BindingResult用于验证错误,业务错误怎么办？

Question

我知道BindingResult用于与表单相关的验证错误.但是,如果出现业务错误,例如:

public String bulkUpdate(@ModelAttribute form, BindingResult r) {
//do validation, extract selected issues to be bulk updated, etc.
//any form related, binding errors to be put in r

//this part
List<String> results = service.bulkUpdate(issues, newValues);

//where is it appropriate to put the results?
//from experience we just create a request attribute and put it there
request.setAttribute("bulkUpdateErrors", StringUtils.join(results, "<br>"))

//is there an similar generic structure like Errors?
}

在jsp中:

<div id='info'> 
    <c:if test="${not empty bulkUpdateErrors}">
        <spring:message code="bulk.update.warning" /> ${bulkUpdateErrors}
    </c:if>
</div>

是否有类似的通用结构来解决业务错误？

Answer 1

您可以按照建议使用分隔对象,也可以添加业务错误Errors/BindingResult.就个人而言,我通常会在BindingResult中添加业务错误,因为以后更容易在JSP/View中显示它们.我不知道为此目的是否有任何通用结构.

使用r.rejectValue("property", "error.object");,就足够了.或者如果您愿意,可以注册全局错误r.reject("error.object");