spring RestController

@RestController
@RequestMapping("/index")
public class IndexController {
    @GetMapping
    public String findAllBooks(){
        return "BookList";
    }

    @PostMapping
    public String findAllBooks1(){
        return "BookList1";
    }

    @GetMapping("/{bid}")
    public String findBook(@PathVariable String bid){
        return "Book"+bid;
    }

    @GetMapping("/ebook")
    public String findAllEbooks(){
        return "EbookList";
    }

    @GetMapping({"/ebook1","/ebook2"})
    public String findAllEbook1AndEbook2(){
        return "findAllEbook1AndEbook2";
    }

    @GetMapping("/ebook/{eid}")
    public String findEbook(@PathVariable String eid){
        return "findEbook"+eid;
    }

    @DeleteMapping
    public String deleteBook(){
        return "deleteBook";
    }

    @PutMapping
    public String addBook(){
        return "addBook";
    }
}