[Web] object from request parameters

Error Message

ERROR - [Ljava.lang.String; cannot be cast to java.lang.String
java.lang.ClassCastException: [Ljava.lang.String; cannot be cast to java.lang.String


Solution

注意使用的物件 type，Map<String, String[]> or Map<String, String>。


Map<String, String[]> requestParameters = request.getParameterMap();
Map<String, String> parameters = new Map<String, String>();
for(String key: requestParameters.keySet())  {
    parameters.put(key, requestParameters.get(key)[0]);
}