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Spring @initBinder方法在控制器内部只能被调用一次

[英]Spring @initBinder method to be called only once inside a controller

原文 2015-11-28 10:27:26 2 1 java/ spring/ spring-mvc/ propertyeditor/ spring-mvc-initbinders

I have a class that annotated with @RestController and @ControllerAdvice that has my requests mapped methods ( @RequestMapping ). 我有一个用@RestController和@ControllerAdvice注释的类， @RestController具有我的请求映射的方法（ @RequestMapping ）。 Also in this class I added a method public void initBinder(WebDataBinder dataBinder) that is annotated with @InitBinder and responsible to register some custom editor. 同样在此类中，我添加了一个方法public void initBinder(WebDataBinder dataBinder) ，该方法使用@InitBinder注释，并负责注册一些自定义编辑器。 Specifically, it is a propertyEditor that convert String to Enum. 具体来说，是将String转换为Enum的propertyEditor 。

I noticed that on every call to @RequestMapping method in my controller, my initBinder method is being called. 我注意到在控制器中每次对@RequestMapping方法的调用时，都会调用我的initBinder方法。 Since in my opinion this editor registration should happen only once (initialization of controller), I want this to be set (called) only once. 由于我认为该编辑器注册仅应发生一次（控制器初始化），因此我希望仅将其设置（调用一次）。

Is there a way to do so? 有办法吗？

1 个解决方案

Alternatively, you can use implementation of BindingInitializer for registering your custom Editor. 另外，您可以使用BindingInitializer的实现来注册自定义编辑器。 You have to define a bean of class "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" in your app context file and set its "webBindingInitializer" property with your implementation of BindingInitializer. 您必须在应用上下文文件中定义一个类为“ org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter”的bean，并通过BindingInitializer的实现来设置其“ webBindingInitializer”属性。

In any case, scope of WebDataBinder is for a request. 无论如何，WebDataBinder的范围都是针对请求的。 Hope this helps. 希望这可以帮助。