Java Spring中的重载控制器方法
问题内容：
我有一个控制器，需要使用不同的URL参数来表现不同。像这样：
@RequestMapping(method = RequestMethod.GET)
public A getA(@RequestParam int id, @RequestParam String query) {
...
}
@RequestMapping(method = RequestMethod.GET)
public A getA(@RequestParam int id) {
...
}
但这似乎不起作用，我得到以下异常：
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
应用程序是否可以根据URL参数选择方法？
问题答案：
在映射中指示应存在哪些参数
@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) {
...
}
