I am using JavaMailSender with Spring Boot. I have a mail template, which has title and content. The content has /n or /t characters. But this does not effect on template. Mails are being received like those characters are not even exist. How can I apply these characters to the template?

Im new to programming so keep that in mind. Im working with Spring Boot and API. I dont know how to finish this part: Have updateInvoice (that works) and it should write down seller and buyer info but anytime I try to test it via Postman the input with invoice update is correct but seller and buyer info is only null. Can someone help me finish this code?

I am working on a basic spring boot application. I am integration testing my create and read functionality and am struggling with the isEqualTo method. It is failing because the objects are two different instances of class Fruit. However, they are identical in all values except memory address. This is because I use “new” in my RowMapper. How can I avoid using new with the RowMapper class?

I’m working on a springboot API, and was curious what the standard naming convention is for nested objects…

so which is better approach in Java 17 springboot 3 for checking Null condition

I have an async Listener that reads data from a database, parses a file and calls an external service.

if (filterParamModel == null || pageSize == 1) { pageModel.setTotalRecords(-1); } else { CriteriaQuery<Long> countQuery = cb.createQuery(Long.class); Root<AlertTbl> countRoot = countQuery.from(AlertTbl.class); countQuery.select(cb.count(countRoot)); countQuery.where(cb.and(predicateArr)); Long count = entityManager.createQuery(countQuery).getSingleResult(); pageModel.setTotalRecords(count.intValue()); } return pageModel; Someone told me to use StringBuilder but there are a lot of methods like this so I can’t do that. I just migrated to […]

if (filterParamModel == null || pageSize == 1) { pageModel.setTotalRecords(-1); } else { CriteriaQuery<Long> countQuery = cb.createQuery(Long.class); Root<AlertTbl> countRoot = countQuery.from(AlertTbl.class); countQuery.select(cb.count(countRoot)); countQuery.where(cb.and(predicateArr)); Long count = entityManager.createQuery(countQuery).getSingleResult(); pageModel.setTotalRecords(count.intValue()); } return pageModel; Someone told me to use StringBuilder but there are a lot of methods like this so I can’t do that. I just migrated to […]

I’m developing an API for college courses and I want the requests to be able to handle multiple query parameters that refine the search in different ways. Example with 2 parameters:

In my core controller method, I’m sending a ResponseEntity with status 500