Error Creating bean with name 'entityManagerFactory' defined in class path Resource

Question

Good night,

I have an application using Spring boot 1.5.10. I’m trying to make the connection to the oracle database, but I always have this title error.

Attempts:

• I went back to the spring boot version (which stopped giving the error, but returned a blank json and displayed on the console as if making the HQL query. But in this previous version gave several problems at door 8080);
• I already took and added Hibernate;
• I already ran mvn dependency:purge-local-Repository + Maven update;
• I’ve already changed banks.

Model

import java.util.Date;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class Tconta {

@Id
@GeneratedValue
private Long codigo;
private Double valor;
(...)   

public Long getCodigo() {
    return codigo;
}
public void setCodigo(Long codigo) {
    this.codigo = codigo;
(...)

Controller

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import br.com.academia.model.Tconta;
import br.com.academia.repository.Contas;

@RestController
@RequestMapping("/contas")
public class ContaController {

@Autowired
private Contas ContasRepository;

@RequestMapping(method = RequestMethod.GET)
public ResponseEntity<List<Tconta>> show()
{
       return new ResponseEntity<List<Tconta>>(ContasRepository.findAll(), 
   HttpStatus.OK);
  }
}

Repository

package br.com.academia.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import br.com.academia.model.Tconta;

public interface Contas extends JpaRepository<Tconta, Long>{

//public Tconta findByCode(int codigo);
}

POM

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.10.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>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
    <!--Ja testei com e sem a hibernate-entitymanager-->
      <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>5.0.3.Final</version>
    </dependency>
</dependencies>

console message

Error starting ApplicationContext. To display the auto-configuration report 
re-run your application with 'debug' enabled.
2018-02-06 00:26:24.649 ERROR 7104 --- [           main] 
o.s.boot.SpringApplication               : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean 
with name 'entityManagerFactory' defined in class path resource [org/ 
springframework/ boot/ autoconfigure/ orm /jpa / 
HibernateJpaAutoConfiguration.cl
ass]: Invocation of init method failed; nested exception is 
java.lang.NoClassDefFoundError: javassist/bytecode/ClassFile
at 
org.springframework. beans. factory. support. 
AbstractAutowireCapableBeanFactory.initializeBean ( 
AbstractAutowireCapableBeanFactory.java:1628 )  ~[ spring-beans-
4.3.14.RELEASE.jar:4.3.14.RELEASE]
at (...)
Caused by: java.lang.NoClassDefFoundError: javassist/bytecode/ClassFile

Answer 1

Add the javassist dependency:

<dependency>
    <groupId>org.javassist</groupId>
    <artifactId>javassist</artifactId>
    <version>3.20.0-GA</version>
</dependency>

You need to add to "Dependency Maven".

right click on your project and choose estates.

click on Deployment Assembly.

click on add

click on Java Build Path Entries

select Maven Dependencies

click on Finish.

Take a look here..

How to use Mysql in Java EE?

Answer 2

Test use the following dependencies:

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>4.1.4.Final</version>
</dependency>

Also use:

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>5.2.3.Final</version>
</dependency>