java - 未在 Spring Controller 中执行验证

Question

我想在类中使用注释。我用javax.validation.constrants.*用于注释。

public final class EmailCredential implements Serializable {

    private static final long serialVersionUID = -1246534146345274432L;

    @NotBlank(message = "Sender must not be empty.")
    @Email
    private final String sender;

    @NotBlank(message = "Subject must not be empty.")
    private final String subject;

/// getters setters

}

它们都没有按预期工作。这意味着当调用下面的 API 时，如果注释字段无效，注释应该抛出错误。看起来没有注释来检查字段。在普通类中如何正确使用注释？

Controller :

@PostMapping(value = "/email/credentials", consumes = MediaType.APPLICATION_JSON_VALUE)
    public Map<String, Object> emailCredentials(@RequestBody EmailCredential emailCredential) {
        return emailService.setCredentials(emailCredential);
    }

Answer 1

在您的情况下，必须指定要触发的验证。
因此添加 @Valid您要验证的参数上的注释，例如:

import javax.validation.Valid;
// ...
@PostMapping(value = "/email/credentials", consumes = MediaType.APPLICATION_JSON_VALUE)
    public Map<String, Object> emailCredentials(@RequestBody @Valid EmailCredential emailCredential) {
        return emailService.setCredentials(emailCredential);
    }