BAEL-2223: Processing JSONArray (#5547)

2018-10-27 21:32:16 +05:30
parent e31557b2dc
commit 44cef7b602
2 changed files with 65 additions and 0 deletions
@@ -0,0 +1,30 @@
+package com.baeldung.jsonjava;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+public class JSONArrayGetValueByKey {
+
+    public List<String> getValuesByKeyInJSONArray(String jsonArrayStr, String key) {
+        List<String> values = new ArrayList<>();
+        JSONArray jsonArray = new JSONArray(jsonArrayStr);
+        for (int idx = 0; idx < jsonArray.length(); idx++) {
+            JSONObject jsonObj = jsonArray.getJSONObject(idx);
+            values.add(jsonObj.optString(key));
+        }
+        return values;
+    }
+
+    public List<String> getValuesByKeyInJSONArrayUsingJava8(String jsonArrayStr, String key) {
+        JSONArray jsonArray = new JSONArray(jsonArrayStr);
+        return IntStream.range(0, jsonArray.length())
+            .mapToObj(index -> ((JSONObject) jsonArray.get(index)).optString(key))
+            .collect(Collectors.toList());
+    }
+
+}