【反射】動態執行某類別方法

@PostMapping(value = "/test/getApi/{className}",consumes = MediaType.ALL_VALUE)
    public ResponseEntity<?> getApi(
            @PathVariable String className,
            @RequestBody HashMap<String ,Object> param
    ) throws Exception{

        HttpStatus status = HttpStatus.OK;
        Object res = null;
        HashMap classMap = new HashMap<String,String>();
        // 對應完整class
        classMap.put("TencentStreamingAPI","com.test.api.TencentStreamingAPI");
        
        String fullClassName = (String)classMap.get(className);
        String func = "";

        try {
            if(fullClassName == null) throw new Exception("no className mapping fullClassName");
            if((String)param.get("func") != null){
                func = (String)param.get("func");
            }else{
                throw new Exception("no func name");
            }

            Class c = Class.forName(fullClassName);
            Object ts = c.newInstance();

            switch (className){
                case "TencentStreamingAPI":
                    ts = tencentStreamingAPI;
                    c = ts.getClass();
                    break;
                case "TencentIMAPI":
                    ts = tencentIMAPI;
                    c = ts.getClass();
                    break;
            }



            Method[] methods = c.getMethods();
            for (Method method : methods) {
                if (method.getName().equals(func)) {

                    if (method.getParameters().length == 0) {
                        Method m = c.getMethod(func, null);
                        res = m.invoke(ts, null);

                    } else {
                        ArrayList<Class<?>> parameterTypesList = new ArrayList<Class<?>>();
                        ArrayList<Object> argsList = new ArrayList<Object>();

                        for(Parameter parameter : method.getParameters() ){
                            String prarameterName = parameter.getName();
                            Class clazz = parameter.getType();
                            Object arg = param.get(prarameterName);
                            if(arg == null) throw new Exception("no such prarameter: "+ prarameterName);
                            parameterTypesList.add(clazz);
                            argsList.add(arg);
                        }
//                        Method m = c.getMethod(func, String.class);
                        Method m = c.getMethod(func, parameterTypesList.toArray(new Class[parameterTypesList.size()]));
                        res = m.invoke(ts, argsList.toArray(new Object[argsList.size()]));
                    }
                    break;
                }

            }

        } catch (ClassNotFoundException e) {
            logger.error(e.getMessage());
            throw new Exception("no such class: " + className);
        } catch (NoSuchMethodException e) {
            logger.error(e.getMessage());
            throw new Exception("no such metod:" + func);
        } catch (IllegalArgumentException e) {
            logger.error(e.getMessage());
            throw new Exception("illegal argument :" + func);
        } catch (Exception e) {
            
            //取得目前執行方法名稱
            String methodName = "[noGetMethodName]";
            Method method = this.getClass().getEnclosingMethod();
            if(method != null){
                methodName = method.getName();
            }else{
                StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
                for (StackTraceElement stackTraceElement : stackTrace) {
                    methodName = stackTraceElement.getMethodName();
                    if (!methodName.equals("getStackTrace") &&
                            !methodName.equals("getMethodName") &&
                            !methodName.equals("main")) {
                        break;
                    }
                }
            }


            logger.error(this.getClass().toString()+" -> "+
                    methodName + ": " + e.getMessage());
            status = HttpStatus.FORBIDDEN;
        }

        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        String resultStr = "{}";

        if(res instanceof JSONObject){
            resultStr = ((JSONObject) res).toString();
        }else if(res instanceof JSONArray){
            resultStr = ((JSONArray) res).toString();
        }else if(res instanceof String){
            resultStr = (String) res;
        }
//        logger.debug("func name is {}",func);
//        logger.debug("func res type is {}",res.getClass().getName());
        return new ResponseEntity<>(resultStr, headers, status);
    }

public class TencentStreamingAPI {
	public JSONObject describeStreamPlayInfoList(String streamId,String starttime, String endtime){
 	.....
 	}
}

// 呼叫
http://localhost:8080/api/test/getApi/TencentStreamingAPI

/** json 參數
func: 執行方法名稱
其他帶入同名參數
*/
{
    "func": "describeStreamPlayInfoList", 
    "streamId": "AABBCCDD",
    "starttime": "2023-03-29 13:18:00",
    "endtime": "2023-03-29 13:18:00"
}