将Map<String、BigDecimal>值序列化为Shape.STRING

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.Map;

public class Main {
    public static void main(String[] args) {
        Map<String, BigDecimal> map = new HashMap<>();
        map.put("key1", new BigDecimal("10.5"));
        map.put("key2", new BigDecimal("20.3"));

        ObjectMapper objectMapper = new ObjectMapper();
        try {
            String jsonString = objectMapper.writeValueAsString(map);
            System.out.println(jsonString);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
    }
}

{"key1":"10.5","key2":"20.3"}