Springboot基于Restful风格

@PostMapping
    public String insert(@RequestBody Books books) {
        int id = books.getId();
        String price = books.getPrice();
        System.out.println(id + price);
        return "insert...";
    }

@DeleteMapping("/{id}")
    public String delete(@PathVariable Integer id) {
        System.out.println(id);
        return "delete... + id";
    }

@PutMapping()
    public String update(@RequestBody Books books) {
        System.out.println(books.getId() + books.getPrice());
        return "update。。。";
    }

@GetMapping
    public String findAll() {
        System.out.println("HELLO");
        return "Find。。";
    }
    @GetMapping("/{id}")
    public String findById(@PathVariable Integer id) {
        System.out.println(id);
        return "findById。。。";
    }