My controller class is -
package com.javatechie.crud.example.controller;
import java.io.IOException;
import java.sql.SQLException;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestBody;
import com.javatechie.crud.example.entity.Product;
import com.javatechie.crud.example.service.ProductService;
public class ProductListController {
#Autowired
private ProductService service;
#GetMapping("/GetProduct")
public List<Product> addProducts(#RequestBody Product products) throws IOException, ClassNotFoundException, SQLException {
System.out.println("Inside addProducts controller method");
return service.saveProducts(1);
}
}
My entity class is -
package com.javatechie.crud.example.entity;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="PRODUCT_TBL")
public class Product {
#Id
#GeneratedValue
private int id;
private String name;
private String quantity;
private double price;
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 String getQuantity() {
return quantity;
}
public void setQuantity(String quantity) {
this.quantity = quantity;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
}
JpaRepository implementation is -
package com.javatechie.crud.example.entity;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="PRODUCT_TBL")
public class Product {
#Id
#GeneratedValue
private int id;
private String name;
private String quantity;
private double price;
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 String getQuantity() {
return quantity;
}
public void setQuantity(String quantity) {
this.quantity = quantity;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
}
And the service class is -
package com.javatechie.crud.example.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.javatechie.crud.example.entity.Product;
import com.javatechie.crud.example.repository.ProductRepository;
#Service
public class ProductService {
#Autowired
private ProductRepository repository;
public List<Product> saveProducts(int id) {
return repository.GetRepo(id);
}
}
And , the unexpected output which it is giving is -
Database table is as follows -
The output which I was expecting is the json body with sql record having id , name ,price,quantity . How can I achieve this output with native query only ? Please help.
You should add #RestController and #RequestMapping annotations for processing incoming REST requests.
#RestController
#RequestMapping("/api")
public class ProductListController {
#Autowired
private ProductService service;
#GetMapping("/GetProduct")
public List<Product> addProducts(#RequestBody Product products) throws IOException, ClassNotFoundException, SQLException {
System.out.println("Inside addProducts controller method");
return service.saveProducts(1);
}
}
Related
I tried to add One To Many Annotation to my spring boot project, but when I run my project I get "Failed to execute CommandLineRunner " error.
I wanted users in the user's table to have more than one city. So, I tried to add OneToMany Annotation.
You can see the error at the attachment.
User Class
package io.javabrains.springsecurity.jpa.models;
import com.spring.weather.*;
import java.util.*;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.OneToMany;
import javax.persistence.Table;
#Entity
#Table(name="app_user")
public class User {
#Id
#GeneratedValue(strategy =GenerationType.AUTO)
private int id;
private String userName;
private String password;
private boolean active;
private String role;
private String city;
#OneToMany(targetEntity = UserCity.class,cascade = CascadeType.ALL)
#JoinTable(name="USER_CITY",joinColumns=#JoinColumn(name="m_user_id"),
inverseJoinColumns=#JoinColumn(name="cityId"))
private List<UserCity> usercity;
public User() {
super();
// TODO Auto-generated constructor stub
}
public List<UserCity> getUsercity() {
return usercity;
}
public void setUsercity(List<UserCity> usercity) {
this.usercity = usercity;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = 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 boolean isActive() {
return active;
}
public void setActive(boolean active) {
this.active = active;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
}
User City Class
package io.javabrains.springsecurity.jpa.models;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
#Entity
#Table(name="user_city")
public class UserCity {
#Id
#GeneratedValue(strategy =GenerationType.AUTO)
private int cityId;
private String cityName;
public UserCity() {
super();
// TODO Auto-generated constructor stub
}
public UserCity(int cityId, String cityName, User mUser) {
super();
this.cityId = cityId;
this.cityName = cityName;
this.mUser = mUser;
}
#ManyToOne
private User mUser;
public int getCityId() {
return cityId;
}
public void setCityId(int cityId) {
this.cityId = cityId;
}
public String getCityName() {
return cityName;
}
public void setCityName(String cityName) {
this.cityName = cityName;
}
public User getmUser() {
return mUser;
}
public void setmUser(User mUser) {
this.mUser = mUser;
}
}
User Repository
package io.javabrains.springsecurity.jpa;
import java.util.Optional;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import io.javabrains.springsecurity.jpa.models.User;
public interface UserRepository extends JpaRepository<User, Integer> {
Optional<User> findByUserName(String userName);
}
User City Repository
package io.javabrains.springsecurity.jpa;
import org.springframework.data.jpa.repository.JpaRepository;
import io.javabrains.springsecurity.jpa.models.User;
import io.javabrains.springsecurity.jpa.models.UserCity;
public interface CityRepository extends JpaRepository<UserCity,id>{
}
Spring Application Class
package io.javabrains.springsecurity.jpa;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import com.spring.weather.WeatherService;
import io.javabrains.springsecurity.jpa.models.User;
import io.javabrains.springsecurity.jpa.models.UserCity;
#SpringBootApplication
#EnableJpaRepositories(basePackageClasses = UserRepository.class)
public class SpringsecurityApplication implements CommandLineRunner{
#Bean
public WeatherService ws() {
return new WeatherService ();
}
#Autowired
UserRepository userRepository;
CityRepository cityRepository;
public static void main(String[] args) {
SpringApplication.run(SpringsecurityApplication.class, args);
}
#Override
public void run(String... args) throws Exception {
// TODO Auto-generated method stub
System.out.println("Application Running.");
User adminUser= new User();
UserCity ucity=new UserCity();
UserCity ucity2=new UserCity();
ucity.setCityName("amsterdam");
adminUser.setUserName("Admin");
adminUser.setPassword(new BCryptPasswordEncoder().encode("pass"));
adminUser.setRole("ROLE_ADMIN");
adminUser.setActive(true);
adminUser.setCity("bologna");
ucity.setmUser(adminUser);
userRepository.save(adminUser);
cityRepository.save(ucity);
User newUser= new User();
newUser.setUserName("User");
newUser.setPassword(new BCryptPasswordEncoder().encode("pass"));
newUser.setRole("ROLE_USER");
newUser.setActive(true);
newUser.setCity("maribor");
ucity2.setmUser(newUser);
userRepository.save(newUser);
cityRepository.save(ucity2);
}
}
The problem you are encountering, more specifically the NullPointerException at line 54 of your main application, is caused by the fact that the cityRepository is not
instantiated.
Looking through your configuration, I see that you only register the UserRepository with the #EnableJpaRepositories annotation.
Try adding also the CityRepository to the #EnableJpaRepositories, and also specify this bean as a candidate for autowiring( also add #Autowired to this bean, as you did for UserRepository)
For a good practice, following the MVC structure, it would be nice is all your spring repositories, the beans responsible for all CRUD operations with the database to be under the same package
I want retrieve user email from MySql database table using spring boot.i used findByEmailAndPassword in controller but it retrieve null value for email.
Here is my Code
controller
package com.example.demo.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import com.example.demo.JPARepository;
import com.example.demo.pojo.regisbean;
#Controller
public class registerController {
regisbean pp;
#RequestMapping(value = "/")
public String mm() {
System.out.println("I am in m1 method");
return "index";
}
#RequestMapping(value = { "/register", "home" })
public String m1() {
System.out.println("I am in mm method");
return "register";
}
#Autowired
JPARepository jpaRepository;
#PostMapping("/register")
public String regis(#ModelAttribute regisbean rb)
{
System.out.println("I m in regis method");
regisbean b=jpaRepository.save(rb);
if(b!=null)
return "index";
else
return "fail";
}
#RequestMapping(value= {"/login1","login2"})
public String m2() {
System.out.println("i m in m2()");
return "login";
}
#PostMapping("/login")
public String login(#ModelAttribute regisbean rx,Model m) {
System.out.println("I am in Login");
regisbean re=jpaRepository.findByEmailAndPassword(rx.getEmail(), rx.getPassword());
if(re!=null)
{
m.addAttribute("email",rx.getEmail());
m.addAttribute("password",rx.getPassword());
System.out.println("yes");
return "loginsuccess";
}
else
{
System.out.println(rx.getEmail());
System.out.println("failed");
return "register";
}
}
}
pojo class
package com.example.demo.pojo;
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 = "pro")
public class regisbean {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
#Column
private String name;
#Column
private String email;
#Column
private String phonenumber;
#Column
private String password;
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 String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhonenumber() {
return phonenumber;
}
public void setPhonenumber(String phonenumber) {
this.phonenumber = phonenumber;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
Repository
package com.example.demo;
import org.springframework.data.repository.CrudRepository;
import com.example.demo.pojo.regisbean;
public interface JPARepository extends CrudRepository<regisbean, Integer> {
public regisbean findByEmailAndPassword(String email,String password);
}
I was able to get your code to work by inserting a row in the table:
INSERT INTO pro (
id
,email
,name
,password
,phonenumber
)
VALUES (
0
,'user#domain.com'
,'Jim'
,'secret'
,'123-123-1234'
)
Then changing:
public String login(#ModelAttribute regisbean rx,Model m) {
to:
public String login(#RequestBody RegisBean rx,Model m) {
and POSTing the following request body to the /login resource:
{
"email": "user#domain.com",
"password": "secret"
}
I didn't have to make any changes to your Repo. I suspect your attempt was failing because RegisBean was never being initialized with any values and so the repo was asked to find a record with a null email and a null password.
I was trying to build CRM for university.But when I tried to auto built table within the hibernate,it displays me the following error:
Not managed type interface io.javabrains.repository.DepartmentRepository
I just tried to add Repository annotation to every other Repo classes but no results were achieved
Department Category.class
package io.javabrains.Entities;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import lombok.Data;
import lombok.EqualsAndHashCode;
#Data
#EqualsAndHashCode(exclude="Student")
#Entity
#Table(name="department")
public class DepartmentCategory {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
public int getId() {
return id;
}
public DepartmentCategory(int id, String name, Set<Student> students) {
super();
this.id = id;
this.name = name;
this.students = students;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<Student> getStudents() {
return students;
}
public void setStudents(Set<Student> students) {
this.students = students;
}
private String name;
#OneToMany(mappedBy = "departmentCategory",cascade = CascadeType.ALL)
private Set<Student>students;
}
DepartmentRepository.class
package io.javabrains.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface DepartmentRepository extends JpaRepository<DepartmentRepository, Integer> {
}
CrmSchoolApplicaton.class
package io.javabrains;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
#SpringBootApplication
public class CrmSchoolApplication {
public static void main(String[] args) {
SpringApplication.run(CrmSchoolApplication.class, args);
}
}
...............
try to change your JpaRepository :
public interface DepartmentRepository extends JpaRepository<Department, Integer>
instead of
public interface DepartmentRepository extends JpaRepository<DepartmentRepository, Integer>
Started learning Spring Boot, JPA. Finding difficult on understanding JPA relationship concepts, I tried joining two tables but could not achieve the expected result can anyone help me to get the expected result.
Below Requirement
Have two tables as below
product_master table
product_catagory table
ProductMasterModel
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "product_master")
public class ProductMasterModel {
#Id
#GeneratedValue
#Column(name = "product_id")
private int productId;
#Column(name = "product_name")
private String productName;
#Column(name = "product_category_id")
private int productCategoryId;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "product_category_id", referencedColumnName = "product_catogory_id",insertable = false, updatable = false)
private ProductCatagoryMasterModel productCatagoryMasterModel;
public int getProductId() {
return productId;
}
public void setProductId(int productId) {
this.productId = productId;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public int getProductCategoryId() {
return productCategoryId;
}
public void setProductCategoryId(int productCategoryId) {
this.productCategoryId = productCategoryId;
}
public ProductMasterModel() {
super();
}
public ProductMasterModel(String productName, int productCategoryId) {
super();
this.productName = productName;
this.productCategoryId = productCategoryId;
}
}
ProductCatagoryMasterModel
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table (name="product_catagory")
public class ProductCatagoryMasterModel {
#Id
#GeneratedValue
#Column(name="product_catogory_id")
private int productCategoryId;
#Column(name="product_type")
private String productType;
#OneToOne(mappedBy = "productCatagoryMasterModel")
private ProductMasterModel productMasterModel;
public int getProductCategoryId() {
return productCategoryId;
}
public void setProductCategoryId(int productCategoryId) {
this.productCategoryId = productCategoryId;
}
public String getProductType() {
return productType;
}
public void setProductType(String productType) {
this.productType = productType;
}
public ProductCatagoryMasterModel() {
super();
}
public ProductCatagoryMasterModel(String productType) {
super();
this.productType = productType;
}
}
ProductMasterRepository
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.lollipop.model.ProductMasterModel;
#Repository
public interface ProductMasterRepository extends CrudRepository<ProductMasterModel, Integer> {
#Query (value = "select * from product_master pm, product_catagory pc where pc.product_catogory_id = pm.product_category_id", nativeQuery = true)
public List $ProductMasterModel$ getProductCategoryDetail();
}
ProductService
import java.util.List;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.lollipop.model.ProductMasterModel;
import com.lollipop.repository.ProductMasterRepository;
#Service
#Transactional
public class ProductService {
#Autowired
private ProductMasterRepository productMasterRepository;
public void getProductCat() {
List $ProductMasterModel$ productMasterModel = productMasterRepository.getProductCategoryDetail();
System.out.println("productMasterModel value "+productMasterModel.toString());
}
}
When calling getProductCat() method getting result as
productMasterModel value [ProductMasterModel [productId=1011,
productName=Pencil, productCategoryId=10], ProductMasterModel
[productId=1012, productName= Mobile, productCategoryId=11]]
Since ProductMasterModel is not having productType variable it is not displaying productType
I need below result by joining two tables, please help me to acheive this
[[productName=Pencil,productType=Stationary],[productName=
Mobile,productType=Electronics]]
Yes, One to One Relationship should work.
Changes should be made in your POJO.
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "product_master")
public class ProductMasterModel {
#Id
#GeneratedValue
#Column(name = "product_id")
private int productId;
#Column(name = "product_name")
private String productName;
#Column(name = "product_category_id")
private int productCategoryId;
#OneToOne(mappedBy= product_master, fetch = FetchType.LAZY)
public ProductCatagoryMasterModel productCatagory;
public int getProductId() {
return productId;
}
public void setProductId(int productId) {
this.productId = productId;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public int getProductCategoryId() {
return productCategoryId;
}
public void setProductCategoryId(int productCategoryId) {
this.productCategoryId = productCategoryId;
}
public ProductMasterModel() {
}
public ProductMasterModel(String productName, int productCategoryId) {
super();
this.productName = productName;
this.productCategoryId = productCategoryId;
}
}
Next Address your Category Model
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table (name="product_catagory")
public class ProductCatagoryMasterModel {
#Id
#GeneratedValue
#Column(name="product_catogory_id")
private int productCategoryId;
#Column(name="product_type")
private String productType;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "product_master", referencedColumnName = "product_id")
private ProductMasterModel productMaster;
public int getProductCategoryId() {
return productCategoryId;
}
public void setProductCategoryId(int productCategoryId) {
this.productCategoryId = productCategoryId;
}
public String getProductType() {
return productType;
}
public void setProductType(String productType) {
this.productType = productType;
}
public ProductCatagoryMasterModel() {
super();
}
public ProductCatagoryMasterModel(String productType) {
super();
this.productType = productType;
}
}
We also need DAO
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.lollipop.model.ProductMasterModel;
#Repository
public interface ProductMasterRepository extends CrudRepository<ProductMasterModel, Integer> {
}
Product Service
import java.util.List;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.lollipop.model.ProductMasterModel;
import com.lollipop.repository.ProductMasterRepository;
#Service
#Transactional
public class ProductService {
#Autowired
private ProductMasterRepository productMasterRepository;
public List<ProductMasterModel > getAllProducts() {
return productMasterRepository.findAll();
}
public Optional<ProductMasterModel > getProductById(int productId) {
if (!productMasterRepository.existsById(productId)) {
throw new ResourceNotFoundException("Product with id " + productId+ " not found");
}
return productMasterRepository.findById(productId);
}
}
}
You need to establish ont-to-one relationship between those two tables.
Take a look at this:
Example
I am new to Hibernate and I am trying to understand the oneToMany concept. I have created two entities which are Person and Book. A person can borrow many books and a book can only have one person borrowing it. So I have made the following classes
Person.java
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import org.hibernate.annotations.GenericGenerator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
#Entity
#Table(name="PERSON")
public class Person {
private static final Logger _logger = LoggerFactory.getLogger(Person.class);
#Id
#GenericGenerator(name="adder", strategy="increment")
#GeneratedValue(generator="adder")
#Column(name="PID")
private Long id;
#Column(name="FIRSTNAME")
private String firstName;
#Column(name="LASTNAME")
private String lastName;
#Column(name="BIRTHDATE")
#Temporal(TemporalType.DATE)
private Date birthDate;
//add genre and books
#OneToMany(orphanRemoval=true, mappedBy="person", cascade=CascadeType.ALL,targetEntity=Book.class)
private Set<Book> listOfBooks = new HashSet<Book>();
public Set<Book> getListOfBooks() {
return listOfBooks;
}
public void setListOfBooks(Set<Book> listOfBooks) {
this.listOfBooks = listOfBooks;
}
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 Date getBirthDate() {
return birthDate;
}
public void setBirthDate(Date birthDate) {
this.birthDate = birthDate;
}
//add constructor with all the details
}
Book.java
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import org.hibernate.annotations.GenericGenerator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
#Entity
#Table(name="BOOK")
public class Book {
private static final Logger logger = LoggerFactory.getLogger(Book.class);
#Id
#GenericGenerator(name="adder", strategy="increment")
#GeneratedValue(generator="adder")
private Long bookId;
#Column(name="NAME")
private String name;
#Column(name="AUTHOR")
private String author;
#Column(name="PUBLICATION_YEAR")
private int yearOfPublication;
#Column(name="PUBLISHER")
private String publisher;
#ManyToOne()
#JoinColumn(name="PERSON_ID")
private Person person;
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}
public Long getBookId() {
return bookId;
}
public void setBookId(Long bookId) {
this.bookId = bookId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public int getYearOfPublication() {
return yearOfPublication;
}
public void setYearOfPublication(int yearOfPublication) {
this.yearOfPublication = yearOfPublication;
}
public String getPublisher() {
return publisher;
}
public void setPublisher(String publisher) {
this.publisher = publisher;
}
}
HibernateLibraryDaoMain.java
import java.util.Date;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import se325.project.assignment1.hibernate.domain.Book;
import se325.project.assignment1.hibernate.domain.Person;
public class HibernateLibraryDaoMain {
public static void main(String[] args) {
Person person = new Person();
person.setFirstName("Bob");
person.setLastName("Marley");
person.setBirthDate(new Date());
Book book = new Book();
book.setName("Bob Marley book");
book.setAuthor("Lily Marley");
book.setPublisher("Marley Publications");
book.setYearOfPublication(2000);
Book book1 = new Book();
book1.setName("Laura Marley book");
book1.setAuthor("Laura Marley");
book1.setPublisher("Laura Publications");
book1.setYearOfPublication(2005);
person.getListOfBooks().add(book);
person.getListOfBooks().add(book1);
book.setPerson(person);
book1.setPerson(person);
Configuration configuration = new Configuration();
configuration.configure("se325/project/assignment1/hibernate/hibernate.cfg.xml");
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties()).build();
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
Session session = sessionFactory.openSession();
session.beginTransaction();
session.save(person);
session.save(book);
session.save(book1);
session.getTransaction().commit();
session.close();
}
}
The problem is that Hibernate does not create a separate Table that illustrates the oneToMany relationship. I can't seem to find the problem. Any help would be appreciated.
I understand where I went wrong. When I have a mappedBy property set, then Hibernate doesn't create a third table but instead it adds to the Entity that has the ManyToOne and joinColumn property. Thanks to all the users that helped :)