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Hibernate one to many Tutorial (#1050)

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* First Commit

* Second Commit for Guide to JGit

* Hibernate many to one example

* added test units to hibernate one to many tutorial
This commit is contained in:
Mobi Blunt 2017-01-28 09:16:00 +01:00 committed by maibin
parent a722a46373
commit d472a7dfa0
12 changed files with 592 additions and 2 deletions
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1
.gitignore vendored
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@ -27,3 +27,4 @@ target/
spring-openid/src/main/resources/application.properties
.recommenders/
/spring-hibernate4/nbproject/

4
spring-hibernate4/pom.xml
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@ -105,7 +105,7 @@
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<version>4.12</version>
<scope>test</scope>
</dependency>
@ -119,7 +119,7 @@
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
<version>${org.hamcrest.version}</version>
<version>1.3</version>
<scope>test</scope>
</dependency>

38
spring-hibernate4/src/main/java/com/baeldung/hibernate/oneToMany/config/HibernateAnnotationUtil.java Normal file
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package com.baeldung.hibernate.oneToMany.config;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
public class HibernateAnnotationUtil {
private static SessionFactory sessionFactory;
private static SessionFactory buildSessionFactory() {
try {
// Create the SessionFactory from hibernate-annotation.cfg.xml
Configuration configuration = new Configuration();
configuration.configure("hibernate-annotation.cfg.xml");
System.out.println("Hibernate Annotation Configuration loaded");
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
System.out.println("Hibernate Annotation serviceRegistry created");
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
}
catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
ex.printStackTrace();
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
if(sessionFactory == null) sessionFactory = buildSessionFactory();
return sessionFactory;
}
}

60
spring-hibernate4/src/main/java/com/baeldung/hibernate/oneToMany/main/HibernateOneToManyAnnotationMain.java Normal file
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package com.baeldung.hibernate.oneToMany.main;
import java.util.HashSet;
import java.util.Set;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import com.baeldung.hibernate.model.Cart;
import com.baeldung.hibernate.model.Items;
import com.baeldung.hibernate.config.HibernateAnnotationUtil;
public class HibernateOneToManyAnnotationMain {
public static void main(String[] args) {
Cart cart = new Cart();
cart.setName("MyCart");
Items item1 = new Items("I10", 10, 1, cart);
Items item2 = new Items("I20", 20, 2, cart);
Set<Items> itemsSet = new HashSet<Items>();
itemsSet.add(item1); itemsSet.add(item2);
cart.setItems(itemsSet);
cart.setTotal(10*1 + 20*2);
SessionFactory sessionFactory = null;
Session session = null;
Transaction tx = null;
try{
//Get Session
sessionFactory = HibernateAnnotationUtil.getSessionFactory();
session = sessionFactory.getCurrentSession();
System.out.println("Session created");
//start transaction
tx = session.beginTransaction();
//Save the Model object
session.save(cart);
session.save(item1);
session.save(item2);
//Commit transaction
tx.commit();
System.out.println("Cart ID="+cart.getId());
System.out.println("item1 ID="+item1.getId()+", Foreign Key Cart ID="+item1.getCart().getId());
System.out.println("item2 ID="+item2.getId()+", Foreign Key Cart ID="+item1.getCart().getId());
}catch(Exception e){
System.out.println("Exception occured. "+e.getMessage());
e.printStackTrace();
}finally{
if(!sessionFactory.isClosed()){
System.out.println("Closing SessionFactory");
sessionFactory.close();
}
}
}
}

56
spring-hibernate4/src/main/java/com/baeldung/hibernate/oneToMany/model/Cart.java Normal file
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@ -0,0 +1,56 @@
package com.baeldung.hibernate.oneToMany.model;
import java.util.Set;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
@Table(name="CART")
public class Cart {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="cart_id")
private long id;
@Column(name="total")
private double total;
@Column(name="name")
private String name;
@OneToMany(mappedBy="cart")
private Set<Items> items;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public double getTotal() {
return total;
}
public void setTotal(double total) {
this.total = total;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<Items> getItems() {
return items;
}
public void setItems(Set<Items> items) {
this.items = items;
}
}

74
spring-hibernate4/src/main/java/com/baeldung/hibernate/oneToMany/model/Items.java Normal file
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package com.baeldung.hibernate.oneToMany.model;
import javax.persistence.Column;
import javax.persistence.Entity;
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="ITEMS")
public class Items {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="id")
private long id;
@Column(name="item_id")
private String itemId;
@Column(name="item_total")
private double itemTotal;
@Column(name="quantity")
private int quantity;
@ManyToOne
@JoinColumn(name="cart_id", nullable=false)
private Cart cart;
//Hibernate requires no-args constructor
public Items(){}
public Items(String itemId, double total, int qty, Cart c){
this.itemId=itemId;
this.itemTotal=total;
this.quantity=qty;
this.cart=c;
}
public String getItemId() {
return itemId;
}
public void setItemId(String itemId) {
this.itemId = itemId;
}
public double getItemTotal() {
return itemTotal;
}
public void setItemTotal(double itemTotal) {
this.itemTotal = itemTotal;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public Cart getCart() {
return cart;
}
public void setCart(Cart cart) {
this.cart = cart;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
}

19
spring-hibernate4/src/main/resources/hibernate-annotation.cfg.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://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.password">bastard5</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/setup</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.show_sql">true</property>
<mapping class="com.baeldung.hibernate.model.Cart"/>
<mapping class="com.baeldung.hibernate.model.Items"/>
</session-factory>
</hibernate-configuration>

17
spring-hibernate4/src/main/resources/one_to_many.sql Normal file
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@ -0,0 +1,17 @@
CREATE TABLE `Cart` (
`cart_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`total` decimal(10,0) NOT NULL,
`name` varchar(10) DEFAULT NULL,
PRIMARY KEY (`cart_id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
CREATE TABLE `Items` (
`id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`cart_id` int(11) unsigned NOT NULL,
`item_id` varchar(10) NOT NULL,
`item_total` decimal(10,0) NOT NULL,
`quantity` int(3) NOT NULL,
PRIMARY KEY (`id`),
KEY `cart_id` (`cart_id`),
CONSTRAINT `items_ibfk_1` FOREIGN KEY (`cart_id`) REFERENCES `Cart` (`cart_id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;

43
spring-hibernate4/src/test/java/com/baeldung/hibernate/oneToMany/config/HibernateAnnotationUtilTest.java Normal file
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@ -0,0 +1,43 @@
package com.baeldung.hibernate.oneToMany.config;
import org.hibernate.SessionFactory;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
public class HibernateAnnotationUtilTest {
public HibernateAnnotationUtilTest() {
}
@BeforeClass
public static void setUpClass() {
}
@AfterClass
public static void tearDownClass() {
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
@Test
public void testGetSessionFactory() {
System.out.println("getSessionFactory");
SessionFactory expResult = null;
SessionFactory result = HibernateAnnotationUtil.getSessionFactory();
assertEquals(expResult, result);
fail("The test failed.");
}
}

40
spring-hibernate4/src/test/java/com/baeldung/hibernate/oneToMany/main/HibernateOneToManyAnnotationMainTest.java Normal file
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@ -0,0 +1,40 @@
package com.baeldung.hibernate.oneToMany.main;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
public class HibernateOneToManyAnnotationMainTest {
public HibernateOneToManyAnnotationMainTest() {
}
@BeforeClass
public static void setUpClass() {
}
@AfterClass
public static void tearDownClass() {
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
@Test
public void testMain() {
System.out.println("main");
String[] args = null;
HibernateOneToManyAnnotationMain.main(args);
fail("The test failed.");
}
}

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spring-hibernate4/src/test/java/com/baeldung/hibernate/oneToMany/model/CartTest.java Normal file
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@ -0,0 +1,111 @@
package com.baeldung.hibernate.oneToMany.model;
import java.util.Set;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
public class CartTest {
public CartTest() {
}
@BeforeClass
public static void setUpClass() {
}
@AfterClass
public static void tearDownClass() {
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
@Test
public void testGetId() {
System.out.println("getId");
Cart instance = new Cart();
long expResult = 0L;
long result = instance.getId();
assertEquals(expResult, result);
fail("The test failed.");
}
@Test
public void testSetId() {
System.out.println("setId");
long id = 0L;
Cart instance = new Cart();
instance.setId(id);
fail("The test failed.");
}
@Test
public void testGetTotal() {
System.out.println("getTotal");
Cart instance = new Cart();
double expResult = 0.0;
double result = instance.getTotal();
assertEquals(expResult, result, 0.0);
fail("The test failed.");
}
@Test
public void testSetTotal() {
System.out.println("setTotal");
double total = 0.0;
Cart instance = new Cart();
instance.setTotal(total);
fail("The test failed.");
}
@Test
public void testGetName() {
System.out.println("getName");
Cart instance = new Cart();
String expResult = "";
String result = instance.getName();
assertEquals(expResult, result);
fail("The test failed");
}
@Test
public void testSetName() {
System.out.println("setName");
String name = "";
Cart instance = new Cart();
instance.setName(name);
fail("The test failed.");
}
@Test
public void testGetItems() {
System.out.println("getItems");
Cart instance = new Cart();
Set<Items> expResult = null;
Set<Items> result = instance.getItems();
assertEquals(expResult, result);
fail("The test failed.");
}
@Test
public void testSetItems() {
System.out.println("setItems");
Set<Items> items = null;
Cart instance = new Cart();
instance.setItems(items);
fail("The test case failed");
}
}

131
spring-hibernate4/src/test/java/com/baeldung/hibernate/oneToMany/model/ItemsTest.java Normal file
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@ -0,0 +1,131 @@
package com.baeldung.hibernate.oneToMany.model;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
public class ItemsTest {
public ItemsTest() {
}
@BeforeClass
public static void setUpClass() {
}
@AfterClass
public static void tearDownClass() {
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
@Test
public void testGetItemId() {
System.out.println("getItemId");
Items instance = new Items();
String expResult = "";
String result = instance.getItemId();
assertEquals(expResult, result);
fail("The test failed.");
}
@Test
public void testSetItemId() {
System.out.println("setItemId");
String itemId = "";
Items instance = new Items();
instance.setItemId(itemId);
fail("The test failed.");
}
@Test
public void testGetItemTotal() {
System.out.println("getItemTotal");
Items instance = new Items();
double expResult = 0.0;
double result = instance.getItemTotal();
assertEquals(expResult, result, 0.0);
fail("The test failed.");
}
@Test
public void testSetItemTotal() {
System.out.println("setItemTotal");
double itemTotal = 0.0;
Items instance = new Items();
instance.setItemTotal(itemTotal);
fail("The test failed.");
}
@Test
public void testGetQuantity() {
System.out.println("getQuantity");
Items instance = new Items();
int expResult = 0;
int result = instance.getQuantity();
assertEquals(expResult, result);
fail("The test failed.");
}
@Test
public void testSetQuantity() {
System.out.println("setQuantity");
int quantity = 0;
Items instance = new Items();
instance.setQuantity(quantity);
fail("The test failed.");
}
@Test
public void testGetCart() {
System.out.println("getCart");
Items instance = new Items();
Cart expResult = null;
Cart result = instance.getCart();
assertEquals(expResult, result);
fail("The test failed.");
}
@Test
public void testSetCart() {
System.out.println("setCart");
Cart cart = null;
Items instance = new Items();
instance.setCart1(cart);
fail("The test failed.");
}
@Test
public void testGetId() {
System.out.println("getId");
Items instance = new Items();
long expResult = 0L;
long result = instance.getId();
assertEquals(expResult, result);
fail("The test failed.");
}
@Test
public void testSetId() {
System.out.println("setId");
long id = 0L;
Items instance = new Items();
instance.setId(id);
fail("The test failed.");
}
}
}