如何在Spring中使用javax.validation.constraints验证List内元素的长度 [英] How to validate the length of elements inside List using javax.validation.constraints in Spring

问题描述

如何在Spring中使用javax.validation.constraints验证List内元素的长度.现在，@ Size正在验证列表大小，而不是内部元素.

How to validate the length of elements inside List using javax.validation.constraints in Spring. Right now @Size is validating on the list size, not on the inside elements.

class RequestInputParamaters {

        @NotNull
        @NotEmpty
        @Size(min = 1, max=4)
        List documentIdentifier_value

    }

推荐答案

尝试:

List<@NotNull @NotEmpty @Size(min = 1, max=4) String> documentIdentifier_value;

如果使用hibernate-validator，则需要版本6+.

If using hibernate-validator, you'll need version 6+.

旧版解决方案:

@Valid List<StringWrapper> documentIdentifier_value;

其中StringWrapper定义为:

public class StringWrapper {
    @NotNull @NotEmpty @Size(min = 1, max=4)
    private String wrapped;
    ...
}

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