java Spring - 如何从 BindingResult 中删除“FieldError”？
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Spring - How to remove a `FieldError` from a BindingResult?
提问by th3an0maly
I have a BindingResult resultthat has a FieldErrorregistered for the field date. How can I remove this error?
我有一个BindingResult result已经FieldError注册的领域date。我怎样才能消除这个错误？
Assume the error was added as result.rejectValue("date", "my_code", "my_message") ;
假设错误被添加为 result.rejectValue("date", "my_code", "my_message") ;
Thanks in advance
提前致谢
采纳答案by GreyBeardedGeek
Well, first of all, BindingResult is an interface, not a concrete class, and the interface doesn't specify any way to remove an error.
嗯，首先，BindingResult 是一个接口，而不是一个具体的类，并且该接口没有指定任何消除错误的方法。
Depending on which implementation of the interface you are dealing with, there may be a method (beyond what's specified in the BindingResult interface) to do this, but it seems unlikely.
根据您正在处理的接口的实现，可能有一种方法（超出 BindingResult 接口中指定的内容）来执行此操作，但似乎不太可能。
The only thing that I can think of is to create a new BindingResult instance, then loop through the errors and re-create all but the one that you want to ignore in the new one.
我唯一能想到的就是创建一个新的 BindingResult 实例，然后遍历错误并重新创建所有错误，但要在新的错误中忽略的除外。
回答by Ammar Akouri
Here is an example that implements @GreyBeardedGuy Answer, Suppose you want to remove the errorlinked to a fieldcalled specialFieldin the classMyModelwith a modelAttributename as myModelfrom BindingResultresult:
下面是一个例子，它实现@GreyBeardedGuy答案，假设你要删除的error链接到一个field名为specialField在classMyModel同一个modelAttribute名称myModel来自BindingResultresult：
List<FieldError> errorsToKeep = result.getFieldErrors().stream()
.filter(fer -> !fer.getField().equals("specialField "))
.collect(Collectors.toList());
result = new BeanPropertyBindingResult(vacancyDTO, "vacancyDTO");
for (FieldError fieldError : errorsToKeep) {
result.addError(fieldError);
}
回答by John Vint
The important question is, how did it get there in the first place? I assume dateis a java.util.Date field and the binding failed because of a formatting issue?
重要的问题是，它最初是如何到达那里的？我假设date是一个 java.util.Date 字段并且由于格式问题绑定失败？
For instance you put in 01/01/1970and it expected 1970-01-01or something similar? The reason here is because Spring MVC has a default date binder. It needs to take a string representation of a date and turn it into a java.util.Date and failed because it doesnt match the appropriate format.
例如，您输入01/01/1970并期望它1970-01-01或类似的东西？这里的原因是因为 Spring MVC 有一个默认的日期绑定器。它需要采用日期的字符串表示形式并将其转换为 java.util.Date 并失败，因为它与适当的格式不匹配。
Take a look at @InitBinderand how to override the string-to-dateconversion to accept different formats.
看看@InitBinder以及如何覆盖字符串到日期的转换以接受不同的格式。
