Java 如何使用GSON在JSON数组中获取值
我想知道JSON数组中的select值 我的JSON是Java 如何使用GSON在JSON数组中获取值,java,json,gson,Java,Json,Gson,我想知道JSON数组中的select值 我的JSON是 { "meta": { "is_end": true, "total_count": 1, "pageable_count": 1 }, "documents": [ { "road_address": { "undergroun_yn": "N", "road_name": "충대로", "underground_yn": "N",
{
"meta": {
"is_end": true,
"total_count": 1,
"pageable_count": 1
},
"documents": [
{
"road_address": {
"undergroun_yn": "N",
"road_name": "충대로",
"underground_yn": "N",
"region_2depth_name": "청주시 서원구",
"zone_no": "28644",
"sub_building_no": "",
"region_3depth_name": "개신동",
"main_building_no": "1",
"address_name": "충북 청주시 서원구 충대로 1",
"y": "36.63003935314667",
"x": "127.45479196889647",
"region_1depth_name": "충북",
"building_name": "충북대학교"
},
"address_name": "충북 청주시 서원구 충대로 1",
"address": {
"b_code": "4311210900",
"region_3depth_h_name": "성화.개신.죽림동",
"main_address_no": "12",
"h_code": "4311259000",
"region_2depth_name": "청주시 서원구",
"main_adderss_no": "12",
"sub_address_no": "",
"region_3depth_name": "개신동",
"address_name": "충북 청주시 서원구 개신동 12",
"y": "36.6284039605616",
"x": "127.45921419389084",
"mountain_yn": "N",
"zip_code": "361763",
"region_1depth_name": "충북",
"sub_adderss_no": ""
},
"y": "36.63003935314667",
"x": "127.45479196889647",
"address_type": "ROAD_ADDR"
}
]
}
但是,出现以下代码错误:“java.lang.IllegalStateException:不是JSON对象”
所以,我试着去解决它们,并寻找很多方法。
我不使用“meta”的一部分,只使用JSON中的“documents”。
然后,我编写了java代码。
我的原始代码是
JsonElement jsonElement = parser.parse(html.toString()).getAsJsonObject();
JsonObject rootObj = jsonElement.getAsJsonObject();
JsonObject element = rootObj.get("documents").getAsJsonObject();
String y = element.getAsJsonObject().get("x").toString();
String x = element.getAsJsonObject().get("y").toString();
System.out.println(y);
System.out.println(x);
System.out.println(html.toString());
return html.toString();
我知道“文档”是JSON数组,所以我修改了我的代码。
我修改的java代码是
JsonElement jsonElement = parser.parse(html.toString()).getAsJsonObject();
JsonObject rootObj = jsonElement.getAsJsonObject();
String y = rootObj.getAsJsonArray().get(Integer.parseInt("x")).toString();
String x = rootObj.getAsJsonArray().get(Integer.parseInt("y")).toString();
System.out.println(y);
System.out.println(x);
System.out.println(html.toString());
return html.toString();
但也出现了错误,即“java.lang.IllegalStateException:不是JSON数组””
我想得到这样的结果
{
"documents": [
{
"road_address": {
"undergroun_yn": "N",
"road_name": "충대로",
"underground_yn": "N",
"region_2depth_name": "청주시 서원구",
"zone_no": "28644",
"sub_building_no": "",
"region_3depth_name": "개신동",
"main_building_no": "1",
"address_name": "충북 청주시 서원구 충대로 1",
"y": "36.63003935314667",
"x": "127.45479196889647",
"region_1depth_name": "충북",
"building_name": "충북대학교"
},
"address_name": "충북 청주시 서원구 충대로 1",
"address": {
"b_code": "4311210900",
"region_3depth_h_name": "성화.개신.죽림동",
"main_address_no": "12",
"h_code": "4311259000",
"region_2depth_name": "청주시 서원구",
"main_adderss_no": "12",
"sub_address_no": "",
"region_3depth_name": "개신동",
"address_name": "충북 청주시 서원구 개신동 12",
"y": "36.6284039605616",
"x": "127.45921419389084",
"mountain_yn": "N",
"zip_code": "361763",
"region_1depth_name": "충북",
"sub_adderss_no": ""
},
"y": "36.63003935314667",
"x": "127.45479196889647",
"address_type": "ROAD_ADDR"
}
]
}
}
然后得到键“x”,“y”和那些值
但是,错误不断发生。
如何解决这些问题 您应该遍历JSONArray以找到JSONObject,然后读取x和y值
JsonElement jsonElement = parser.parse(html.toString()).getAsJsonObject();
JsonObject rootObj = jsonElement.getAsJsonObject();
JsonArray documents = (JsonArray) rootObj.get("documents");
Iterator < JsonElement > itr = documents.iterator();
while (itr.hasNext()) {
JsonObject jsonObject = (JsonObject) itr.next();
double x = jsonObject.getDouble("x");
double y = jsonObject.getDouble("y");
}
JsonElement JsonElement=parser.parse(html.toString()).getAsJsonObject();
JsonObject rootObj=jsonElement.getAsJsonObject();
JsonArray文档=(JsonArray)rootObj.get(“文档”);
迭代器itr=documents.Iterator();
while(itr.hasNext()){
JsonObject JsonObject=(JsonObject)itr.next();
double x=jsonObject.getDouble(“x”);
double y=jsonObject.getDouble(“y”);
}
您应该遍历JSONArray以找到JSONObject,然后读取x和y值
JsonElement jsonElement = parser.parse(html.toString()).getAsJsonObject();
JsonObject rootObj = jsonElement.getAsJsonObject();
JsonArray documents = (JsonArray) rootObj.get("documents");
Iterator < JsonElement > itr = documents.iterator();
while (itr.hasNext()) {
JsonObject jsonObject = (JsonObject) itr.next();
double x = jsonObject.getDouble("x");
double y = jsonObject.getDouble("y");
}
JsonElement JsonElement=parser.parse(html.toString()).getAsJsonObject();
JsonObject rootObj=jsonElement.getAsJsonObject();
JsonArray文档=(JsonArray)rootObj.get(“文档”);
迭代器itr=documents.Iterator();
while(itr.hasNext()){
JsonObject JsonObject=(JsonObject)itr.next();
double x=jsonObject.getDouble(“x”);
double y=jsonObject.getDouble(“y”);
}
谢谢!我解决他们!!但是,只需修改代码即可。JsonElement=parser.parse(html.toString()).getAsJsonObject();JsonObject rootObj=jsonElement.getAsJsonObject();JsonArray文档=(JsonArray)rootObj.get(“文档”);迭代器itr=documents.Iterator();而(itr.hasNext()){JsonObject JsonObject=(JsonObject)itr.next();JsonElement x=JsonObject.get(“x”);JsonElement y=JsonObject.get(“y”);}谢谢!我解决他们!!但是,只需修改代码即可。JsonElement=parser.parse(html.toString()).getAsJsonObject();JsonObject rootObj=jsonElement.getAsJsonObject();JsonArray文档=(JsonArray)rootObj.get(“文档”);迭代器itr=documents.Iterator();而(itr.hasNext()){JsonObject JsonObject=(JsonObject)itr.next();JsonElement x=JsonObject.get(“x”);JsonElement y=JsonObject.get(“y”);}