java - 如何从字符串或 json 对象中搜索并打印特定内容

Question

这个问题已经有答案了:

Get Key and values from JSONObject (3 个回答)

已关闭 4 年前。

我想搜索并打印我从 REST API 响应存储的 jsonobject 或字符串的值。并且我想打印详细信息的值 "Application with 'Temporarily in New Zealand' status is not allowed"

    String responseString = EntityUtils.toString(response.getEntity(), "UTF-8");
    JSONObject responseJson = new JSONObject(responseString);
    System.out.println("The response from API is:"+ responseJson);

输出和响应

    {"errors":[{"code":"PredicateValidator","detail":"Application with 'Temporarily in New Zealand' status is not allowed","source":{"source":"/PersonApplicant[0]/ResidencyStatus"},"title":"Application with 'Temporarily in New Zealand' status is not allowed"}]}'

Answer 1

您可以使用JSONObject类来访问 JSON 对象中的值。

JSONObject responseJson = new JSONObject(responseString);
JSONArray jsonArray=responseJson.getJSONArray("errors");
for(int i=0; i<jsonArray.lenght();i++){
  JSONObject jso = jsonArray.getJSONObject(i);
  System.out.println(jso.getString("detail"));
}