:
The problem is obvious here, you have not correctly mapped your Employee entity which is so relevant from the error stack trace:
object.org.hibernate.MappingException: Unknown entity: com.java.learn.pojo.Employee
And the problem is that the mapped entity in your hibernate.cfg.xml configuration file can't be reached because you placed your file under web-inf/classes so when hibernate tries to look for your Entity it will look for it under web-inf/classes and it won't find it.
Solution:
To solve this problem you just need to place your hibernate.cfg.xml file under Java/src folder instead of web-inf/classes so the Entity can be reached.
I'm trying to learn Hibernate using MySQL built-in database named world. It has three tables called city, country and countrylanguage. What I'm trying to do is execute SQL statement SELECT * FROM world.city;. When I run my project I'm getting error
org.hibernate.hql.internal.ast.QuerySyntaxException: City is not mapped [from City]
I'm using IntelliJ IDEA and Hibernate 5.2.8.
I created mapping xml file like this:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="pl.hibernatePackage">
<class name="City" table="city">
<id name="id" column="ID" type="int">
<generator class="native"/>
</id>
<property name="name" column="Name" type="string"/>
<property name="countryCode" column="CountryCode" type="string"/>
<property name="district" column="District" type="string"/>
<property name="population" column="Population" type="int"/>
</class>
</hibernate-mapping>
City.java is presented below:
public class City
{
private Integer id;
private String name;
private String countryCode;
private String district;
private Integer population;
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 String getCountryCode() {
return countryCode;
}
public void setCountryCode(String countryCode) {
this.countryCode = countryCode;
}
public String getDistrict() {
return district;
}
public void setDistrict(String district) {
this.district = district;
}
public Integer getPopulation() {
return population;
}
public void setPopulation(Integer population) {
this.population = population;
}
}
I'm creating session in HibernateUtil.java
public class HibernateUtil
{
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure();
StandardServiceRegistryBuilder standardServiceRegistryBuilder = new StandardServiceRegistryBuilder();
standardServiceRegistryBuilder.applySettings(configuration.getProperties());
ServiceRegistry serviceRegistry = standardServiceRegistryBuilder.build();
return configuration.buildSessionFactory(serviceRegistry);
}
catch(Exception e) {
throw new ExceptionInInitializerError(e);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
Configuration file
<?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.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/world</property>
<property name="hibernate.connection.username">test</property>
<property name="hibernate.connection.password">1234</property>
<property name="connection.pool_size">1</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="current_session_context_class">thread</property>
<property name="show_sql">false</property>
<property name="hbm2ddl.auto">update</property>
<!-- List of XML mapping files -->
<mapping resource="pl/hibernatePackage/City.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Main
public class Main
{
public static void main(String[] args)
{
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
List<City> cities = session.createQuery("from City").list();
for(City c : cities) {
System.out.println(c.getId() + "\t" + c.getName() + "\t" + c.getCountryCode() + "\t" + c.getDistrict() +
"\t" + c.getPopulation());
}
session.getTransaction().commit();
HibernateUtil.getSessionFactory().close();
}
}
EDIT Full error list
EDIT 2
javac result
I have done some testing and i made it work by using the fully qualified class name:
session.createQuery("from pl.hibernatePackage.City")
Now this is only a workaround without touching your config..
After digging deeper i found out that since hibernate version 5.x, there is a different strategy for building the sessionFactory.
I made your example work by implementing sessionFactory as follows:
StandardServiceRegistry standardRegistry = new StandardServiceRegistryBuilder()
.configure()
.build();
Metadata metadata = new MetadataSources( standardRegistry )
.getMetadataBuilder()
.build();
return configuration.buildSessionFactory(serviceRegistry);
This is explained with example here: jboss documentation (point 2.4)
Thanks to Maciej's answer and help of other guys I managed to get my example to work by modifying code and cleaning it up a little. I also found out that mapping DB with xml file is outdated so I modifiied properly CityEntity class. Final code:
Main.java
import org.hibernate.Session;
import java.util.List;
public class Main
{
public static void main(String[] args)
{
Session session = HibernateUtil.getSession();
session.beginTransaction();
List<CityEntity> cities = session.createQuery("from CityEntity").list();
for(CityEntity c : cities)
{
System.out.println(c.getId() + "\t" + c.getName() + "\t" + c.getCountryCode() + "\t" + c.getDistrict() +
"\t" + c.getPopulation());
}
session.getTransaction().commit();
HibernateUtil.close();
}
}
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.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/world</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">1234</property>
<property name="connection.pool_size">1</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<!-- List of mapped classes -->
<mapping class="CityEntity"/>
</session-factory>
</hibernate-configuration>
HibernateUtil.java
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
public class HibernateUtil
{
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure();
StandardServiceRegistry standardRegistry = new StandardServiceRegistryBuilder()
.configure()
.build();
return configuration.buildSessionFactory(standardRegistry);
}
catch(Exception e) {
throw new ExceptionInInitializerError(e);
}
}
public static Session getSession()
{
return sessionFactory.openSession();
}
public static void close()
{
sessionFactory.close();
}
}
CityEntity.java
import javax.persistence.*;
#Entity
#Table(name = "city", schema = "world")
public class CityEntity
{
private int id;
private String name;
private String countryCode;
private String district;
private int population;
#Basic
#Column(name = "CountryCode")
public String getCountryCode() {
return countryCode;
}
public void setCountryCode(String countryCode) {
this.countryCode = countryCode;
}
#Id
#Column(name = "ID")
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Basic
#Column(name = "Name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#Basic
#Column(name = "District")
public String getDistrict() {
return district;
}
public void setDistrict(String district) {
this.district = district;
}
#Basic
#Column(name = "Population")
public int getPopulation() {
return population;
}
public void setPopulation(int population) {
this.population = population;
}
}
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)