嗨,我有由哈希和列表组成的嵌套对象.我正在尝试使用gson,但是如果哈希图中的值是哈希图而不是简单字符串,则似乎无法很好地工作.

Map questionDetails = new HashMap<>();
questionDetails.put("label", descriptionNode.getText());
questionDetails.put("validations", new HashMap<>().put("compulsary", 1));
System.out.println(new Gson().toJson(questionDetails));

如果打印

{"label":"I am working on something"}

而

Map questionDetails = new HashMap<>();
questionDetails.put("label", descriptionNode.getText());
questionDetails.put("validations", "something");
System.out.println(new Gson().toJson(questionDetails));

似乎运作良好.

解决方法:

它不起作用的原因是您输入了以下内容：new HashMap<>().put(“ compulsary”,1)而不是hasmap本身.

questionDetails.put("validations", new HashMap<>().put("compulsary", 1));

做：

Map questionDetails = new HashMap<>();
questionDetails.put("label", descriptionNode.getText());
Map validations = new HashMap<>();
validations.put("compulsary", 1)
questionDetails.put("validations", validations);
System.out.println(new Gson().toJson(questionDetails));

{“validations”:{“compulsary”:1},”label”:”I am working on something”}