我有一個JSONObject這樣的結構："data": { "title": "Pool Party", "date": { "start": "2018-08-14T15:44:44.625Z", "end": "2018-08-14T18:44:44.625Z"}我想把它轉換成HashMap<String, String>對于“日期”字段下的“開始”和“結束”字段，有沒有一種方法可以以相同的方式構建地圖？我嘗試使用Gson如下方式轉換它：Type type = new TypeToken<Map<String, String>>(){}.getType();HashMap<String, String> params = Gson().fromJson(jsonString, type);但我收到了這個錯誤：com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was BEGIN_OBJECT可能是因為我的JSON字符串的結構有沒有辦法得到這樣的東西？謝謝您的幫助。
2 回答
智慧大石
TA貢獻1946條經驗 獲得超3個贊
您可以使用 ObjectMapper 來轉換它。
public void testJackson() throws IOException {
ObjectMapper mapper = new ObjectMapper();
String json = "{"data": {"title": "Pool Party","date": {"start": "2018-08-14T15:44:44.625Z", "end": "2018-08-14T18:44:44.625Z"}}}";
TypeReference<HashMap<String,Object>> typeRef
= new TypeReference<HashMap<String,Object>>() {};
HashMap<String,Object> o = mapper.readValue(from, typeRef);
System.out.println("Got " + o);
}
LEATH
TA貢獻1936條經驗 獲得超7個贊
嘗試這樣的事情：
public void testJackson() throws IOException {
ObjectMapper mapper = new ObjectMapper();
String json = "{\"data\": {\"title\": \"Pool Party\",\"date\": {\"start\":\"2018-08-14T15:44:44.625Z\", \"end\":\"2018-08-14T18:44:44.625Z\"}}}";
TypeReference<HashMap<String, Object>> typeRef = new TypeReference<HashMap<String, Object>>() {
};
HashMap<String, Object> o = mapper.readValue(from, typeRef);
System.out.println("Got " + o);
}
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