java 移除 JSON 对象
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Remove object of JSON
提问by Gavin
How do I remove the object of JSON? I am using Hymanson API 2.6.3
如何删除JSON的对象？我正在使用Hyman逊 API 2.6.3
Example of my JSON String
我的 JSON 字符串示例
{
"movieList":[
{
"movieID":1,
"title":"TITLE 1",
"type":"DIGITAL",
"status":"COMING SOON",
"synopsis":null,
"director":null,
"mRating":"G",
"casts":null,
"showTimes":[
{
"date":"01/12/15",
"time":"22:00"
},
{
"date":"01/12/15",
"time":"23:30"
}
]
}
]
}
I would like to be able to remove the whole showTimes object given its index.
我希望能够删除整个 showTimes 对象的索引。
Something like showtimesList.get(index).remove()And if it is the last object in the arrayList, the value should be set to null.
喜欢的东西showtimesList.get(index).remove()而如果是在ArrayList中的最后一个对象，该值应设置为null。
As suggested by one of the answer, I am converting the JAVA Object ShowTimeto JSONNode by so
正如其中一个答案所建议的那样，我正在将 JAVA 对象转换ShowTime为 JSONNode
ObjectMapper objectMapper = new ObjectMapper();
JsonNode showTimesNode = objectMapper.convertValue(movieList.get(index).getShowTimes(), JsonNode.class);
Iterator<JsonNode> itr = showTimesNode.iterator();
int counter = 1;
while(itr.hasNext() && counter<=showTimeChoice){
if(counter==showTimeChoice){
itr.remove();
Cineplex.updateDatabase(cineplexList);
System.out.println("Sucessfully removed!");
break;
}
counter++;
}
But it's throwing the error Exception in thread "main" java.lang.IllegalStateException
at java.util.ArrayList$Itr.remove(Unknown Source)when I tries to remove the 2nd element of showTimeson the above given JSON String
但是Exception in thread "main" java.lang.IllegalStateException
at java.util.ArrayList$Itr.remove(Unknown Source)当我尝试删除showTimes上面给定的 JSON 字符串中的第二个元素时，它会抛出错误
Which is
这是
{
"date":"01/12/15",
"time":"23:30"
}
回答by Amadan
Something like this should work (I'm not a Hymanson user, so YMMV):
这样的事情应该可行（我不是 Hymanson 用户，所以 YMMV）：
((ObjectNode) movieListElement).remove("showTimes");
EDIT:
编辑：
JsonNode movieListElement = ((ArrayNode) root.path("movieList").get(index);
回答by sunysen
for (JsonNode personNode : rootNode) {
if (personNode instanceof ObjectNode) {
if (personNode.has("showTimes")) {
ObjectNode object = (ObjectNode) personNode;
object.remove("showTimes");
}
}
}
回答by Sudheer
Something like this should work
这样的事情应该工作
public void removeShowTime(int pos){
final JsonNode movieList = new ObjectMapper().readTree(json).get("movieList").get(0);
final JsonNode showList = movieList.get("showtimesList");
Iterator<JsonNode> itr = showList.iterator();
int counter = 0
while(itr.hasNext() && counter<=pos){
if(counter==pos){
itr.remove();
}
counter++;
}
}
