使用JSONObject对象将HashMap转换成String

package com.test.springboot.utils;

import com.alibaba.fastjson.JSONObject;
import java.util.HashMap;
import java.util.Map;

public class Test {
    public static void main(String[] args) {
        Map<String, Object> param = new HashMap<>(16);
        param.put("account", "12345678");
        param.put("appKey", "ios");
        String jsonStr = JSONObject.toJSONString(param);
        System.out.println(jsonStr);
    }
}