json tutorials

json-tutorials/json-json-simple-example/src/main/java/org/json/json/simple/example/JsonSimpleReadExample.java

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+package org.json.json.simple.example;
+
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Iterator;
+
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+import org.json.simple.parser.JSONParser;
+import org.json.simple.parser.ParseException;
+
+public class JsonSimpleReadExample {
+
+	@SuppressWarnings("unchecked")
+	public static void main(String[] args) {
+		JSONParser parser = new JSONParser();
+
+		try {
+
+			Object obj = parser.parse(new FileReader("src/main/resources/test.json"));
+
+			JSONObject jsonObject = (JSONObject) obj;
+
+			String name = (String) jsonObject.get("name");
+			System.out.println(name);
+
+			long age = (Long) jsonObject.get("age");
+			System.out.println(age);
+
+			// loop array
+			JSONArray msg = (JSONArray) jsonObject.get("messages");
+			Iterator<String> iterator = msg.iterator();
+			while (iterator.hasNext()) {
+				System.out.println(iterator.next());
+			}
+
+		} catch (FileNotFoundException e) {
+			e.printStackTrace();
+		} catch (IOException e) {
+			e.printStackTrace();
+		} catch (ParseException e) {
+			e.printStackTrace();
+		}
+
+	}
+}

json-tutorials/json-json-simple-example/src/main/java/org/json/json/simple/example/JsonSimpleWriteExample.java

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+package org.json.json.simple.example;
+
+import java.io.FileWriter;
+import java.io.IOException;
+
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+
+public class JsonSimpleWriteExample {
+
+	@SuppressWarnings("unchecked")
+	public static void main(String[] args) {
+
+		JSONObject obj = new JSONObject();
+		obj.put("name", "mkyong.com");
+		obj.put("age", new Integer(100));
+
+		JSONArray list = new JSONArray();
+		list.add("msg 1");
+		list.add("msg 2");
+		list.add("msg 3");
+
+		obj.put("messages", list);
+
+		try {
+
+			FileWriter file = new FileWriter("src/main/resources/test.json");
+			file.write(obj.toJSONString());
+			file.flush();
+			file.close();
+
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+
+		System.out.print(obj);
+
+	}
+}

json-tutorials/json-json-simple-example/src/main/resources/test.json

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+{"age":100,"name":"mkyong.com","messages":["msg 1","msg 2","msg 3"]}