Gson获取json串中的key-value

1、依赖包

    <dependency>
      <groupId>com.google.code.gson</groupId>
      <artifactId>gson</artifactId>
      <version>2.1</version>
    </dependency>

　　

2、示例代码

String json = "{"resultCode":"SUCCESS","resultDesc":"SUCCESS","userProfile":{"userId":"901228507","registTime":"20180622161442","accounts":[{"accountName":"123566965","accoutType":"MOBILE","bindTime":null,"verified":false,"accountExtInfo":null}],"avatar":null,"nickName":null,"userRole":null,"usernum":null,"extInfo":null}}";

        JsonParser parser = new JsonParser();

        // 2.获得 根节点元素
        JsonElement element = parser.parse(json);

        // 3.根据 文档判断根节点属于 什么类型的 Gson节点对象
        JsonObject root = element.getAsJsonObject();

        String resultCode = root.get("resultCode").getAsString();

        System.out.println(resultCode);

        // 4. 取得 节点 下 的某个节点的 value
        JsonObject userProfile = root.getAsJsonObject("userProfile");

        System.out.println(userProfile.get("userId").getAsString());