JSONException：找不到对象

Question

这是我的代码：

JSONStringer result = new JSONStringer(); 

    for (long i = start; i <= end; i = i + day) { 
     ttm.put("$gte", "" + i); 
     ttm.put("$lte", "" + (i + day)); 
     //code code code 

     int count = statisticCollection.find(query).count(); 

     try { 
      result.object().key("ttm").value(i).key("count").value(count); 
     } catch (JSONException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 

    try { 
     result.endObject(); 
    } catch (JSONException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 

然后我得到一个JSONException。我也尝试创建并用不同try-catch块结束的对象，如下：

JSONStringer result = new JSONStringer(); 

    try { 
     result.object(); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 

    for (long i = start; i <= end; i = i + day) { 
     ttm.put("$gte", "" + i); 
     ttm.put("$lte", "" + (i + day)); 

     //code code code 

     long count = statisticCollection.find(query).count(); 

     try { 
      result.key("ttm").value(i).key("count").value(count); 
     } catch (JSONException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 

    try { 
     result.endObject(); 
    } catch (JSONException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 

和创造，并在for循环本身结束JSONStringer，如下所示：

JSONStringer result = new JSONStringer(); 

for (long i = start; i <= end; i = i + day) { 
    ttm.put("$gte", "" + i); 
    ttm.put("$lte", "" + (i + day)); 
    //code code code 

    int count = statisticCollection.find(query).count(); 

try { 
    result.object().key("ttm").value(i).key("count").value(count).endObject(); 
} catch (JSONException e) { 
      e.printStackTrace(); 
    } 

什么时我做错了？

谢谢。

Answer 1

你需要使用一个数组：

JSONStringer result = new JSONStringer(); 
JSONWriter array = result.array(); 

for (long i = start; i <= end; i = i + day) { 
    ttm.put("$gte", "" + i); 
    ttm.put("$lte", "" + (i + day)); 
    //code code code 

    int count = statisticCollection.find(query).count(); 

    try { 
     array.object().key("ttm").value(i).key("count").value(count).endObject(); 
    } catch (JSONException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
} 

try { 
    array.endArray(); 
} catch (JSONException e) { 
    // TODO Auto-generated catch block 
    e.printStackTrace(); 
}