Я удалил аннотированный класс из файла hibernate.cfg.xml.Я не использовал Spring.Но как-то это сработало Я не знаю, почему этот кусок кода не работает org.hibernate.MappingException: Неизвестная сущность: entity.Buyer эта ошибка повторяется, поэтому я прокомментировал код
SessionFactory factory;
StandardServiceRegistry ssr = new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties())
.configure("hibernate.cfg.xml")
.build();
Metadata meta = new MetadataSources(ssr).getMetadataBuilder().build();
factory = meta.getSessionFactoryBuilder().build();
Session session=factory.openSession();
Transaction t = session.beginTransaction();
session.persist(buyerreg);
t.commit();
session.close();
Это то, что я использовал вместо
hibernate.cfg.config
<?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.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/mkulimaonline</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.query.factory_class">org.hibernate.hql.internal.classic.ClassicQueryTranslatorFactory</property>
<property name="hibernate.connection.autocommit">true</property>
<property name="hibernate.hbm2ddl.auto">update</property>
</session-factory>
</hibernate-configuration>
Registration.java Я прокомментировал код, который не работал, и эта альтернатива как-то работала
import entity.Buyer;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.*;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
public class Register extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Buyer buyerreg = new Buyer();
String email = request.getParameter("email");
String password = request.getParameter("password");
String username = request.getParameter("username");
String fname = request.getParameter("fname");
String lname = request.getParameter("lname");
String phone = request.getParameter("phoneno");
int phoneno = Integer.parseInt(phone);
String location = request.getParameter("location");
buyerreg.setEmail(email);
buyerreg.setPassword(password);
buyerreg.setFname(fname);
buyerreg.setLname(lname);
buyerreg.setUsername(username);
buyerreg.setPhoneno(phoneno);
buyerreg.setLocation(location);
SessionFactory sessionFactory;
ServiceRegistry serviceRegistry;
Configuration configuration = new Configuration();
configuration.addAnnotatedClass(Buyer.class)
.addResource("entity/Buyer.hbm.xml")
.configure();
serviceRegistry = new ServiceRegistryBuilder()
.applySettings(configuration.getProperties())
.configure("hibernate.cfg.xml")
.build();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
Session session = sessionFactory.openSession();
session.beginTransaction();
session.persist(buyerreg);
session.getTransaction().commit();
session.close();
System.out.println("success");
response.sendRedirect("shop.jsp");
/*SessionFactory factory;
StandardServiceRegistry ssr = new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties())
.configure("hibernate.cfg.xml")
.build();
Metadata meta = new MetadataSources(ssr).getMetadataBuilder().build();
factory = meta.getSessionFactoryBuilder().build();
Session session=factory.openSession();
Transaction t = session.beginTransaction();
session.persist(buyerreg);
t.commit();
session.close();
*/
}
}
Buyer.java Мне пришлось использовать автоматически сгенерированный класс Java из базы данных ... У моего собственного создания была эта ошибка даже после использования@Entity annotation "org.hibernate.MappingException: Неизвестная сущность: entity.Buyer"
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package entity;
import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.xml.bind.annotation.XmlRootElement;
/**
*
* @author Tariana
*/
@Entity
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "Buyer.findAll", query = "SELECT b FROM Buyer b")
, @NamedQuery(name = "Buyer.findById", query = "SELECT b FROM Buyer b WHERE b.id = :id")
, @NamedQuery(name = "Buyer.findByUsername", query = "SELECT b FROM Buyer b WHERE b.username = :username")
, @NamedQuery(name = "Buyer.findByFname", query = "SELECT b FROM Buyer b WHERE b.fname = :fname")
, @NamedQuery(name = "Buyer.findByLname", query = "SELECT b FROM Buyer b WHERE b.lname = :lname")
, @NamedQuery(name = "Buyer.findByEmail", query = "SELECT b FROM Buyer b WHERE b.email = :email")
, @NamedQuery(name = "Buyer.findByPhoneno", query = "SELECT b FROM Buyer b WHERE b.phoneno = :phoneno")
, @NamedQuery(name = "Buyer.findByPassword", query = "SELECT b FROM Buyer b WHERE b.password = :password")
, @NamedQuery(name = "Buyer.findByLocation", query = "SELECT b FROM Buyer b WHERE b.location = :location")})
public class Buyer implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
private Integer id;
@Basic(optional = false)
private String username;
@Basic(optional = false)
private String fname;
@Basic(optional = false)
private String lname;
@Basic(optional = false)
private String email;
@Basic(optional = false)
private int phoneno;
@Basic(optional = false)
private String password;
@Basic(optional = false)
private String location;
public Buyer() {
}
public Buyer(Integer id) {
this.id = id;
}
public Buyer(Integer id, String username, String fname, String lname, String email, int phoneno, String password, String location) {
this.id = id;
this.username = username;
this.fname = fname;
this.lname = lname;
this.email = email;
this.phoneno = phoneno;
this.password = password;
this.location = location;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
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 getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public int getPhoneno() {
return phoneno;
}
public void setPhoneno(int phoneno) {
this.phoneno = phoneno;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Buyer)) {
return false;
}
Buyer other = (Buyer) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
@Override
public String toString() {
return "entity.Buyer[ id=" + id + " ]";
}
}
и Buyer.hbm.xml остались прежними
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="entity.Buyer" table="buyer">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="identity" />
</id>
<property name="username" type="string">
<column name="username" length="25" not-null="true" unique="true" />
</property>
<property name="fname" type="string">
<column name="fname" length="20" not-null="true" />
</property>
<property name="lname" type="string">
<column name="lname" length="20" not-null="true" />
</property>
<property name="email" type="string">
<column name="email" length="50" not-null="true" unique="true" />
</property>
<property name="phoneno" type="int">
<column name="phoneno" not-null="true" unique="true" />
</property>
<property name="password" type="string">
<column name="password" length="30" not-null="true" />
</property>
<property name="location" type="string">
<column name="location" length="16" not-null="true" />
</property>
</class>
</hibernate-mapping>