步骤3: 使用has()方法检查键是否存在 现在你可以使用has()方法来检查是否存在你所需要的 Key。继续在main方法中添加以下代码: // 检查 JSONObject 是否包含指定的 KeyStringkeyToCheck="name";if(jsonObject.has(keyToCheck)){System.out.println("Key \""+keyToCheck+"\" exists in the JSON object.");...
//Check if key exists if(this.opt(key)!=null) { //key already exists throwx.syntaxError("Duplicate key\""+key+"\""); } //Only add value if non-null Objectvalue=x.nextValue(); if(value!=null) { this.put(key, value);
true if the key exists in the JSONObject. increment public JSONObject increment(String key) throws JSONException Increment a property of a JSONObject. If there is no such property, create one with a value of 1. If there is such a property, and if it is an Integer, Long, Double, ...
containsKey方法会返回一个布尔值,指示JSONObject中是否包含指定的key。 根据containsKey方法的返回值判断key是否存在,并输出相应信息。 下面是一个完整的代码示例: java import com.alibaba.fastjson.JSONObject; public class FastJsonExample { public static void main(String[] args) { // 创建一个JSON字符串 Strin...
}finally{if(response !=null) { EntityUtils.consumeQuietly(response.getEntity()); } } } 开发者ID:dernasherbrezon,项目名称:r2cloud,代码行数:23,代码来源:RestClient.java 示例2: setup ▲点赞 4▼ importcom.eclipsesource.json.JsonObject;//导入依赖的package包/类publicvoidsetup(String keyword, Strin...
has(java.lang.String memberName) Convenience method to check if a member with the specified name is present in this object. int hashCode() java.util.Set<java.lang.String> keySet() Returns a set of members key values. JsonElement remove(java.lang.String property) Removes the propert...
count() - int 0 if related object is a dictionary return number of keys, if related object is a array return length of array isNull() - boolean - return true if related object is null exist() - boolean - return true if related object with index or key exists getJsonArray() - JSON...
getInputStream()).entrySet()) { PluginWrapper pw = getPlugin(p.getKey()); JSONObject j = new JSONObject() .accumulate("name", p.getKey()) .accumulate("version", p.getValue().toString()); if (pw == null) { // install new response.add(j.accumulate("mode", "missing")); } ...
}elseif(jsonValidType == JSON_BOOLEAN) { jsonObject.set(cellRef, Boolean.getBoolean(value)); }else{ jsonObject.set(cellRef, value); } } 开发者ID:rodrigoEclipsa,项目名称:excelToApp,代码行数:29,代码来源:ExcelManager.java 示例2: write ...
checkAndSaveIfNotExists(dataFeedId, collectionCode, imageUrl); } } }catch(Exception e){ logger.error("Error in persisting ::: " + message); logger.error("Exception while persisting to postgres db ", e ); } } Example 8Source File: EntityRule.java From FairEmail with GNU General Public ...