page size in spring boot to get total size

Question

the default size of page is 20, I want to be able to get all elements from endpoint url.

to get 30 elements I set size like below :

http://localhost:8080/api/invoices?page=0&size=30

I don't want to change the default value of page size, I need to get total size from url but I didn't found how to set this. Thank you in advance

Answer 1

You can get size i.e. page size and page i.e. page number from URL using @RequestParam

@GetMapping
public List<Object> getInvoices(
    @RequestParam(required = false, value = "page", defaultValue = "0") Integer page,
    @RequestParam(required = false, value = "size", defaultValue = "20") Integer size) {
  return <return response from here>
}

Here, default page size is 20 and page number is 0.

From UI side you just have to send values like this way,

http://localhost:8080/api/invoices?page=0&size=30

Note: I marked both the parameters as not required so that you can also use below URL to get all the invoices.

http://localhost:8080/api/invoices

So, change this as per your requirement.

For more information refer https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/bind/annotation/RequestParam.html

Thanks