如何通过Web服务传输java.util.Map？

   <groupId>com.fasterxml.jackson.core</groupId>
   <artifactId>jackson-databind</artifactId>
   <version>2.13.0</version>
</dependency>

import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.HashMap;
import java.util.Map;

public class WebService {
    public static void main(String[] args) {
        ObjectMapper objectMapper = new ObjectMapper();
        Map<String, String> map = new HashMap<>();
        map.put("key1", "value1");
        map.put("key2", "value2");

        try {
            String jsonString = objectMapper.writeValueAsString(map);
            System.out.println("JSON String: " + jsonString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class Receiver {
    public static void main(String[] args) {
        ObjectMapper objectMapper = new ObjectMapper();
        String jsonString = "{\"key1\":\"value1\",\"key2\":\"value2\"}";

        try {
            Map<String, String> map = objectMapper.readValue(jsonString, HashMap.class);
            System.out.println("Map: " + map);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}