Java json字符串到java类

Question

如何将此json字符串转换为java类对象？ json String存储在数据库中，我需要转换为类对象。

    {
    "key1": {
      "key11": "value11",
      "key12": "value12",
      "key13": "value13"
            },
    "key2": {
      "key21": "value21",
      "key22": "value22",
      "key23": "value23"
           },
    "key3": "value3",
    "key4": [{
          "key1": {
            "key11": "value11",
            "key12": "value12",
            "key13": "value13"
                  },
          "key2": {
          "key21": "value21",
          "key22": "value22",
          "key23": "value23"
            }
           }]
      }

Answer 1

您可以使用org.json资料库

 JSONObject jsonObj = new JSONObject(string);

在您的情况下，从数据库中检索的字符串是

String string =  {
    "key1": {
      "key11": "value11",
      "key12": "value12",
      "key13": "value13"
            },
    "key2": {
      "key21": "value21",
      "key22": "value22",
      "key23": "value23"
           },
    "key3": "value3",
    "key4": [{
          "key1": {
            "key11": "value11",
            "key12": "value12",
            "key13": "value13"
                  },
          "key2": {
          "key21": "value21",
          "key22": "value22",
          "key23": "value23"
            }
           }]
      }