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I'am new with spring boot. I'am using Spring boot (4) data JPA and MySQL. The method findall worked fine for me for the class fournisseur but the save method wont work. Here my class:

When I run the SpringBoot application in Workspace-Spring-Tool-Suite Mysql Workbench generate all the tables But a Get request in Postman (http://localhost:3308/api/v1/employees) does not return anything but an error (Error: getaddrinfo ENOTFOUND http)

• Mysql Xampp is Running on port: 3308

UPDATE now the connection is working and generating tables on MYSQL workbench but the localhost's problem still exists it returns ERR_INVALID_HTTP_RESPONSE The WORST is a new problem while running SpringBoot App:ERROR

Description: Web server failed to start. Port 3308 was already in use. Action: Identify and stop the process that's listening on port 3308 or configure this application to listen on another port.

NB: I didn't use port 3308 for any other service.

application.properties

I am trying to adhere to Java Style Guide as suggested by Error Prone.

Section 7.2 The summary fragment states the following:

Each Javadoc block begins with a brief summary fragment. This fragment is very important: it is the only part of the text that appears in certain contexts such as class and method indexes.

This is a fragment—a noun phrase or verb phrase, not a complete sentence. It does not begin with A {@code Foo} is a..., or This method returns..., nor does it form a complete imperative sentence like Save the record.. However, the fragment is capitalized and punctuated as if it were a complete sentence.

Here is what I would like to know:

• What exactly is a summary fragment? It is stated that every Javadoc block begins with it and that it is text, but is there more documentation somewhere that I might read to get a better understanding about it?
• Why is the summary fragment very important? It is stated that it appears in class and method indexes, but I am not sure I understand what that means or why it is important. My best guess would be that it is a way to mark classes and it's members in such a way where it would be easier to search them.
• Where can I find and read the summary fragment? I am using IntelliJ IDEA, so I know how to access Javadoc for classes and members in code via inspection, but is there a way to list all available summary fragments?

I have a basic test for an embedded database that I'm trying to get working for a java project. As it stands now I am able to save rows to the database with my entity repository object, and after the app finishes running, I can connect to the database with intellij and see those rows are still there. But then, if I comment out the save methods and run it again, when I check the database after it finishes, the database is empty.

Hi I've created an Angular app with a Spring Boot/Spring Security backend using this guide:

https://www.javaguides.net/2019/04/spring-boot-spring-security-angular-example-tutorial.html

In my Controller class I have the following simple method to request:

I created dynamic project by using Eclipse. In this project , I have added the hibernate Configuration for mysql database. I am using the servlet for crud operations. I know in maven project the required dependency can be added but not for web applications. I have added the Java.persistance jar files into lib folder. Here is the project structure..

Here is the Hibernate code.

I would like to check that my field names are uppercase only for fields that meet my preferred definition of "constant", as stated in Google's Java Coding Guidelines.

Thus:

I searched a lot concerning this problem but I didnt find any good solution for me

My database name: employee_management_system

My Application.properties:

Hello im trying to work on a project first of all it was all smooth when i worked on a single model as you see below "Student"

StudentController