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#spring - Questions and answers

14 questions, 1 pages, 20 questions on this page

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6 points

Spring Boot 3 - How to solve 403 Forbidden status for POST request?

I have decided to upgrade my application to Spring Boot 3 attaching Spring Boot Security dependency. And now I am not able to do POST requests. REST API returns 403 Forbidden status. Any idea how to s...

1 answers

650

3 points

Spring Boot 2 - Caused by: java.lang.Exception: Socket bind failed: [13] [Permission denied]

Why on Windows my Spring Boot 2 application starts without any problems, and on Linux not? Java exception:

1 answers

635

3 points

Spring Boot 3 - How can I perform client API GET request with request body using RestTemplate?

I want to perform a GET request with body. How to do that or what library should I use? I am currently using Java 17, Spring Boot 3.0.1 and RestTemplate.

1 answers

1060

5 points

Spring Boot - best way to prevent sending overhead data in URL per each API request?

I am developing web service that provides API that intermediates in some operations with desired web service. Application concept: My web service, needs in each request the following path prefix: It m...

1 answers

366

5 points

Spring Boot 2 - Exception in thread "main" java.lang.UnsupportedClassVersionError: gallery/GalleryApplication has been compiled by a more recent version of the Java Runtime (class file version 55.0).

I have got issue with my Spring Boot 2 application. When I run my application using IntelliJ IDEA everything works fine. When I try to run it from command line application throws error. Anyone knows w...

1 answers

458

7 points

Spring Boot - Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured (mchange-commons-java-0.2.19.jar).

I am working with my Spring Boot Application. I have got some error:

1 answers

636

4 points

Spring Boot 2 - JdbcTemplate throws: java.sql.SQLException: Before start of result set

I have trouble uring JdbcTemplate query() function getting single result from ResultSet. This is exception I got: This is stack trace: SQL query I used: My java source code:

1 answers

758

4 points

JPA / Hibernate - returns duplicated rows

I have an issue: Hibernate returns duplicated rows in the list of entities. I use a native query with GROUP BY: Duplicated rows: Hibernate returns duplicated rows in the list of entities.

1 answers

411

9 points

Spring Boot - java.net.ConnectException: Connection refused: connect - APR enabled / Tomcat native libraries

What is the reason why my Spring Boot Application doesn't let to establish socket connection via Jsoup or java URL class when I have enabled APR / Tomcat native libraries? Exception message: When I us...

1 answers

499

5 points

Spring Boot 2.4 + Tomcat 9 is serving web page response content extremely slow for first API requests

After migration from Spring Framework + Tomcat 8 to Spring Boot 2.4 + Tomcat 9, I have noticed big extreme slowness in receiving web content. Initial JSP compilation takes a lot of time, first request...

1 answers

490

6 points

Spring + Hibernate + H2 - error - h2 Caused by: org.h2.jdbc.JdbcSQLException: Sequence "HIBERNATE_SEQUENCE" not found; SQL statement:

How to fix this error: This error occurs when I try to save new entity with repository: My entity: Repository:

1 answers

439

4 points

React + Spring Controller - CORS policy: No 'Access-Control-Allow-Origin' header is present

I write an app with React + Java (Spring Framework) and encountered problem with AJAX request to Spring Controller. Error from browser console: Access to fetch at 'http://localhost:8080/users/get-user...

1 answers

677

1 points

Spring - HTTP Status 415 - The server refused this request because the request entity is in a format not supported by the requested resource for the requested method.

I have created some controller that returns some result for indicated GET REST action: With jQuery AJAX GET method it works perfectly, but when I tried to open same url from browser I got following pr...

1 answers