Java Spring中的重载控制器方法 [英] Overload Controller Method in Java Spring

问题描述

我有一个控制器需要使用不同的URL参数表现不同。这样的事情：

I have a controller that needs to behave differently with different URL parameters. Something like this:

@RequestMapping(method = RequestMethod.GET)
public A getA(@RequestParam int id, @RequestParam String query) {
    ...
}


@RequestMapping(method = RequestMethod.GET)
public A getA(@RequestParam int id) {
    ...
}

但这似乎不合适为了工作，我得到以下异常：

But this doesn't seem to work, I get the following exception:

org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping found. Cannot map '[controller name]' bean method 

有没有办法让应用程序选择依赖方法在URL params？

Is there a way that the application chooses the method depending on the URL params?

推荐答案

在映射中指出哪些参数应该存在

Indicate in the mapping which params should be present

@RequestMapping(method = RequestMethod.GET, params = {"id", "query"})
public A getA(@RequestParam int id, @RequestParam String query) {
    ...
}


@RequestMapping(method = RequestMethod.GET, params = {"id"})
public A getA(@RequestParam int id) {
    ...
}

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