Java 所需的字符串参数不存在 Spring MVC
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Required String parameter is not present Spring MVC
提问by kosas
I want to access two different pages in my browser using:
我想使用以下方法在浏览器中访问两个不同的页面：
http://localhost:8080/name?views
and
和
http://localhost:8080/name?uviews
But I'm getting error Required String parameter 'uviews' is not present when I use first url and I get Required String parameter 'views' is not present when I use second one.
但是当我使用第一个 url 时，我收到错误 Required String parameter 'uviews' is not present，当我使用第二个 url 时，我得到 Required String parameter 'views' is not present。
here is my Response body
这是我的响应正文
@ResponseBody
public Object getViewInJson(@RequestParam("views") String views ,@RequestParam("uviews") String uviews) throws IOException{
loader = new AnalyticsLoader();
return loader.AnalyticsLoader(views,uviews);
}
How can access both views and uviews?
如何访问视图和uviews？
采纳答案by Prasanna Kumar H A
Add required=falseattribute to @RequestParam..Change to
将required=false属性添加到@RequestParam..Change to
@RequestParam(required=false,name="views") String view,..
回答by ChiefTwoPencils
Add required=falseto the @RequestParamnotation for both. Or you could decide to explicitly use one, set it to required=falseand set the other as the defaultValue.
添加required=false到@RequestParam符号两种。或者您可以决定明确使用一个，将其required=false设置为并将另一个设置为defaultValue.
See the documentationfor further information.
有关更多信息，请参阅文档。
回答by Lyn
please check your spring version, there is a bug in 3.2.3. https://jira.spring.io/browse/SPR-10592
请检查您的 spring 版本，3.2.3 中有一个错误。 https://jira.spring.io/browse/SPR-10592
回答by Patel Romil
I was using Postmanfor API hit, Adding required=falseand defalutValuemight be helpful, but required=falseresults in NULL Exception. Then I have Removed the Headers (can Authorization header)in Postman and its works.
我正在使用PostmanAPI 命中，添加required=false并且defalutValue可能会有所帮助，但required=false结果是NULL Exception. 然后我Removed the Headers (can Authorization header)在邮递员及其作品中。
