1. Because a HashMap <String, Object> For a map of type, I get the data in the object. Because it is a map, I need to convert it into JSON to get the value, but I report an error in the process of conversion
2. Solutions
1. Because a HashMap <String, Object> For a map of type, I get the data in the object. Because it is a map, I need to convert it into JSON to get the value, but I report an error in the process of conversion
2. Solutions