@PostMapping 을 했고, 여기서는 @GetMapping 을 할것. // 전체 목록 보여주기 @GetMapping(value = "/books", produces = "application/json") @ApiResponse(responseCode = "200", description = "List of books") @Operation(summary="List book API") public List books(){ List books=new ArrayList(); for(Book book : bookService.findAll()){ books.add(new BookViewDTO(book.getId(), book.getSubje..
