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Spring Boot is not creating Tables automatically in MySql

I am new to Spring boot and just trying to create the tables using hibernate in spring boot but Unable to do so. Below are my code and configurations
User.java (Entity)
#Entity
#Table(name = "users")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String userName;
private String password;
private String first_name;
private String lastName;
private String email;
private String phone;
private boolean enabled = true;
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.rafey</groupId>
<artifactId>examback</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>examback</name>
<description>backend for exam portal.</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
application.properties file
#database configuration
spring.datasource.url = jdbc:mysql://localhost:3306/examportal
spring.datasource.username = root
spring.datasource.password =
spring.datasource.driver-class = com.cj.jdbc.Driver
#JPA configuration
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
spring.jpa.hibernate.ddl-auto=create-drop
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
spring.jpa.open-in-view
these are the logs
2022-09-05 03:21:44.420 INFO 5320 --- [ main] com.rafey.examback.ExambackApplication : Starting ExambackApplication using Java 11.0.16 on Abdur-PC with PID 5320 (C:\Users\Rafey\Desktop\examportal\examback\examback\target\classes started by Rafey in C:\Users\Rafey\Desktop\examportal\examback\examback)
2022-09-05 03:21:44.427 INFO 5320 --- [ main] com.rafey.examback.ExambackApplication : No active profile set, falling back to 1 default profile: "default"
2022-09-05 03:21:45.676 INFO 5320 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2022-09-05 03:21:45.714 INFO 5320 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 13 ms. Found 0 JPA repository interfaces.
2022-09-05 03:21:47.194 INFO 5320 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2022-09-05 03:21:47.216 INFO 5320 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2022-09-05 03:21:47.216 INFO 5320 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.65]
2022-09-05 03:21:47.539 INFO 5320 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2022-09-05 03:21:47.540 INFO 5320 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2992 ms
2022-09-05 03:21:47.934 INFO 5320 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2022-09-05 03:21:48.018 INFO 5320 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.10.Final
2022-09-05 03:21:48.270 INFO 5320 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2022-09-05 03:21:48.417 INFO 5320 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2022-09-05 03:21:48.996 INFO 5320 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2022-09-05 03:21:49.019 INFO 5320 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
2022-09-05 03:21:49.391 INFO 5320 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2022-09-05 03:21:49.416 INFO 5320 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2022-09-05 03:21:50.098 INFO 5320 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2022-09-05 03:21:50.114 INFO 5320 --- [ main] com.rafey.examback.ExambackApplication : Started ExambackApplication in 6.728 seconds (JVM running for 7.678)
This is my main class
#SpringBootApplication
public class ExambackApplication {
public static void main(String[] args) {
SpringApplication.run(ExambackApplication.class, args);
}
}
help me resolving this issue. Thanks

H2 console doesn't Create Table with Entity Class

Yo, cant resolve this simply problem in h2-console..
I want just create table via Entity class like "MOvie" or "director" but when i open my h2-console,is not created, pls help
POM
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>sk.wynny</groupId>
<artifactId>springLearn</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springLearn</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
app-properties
spring.h2.console.enabled= true
spring.datasource.url=jdbc:h2:mem:wynny
spring.datasource.username=root
MOVIE CLASS
package sk.wynny.modul;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
#Entity
public class Movie {
#Id
#GeneratedValue
private Long id;
private String name;
public Movie() {
}
public Movie(Long id, String name) {
this.id = id;
this.name = name;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
LOGs
2022-02-13 20:11:37.031 INFO 5856 --- [ main] s.w.springLearn.SpringLearnApplication : Starting SpringLearnApplication using Java 17.0.1 on DESKTOP-K3O8I67 with PID 5856 (C:\Users\Patrik Severín\IdeaProjects\springLearn\target\classes started by Wynny in C:\Users\Patrik Severín\IdeaProjects\springLearn)
2022-02-13 20:11:37.034 INFO 5856 --- [ main] s.w.springLearn.SpringLearnApplication : No active profile set, falling back to default profiles: default
2022-02-13 20:11:37.638 INFO 5856 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2022-02-13 20:11:37.653 INFO 5856 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 5 ms. Found 0 JPA repository interfaces.
2022-02-13 20:11:38.249 INFO 5856 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2022-02-13 20:11:38.260 INFO 5856 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2022-02-13 20:11:38.260 INFO 5856 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.56]
2022-02-13 20:11:38.362 INFO 5856 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2022-02-13 20:11:38.363 INFO 5856 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1281 ms
2022-02-13 20:11:38.398 INFO 5856 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2022-02-13 20:11:38.553 INFO 5856 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2022-02-13 20:11:38.563 INFO 5856 --- [ main] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:wynny'
2022-02-13 20:11:38.735 INFO 5856 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2022-02-13 20:11:38.789 INFO 5856 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.4.Final
2022-02-13 20:11:38.949 INFO 5856 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2022-02-13 20:11:39.073 INFO 5856 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2022-02-13 20:11:39.263 INFO 5856 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2022-02-13 20:11:39.273 INFO 5856 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2022-02-13 20:11:39.321 WARN 5856 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2022-02-13 20:11:39.602 WARN 5856 --- [ main] ion$DefaultTemplateResolverConfiguration : Cannot find template location: classpath:/templates/ (please add some templates or check your Thymeleaf configuration)
2022-02-13 20:11:39.734 INFO 5856 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2022-02-13 20:11:39.746 INFO 5856 --- [ main] s.w.springLearn.SpringLearnApplication : Started SpringLearnApplication in 3.068 seconds (JVM running for 3.417)
i following many videos or manuals and still have same problem, is here some Hero what can resolve it ? :D

Problem was in Thymeleaf engine, if i create spring only with h2,web and jpa is working nicely.Idk why problem is with Thymeleaf..

Trying to save Object in Postgresql database unsuccesfully (no exception)

I try to save object in Postgresql database but unsuccesfully. Application starts normally, no exception is thrown and companiesRepository is not null. The database has been created manually.
This is my Application.class:
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
This is my Service.class:
#org.springframework.stereotype.Service
public class Service {
#Autowired
CompaniesRepository companiesRepository;
public void start() {
Companies companies = new Companies();
companies.setSomeString("some");
companies.setId(1);
companiesRepository.save(companies);
log.info("Companies saved in DB");
}
}
This is my Companies.class:
#Entity
#Data
public class Companies {
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Id
Integer id;
String someString;
}
This is my CompaniesRepository interface:
#Repository
public interface CompaniesRepository extends CrudRepository<Companies, Integer> {
}
This is my Controller.class:
#RestController
public class Controller {
#Autowired
private Service service;
#RequestMapping("/")
public String start() throws Exception {
service.start();
return "App Started";
}
}
The configuration I have in bootstrap.yaml file works properly in another project:
spring:
jpa:
database-platform: org.hibernate.dialect.PostgreSQLDialect
show-sql: false
generate-ddl: true
time_zone: UTC
hibernate:
ddl-auto: update
properties:
hibernate:
dialect: org.hibernate.dialect.PostgreSQLDialect
hbm2ddl:
auto: update
jdbc:
lob:
non_contextual_creation: true
enable_lazy_load_no_trans: true
datasource:
url: jdbc:postgresql://localhost:5432/dos?createDatabaseIfNotExist=true&serverTimezone=UTC
driver-class-name: org.postgresql.Driver
username: "postgres"
password: "123"
initialization-mode: always
hibernate:
dialect: org.hibernate.dialect.PostgreSQLDialect
jdbc:
time_zone: UTC
I tried to:
annottate String and id in Companies.class with #Column(nullable = false),
changed table name for Companies.class with #Table(name = "some_table").
add #Autowired CompaniesRepository repository; in Controller.class
EDIT:
Those are the console logs:
2020-03-07 15:35:11.620 INFO 2484 --- [ main] com.xtb.tradebot.Application : Starting Application on MWNB00049 with PID 2484 (C:\Users\Piotr\Documents\trade-bot\trade-bot\target\classes started by Piotr in C:\Users\Piotr\Documents\trade-bot\trade-bot)
2020-03-07 15:35:11.622 INFO 2484 --- [ main] com.xtb.tradebot.Application : No active profile set, falling back to default profiles: default
2020-03-07 15:35:12.179 INFO 2484 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2020-03-07 15:35:12.255 INFO 2484 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 63ms. Found 1 JPA repository interfaces.
2020-03-07 15:35:12.638 INFO 2484 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-03-07 15:35:13.123 INFO 2484 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-03-07 15:35:13.137 INFO 2484 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-07 15:35:13.137 INFO 2484 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.30]
2020-03-07 15:35:13.226 INFO 2484 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-07 15:35:13.226 INFO 2484 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1563 ms
2020-03-07 15:35:13.390 INFO 2484 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-03-07 15:35:13.673 INFO 2484 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-03-07 15:35:13.735 INFO 2484 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-03-07 15:35:13.830 INFO 2484 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.4.10.Final}
2020-03-07 15:35:13.995 INFO 2484 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-03-07 15:35:14.131 INFO 2484 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2020-03-07 15:35:14.731 INFO 2484 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-03-07 15:35:14.735 INFO 2484 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-03-07 15:35:15.011 WARN 2484 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-03-07 15:35:15.134 INFO 2484 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-03-07 15:35:15.369 INFO 2484 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-03-07 15:35:15.371 INFO 2484 --- [ main] com.xtb.tradebot.Application : Started Application in 4.035 seconds (JVM running for 4.357)
Logs after controller "/" endpoint called:
2020-03-07 16:28:40.365 INFO 20336 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-03-07 16:28:40.365 INFO 20336 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2020-03-07 16:28:40.374 INFO 20336 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet : Completed initialization in 9 ms
This is pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.4.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.xtb</groupId>
<artifactId>trade-bot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>trade-bot</name>
<description>trade-bot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

I deleted h2.database dependency and I added:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
<version>2.0.2.RELEASE</version>
</dependency>
And I added in bootstrap.yaml:
spring:
main:
allow-bean-definition-overriding: true
And now it works fine.

problem with spring boot component scanning

I am writing spring boot application which has two entity classes Teacher and Department. I am using JPA and H2 in-memory database. When i run the application tables are not creating in h2 database. I have specified package to scan using #componentScan annotation but i thinks spring is not finding location of entity classes.
Application class-
package com.H2DatabaseDemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
#SpringBootApplication
#ComponentScan(basePackages="com.H2DatabaseDemo")
public class H2DatabaseDemoApplication {
public static void main(String[] args) {
SpringApplication.run(H2DatabaseDemoApplication.class, args);
}
}
Aauthor Entity-
package com.H2DatabaseDemo.model;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
#Entity
public class Author {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private long id;
private String title;
private String body;
public Author() {}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
}
Post entity-
package com.H2DatabaseDemo.model;
import java.awt.List;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
#Entity
public class Post {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private long id;
private String name;
public Post() {}
public Post(long id, String name) {
this.id = id;
this.name = name;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Here is my project directory structure
here is my pom.xml file-
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.H2DatabaseDemo</groupId>
<artifactId>H2DatabaseDemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>H2DatabaseDemo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Stack trace-
:: Spring Boot :: (v2.0.4.RELEASE)
2018-09-13 18:00:07.448 INFO 12584 --- [ main] c.H.H2DatabaseDemoApplication : Starting H2DatabaseDemoApplication on DESKTOP-7NILS0D with PID 12584 (D:\springCourse\H2DatabaseDemo\target\classes started by Mrugesh in D:\springCourse\H2DatabaseDemo)
2018-09-13 18:00:07.453 INFO 12584 --- [ main] c.H.H2DatabaseDemoApplication : No active profile set, falling back to default profiles: default
2018-09-13 18:00:07.539 INFO 12584 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#17c1bced: startup date [Thu Sep 13 18:00:07 IST 2018]; root of context hierarchy
2018-09-13 18:00:09.114 INFO 12584 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$934327a5] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-09-13 18:00:09.860 INFO 12584 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2018-09-13 18:00:09.892 INFO 12584 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-09-13 18:00:09.893 INFO 12584 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.32
2018-09-13 18:00:09.903 INFO 12584 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jre1.8.0_171\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Program Files/Java/jre1.8.0_171/bin/server;C:/Program Files/Java/jre1.8.0_171/bin;C:/Program Files/Java/jre1.8.0_171/lib/amd64;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files\Intel\iCLS Client\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;c:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\nodejs\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Git\cmd;C:\Program Files\Microsoft VS Code\bin;C:\Program Files\Microsoft VS Code\bin;C:\Users\Mrugesh\AppData\Roaming\npm;C:\Users\Mrugesh\AppData\Local\Microsoft\WindowsApps;C:\Users\Mrugesh\AppData\Local\GitHubDesktop\bin;C:\eclipse;;.]
2018-09-13 18:00:10.046 INFO 12584 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-09-13 18:00:10.047 INFO 12584 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2516 ms
2018-09-13 18:00:10.173 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-09-13 18:00:10.179 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet webServlet mapped to [/console/]
2018-09-13 18:00:10.188 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/]
2018-09-13 18:00:10.189 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/]
2018-09-13 18:00:10.189 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/]
2018-09-13 18:00:10.189 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-09-13 18:00:10.392 INFO 12584 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2018-09-13 18:00:10.667 INFO 12584 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2018-09-13 18:00:10.733 INFO 12584 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2018-09-13 18:00:10.754 INFO 12584 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2018-09-13 18:00:10.863 INFO 12584 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.2.17.Final}
2018-09-13 18:00:10.864 INFO 12584 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2018-09-13 18:00:10.910 INFO 12584 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2018-09-13 18:00:11.034 INFO 12584 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2018-09-13 18:00:11.581 INFO 12584 --- [ main] o.h.t.schema.internal.SchemaCreatorImpl : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl#6bcc3f27'
2018-09-13 18:00:11.585 INFO 12584 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-09-13 18:00:11.700 INFO 12584 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [//favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-09-13 18:00:12.010 INFO 12584 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#17c1bced: startup date [Thu Sep 13 18:00:07 IST 2018]; root of context hierarchy
2018-09-13 18:00:12.060 WARN 12584 --- [ main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2018-09-13 18:00:12.147 INFO 12584 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-09-13 18:00:12.149 INFO 12584 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-09-13 18:00:12.183 INFO 12584 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-09-13 18:00:12.183 INFO 12584 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-09-13 18:00:12.558 INFO 12584 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-09-13 18:00:12.560 INFO 12584 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'dataSource' has been autodetected for JMX exposure
2018-09-13 18:00:12.565 INFO 12584 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource]
2018-09-13 18:00:12.605 INFO 12584 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2018-09-13 18:00:12.610 INFO 12584 --- [ main] c.H.H2DatabaseDemoApplication : Started H2DatabaseDemoApplication in 5.598 seconds (JVM running for 6.203)

Your entities classes are fine but your H2 console is configured with the default db (testdb if i'm not wrong). You should at least specify the URL in your H2 Console to match your db name or the other way around.
You may try the following approach:
1 In the application.properties file configure H2 console access control:
spring.h2.console.enabled=true
spring.h2.console.path=/h2-console
spring.datasource.url=jdbc:h2:mem:hddemo-app
2 Access the db from http://localhost:8080/h2-console/
3 Inside the H2 Console, Copy and paste jdbc:h2:mem:hddemo-app in the JDBC URL field. Leave the password field empty and click the connect button.
4 You should see the entity you specified in your project as a table.

Try configurate
hibernate.hbm2ddl.auto
value to be create by adding following line in the application.properties.
spring.jpa.hibernate.ddl-auto=create
I have the same problem so I tried this and it works.
Hope this helps.

In Spring you have two annotations for scanning:
- ComponentScan for scanning Component annotated classes and generating beans out of them (https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/context/annotation/ComponentScan.html), and
- EntityScan for generating information for JPA and others for the entities (https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/autoconfigure/domain/EntityScan.html)
In your case, since you are trying to generate entitites and not beans/components, you should use #EntityScan.
N.B.: Spring also supports auto configuration: https://docs.spring.io/spring-boot/docs/current/reference/html/using-boot-auto-configuration.html

My spring-app doesn't receive my GET

So I've been trying to do the example from spring's official guide on connecting Spring with MySQL (https://spring.io/guides/gs/accessing-data-mysql/)
I didn't follow it 100% since I'm using STS for my overall project. The thing is when I use POSTMAN or just my browser to send data
such as :
localhost:8000/demo/add?name=First&email=someemail#someemailprovider.com
I get the error not found.
The java code is the same as in the guide . My application.properties is this:
server.port=8000
spring.jpa.hibernate.ddl-auto=create
spring.datasource.url=jdbc:mysql://localhost:3306/db_example
spring.datasource.username=springuser
spring.datasource.password=ThePassword
and my pom.xml is this
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>dbDemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>dbDemo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
The answer from my browser is:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing
this as a fallback.
Tue Jul 10 21:15:52 EEST 2018
There was an unexpected error (type=Not Found, status=404).
No message available
And from postman :
{
"timestamp": "2018-07-10T18:08:28.208+0000",
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/demo/add"
}
The log from spring's console is :
:: Spring Boot :: (v2.0.3.RELEASE)
2018-07-10 20:32:36.453 INFO 7815 --- [ main] com.example.demo.DbDemoApplication : Starting DbDemoApplication on max-kans with PID 7815 (/home/max/Desktop/Fetina/Earino/projectTL/softEngine/dbDemo/target/classes started by max in /home/max/Desktop/Fetina/Earino/projectTL/softEngine/dbDemo)
2018-07-10 20:32:36.496 INFO 7815 --- [ main] com.example.demo.DbDemoApplication : No active profile set, falling back to default profiles: default
2018-07-10 20:32:36.742 INFO 7815 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#2aa5fe93: startup date [Tue Jul 10 20:32:36 EEST 2018]; root of context hierarchy
2018-07-10 20:32:41.650 INFO 7815 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$5ab04215] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-07-10 20:32:42.775 INFO 7815 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8000 (http)
2018-07-10 20:32:43.344 INFO 7815 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-07-10 20:32:43.344 INFO 7815 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.31
2018-07-10 20:32:44.326 INFO 7815 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
2018-07-10 20:32:47.580 INFO 7815 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-07-10 20:32:47.581 INFO 7815 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 10868 ms
2018-07-10 20:32:48.187 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-07-10 20:32:48.192 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-07-10 20:32:48.193 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-07-10 20:32:48.193 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-07-10 20:32:48.193 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-07-10 20:32:50.090 INFO 7815 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2018-07-10 20:32:54.757 INFO 7815 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2018-07-10 20:32:55.307 INFO 7815 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2018-07-10 20:32:55.640 INFO 7815 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2018-07-10 20:32:58.848 INFO 7815 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.2.17.Final}
2018-07-10 20:32:59.125 INFO 7815 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2018-07-10 20:33:00.513 INFO 7815 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2018-07-10 20:33:02.175 INFO 7815 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2018-07-10 20:33:03.329 INFO 7815 --- [ main] o.h.t.schema.internal.SchemaCreatorImpl : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl#7a8406c2'
2018-07-10 20:33:03.331 INFO 7815 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-07-10 20:33:06.623 INFO 7815 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-10 20:33:08.065 INFO 7815 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#2aa5fe93: startup date [Tue Jul 10 20:32:36 EEST 2018]; root of context hierarchy
2018-07-10 20:33:08.206 WARN 7815 --- [ main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2018-07-10 20:33:08.322 INFO 7815 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-07-10 20:33:08.324 INFO 7815 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-07-10 20:33:08.368 INFO 7815 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-10 20:33:08.368 INFO 7815 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-10 20:33:09.610 INFO 7815 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-07-10 20:33:09.613 INFO 7815 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'dataSource' has been autodetected for JMX exposure
2018-07-10 20:33:09.622 INFO 7815 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource]
2018-07-10 20:33:10.003 INFO 7815 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8000 (http) with context path ''
2018-07-10 20:33:10.154 INFO 7815 --- [ main] com.example.demo.DbDemoApplication : Started DbDemoApplication in 35.885 seconds (JVM running for 39.933)
2018-07-10 20:34:07.354 INFO 7815 --- [nio-8000-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-07-10 20:34:07.354 INFO 7815 --- [nio-8000-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-07-10 20:34:07.962 INFO 7815 --- [nio-8000-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 608 ms
My controller is pretty much identical to the one from spring's guide :
package hello;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import hello.User;
import hello.UserRepository;
#Controller // This means that this class is a Controller
#RequestMapping(path="/demo")
// This means URL's start with /demo (after Application path)
public class UserController {
#Autowired
// This means to get the bean called userRepository
// Which is auto-generated by Spring, we will use it to handle the data
private UserRepository userRepository;
#GetMapping(path="/add") // Map ONLY GET Requests
public #ResponseBody String addNewUser(#RequestParam String name,
#RequestParam String email) {
// #ResponseBody means the returned String is the response,
// not a view name
User n = new User();
n.setName(name);
n.setEmail(email);
userRepository.save(n);
return "Saved";
}
#GetMapping(path="/all")
public #ResponseBody Iterable<User> getAllUsers() {
// This returns a JSON or XML with the users
return userRepository.findAll();
}
}

Your #SpringBootApplication class is in the package com.example.demo (according to the startup log), but your #Controller is in package hello. By default, Spring Boot won't auto-discover Spring classes that are outside the package the #SpringBootApplication class is in. Either move the UserController somewhere under the com.example.demo, or add #ComponentScan annotation targeting your hello package to the main Spring Boot app class.