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Explanation

Logging helps monitor API requests, responses, execution time, and errors.

Code:

private static final Logger log = LoggerFactory.getLogger(StudentController.class);

Explanation

Log incoming requests inside controller methods.

Code:

log.info("Fetching student with id {}", id);

Explanation

Log successful responses before returning data.

Code:

log.info("Student retrieved successfully");

Explanation

Use HandlerInterceptor to log every incoming request.

Code:

public boolean preHandle(HttpServletRequest request,HttpServletResponse response,Object handler){
    System.out.println(request.getMethod()+" "+request.getRequestURI());
    return true;
}

Explanation

Use filters to log request and response processing time.

Code:

long start=System.currentTimeMillis();
filterChain.doFilter(request,response);
System.out.println(System.currentTimeMillis()-start);