java.lang.IllegalArgumentException: No converter found for return value of type

Question

With this code

@RequestMapping(value = \"/bar/foo\", method = RequestMethod.GET)
    public ResponseEntity foo() {

        Foo model;
        ...         


        

Answer 1

In my case, I forgot to add library jackson-core.jar, I only added jackson-annotations.jar and jackson-databind.jar. When I added jackson-core.jar, it fixed the problem.