【发布时间】：2023-03-30 17:31:02
【问题描述】：
我是 Java 新手，在这段代码中，我试图将 JsonObect 放入 JsonArray 中，但问题是 JsonArray 只取最后一个值，并且在其中重复。
您不需要了解所有代码，只需了解有趣的部分
我把感兴趣的部分代码放在了 //******here******// code //******end here***** *// 如果要测试的话我也放了json文件
就我而言，我尝试将我的值放入 JsonObject 列表中，然后将其放入 JsonArray 中，但结果相同。
我也尝试过使用带有索引的哈希映射，但它仍然不起作用
如果您打印 JsonObject 变量“Alldate”，您可以看到它具有不同的值，但是当我将它们放入 JsonArray 数组“ArrayBuckets”时，您会看到 JsonArray 具有相同的值，即最后一个值。
我不明白，因为我的 jsonObject 和 Array 在同一个循环中。
谢谢。
代码如下：
package jsonbi.bi;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.simple.parser.JSONParser;
import com.google.gson.Gson;
public class JsonBi9 {
JSONParser parser = new JSONParser();
JSONObject json;
Object obj;
Map.Entry<String, JsonNode> field;
HashMap newmap = new HashMap();
JsonFactory factory = new JsonFactory();
private ObjectMapper mapper = new ObjectMapper();
Gson gson = new Gson();
JSONArray jsonArray = new JSONArray();
JSONObject Alldate = new JSONObject();
JSONObject BucketsObject = new JSONObject();
JSONObject Groupe = new JSONObject();
JSONObject Aggregations = new JSONObject();
JSONObject TheJson = new JSONObject();
JSONArray ArrayBuckets = new JSONArray();
Hashtable ht = new Hashtable();
int j =0;
public JsonBi9() {
try {
// here I am readind the json file
obj = parser.parse(new FileReader("myjson2.json"));
ObjectMapper mapper = new ObjectMapper(factory);
JsonNode rootNode = mapper.readTree(obj.toString());
Iterator<Map.Entry<String, JsonNode>> fieldsIterator = rootNode.getFields();
JSONObject jsonObject = new JSONObject(obj.toString());
// here I am reading the fields in the json fields
while (fieldsIterator.hasNext()) {
field = fieldsIterator.next();
newmap.put(field.getKey(), field.getValue());
if (field.getKey().equals("aggregations")) {
System.out.println("hugo");
JSONObject aggregations = jsonObject.getJSONObject("aggregations");
JSONObject groupe = aggregations.getJSONObject("groupe");
JSONArray buckets = groupe.getJSONArray("buckets");
for (int i11a = 0; i11a < buckets.length(); i11a++) {
JSONObject obj1bucket = buckets.getJSONObject(i11a);
JSONObject date11 = obj1bucket.getJSONObject("date");
JSONArray obj11bucket = date11.getJSONArray("buckets");
List<String> listSubbucket = new ArrayList<String>();
for (int i11 = 0; i11 < obj11bucket.length(); i11++) {
listSubbucket.add(obj11bucket.getJSONObject(i11).toString());
// System.out.println(obj11bucket.getJSONObject(i11).toString());
}
jsonArray = new JSONArray();
for (int i11 = 0; i11 < listSubbucket.size(); i11++) {
JSONObject SubBucket = new JSONObject();
SubBucket.put("buckets", listSubbucket.get(i11));
getdocument(obj1bucket, Alldate);
//******************************here ********************************//
// System.out.println(SubBucket);
Alldate.put("date", SubBucket);
ArrayBuckets.put(Alldate);
//*µµ if you want to print the jsonObject and array
// System.out.println(Alldate);
// System.out.println(ArrayBuckets);*
//*********************************end here ******************************//
} // end first for loop
} //end second for loop
Enumeration e = ht.elements();
while(e.hasMoreElements())
System.out.println(e.nextElement());
getdocument(groupe, Groupe);
Groupe.put("buckets", ArrayBuckets);
Aggregations.put("groupe", Groupe);
// System.out.println(Aggregations);
} // fin du if
else {
// System.out.println("Key: " + field.getKey() + "\tValue:"
// + field.getValue());
TheJson.put(field.getKey(), field.getValue());
} // fin du else
} // fin du while
// I put all the documents
TheJson.put("aggregations", Aggregations);
System.out.println(TheJson);
} catch (Exception e) {
e.printStackTrace();
}
}
public void getdocument(JSONObject obj1bucket, JSONObject Alldate) {
// get the json documents in the subbuckets
int i = 0;
// JSONObject buckectinfos1 = new JSONObject();
for (Iterator key = obj1bucket.keys(); key.hasNext();) {
Object jsonkeys;
try {
jsonkeys = obj1bucket.get((String) key.next());
Object jsonvalues = obj1bucket.names().getString(i);
String jsonInString = gson.toJson(jsonkeys);
if (!jsonkeys.getClass().getName().equals("org.json.JSONObject")
&& !jsonkeys.getClass().getName().equals("org.json.JSONArray")) {
} // fin du if
i++;
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} // fin du for
}
}
这是我想放入 JsonArray“ArrayBuckets”中的 JsonObject“alldate”中的值：
{"date":{"buckets":"{\"key_as_string\":\"2017-05-03T00:00:00.000Z\",\"doc_count\":1,\"value\":{\"value\":1},\"key\":1493769600000}"},"doc_count":"1","key":"\"a\""}
{"date":{"buckets":"{\"key_as_string\":\"2017-05-03T01:00:00.000Z\",\"doc_count\":2,\"value\":{\"value\":3},\"key\":1493776800000}"},"doc_count":"1","key":"\"a\""}
{"date":{"buckets":"{\"key_as_string\":\"2017-05-03T00:00:00.000Z\",\"doc_count\":4,\"value\":{\"value\":5},\"key\":1493769600000}"},"doc_count":"4","key":"\"b\""}
{"date":{"buckets":"{\"key_as_string\":\"2017-05-03T01:00:00.000Z\",\"doc_count\":5,\"value\":{\"value\":6},\"key\":1493773200000}"},"doc_count":"4","key":"\"b\""}
但我只有在 JsonArray "ArrayBuckets" 中重复的最后一个值：
{"date":{"buckets":"{\"key_as_string\":\"2017-05-03T01:00:00.000Z\",\"doc_count\":5,\"value\":{\"value\":6},\"key\":1493773200000}"},"doc_count":"4","key":"\"b\""}
这是 Json 文件：“myjson2.json”
{
"took": 7,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 10,
"max_score": 0,
"hits": []
},
"aggregations": {
"groupe": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "a",
"doc_count": 1,
"date": {
"buckets": [
{
"key_as_string": "2017-05-03T00:00:00.000Z",
"key": 1493769600000,
"doc_count": 1,
"value": {
"value": 1
}
},
{
"key_as_string": "2017-05-03T01:00:00.000Z",
"key": 1493776800000,
"doc_count": 2,
"value": {
"value": 3
}
}
]
}
},
{
"key": "b",
"doc_count": 4,
"date": {
"buckets": [
{
"key_as_string": "2017-05-03T00:00:00.000Z",
"key": 1493769600000,
"doc_count": 4,
"value": {
"value": 5
}
},
{
"key_as_string": "2017-05-03T01:00:00.000Z",
"key": 1493773200000,
"doc_count": 5,
"value": {
"value": 6
}
}
]
}
}
]
}
}
}
这是代码的结果：
{
"_shards":"{\"total\":5,\"failed\":0,\"successful\":5}",
"hits":"{\"hits\":[],\"total\":10,\"max_score\":0}",
"took":"7",
"timed_out":"false",
"aggregations":{
"groupe":{
"doc_count_error_upper_bound":"0",
"sum_other_doc_count":"0",
"buckets":[
{
"date":{
"buckets":"{\"key_as_string\":\"2017-05-03T01:00:00.000Z\",\"doc_count\":5,\"value\":{\"value\":6},\"key\":1493773200000}"
},
"doc_count":"4",
"key":"\"b\""
},
{
"date":{
"buckets":"{\"key_as_string\":\"2017-05-03T01:00:00.000Z\",\"doc_count\":5,\"value\":{\"value\":6},\"key\":1493773200000}"
},
"doc_count":"4",
"key":"\"b\""
},
{
"date":{
"buckets":"{\"key_as_string\":\"2017-05-03T01:00:00.000Z\",\"doc_count\":5,\"value\":{\"value\":6},\"key\":1493773200000}"
},
"doc_count":"4",
"key":"\"b\""
},
{
"date":{
"buckets":"{\"key_as_string\":\"2017-05-03T01:00:00.000Z\",\"doc_count\":5,\"value\":{\"value\":6},\"key\":1493773200000}"
},
"doc_count":"4",
"key":"\"b\""
}
]
}
}
}
【问题讨论】：
标签： java arrays json loops for-loop