json tutorials

json-tutorials/json-json-simple-example/pom.xml

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+<?xml version="1.0"?>
+<project
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>net.aimeizi</groupId>
+		<artifactId>json-tutorials</artifactId>
+		<version>1.0.0</version>
+	</parent>
+	<artifactId>json-json-simple-example</artifactId>
+	<packaging>jar</packaging>
+	<name>json-json-simple-example</name>
+	<url>http://maven.apache.org</url>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.6</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>com.googlecode.json-simple</groupId>
+			<artifactId>json-simple</artifactId>
+			<version>1.1</version>
+		</dependency>
+	</dependencies>
+</project>

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"]}