java - 如何获取请求参数名称本身

Question

我试图仅获取请求参数名称:

RequestMapping("/test?{state}",method=RequestMethod.GET)
public String test(@PathVariable state){
  // if I hit test?CA - state is coming as "est"

}

我应该如何获取状态？我不想将 url 设置为/test?state=CA

Answer 1

您正在混合路径变量和 URL 参数。

这应该有效:

GET /test/CA

->

@RequestMapping(value = "/test/{state}", method = GET)
public String test(@PathVariable String state){
    // ...
}

就像这样:

GET /test?CA

->

@RequestMapping(value = "/test", method = GET)
public String test(@RequestParam Map<String, String> parameters){
    if (parameters.containsKey("CA")) {
        // ...
    }
}

就像这样:

GET /test?state=CA

->

@RequestMapping(value = "/test", method = GET)
public String test(@RequestParam String state){
    // ...
}