java-将JSONObject转换为HashMap<；字符串，字符串>；

我有一个

JSONObject

结构如下：

"data": {
   "title": "Pool Party",
   "date": {
       "start": "2018-08-14T15:44:44.625Z",
       "end": "2018-08-14T18:44:44.625Z"
}

Type type = new TypeToken<Map<String, String>>(){}.getType();
HashMap<String, String> params = Gson().fromJson(jsonString, type);

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);
}

我想把它转换成

HashMap<String, String>

但我有一个错误：

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was BEGIN_OBJECT

可能是因为我的

JSON

字符串的结构

有没有办法得到这样的东西？

---

谢谢您的帮助。

您可以使用ObjectMapper对其进行转换

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); 
}

public void testJackson（）引发IOException{
ObjectMapper mapper=新的ObjectMapper（）；
字符串json=“{”data:{”title:“Pool Party”，“date:{”start:“2018-08-14T15:44:44.625Z”，“end:“2018-08-14T18:44:44.625Z”}}；
类型引用类型引用
=新类型引用（）{}；
HashMap o=mapper.readValue（from，typeRef）；
System.out.println（“Got”+o）；
}

尝试以下方法：

"data": {
   "title": "Pool Party",
   "date": {
       "start": "2018-08-14T15:44:44.625Z",
       "end": "2018-08-14T18:44:44.625Z"
}

Type type = new TypeToken<Map<String, String>>(){}.getType();
HashMap<String, String> params = Gson().fromJson(jsonString, type);

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);
}

public void testJackson（）引发IOException{
ObjectMapper mapper=新的ObjectMapper（）；
字符串json=“{\'data\'：{\'title\'：\'Pool Party\'，\'date\'：{\'start\'：\'2018-08-14T15:44:44.625Z\'，\'end\'：\'2018-08-14T18:44:44.625Z\'}}”；
TypeReference typeRef=新的TypeReference（）{
};
HashMap o=mapper.readValue（from，typeRef）；
System.out.println（“Got”+o）；
}

这里的重复问题已经给出了一个解决方案，这不完全是我想要的@himly，但我需要将其转换为HashMap而不是HashMap