在 Java 中解析 JSON 字符串

发布于08月09日

我正在try 解析java中的JSON字符串，以便单独打印各个值.但在运行程序时，我收到以下错误-

Exception in thread "main" java.lang.RuntimeException: Stub!
       at org.json.JSONObject.<init>(JSONObject.java:7)
       at ShowActivity.main(ShowActivity.java:29)

我的班级看起来像-

import org.json.JSONException;
import org.json.JSONObject;

public class ShowActivity {
   private final static String  jString = "{" 
   + "    \"geodata\": [" 
   + "        {" 
   + "                \"id\": \"1\"," 
   + "                \"name\": \"Julie Sherman\","                  
   + "                \"gender\" : \"female\"," 
   + "                \"latitude\" : \"37.33774833333334\"," 
   + "                \"longitude\" : \"-121.88670166666667\""            
   + "                }" 
   + "        }," 
   + "        {" 
   + "                \"id\": \"2\"," 
   + "                \"name\": \"Johnny Depp\","          
   + "                \"gender\" : \"male\"," 
   + "                \"latitude\" : \"37.336453\"," 
   + "                \"longitude\" : \"-121.884985\""            
   + "                }" 
   + "        }" 
   + "    ]" 
   + "}"; 
   private static JSONObject jObject = null;

   public static void main(String[] args) throws JSONException {
       jObject = new JSONObject(jString);
       JSONObject geoObject = jObject.getJSONObject("geodata");

       String geoId = geoObject.getString("id");
           System.out.println(geoId);

       String name = geoObject.getString("name");
       System.out.println(name);

       String gender=geoObject.getString("gender");
       System.out.println(gender);

       String lat=geoObject.getString("latitude");
       System.out.println(lat);

       String longit =geoObject.getString("longitude");
       System.out.println(longit);                   
   }
}

Let me know what is it I am missing, or the reason why I do get that error everytime I run the application. Any comments would be appreciated.

private final static String JSON_DATA = "{" + " \"geodata\": [" + " {" + " \"id\": \"1\"," + " \"name\": \"Julie Sherman\"," + " \"gender\" : \"female\"," + " \"latitude\" : \"37.33774833333334\"," + " \"longitude\" : \"-121.88670166666667\"" + " }," + " {" + " \"id\": \"2\"," + " \"name\": \"Johnny Depp\"," + " \"gender\" : \"male\"," + " \"latitude\" : \"37.336453\"," + " \"longitude\" : \"-121.884985\"" + " }" + " ]" + "}";

import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; public class ShowActivity { private final static String JSON_DATA = "{" + " \"geodata\": [" + " {" + " \"id\": \"1\"," + " \"name\": \"Julie Sherman\"," + " \"gender\" : \"female\"," + " \"latitude\" : \"37.33774833333334\"," + " \"longitude\" : \"-121.88670166666667\"" + " }," + " {" + " \"id\": \"2\"," + " \"name\": \"Johnny Depp\"," + " \"gender\" : \"male\"," + " \"latitude\" : \"37.336453\"," + " \"longitude\" : \"-121.884985\"" + " }" + " ]" + "}"; public static void main(final String[] argv) throws JSONException { final JSONObject obj = new JSONObject(JSON_DATA); final JSONArray geodata = obj.getJSONArray("geodata"); final int n = geodata.length(); for (int i = 0; i < n; ++i) { final JSONObject person = geodata.getJSONObject(i); System.out.println(person.getInt("id")); System.out.println(person.getString("name")); System.out.println(person.getString("gender")); System.out.println(person.getDouble("latitude")); System.out.println(person.getDouble("longitude")); } } }

在 Java 中解析 JSON 字符串

推荐答案

Json相关问答推荐

ArcGIS json到Geojson的变换

给定一个包含两个数组的JSON输入文件，如何使用Jolt将一个数组中的每个元素与另一个数组组合在一起？

使用JQ将对象数组转换为平面数组

将 json 转换为 jsonb 安全吗？

jq ：遍历 json 并在键存在时检索集合

Jolt 变换 - 如何用字段值重命名字段？

PowerShell：如何将哈希表输出为 json 并使用 foreach 循环将其存储在变量中？

Rails 控制器无需编码即可渲染 json

如何使用 gson 调用默认反序列化

将 JSON 读取到 pandas 数据框 - ValueError：将 dicts 与非系列混合可能会导致排序不明确

.NET CORE 3 升级 CORS 和 Json(cycle) XMLHttpRequest 错误

使用 jq 从 bash 中管道分隔的键和值创建 JSON

Jackson 没有使用 @JsonProperty 覆盖 Getter

在 JSON 对象中强制执行非空字段

如何在不消除对象歧义的情况下使用 circe 解码 ADT

alert Json 对象

带有方法参数的 WCF webHttpBinding 错误. 最多可以在没有包装元素的情况下序列化一个主体参数

如何让 javascript 从 .json 文件中读取？

使用 axios 在 POST multipart/form-data 请求中发送文件和 json

如何从 jQuery ajax 调用将复杂对象传递给 ASP.NET WebApi GET？