Spring Boot Rest API receiving JSON

[Greg Abel]

I created a restful endpoint with spring boot similar to the code below.  It does a mapping to my java object MyObect and it it works fine.  I was wondering if there is a way to get the JSON that was actually received by the controller?  If I wanted to the raw JSON and just print it or save it to a JSON field, is that possible?  Thanks in advance for the help.  

@PostMapping("/myservice/storefeed")
    public ResponseEntity<Object> storeMyFeed(@RequestBody MyObject myObject)

[Claude Moore]

Yes, it's possible but quite convolute.
First, you need to add a Custom Filter:

@Component
public class CustomFilter  extends GenericFilterBean {
    
	@Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)    throws IOException, ServletException {
        HttpServletRequest currentRequest = (HttpServletRequest) servletRequest;
        ContentCachingRequestWrapper wrappedRequest = new ContentCachingRequestWrapper(currentRequest);
        chain.doFilter(wrappedRequest, servletResponse);
    }

}

After that, you just need to tell Spring to inject an HttpServletRequest alog with MyObject:

@PostMapping(value= "/myservice/storefeed")
    public String storeMyFeed(@RequestBody MyObject obj, HttpServletRequest request) {
		try {
		    ContentCachingRequestWrapper requestWrapper = (ContentCachingRequestWrapper) request;
	        String jSonBody = new String(requestWrapper.getContentAsByteArray());
	        System.out.println(obj);
	        System.out.println(jSonBody);
			return "OK";
		}
		catch(Exception e) {
			return "Something wrong :"+e.getMessage();
		}
}

By the way: why just not convert your object to json via Jackson ?