使用Gson，你可以做以下事情:

Map<String, Object> retMap = new Gson().fromJson(
    jsonString, new TypeToken<HashMap<String, Object>>() {}.getType()
);

你也可以使用Jackson API:

    final String json = "....your json...";
    final ObjectMapper mapper = new ObjectMapper();
    final MapType type = mapper.getTypeFactory().constructMapType(
        Map.class, String.class, Object.class);
    final Map<String, Object> data = mapper.readValue(json, type);

如果你想要无库版本，这里是与regex的解决方案:

public static HashMap<String, String> jsonStringToMap(String inputJsonString) {
    final String regex = "(?:\\\"|\\')(?<key>[\\w\\d]+)(?:\\\"|\\')(?:\\:\\s*)(?:\\\"|\\')?(?<value>[\\w\\s-]*)(?:\\\"|\\')?";
    HashMap<String, String> map = new HashMap<>();
    final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
    final Matcher matcher = pattern.matcher(inputJsonString);

    while (matcher.find()) {
        for (int i = 1; i <= matcher.groupCount(); i++) {
            map.put(matcher.group("key"), matcher.group("value"));
        }
    }
    return map;
}

这是一个老问题，但可能仍然与某些人有关。 假设你有字符串HashMap hash和JsonObject JsonObject。

1)定义键列表。 例子:

ArrayList<String> keyArrayList = new ArrayList<>();  
keyArrayList.add("key0");   
keyArrayList.add("key1");  

2)创建foreach循环，从jsonObject中添加哈希:

for(String key : keyArrayList){  
    hash.put(key, jsonObject.getString(key));
}

这就是我的方法，希望它能回答问题。

使用JSON -simple，您可以将数据JSON转换为映射和映射到JSON。

try
{
    JSONObject obj11 = new JSONObject();
    obj11.put(1, "Kishan");
    obj11.put(2, "Radhesh");
    obj11.put(3, "Sonal");
    obj11.put(4, "Madhu");

    Map map = new  HashMap();

    obj11.toJSONString();

    map = obj11;

    System.out.println(map.get(1));


    JSONObject obj12 = new JSONObject();

    obj12 = (JSONObject) map;

    System.out.println(obj12.get(1));
}
catch(Exception e)
{
    System.err.println("EROR : 01 :"+e);
}

You can convert any JSON to map by using Jackson library as below: String json = "{\r\n\"name\" : \"abc\" ,\r\n\"email id \" : [\"abc@gmail.com\",\"def@gmail.com\",\"ghi@gmail.com\"]\r\n}"; ObjectMapper mapper = new ObjectMapper(); Map<String, Object> map = new HashMap<String, Object>(); // convert JSON string to Map map = mapper.readValue(json, new TypeReference<Map<String, Object>>() {}); System.out.println(map); Maven Dependencies for Jackson : <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.5.3</version> <scope>compile</scope> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.5.3</version> <scope>compile</scope> </dependency> Hope this will help. Happy coding :)