Question

我有一个Spring控制器，它可能在某个时候抛出运行时异常：


{% extends 'nowandthen/base.html' %}
{% load staticfiles %}
{% block title_block %}
Add self
{% endblock %}
{% block body_block %}
<h1>Add a Comment</h1>
<div>
<form id="comment_form" method="post" action="{% url 'nowandthen:add_comment' comment_id%}" enctype="multipart/form-data" >
{% csrf_token %}
{{ form.as_p }}
<input type="submit" name="submit" value="Add Comment" />
</form>
</div>
{% endblock %}

当我请求该URI时，JSON不包括异常名称（“运行时异常”）：

https://login.microsoftonline.com/<tenantId>/oauth2/token

是否可以将其包含在返回的JSON中？谢谢！

Answer 1

我认为您可以通过扩展DefaultErrorAttributes并提供要显示在返回的JSON中的属性的自定义列表来实现。例如，以下内容提供了针对字段错误的自定义错误响应：

import org.springframework.boot.web.servlet.error.DefaultErrorAttributes;
import org.springframework.context.MessageSource;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.context.request.WebRequest;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Map;


public class ResolvedErrorAttributes extends DefaultErrorAttributes {

    private MessageSource messageSource;

    public ResolvedErrorAttributes(MessageSource messageSource) {
        this.messageSource = messageSource;
    }

    @Override
    public Map<String, Object> getErrorAttributes(WebRequest webRequest, boolean includeStackTrace) {
        Map<String, Object> errorAttributes = super.getErrorAttributes(webRequest, includeStackTrace);
        resolveBindingErrors(errorAttributes);
        return errorAttributes;
    }

    private void resolveBindingErrors(Map<String, Object> errorAttributes) {
        List<ObjectError> errors = (List<ObjectError>) errorAttributes.get("errors");
        if (errors == null) {
            return;
        }

        List<String> errorMessages = new ArrayList<>();
        for (ObjectError error : errors) {
            String resolved = messageSource.getMessage(error,  Locale.US);
            if (error instanceof FieldError) {
                FieldError fieldError = (FieldError) error;
                errorMessages.add(fieldError.getField() + " " + resolved + " but value was " + fieldError.getRejectedValue());
            } else {
                errorMessages.add(resolved);
            }
        }
        errorAttributes.put("errors", errorMessages);
    }
}

在此tutorial中，您可以找到有关Spring Boot自定义错误响应的更多详细信息。

如何在Spring Boot的JSON响应中显示异常名称

1 个答案: