java - 如何对 Put httpmethods 进行验证？

Question

我被困在对我的放置/更新服务进行验证

 public Book updateBook (Book book){
        Book existingbook = repository.findById(book.getId()).orElse(null);
        existingbook.setQuantity(book.getQuantity());
        existingbook.setName(book.getName());
        existingbook.setPrice(book.getPrice());
        return repository.save(existingbook);
    }

当用户只能设置小于 100 的数量时如何进行验证？

标签： javaspringrestjpa

Answer 1

You should use validation from javax.validation package.

• Java Bean Validation Basics
• Validating Form Input
• Spring MVC Custom Validation