No tables created in the MySQL database in Spring Boot application

No tables created in the MySQL database in Spring Boot application - java

Here is my Application.java:
#Configuration
#EnableAutoConfiguration(exclude =
{JpaRepositoriesAutoConfiguration.class})
#ComponentScan
#SpringBootApplication
public class UserFrontApplication {
public static void main(String[] args) {
SpringApplication.run(UserFrontApplication.class, args);
}
}
Contents of application.properties:
spring.datasource.driverClassName=org.gjt.mm.mysql.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/mydb
spring.datasource.username=root
spring.datasource.password=password
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.show-sql=false
spring.jpa.hibernate.ddl-auto=create
pom.xml:
http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
<groupId>com.userFront</groupId>
<artifactId>userfront</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>UserFront</name>
<description>User frontend for online banking</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.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-web</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-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>1.5.3.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.1.4.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.6-Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.3.Final</version>
</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 application runs fine but no tables are created.
User class that has to be stored in database:
#Entity
#Table(name = "user")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "userId", nullable = false, updatable = false)
private Long userId;
}

Why you are using org.hibernate.dialect.PostgreSQLDialect. you need to update dialect as per your database, update these two properties.
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.jpa.database-platform=org.hibernate.dialect.MySQLDialect

In your main class, try adding
#EntityScan(basePackages = {"packagename_where_entity_class_is_present"})
Hope it works!
OR
You can try reordering the packages i.e. for example, if your main class is in the package com.main, then let your entity class be in the package com.main.entity

Related

Spring does not see repository during scan on app start

Have sandbox springboot app. Decided to try reactive approach, postgres is used as database, I added r2dbc to the project to make my repository reactive. Here is my code:
#SpringBootApplication
public class Springboot2Application {
public static void main(String[] args) {
SpringApplication.run(Springboot2Application.class, args);
}
}
#Repository
public interface ToDoRepository extends
ReactiveCrudRepository<ToDo,String> {
}
#RestController
#RequestMapping("/api/v1")
public class ToDoController {
private final ToDoRepository repository;
public ToDoController(ToDoRepository repository) {
this.repository = repository;
}
#GetMapping(value = "/to-do", produces = {
MediaType.APPLICATION_JSON_VALUE,
MediaType.APPLICATION_XML_VALUE,
MediaType.TEXT_XML_VALUE})
public ResponseEntity<Flux<ToDo>> getToDos(#RequestHeader
HttpHeaders headers){
return ResponseEntity.ok().body(repository.findAll());
}
}
#Data
#RequiredArgsConstructor
#Entity
#Table(name = "todo")
public class ToDo {
#Id
#NotNull
#GeneratedValue(generator = "system-uuid")
#GenericGenerator(name = "system-uuid", strategy = "uuid")
private String id;
#NotNull
#NotBlank
private String description;
#CreationTimestamp
private Timestamp created;
#UpdateTimestamp
private Timestamp modified;
private boolean completed;
}
r2dbc config:
#Configuration
#EnableR2dbcRepositories(basePackages =
"com.springboot2.repository")
public class R2DBCConfig extends AbstractR2dbcConfiguration {
#Bean
public ConnectionFactory connectionFactory() {
return ConnectionFactories.get(
ConnectionFactoryOptions.builder()
.option(DRIVER, "postgresql")
.option(HOST, "localhost")
.option(PORT, 5432)
.option(USER, "admin")
.option(PASSWORD, "admin")
.option(DATABASE, "springdb")
.build());
}
}
On application start I'm getting:
Description:
Parameter 0 of constructor in com.springboot2.controller.ToDoController required a bean of type 'com.springboot2.repository.ToDoRepository' that could not be found.
Action:
Consider defining a bean of type 'com.springboot2.repository.ToDoRepository' in your configuration.
I tried to add #ComponentsScan, tried to move ToDoRepository to the root near Springboot2Application, I dont understand why Spring doesn't see repository interface
pom.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 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.springboot</groupId>
<artifactId>springboot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot2</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>8</java.version>
<spring-cloud.version>2021.0.3</spring-cloud.version>
<!-- <spring-shell.version>2.1.0</spring-shell.version>-->
</properties>
<dependencies>
<!-- DB,ORM, and plugins-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-r2dbc</artifactId>
</dependency>
<dependency>
<groupId>io.r2dbc</groupId>
<artifactId>r2dbc-postgresql</artifactId>
<version>0.8.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<!-- Reactive libs-->
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</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>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>

My guess the reason is that you have added r2dbc driver to your project, but haven't added spring-boot-starter-data-r2dbc
So, consider this dependency in your pom.xml file (this is the latest version at the time of writing this answer) :
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-r2dbc -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-r2dbc</artifactId>
<version>3.0.2</version>
</dependency>
EDIT:
Also you can try to use #EnableR2dbcRepositories and specify the package with your repository.
One more possible way to solve this is to extend your repository from R2dbcRepository, instead of ReactiveCrudRepository
This may help when you have multiple spring data reactive modules (r2dbc and something else) being used in the same project. Since ReactiveCrudRepository is a generic interface Spring does not know how to properly configure these beans.

Spring Cloud sleuth memory leak issue

I am facing issue with spring cloud sleuth as it is leaking memory as I have gone through the dumps of my applications:
What does 13.05mb (40.3%) of Java Static org.springframework.cloud.sleuth.instrument.async.SleuthContextListener.CACHE
Spring Cloud Version: Hoxton.SR8
Spring Boot Version: 2.3.3.RELEASE
Please find the heapdump report below:
https://heaphero.io/my-heap-report.jsp?p=YXJjaGl2ZWQvMjAyMS8wNS8yNS8tLWhlYXBkdW1wLTE2MjE5MjE0MzYyNTMuaHByb2YtNS00Ni0xLmpzb24=
pls find the code repo below, which I am using in my appplication, Also on first run there is no memory leakage issue but on successive runs it shows the memory leakage issue as mentioned in the heapdump report
package com.example.demo;
import java.util.Date;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
#SpringBootApplication
#EnableCaching
#EnableScheduling
public class DemoApplication {
Logger log = LoggerFactory.getLogger(DemoApplication.class);
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
#CacheEvict(cacheNames = { "config1", "config2" }, allEntries = true)
#Scheduled(fixedDelay = 60000 * 5)
public void cacheEvict() {
log.info("Evicting all cache at: {}", new Date());
}
}
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>2.1.4.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.demo</groupId>
<artifactId>demo-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo-service</name>
<description>demo</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-ses -->
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-ses</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.mail/javax.mail-api -->
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.ht</groupId>
<artifactId>subscription-core-library</artifactId>
<version>0.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>subscription-core-library-stg</id>
<name>subscription-core-library-stg</name>
<url>${repo.url}</url>
</repository>
</repositories>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.SR4</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-dependencies</artifactId>
<version>2.1.6</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
</project>
TIA

You have a complete mix of versions. Why do you say that you're using Hoxton and Boot 2.3 if you're not using Hoxton, you're using Greenwich and Boot 2.1
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.4.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.SR4</version>
<type>pom</type>
<scope>import</scope>
</dependency>
Please upgrade to the latest version of Sleuth and Boot. Please replicate this issue by going to start.spring.io and generating a new, fresh project.
Update:
With the 2020.0.3 release I've changed one class that used to cache a bean factory in such a way that now it stores a hash of that class.

Spring boot maven multiple module project: Compilation failure cannot find symbol

I created a multiple module spring boot project with a parent pom.
In the module test-data, i added some Entities-Classes User and Login:
#Table
#Entity
public class Login implements Serializable {
... another column
#Column(unique = true, columnDefinition = "VARCHAR(50)", nullable = false)
private String username;
#JsonIgnore
#OneToOne(mappedBy = "login")
private User user;
// getter and setter
The User class:
#Table
#Entity
public class User implements Serializable{
...
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(referencedColumnName = "login_id")
private Login login;
...
The pom.xml of module test-data:
<parent>
<groupId>com.emo.test</groupId>
<artifactId>emo-parent</artifactId>
<version>1.0-SNAPSHOT</version>
<relativePath/>
</parent>
<artifactId>test-data</artifactId>
<version>0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<description>Demo project for Spring Boot</description>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
// other dependencies
</dependencies>
The main class of test-data:
package com.test;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
#SpringBootApplication
public class TestApplication {
public static void main(String[] args) {
SpringApplication.run(TestApplication.class, args);
}
The main class of test-oauth:
package com.oauth.server;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class OAuthApplication {
public static void main(String[] args) {
SpringApplication.run(OAuthApplication.class, args);
}
I added the module test-data in the second module test-oauth as dependency like this:
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.emo.test</groupId>
<artifactId>emo-parent</artifactId>
<version>1.0-SNAPSHOT</version>
<relativePath/>
</parent>
<artifactId>test-oauth</artifactId>
<version>0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>test-oauth</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>com.emo.test</groupId>
<artifactId>test-data</artifactId>
<version>0.1-SNAPSHOT</version>
<exclusions>
<exclusion>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
Into the module test-oauth, i use the entity User:
#Transactional
#Service("userServiceImpl")
public class UserServiceImpl {
#PersistenceContext
private EntityManager entityManager;
public User findByUsername(String username) throws EmptyResultDataAccessException {
String query = "FROM Login l WHERE l.username = :username";
final Login l = (Login) entityManager.createQuery(query).setParameter("username", username).getSingleResult();
return l.getUser();
}
}
I got this exception: Compilation failure: Compilation failure: cannot find symbol User, package com.test.core.entities does not exist
My Parent pom.xml
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.emo.test</groupId>
<artifactId>emo-parent</artifactId>
<version>0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<modules>
<module>test-data</module>
<module>test-oauth</module>
</modules>
<properties>
<java.version>1.11</java.version>
<oauth.version>2.2.2.RELEASE</oauth.version>
<kazi.data.version>0.1-SNAPSHOT</kazi.data.version>
</properties>
<dependencies>
<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>
<dependency>
<groupId>org.springframework.security.oauth</groupId>
<artifactId>spring-security-oauth2</artifactId>
<version>${oauth.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<verbose>true</verbose>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-plugin-releases</id>
<url>https://repo.spring.io/plugins-release</url>
</pluginRepository>
</pluginRepositories>

Hibernate doesn't auto-create table

pom.xml :
<dependencies>
...
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.0.3.Final</version>
</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>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
entity:
#Entity
#Table(name = "person")
public class Person {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int personId;
#Column(name = "first_name")
private String firstName;
}
application.properties
spring.datasource.url=jdbc:mysql://localhost:3306/socialmedia?
allowPublicKeyRetrieval=true&useSSL=false
spring.datasource.username=username
spring.datasource.password=password
spring.datasource.driver.class=com.mysql.cj.jdbc.Driver
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.properties.hibernate.default_schema = socialmedia
spring.jpa.hibernate.ddl-auto = create-drop
spring.jpa.show-sql = true
Hibernate doesn't auto-create tables, I have set the properties and entity classes and the dependencies still the schema remains empty after I run the code. No error messages are shown.

Your strategy is:
spring.jpa.hibernate.ddl-auto = create-drop
This means that Hibernate creates the tables and after the program runs the tables are deleted. That's why you don't see any tables.
You have to use create (only creates tables) or update (also alters the tables):
spring.jpa.hibernate.ddl-auto = update
Then I don't see the JPA starter project in your pom.xml but you have Hibernate dependencies that are not necessary. Your pom.xml should look like:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</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>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
spring-boot-starter-data-jpa will autoconfigure Hibernate.

JPA is not executing any query

I'm Stuck with JPA since two days , im trying to save a new Object to database but i got no luck with it, it's just throw no exception so i don't know what is going on. why my code is not working
here is the controller
#RestController
public class RealEstatesViewController {
#Autowired
private RealEstateRepository realEstatesViewRepository;
#RequestMapping(value = "/realEstatesView", method = RequestMethod.POST, consumes = "application/json")
public ResponseEntity<String> addRealEstatesClass(#RequestBody ArrayList<RealEstatesView> realEstatesViews)
throws Exception {
realEstatesViewRepository.save(realEstatesViews);
return new ResponseEntity<>(HttpStatus.OK);
}
}
here is my Model i implemented my columns with my tables
#Entity
#Table(name = "real_estates_views")
public class RealEstatesView {
#GeneratedValue
#Id
#Column(name = "real_estate_view_id")
private int realEstateViewId;
#Column(name = "real_estate_offer_id")
private int realEstateOfferId;
#Column(name = "real_estate_view_date")
private String realEstateViewDate;
#Column(name = "real_estate_view_time")
private String realEstateViewTime;
}
here is my repo
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.akarat.demo.model.RealEstatesView;
#Repository
public interface RealEstateRepository extends CrudRepository<RealEstatesView, Integer> {
}
and my 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>AkaratDemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>AkaratDemo</name>
<description>Demo project for Akarat</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.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-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-actuator-docs</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.2</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.8-dmr</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
finally the resource folder
spring.jpa.hibernate.ddl-auto=none
spring.datasource.url=jdbc:mysql://localhost:3307/demo?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name= com.mysql.jdbc.Driver
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
logging.level.org.hibernate.SQL=DEBUG
logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE

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No tables created in the MySQL database in Spring Boot application - java

Why you are using org.hibernate.dialect.PostgreSQLDialect. you need to update dialect as per your database, update these two properties. spring.datasource.driverClassName=com.mysql.jdbc.Driver spring.jpa.database-platform=org.hibernate.dialect.MySQLDialect

In your main class, try adding #EntityScan(basePackages = {"packagename_where_entity_class_is_present"}) Hope it works! OR You can try reordering the packages i.e. for example, if your main class is in the package com.main, then let your entity class be in the package com.main.entity

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