I’m trying to use hibernate in eclipse IDE, I have reverse engineered POJO class successfully. But it shows an error in hibernate configuration under session factory.
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.password">1234</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/customer</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<mapping class="com.example.pojo.Customer"/>
<mapping resource="com/example/pojo/Customer.hbm.xml"/>
</session-factory>
</hibernate-configuration>
hibernate.reveng.xml
<?xml version="1.0" encoding="UTF-8"?>
<hibernate-reverse-engineering>
<table-filter match-catalog="customer" match-name="customer" />
<table catalog="customer" name="customer">
<column name="id"></column>
<column name="firstName"></column>
<column name="cuscol"></column>
<column name="lastName"></column>
<column name="birthDate"></column>
<column name="email"></column>
</table>
</hibernate-reverse-engineering>
Customer Pojo
public class Customer implements java.io.Serializable {
private int id;
private String firstName;
private String cuscol;
private String lastName;
private Date birthDate;
private String email;
public Customer() {
}
public Customer(int id) {
this.id = id;
}
public Customer(int id, String firstName, String cuscol, String lastName, Date birthDate, String email) {
this.id = id;
this.firstName = firstName;
this.cuscol = cuscol;
this.lastName = lastName;
this.birthDate = birthDate;
this.email = email;
}
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return this.firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getCuscol() {
return this.cuscol;
}
public void setCuscol(String cuscol) {
this.cuscol = cuscol;
}
public String getLastName() {
return this.lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Date getBirthDate() {
return this.birthDate;
}
public void setBirthDate(Date birthDate) {
this.birthDate = birthDate;
}
public String getEmail() {
return this.email;
}
public void setEmail(String email) {
this.email = email;
}
}
customer.hbm.xml
<?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">
<!-- Generated Jul 20, 2016 4:45:13 PM by Hibernate Tools 4.0.0 -->
<hibernate-mapping>
<class name="Customer" table="customer" catalog="customer">
<id name="id" type="int">
<column name="id" />
<generator class="assigned" />
</id>
<property name="firstName" type="string">
<column name="firstName" length="45" />
</property>
<property name="cuscol" type="string">
<column name="cuscol" length="45" />
</property>
<property name="lastName" type="string">
<column name="lastName" length="45" />
</property>
<property name="birthDate" type="date">
<column name="birthDate" length="10" />
</property>
<property name="email" type="string">
<column name="email" length="45" />
</property>
</class>
</hibernate-mapping>
Update mapping entry in customer.hbm.xml like this -
<class="com.example.pojo.Customer" table= "customer"/>
Related
when i want to save my object it throws unknown entity exception.
tnx in advance
Exception in thread "main" org.hibernate.MappingException: Unknown
entity: com.simpleProgrammer.User at
org.hibernate.metamodel.internal.MetamodelImpl.entityPersister(MetamodelImpl.java:618)
at
org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1595)
at
org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:104)
at
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)
at
org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
at
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)
at
org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
at
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:667)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:659) at
org.hibernate.internal.SessionImpl.save(SessionImpl.java:654) at
com.simpleProgrammer.Program.main(Program.java:22)
my hibernate.cfg.xml file is here
<?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">root</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/protein_tracker</property>
<property name="hibernate.connection.username">root</property>
<!-- <property name="hibernate.default_schema"></property> -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.hbm2ddl.auto">create</property>
<mapping resource="com/simpleProgrammer/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>
my User.hbm.xml mapping file
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping">
<hibernate-mapping>
<class name="com.simpleProgrammer.User" table="USERS">
<id name="id" type="int" column="id">
<generator class="identity" />
</id>
<property name="name" column="NAME" type="string" />
<component name="proteinData">
<property name="total" column="TOTAL" type="int" />
<property name="goal" column="GOAL" type="int" />
</component>
<set name="history" table="USER_HISTORY">
<key column="ID"/>
<composite-element class="com.simpleProgrammer.UserHistory">
<property name="entryTime" type="date" column="ENTRY_TIME"/>
<property name="entry" type="string" column="ENTRY"/>
</composite-element>
</set>
</class>
</hibernate-mapping>
my progaram.java
package com.simpleProgrammer;
import java.util.Date;
import org.hibernate.Session;
public class Program {
public static void main(String[] args) {
Session session = new HibernateUtilities().getSessionFactory().openSession();
System.out.println("Session Opened!!!");
session.beginTransaction();
System.out.println("Transaction begined!");
User user = new User();
user.setName("Joe");
user.getHistory().add(new UserHistory(new Date(), "Setting Name to Joe"));
user.getProteinData().setGoal(250);
user.getHistory().add(new UserHistory(new Date(), "Setting Goal to 250!"));
System.out.println("Setting user Object");
session.save(user);
System.out.println("Saving user object on table");
session.getTransaction().commit();
System.out.println("Transaction Commited!");
session.beginTransaction();
User loadedUser = session.get(User.class, 1);
System.out.println(loadedUser.getName());
System.out.println(loadedUser.getProteinData().getGoal());
System.out.println(loadedUser.getProteinData().getTotal());
loadedUser.getProteinData().setTotal(loadedUser.getProteinData().getTotal() + 50);
loadedUser.getHistory().add(new UserHistory(new Date(), "Added 50 Protein!"));
for (UserHistory history : loadedUser.getHistory()) {
System.out.println(history.getEntryTime().toString() + " " + history.getEntry());
}
session.getTransaction().commit();
session.close();
System.out.println("Session Closed!!!");
HibernateUtilities().getSessionFactory().close();
System.out.println("Session Factory Closed");
}
}
user class
package com.simpleProgrammer;
import java.util.HashSet;
import java.util.Set;
public class User {
private int id;
private String name;
private ProteinData proteinData = new ProteinData();
private Set<UserHistory> history = new HashSet<UserHistory>();
public Set<UserHistory> getHistory() {
return history;
}
public void setHistory(Set<UserHistory> history) {
this.history = history;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public ProteinData getProteinData() {
return proteinData;
}
public void setProteinData(ProteinData proteinData) {
this.proteinData = proteinData;
}
}
here is my project structure
I think you should check your other configure file."Unknown entity" means your application doesn't find something like User.hbm.xml in the path.
for testing purpose i wrote very small code,which repeatedly throws exception related to jdbc driver.
package sally;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class MainClass {
public static void main(String args[]){
try{
Session session=HibernateUtil.getSession();
Transaction tx=session.beginTransaction();
Employee ee=new Employee("abx","asd",2000);
session.save(ee);
tx.commit();
}catch(Exception e){
e.printStackTrace();
}
}
}
This is my ben/pojo class for mapping
package sally;
public class Employee {
private int id;
private String firstName;
private String lastName;
private int salary;
public Employee() {}
public Employee(String fname, String lname, int salary) {
this.firstName = fname;
this.lastName = lname;
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;
}
}
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="sally.Employee" table="EMPLOYEE">
<meta attribute="class-description">
This class contains the employee detail.
</meta>
<id name="id" type="int" column="id">
<generator class="native"/>
</id>
<property name="firstName" column="first_name" type="string"/>
<property name="lastName" column="last_name" type="string"/>
<property name="salary" column="salary" type="int"/>
</class>
</hibernate-mapping>
and this is cfg file for pojo class:
<?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/test</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<mapping class="sally.Employee"></mapping>
</session-factory>
but every time i am running the code it throws exxception :
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
org.hibernate.exception.JDBCConnectionException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:420)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
at sally.MainClass.main(MainClass.java:12)
Caused by: java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/test
at java.sql.DriverManager.getConnection(DriverManager.java:596)
at java.sql.DriverManager.getConnection(DriverManager.java:187)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:417)
... 5 more
can any body tell whats wrong here???
this is db column list : first_name last_name salary.
You need to put the mysql JDBC driver JAR on your classpath
name for the driver class must be updated as well as server time zone (for me this is insane but it has to be done
<?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.url">jdbc:mysql://127.0.0.1:3306/hibernate?serverTimezone=UTC</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
</session-factory>
</hibernate-configuration>
org.hibernate.exception.JDBCConnectionException: Cannot open connection It occurs when you have not started the xampp and MySql.
I have this table in mysql:
CREATE TABLE IF NOT EXISTS `realEstate`.`USER` (
`userID` INT NOT NULL AUTO_INCREMENT,
`username` VARCHAR(45) NULL,
`password` VARCHAR(45) NULL,
`registrationDate` VARCHAR(15) NULL,
`name` VARCHAR(45) NULL,
`surname` VARCHAR(45) NULL,
`phone` VARCHAR(45) NULL,
`email` VARCHAR(45) NULL,
`registered` TINYINT(1) NULL,
PRIMARY KEY (`userID`),
UNIQUE INDEX `user_id_UNIQUE` (`userID` ASC))
ENGINE = InnoDB;
and I try to get all its contents with hibernate. Althoug I implemented the .hbm file I get the error that the USER is not mapped[from USER]. Here how I make the question:
List<Users> users = null;
Session session = null;
Transaction transaction = null;
try {
SessionFactory factory = HibernateUtil.getSessionFactory();
session = factory.getCurrentSession();
transaction = session.beginTransaction();
Query query = session.createQuery("from USER");
users = query.list();
transaction.commit();
} catch (HibernateException ex) {
System.out.println("Exception:");
System.out.println(ex.getMessage());
if (transaction != null) {
transaction.rollback();
}
} finally {
/*for(Users user:users){
System.out.println(user.getName());
}*/
}
System.out.println("Complete");
and here is the users.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Users" table="USER">
<id name="userID" type="int">
<column name="userID" />
<generator class="assigned" />
</id>
<property name="username" type="java.lang.String">
<column name="username" length="45"/>
</property>
<property name="password" type="java.lang.String">
<column name="password" length="45" />
</property>
<property name="name" type="java.lang.String">
<column name="name" length="45"/>
</property>
<property name="date" type="java.lang.String">
<column name="registrationDate" length="45"/>
</property>
<property name="surname" type="java.lang.String">
<column name="surname" length="45"/>
</property>
<property name="phone" type="java.lang.String">
<column name="phone" length="45"/>
</property>
<property name="email" type="java.lang.String">
<column name="email" length="45"/>
</property>
<property name="registered" type="boolean">
<column name="registered" />
</property>
</class>
</hibernate-mapping>
Eveyrything seems fine to me, but it doesn't work. Can you help me?
Here's the class Users:
public class Users {
private int user_id;
private String username;
private String password;
private String date;
private String name;
private String surname;
private String phone;
private String email;
private boolean registered;
public int getuserID() {
return user_id;
}
public void setuserID(int user_id) {
this.user_id = user_id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public boolean getRegistered() {
return registered;
}
public void setRegistered(boolean registered) {
this.registered = registered;
}
}
here's the 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 name="session1">
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/realestate</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">300</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>
<mapping resource="users.hbm.xml"/>
<mapping resource="adminstrator.hbm.xml"/>
</session-factory>
</hibernate-configuration>
and here's the directory
In the HQL , you should use the java class name and property name of the mapped Entity instead of the actual table name and column name , so the HQL should be :
Query query = session.createQuery("from USERS");
as provided by you in users.hbm.xml
I am using Hibernate4 with Spring and I am trying to map a Term class to a Document class. A term may occur in many documents and a document can contain many terms. I have read up on this, and I have attempted a number of fixes, including overriding the equals and hashCode methods.
In my database the terms and documents are stored in separated tables mediated by a relationship table. In the code here, it is called the jtable. I am using hibernates many-to-many mapping, but every time that I try to fetch a term object it simply deletes the row in the relationship table.
Here is a sample sql output that hibernate's show sql is giving out:
Hibernate: SELECT * FROM tags WHERE token='rose'
Hibernate: delete from jtable where tag_id=?
Here are the relevant classes and configs:
public class Term {
public String getWord() {
return word;
}
public void setWord(String word) {
this.word = word;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Set<Document> getDocuments() {
return documents;
}
public void setDocuments(Set<Document> documents) {
documents = documents;
}
#Override
public boolean equals(Object obj) {
if(obj.getClass() != getClass()){
return false;
}
Term term = (Term) obj;
if (hashCode() == term.hashCode()){
return true;
}
return false;
}
#Override
public int hashCode(){
return word.hashCode();
}
private String word;
private int id;
private Set<Document> documents = new HashSet<Document>();
}
And the Document class :
public class Document implements Comparable<Document> {
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public URL getUrl() {
return url;
}
public void setUrl(URL url) {
this.url = url;
}
public Integer getLength() {
return length;
}
public void setLength(Integer length) {
this.length = length;
}
public Double getRank() {
return rank;
}
public void setRank(Double rank) {
this.rank = rank;
}
#Override
public boolean equals(Object obj) {
if(obj.getClass() != getClass()){
return false;
}
Document document = (Document) obj;
if (hashCode() == document.hashCode()){
return true;
}
return false;
}
#Override
public int hashCode(){
int hash = 1;
hash *= 1 + (length == null ? 0 :length);
hash *= 2 + (rank == null ? 0 :rank);
hash *= 3 + (title == null ? 0 : title.hashCode());
hash *= 4 + (url.hashCode());
return hash;
}
#Override
public int compareTo(Document document) {
return rank.compareTo(document.getRank());
}
private int id;
private Integer length;
private Double rank;
private String title;
private URL url;
}
Document.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="package.Document" table="documents">
<id name="id" type="java.lang.Integer">
<column name="document_id" />
<generator class="native" />
</id>
<property name="title" type="java.lang.String">
<column name="title" length="255" not-null="false" />
</property>
<property name="length">
<column name="length" not-null="false"/>
</property>
<property name="rank" type="java.lang.Double">
<column name="rank" not-null="false" />
</property>
<property name="url" type="org.hibernate.type.UrlType">
<column name="url" length="255" not-null="false" />
</property>
</class>
</hibernate-mapping>
Term.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="package.Term" table="tags">
<id name="id" type="java.lang.Integer">
<column name="tag_id" />
<generator class="native" />
</id>
<property name="word" type="string">
<column name="token" not-null="true" unique="true" />
</property>
<set name="documents" table="jtable"
inverse="false" lazy="true" fetch="select" cascade="all" >
<key>
<column name="tag_id" not-null="true" />
</key>
<many-to-many entity-name="package.Document">
<column name="document_id" not-null="true" />
</many-to-many>
</set>
</class>
</hibernate-mapping>
And the relevant context config section:
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${database.driver}"/>
<property name="url" value="${database.url}"/>
<property name="username" value="${database.user}"/>
<property name="password" value="${database.password}"/>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingResources">
<list>
<value>Document.hbm.xml</value>
<value>Term.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop key="format_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
</props>
</property>
</bean>
I have been looking at this error for a while, so any answers would be appreciated.
i am new in using hibernate and for some reason i am getting a list of null objects when i am using the following code:
public static void main(String args[])
{
Session s = HibernateUtil.currentSession();
ArrayList lst = (ArrayList) s.createQuery("from Users").list();
for(Object obj : lst){
Users user = (Users)obj;
System.Out.println(user.getUserid()); // null
}
}
my hibernate mapping xml looks like this:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 27, 2012 9:48:45 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="us.Users" table="USERS">
<id name="userid" type="int">
<column name="USERID" precision="9" scale="0" />
<generator class="assigned" />
</id>
<property name="username" type="string">
<column name="USERNAME" length="200" />
</property>
<property name="password" type="string">
<column name="PASSWORD" length="200" />
</property>
<property name="firstName" type="string">
<column name="FIRST_NAME" length="200" />
</property>
<property name="lastName" type="string">
<column name="LAST_NAME" length="200" />
</property>
<property name="dateOfBirth" type="timestamp"> // my guess was that the problem appears with the timestamp property
<column name="DATE_OF_BIRTH" />
</property>
<property name="registrationDate" type="timestamp">
<column name="REGISTRATION_DATE" />
</property>
<one-to-one name="administrators" class="assignment2.Administrators"></one-to-one>
<set name="histories" table="HISTORY" inverse="true" lazy="false" fetch="select">
<key>
<column name="USERID" precision="9" scale="0" not-null="true" />
</key>
<one-to-many class="us.History" />
</set>
<set name="loginlogs" table="LOGINLOG" inverse="true" lazy="false" fetch="select">
<key>
<column name="USERID" precision="9" scale="0" not-null="true" />
</key>
<one-to-many class="us.Loginlog" />
</set>
</class>
here is my 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.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.password">abcd</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:#localhost:1521:xe</property>
<property name="hibernate.connection.username">SYSTEM</property>
<property name="hibernate.default_schema">SYSTEM</property>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
<property name="hibernate.search.autoregister_listeners">false</property>
<mapping resource="assignment2/History.hbm.xml" />
<mapping resource="assignment2/Similarity.hbm.xml" />
<mapping resource="assignment2/Loginlog.hbm.xml" />
<mapping resource="assignment2/Users.hbm.xml" />
<mapping resource="assignment2/Administrators.hbm.xml" />
<mapping resource="assignment2/Mediaitems.hbm.xml" />
</session-factory>
and the users class:
/**
* Users generated by hbm2java
*/
public class Users implements java.io.Serializable {
private int userid;
private String username;
private String password;
private String firstName;
private String lastName;
private Date dateOfBirth;
private Date registrationDate;
private Administrators administrators;
private Set<History> histories = new HashSet<History>(0);
private Set<Loginlog> loginlogs = new HashSet<Loginlog>(0);
public Users() {
}
public Users(int userid) {
this.userid = userid;
}
public Users(int userid, String username, String password,
String firstName, String lastName, Serializable dateOfBirth,
Serializable registrationDate, Administrators administrators,
Set<History> histories, Set<Loginlog> loginlogs) {
this.userid = userid;
this.username = username;
this.password = password;
this.firstName = firstName;
this.lastName = lastName;
this.dateOfBirth = dateOfBirth;
this.registrationDate = registrationDate;
this.administrators = administrators;
this.histories = histories;
this.loginlogs = loginlogs;
}
public int getUserid() {
return this.userid;
}
public void setUserid(int userid) {
this.userid = userid;
}
public String getUsername() {
return this.username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return this.password;
}
public void setPassword(String password) {
this.password = password;
}
public String getFirstName() {
return this.firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return this.lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Date getDateOfBirth() {
return this.dateOfBirth;
}
public void setDateOfBirth(Date dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
public Date getRegistrationDate() {
return this.registrationDate;
}
public void setRegistrationDate(Date registrationDate) {
this.registrationDate = registrationDate;
}
public Administrators getAdministrators() {
return this.administrators;
}
public void setAdministrators(Administrators administrators) {
this.administrators = administrators;
}
public Set<History> getHistories() {
return this.histories;
}
public void setHistories(Set<History> histories) {
this.histories = histories;
}
public Set<Loginlog> getLoginlogs() {
return this.loginlogs;
}
public void setLoginlogs(Set<Loginlog> loginlogs) {
this.loginlogs = loginlogs;
}
}
thanks alot in advance