Failed to convert value of type ‘java.lang.String‘ to required type ‘java.util.List‘；

Failed to convert value of type ‘java.lang.String’ to required type ‘java.util.List’; nested exception is java.lang.IllegalStateException: Cannot convert value of type ‘java.lang.String’ to required type ‘com.lanxi.hm.model.DrugParam’: no matching editors or conversion strategy found

today at 14:17:30   2022-12-08 14:17:30.837, [http-nio-7065-exec-2], ERROR, com.lanxi.hm.advice.DetailedControllerAdvice, 39, [detailedExceptionHandler] url:http://hm/hm/medicineBox/setAlarm. 
today at 14:17:30   org.springframework.web.method.annotation.MethodArgumentConversionNotSupportedException: Failed to convert value of type 'java.lang.String' to required type 'java.util.List'; nested exception is java.lang.IllegalStateException: Cannot convert value of type 'java.lang.String' to required type 'com.lanxi.hm.model.DrugParam': no matching editors or conversion strategy found
today at 14:17:30	at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:129)
today at 14:17:30	at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121)
today at 14:17:30	at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167)
today at 14:17:30	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)
today at 14:17:30	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)
today at 14:17:30	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)
today at 14:17:30	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)
today at 14:17:30	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
today at 14:17:30	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
today at 14:17:30	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
today at 14:17:30	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
today at 14:17:30	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
today at 14:17:30	at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
today at 14:17:30	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
today at 14:17:30	at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
...
...

我现在是写接口，对接第三方接口，第三方接口文档如下

此时，我写的接口如下：

看起来并没有什么问题，但是却报上文展示的错误

无法将类型“java.lang.String”的值转换为所需类型“java.util.List”；
嵌套异常为java.lang.IllegalStateException:
无法将“java.lang.String”类型的值转换为所需类型“com.lanxi.hm.model.DrugParam”：
找不到匹配的编辑器或转换策略

既然它传参传进来的是String，那我为什么非要把他转换成List<DrugsParam>呢
于是，我将接口参数类型直接就写成了String，修改后的接口如下：

@ApiOperation(value = "编辑闹钟接口")
@PostMapping("/setAlarm")
public Rs<String> setAlarm(
	@ApiParam(value = "token,通过‘获取token’接口获取") @RequestParam(value = "token", required = true) String token,
    @ApiParam(value = "用户ID") @RequestParam(value = "userId", required = true) String userId,
    @ApiParam(value = "设备编码") @RequestParam(value = "deviceSn", required = true) String deviceSn,
    @ApiParam(value = "闹钟ID") @RequestParam(value = "alarmId", required = true) String alarmId,
    @ApiParam(value = "闹钟时间，例08:05") @RequestParam(value = "alarmTime", required = true) String alarmTime,
    @ApiParam(value = "闹钟状态，1有效，2无效") @RequestParam(value = "status", required = true) String status,
    @ApiParam(value = "药品信息(数组)，例如：[{ \"drug_name\":\"drug 1\", \"drug_amount\":\"1\" }, {\"drug_name\":\"drug 2\",\"drug_amount\":\"2\"}]") @RequestParam(value = "drugs", required = false) String drugs) {
    return Rs.success(medicineBoxService.setAlarm(token, userId, deviceSn, alarmId, alarmTime, status, drugs));
    }