exception handling for filter in spring

Question

I am handling exceptions in spring using @ExceptionHandler. Any exception thrown by controller is caught using method annotated with @ExceptionHandler and action is taken ac

Answer 1

I built my application with rest api, so I resolved this problem by catching it in the filter that may throw an exception and then writing something back. Remember that filterChain.doFilter(request, response); must be included.

@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
    try {
        // something may throw an exception
        filterChain.doFilter(request, response);
    } catch (Exception e) {
        // ResponseWrapper is a customized class
        ResponseWrapper responseWrapper = new ResponseWrapper().fail().msg(e.getMessage());
        response.setHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_UTF8_VALUE);
        response.getWriter().write(JSON.toJSONString(responseWrapper));
    }
}