3 готовые сущности. Доработка связи многие ко многим и двух сущностей.

.idea/jpa-buddy.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JpaBuddyIdeaProjectConfig">
+    <option name="defaultUnitInitialized" value="true" />
+  </component>
+</project>

.idea/misc.xml

@@ -2,4 +2,7 @@
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="corretto-17" project-jdk-type="JavaSDK" />
+  <component name="ProjectType">
+    <option name="id" value="jpab" />
+  </component>
 </project>

.idea/uiDesigner.xml

@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Palette2">
+    <group name="Swing">
+      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
+      </item>
+      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.png" removable="false" auto-create-binding="false" can-attach-label="true">
+        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
+        <initial-values>
+          <property name="text" value="Button" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="RadioButton" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="CheckBox" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="Label" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JPasswordField" icon="/com/intellij/uiDesigner/icons/passwordField.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextPane" icon="/com/intellij/uiDesigner/icons/textPane.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JEditorPane" icon="/com/intellij/uiDesigner/icons/editorPane.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JComboBox" icon="/com/intellij/uiDesigner/icons/comboBox.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="2" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JTable" icon="/com/intellij/uiDesigner/icons/table.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JList" icon="/com/intellij/uiDesigner/icons/list.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="2" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSlider" icon="/com/intellij/uiDesigner/icons/slider.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSeparator" icon="/com/intellij/uiDesigner/icons/separator.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JProgressBar" icon="/com/intellij/uiDesigner/icons/progressbar.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1">
+          <preferred-size width="-1" height="20" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JScrollBar" icon="/com/intellij/uiDesigner/icons/scrollbar.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
+      </item>
+    </group>
+  </component>
+</project>

spring_online_calculator/build.gradle

@@ -4,7 +4,7 @@ plugins {
 	id 'io.spring.dependency-management' version '1.0.15.RELEASE'
 }
 
-group = 'com.example'
+group = 'labWork'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = '17'
 
@@ -14,8 +14,11 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
-	developmentOnly 'org.springframework.boot:spring-boot-devtools'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'com.h2database:h2:2.1.210'
+	implementation group: 'org.springdoc', name: 'springdoc-openapi-ui', version: '1.6.5'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
 }
 
 tasks.named('test') {

spring_online_calculator/src/main/java/labWork/premium_store/model/Client.java

@@ -0,0 +1,86 @@
+package labWork.premium_store.model;
+
+import javax.persistence.*;
+import javax.persistence.criteria.CriteriaBuilder;
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+public class Client {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    @Column(nullable = false, length = 255)
+    private String nickName;
+    @Column(nullable = false, length = 255)
+    private String email;
+    private Integer balance;
+    @ManyToMany(mappedBy = "clients")
+    private List<Tank> tanks;
+
+    public Client(){ }
+
+    public Client(String nickName, String email, Integer balance){
+        this.nickName = nickName;
+        this.email = email;
+        this.balance = balance;
+    }
+
+    public Long getId(){
+        return id;
+    }
+
+    public String getNickName(){
+        return nickName;
+    }
+
+    public void setNickName(String nickName){
+        this.nickName = nickName;
+    }
+
+    public String getEmail(){
+        return email;
+    }
+
+    public void setEmail(String email){
+        this.email = email;
+    }
+
+    public Integer getBalance(){
+        return balance;
+    }
+
+    public void setBalance(Integer balance){
+        this.balance = balance;
+    }
+
+    //метод для сравнения
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+
+        if (o == null || getClass() != o.getClass())
+            return false;
+
+        Client client = (Client) o;
+
+        return Objects.equals(id, client.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id);
+    }
+
+    //преобразование данных по объекту в строчку
+    @Override
+    public String toString() {
+        return "Student{" +
+                "id=" + id +
+                ", nickName='" + nickName + '\'' +
+                ", email='" + email + '\'' +
+                ", balance='" + balance + '\'' +
+                '}';
+    }
+}

spring_online_calculator/src/main/java/labWork/premium_store/model/Level.java

@@ -0,0 +1,61 @@
+package labWork.premium_store.model;
+
+import javax.persistence.*;
+import java.util.Objects;
+
+@Entity
+public class Level {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    @Column(nullable = false)
+    private int level;
+
+    public Level() {
+    }
+
+    public Level(int level) {
+        this.level = level;
+    }
+
+    //возвращает id
+    public Long getId() {
+        return id;
+    }
+
+    //возвращает нацию
+    public int getLevel() {
+        return level;
+    }
+
+    public void setLevel(int level) {
+        this.level = level;
+    }
+
+    //метод для сравнения
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+
+        if (o == null || getClass() != o.getClass())
+            return false;
+
+        Level level = (Level) o;
+
+        return Objects.equals(id, level.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id);
+    }
+
+    //преобразование данных по объекту в строчку
+    @Override
+    public String toString() {
+        return "Nation{" +
+                "id=" + id +
+                ", level='" + level + '}';
+    }
+}

spring_online_calculator/src/main/java/labWork/premium_store/model/Nation.java

@@ -0,0 +1,61 @@
+package labWork.premium_store.model;
+
+import javax.persistence.*;
+import java.util.Objects;
+
+@Entity
+public class Nation {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    @Column(nullable = false)
+    private String nation;
+
+    public Nation() {
+    }
+
+    public Nation(String nation) {
+        this.nation = nation;
+    }
+
+    //возвращает id
+    public Long getId() {
+        return id;
+    }
+
+    //возвращает нацию
+    public String getNation() {
+        return nation;
+    }
+
+    public void setNation(String nation) {
+        this.nation = nation;
+    }
+
+    //метод для сравнения
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+
+        if (o == null || getClass() != o.getClass())
+            return false;
+
+        Nation nation = (Nation) o;
+
+        return Objects.equals(id, nation.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id);
+    }
+
+    //преобразование данных по объекту в строчку
+    @Override
+    public String toString() {
+        return "Nation{" +
+                "id=" + id +
+                ", nation='" + nation + '}';
+    }
+}

spring_online_calculator/src/main/java/labWork/premium_store/model/Tank.java

@@ -0,0 +1,87 @@
+package labWork.premium_store.model;
+
+import javax.persistence.*;
+import java.util.List;
+
+@Entity
+public class Tank {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    @Column(nullable = false)
+    private String name;
+
+    @ManyToOne
+    @JoinColumn(name = "nation_id")
+    private Nation nation;
+
+    @ManyToOne
+    @JoinColumn(name = "level_id")
+    private Level level;
+
+    @ManyToMany
+    @JoinTable(name = "tanks_of_clients",
+            joinColumns = @JoinColumn(name = "tank_fk"),
+            inverseJoinColumns = @JoinColumn(name = "client_fk"))
+    private List<Client> clients;
+
+    @Column(nullable = false)
+    private int cost;
+
+    public Tank() {
+    }
+
+    public Tank(String name, int cost) {
+        this.name = name;
+        this.cost = cost;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getCost() {
+        return cost;
+    }
+
+    public void setCost(int cost) {
+        this.cost = cost;
+    }
+
+    public List<OrderProducts> getProducts() {
+        return products;
+    }
+
+    public void setProducts(List<OrderProducts> products) {
+        this.products = products;
+    }
+
+    public void addProduct(OrderProducts orderProducts){
+        if  (products == null){
+            this.products = new ArrayList<>();
+        }
+        if (!products.contains(orderProducts))
+            this.products.add(orderProducts);
+    }
+    public void removeProducts(OrderProducts orderProducts){
+        if (products.contains(orderProducts))
+            this.products.remove(orderProducts);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Order order)) return false;
+        return Objects.equals(getId(), order.getId()) && Objects.equals(getDate(), order.getDate()) && Objects.equals(getPrice(), order.getPrice());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getId(), getDate(), getPrice());
+    }
+}

spring_online_calculator/src/main/resources/application.properties

@@ -1 +1,6 @@
-
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=password
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.jpa.hibernate.ddl-auto=create-drop