使用gson将新属性添加到特定的json节点 [英] Add a new property to a specific json node using gson
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问题描述
我正在探索gson,想检查我是否可以删除和添加元素。我有下面的json
{
header:{
timeStamp:2016- 02-09T15:22:36.107-08:00,
uniqueid:321ef660,
},
body:{
search:{
searchId:9206422282,
DateFrom:2016-04-15T00:00:00-07:00,
DateTo:2016-06-24T00:00: 00-07:00
},
金额:[
{
金额:73.704285,
currency:美元
,
amountagain:{
金额:96.791435,
货币:美元
},
获奖者:null,
pgoodId:null,
},
和现在我想在body下添加一个新元素,如:
{
header:{
timeStamp:2016-02-09T15:22:36.107-08:00,
uniqueid:321c5690-1d2e-4403-9c31-029cc47ef660,
},
body:{
search:{
searchId:9206422282,
DateFrom:2016-04-15T00:00:00-07:00,
DateTo:2016-06-24T00:00:00-07:00
AddANewFieldHere:**2016-04-18**
}
}
当我做时
JsonObject jsonObject = new JsonObject();
try {
JsonParser parser = new JsonParser();
JsonElement jsonElement = parser.parse(新的FileReader(src / main / resources / search.json));
jsonObject = jsonElement.getAsJsonObject();
} catch(FileNotFoundException e){
} catch(IOException ioe){
}
// jsonObject.get(报到);
jsonObject.addProperty(AddANewFieldHere,2016-04-18);
System.out.print(jsonObject);
$ p 它在文档末尾添加了这个属性,而不是我期望在body下。解决方案 jsonObject
是根节点。您需要导航到您要修改的节点。
JsonObject body = jsonObject.getAsJsonObject(body);
body.addProperty(AddANewFieldHere,2016-04-18);
在示例输出中,它看起来像希望它位于路径 body / search / searchId
not body
虽然:
JsonObject searchId = jsonObject
.getAsJsonObject(body)
.getAsJsonObject(search)
.getAsJsonObject(searchId);
searchId.addProperty(AddANewFieldHere,2016-04-18);
I am exploring gson and wanted to check if I can remove and add elements. I have the below json
{
"header": {
"timeStamp": "2016-02-09T15:22:36.107-08:00",
"uniqueid": "321ef660",
},
"body": {
"search": {
"searchId": 9206422282,
"DateFrom": "2016-04-15T00:00:00-07:00",
"DateTo": "2016-06-24T00:00:00-07:00"
}
},
"amount": [
{
"amount": 73.704285,
"currency": "USD"
},
"amountagain": {
"amount": 96.791435,
"currency": "USD"
},
"winners": null,
"pgoodId": null,
},
and now I want to add a new element under body like :
{
"header": {
"timeStamp": "2016-02-09T15:22:36.107-08:00",
"uniqueid": "321c5690-1d2e-4403-9c31-029cc47ef660",
},
"body": {
"search": {
"searchId": 9206422282,
"DateFrom": "2016-04-15T00:00:00-07:00",
"DateTo": "2016-06-24T00:00:00-07:00"
"AddANewFieldHere" : **"2016-04-18"**
}
}
when I do
JsonObject jsonObject = new JsonObject();
try {
JsonParser parser = new JsonParser();
JsonElement jsonElement = parser.parse(new FileReader("src/main/resources/search.json"));
jsonObject = jsonElement.getAsJsonObject();
} catch (FileNotFoundException e) {
} catch (IOException ioe){
}
// jsonObject.get("checkin");
jsonObject.addProperty("AddANewFieldHere","2016-04-18");
System.out.print(jsonObject);
}
It adds this property at the end of the document not as I expect under body.
解决方案 jsonObject
is the root node. You need to navigate to the node you want to modify.
JsonObject body = jsonObject.getAsJsonObject("body");
body.addProperty("AddANewFieldHere","2016-04-18");
From the example output, it looks like want it under the path body/search/searchId
not body
though:
JsonObject searchId = jsonObject
.getAsJsonObject("body")
.getAsJsonObject("search")
.getAsJsonObject("searchId");
searchId.addProperty("AddANewFieldHere","2016-04-18");
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