Read Request parameter String from URL in Spring/HttpServlet

Read entire query string(request parameter) in Spring Boot/HttpServlet

In Spring Boot and other Java web frameworks, we capture the request parameters (aka query parameters) and map them to individual variable or a Map<String,String>. 

But, if you want to read the entire query parameter in its raw form ( eg: to read name=Ganesh&country=Nepal&ageLt=30&page=1 from request: http://localhost:8080/search?name=Ganesh&country=Nepal&ageLt=30&page=1), you can utilize HttpServletRequest.getQueryString()

Example:

@GetMapping("/test1")
void endpoint1(HttpServletRequest req) {
    var qs = req.getQueryString()  //returns the entire string
    qs.split("&") //split to get the individual parameters
}

Note: Spring Boot automatically resolves the HttpServletRequest object ( its the real holder of request object in Http Servlet environment)