String转Map<String,String>

import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;

import java.util.Map;

public class Test {

    public static void main(String[] args) throws IOException {

        String str = "{\"a\":\"b\",\"c\":\"d\"}";

        ObjectMapper objectMapper = new ObjectMapper();

        Map map = objectMapper.readValue(str, Map.class);

        System.out.println(map);

    }

}