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BAEL 1269 Intro to JSON-JAVA (eugenp#3493)
* Final commit * Made changes as per last review * Moved from core-java to json module
1 parent 3e4b6df commit 15f18bb

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‎json/pom.xml‎

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<version>${fastjson.version}</version>
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</dependency>
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<dependency>
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<groupId>org.json</groupId>
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<artifactId>json</artifactId>
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<version>20171018</version>
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</dependency>
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</dependencies>
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<properties>

‎json/src/main/java/com/baeldung/jsonjava/CDLDemo.java‎

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package com.baeldung.jsonjava;
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import org.json.CDL;
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import org.json.JSONArray;
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import org.json.JSONTokener;
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public class CDLDemo {
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public static void main(String[] args) {
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System.out.println("7.1. Producing JSONArray Directly from Comma Delimited Text: ");
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jsonArrayFromCDT();
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System.out.println("\n7.2. Producing Comma Delimited Text from JSONArray: ");
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cDTfromJSONArray();
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System.out.println("\n7.3.1. Producing JSONArray of JSONObjects Using Comma Delimited Text: ");
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jaOfJOFromCDT2();
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System.out.println("\n7.3.2. Producing JSONArray of JSONObjects Using Comma Delimited Text: ");
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jaOfJOFromCDT2();
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}
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public static void jsonArrayFromCDT() {
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JSONArray ja = CDL.rowToJSONArray(new JSONTokener("England, USA, Canada"));
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System.out.println(ja);
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}
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public static void cDTfromJSONArray() {
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JSONArray ja = new JSONArray("[\"England\",\"USA\",\"Canada\"]");
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String cdt = CDL.rowToString(ja);
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System.out.println(cdt);
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}
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public static void jaOfJOFromCDT() {
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String string =
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"name, city, age \n" +
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"john, chicago, 22 \n" +
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"gary, florida, 35 \n" +
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"sal, vegas, 18";
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JSONArray result = CDL.toJSONArray(string);
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System.out.println(result.toString());
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}
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public static void jaOfJOFromCDT2() {
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JSONArray ja = new JSONArray();
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ja.put("name");
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ja.put("city");
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ja.put("age");
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String string =
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"john, chicago, 22 \n" +
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"gary, florida, 35 \n" +
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"sal, vegas, 18";
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JSONArray result = CDL.toJSONArray(ja, string);
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System.out.println(result.toString());
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}
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}

‎json/src/main/java/com/baeldung/jsonjava/CookieDemo.java‎

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package com.baeldung.jsonjava;
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import org.json.Cookie;
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import org.json.JSONObject;
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public class CookieDemo {
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public static void main(String[] args) {
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System.out.println("8.1. Converting a Cookie String into a JSONObject");
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cookieStringToJSONObject();
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System.out.println("\n8.2. Converting a JSONObject into Cookie String");
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jSONObjectToCookieString();
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}
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public static void cookieStringToJSONObject() {
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String cookie = "username=John Doe; expires=Thu, 18 Dec 2013 12:00:00 UTC; path=/";
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JSONObject cookieJO = Cookie.toJSONObject(cookie);
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System.out.println(cookieJO);
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}
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public static void jSONObjectToCookieString() {
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JSONObject cookieJO = new JSONObject();
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cookieJO.put("name", "username");
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cookieJO.put("value", "John Doe");
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cookieJO.put("expires", "Thu, 18 Dec 2013 12:00:00 UTC");
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cookieJO.put("path", "/");
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String cookie = Cookie.toString(cookieJO);
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System.out.println(cookie);
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}
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}

‎json/src/main/java/com/baeldung/jsonjava/DemoBean.java‎

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package com.baeldung.jsonjava;
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public class DemoBean {
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private int id;
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private String name;
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private boolean active;
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public int getId() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public boolean isActive() {
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return active;
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}
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public void setActive(boolean active) {
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this.active = active;
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}
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}

‎json/src/main/java/com/baeldung/jsonjava/HTTPDemo.java‎

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package com.baeldung.jsonjava;
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import org.json.HTTP;
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import org.json.JSONObject;
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public class HTTPDemo {
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public static void main(String[] args) {
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System.out.println("9.1. Converting JSONObject to HTTP Header: ");
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jSONObjectToHTTPHeader();
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System.out.println("\n9.2. Converting HTTP Header String Back to JSONObject: ");
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hTTPHeaderToJSONObject();
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}
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public static void jSONObjectToHTTPHeader() {
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JSONObject jo = new JSONObject();
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jo.put("Method", "POST");
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jo.put("Request-URI", "http://www.example.com/");
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jo.put("HTTP-Version", "HTTP/1.1");
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System.out.println(HTTP.toString(jo));
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}
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public static void hTTPHeaderToJSONObject() {
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JSONObject obj = HTTP.toJSONObject("POST \"http://www.example.com/\" HTTP/1.1");
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System.out.println(obj);
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}
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}

‎json/src/main/java/com/baeldung/jsonjava/JSONArrayDemo.java‎

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package com.baeldung.jsonjava;
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import java.util.ArrayList;
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import java.util.List;
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import org.json.JSONArray;
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import org.json.JSONObject;
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public class JSONArrayDemo {
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public static void main(String[] args) {
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System.out.println("5.1. Creating JSON Array: ");
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creatingJSONArray();
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System.out.println("\n5.2. Creating JSON Array from JSON string: ");
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jsonArrayFromJSONString();
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System.out.println("\n5.3. Creating JSON Array from Collection Object: ");
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jsonArrayFromCollectionObj();
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}
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public static void creatingJSONArray() {
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JSONArray ja = new JSONArray();
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ja.put(Boolean.TRUE);
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ja.put("lorem ipsum");
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// We can also put a JSONObject in JSONArray
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JSONObject jo = new JSONObject();
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jo.put("name", "jon doe");
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jo.put("age", "22");
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jo.put("city", "chicago");
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ja.put(jo);
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System.out.println(ja.toString());
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}
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public static void jsonArrayFromJSONString() {
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JSONArray ja = new JSONArray("[true, \"lorem ipsum\", 215]");
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System.out.println(ja);
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}
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public static void jsonArrayFromCollectionObj() {
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List<String> list = new ArrayList<>();
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list.add("California");
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list.add("Texas");
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list.add("Hawaii");
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list.add("Alaska");
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JSONArray ja = new JSONArray(list);
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System.out.println(ja);
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}
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}

‎json/src/main/java/com/baeldung/jsonjava/JSONObjectDemo.java‎

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package com.baeldung.jsonjava;
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import java.util.HashMap;
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import java.util.Map;
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import org.json.JSONObject;
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public class JSONObjectDemo {
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public static void main(String[] args) {
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System.out.println("4.1. Creating JSONObject: ");
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jsonFromJSONObject();
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System.out.println("\n4.2. Creating JSONObject from Map: ");
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jsonFromMap();
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System.out.println("\n4.3. Creating JSONObject from JSON string: ");
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jsonFromJSONString();
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System.out.println("\n4.4. Creating JSONObject from Java Bean: ");
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jsonFromDemoBean();
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}
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public static void jsonFromJSONObject() {
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JSONObject jo = new JSONObject();
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jo.put("name", "jon doe");
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jo.put("age", "22");
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jo.put("city", "chicago");
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System.out.println(jo.toString());
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}
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public static void jsonFromMap() {
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Map<String, String> map = new HashMap<>();
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map.put("name", "jon doe");
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map.put("age", "22");
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map.put("city", "chicago");
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JSONObject jo = new JSONObject(map);
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System.out.println(jo.toString());
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}
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public static void jsonFromJSONString() {
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JSONObject jo = new JSONObject(
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"{\"city\":\"chicago\",\"name\":\"jon doe\",\"age\":\"22\"}"
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);
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System.out.println(jo.toString());
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}
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public static void jsonFromDemoBean() {
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DemoBean demo = new DemoBean();
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demo.setId(1);
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demo.setName("lorem ipsum");
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demo.setActive(true);
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JSONObject jo = new JSONObject(demo);
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System.out.println(jo);
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}
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}

‎json/src/main/java/com/baeldung/jsonjava/JSONTokenerDemo.java‎

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package com.baeldung.jsonjava;
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import org.json.JSONTokener;
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public class JSONTokenerDemo {
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public static void main(String[] args) {
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JSONTokener jt = new JSONTokener("Sample String");
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while(jt.more()) {
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System.out.println(jt.next());
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}
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}
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}

‎json/src/test/java/com/baeldung/jsonjava/CDLIntegrationTest.java‎

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package com.baeldung.jsonjava;
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import static org.junit.Assert.assertEquals;
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import org.json.CDL;
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import org.json.JSONArray;
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import org.json.JSONTokener;
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import org.junit.Test;
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public class CDLIntegrationTest {
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@Test
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public void givenCommaDelimitedText_thenConvertToJSONArray() {
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JSONArray ja = CDL.rowToJSONArray(new JSONTokener("England, USA, Canada"));
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assertEquals("[\"England\",\"USA\",\"Canada\"]", ja.toString());
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}
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@Test
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public void givenJSONArray_thenConvertToCommaDelimitedText() {
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JSONArray ja = new JSONArray("[\"England\",\"USA\",\"Canada\"]");
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String cdt = CDL.rowToString(ja);
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assertEquals("England,USA,Canada", cdt.toString().trim());
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}
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@Test
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public void givenCommaDelimitedText_thenGetJSONArrayOfJSONObjects() {
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String string =
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"name, city, age \n" +
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"john, chicago, 22 \n" +
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"gary, florida, 35 \n" +
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"sal, vegas, 18";
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JSONArray result = CDL.toJSONArray(string);
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assertEquals("[{\"name\":\"john\",\"city\":\"chicago\",\"age\":\"22\"},{\"name\":\"gary\",\"city\":\"florida\",\"age\":\"35\"},{\"name\":\"sal\",\"city\":\"vegas\",\"age\":\"18\"}]", result.toString());
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}
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@Test
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public void givenCommaDelimitedText_thenGetJSONArrayOfJSONObjects2() {
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JSONArray ja = new JSONArray();
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ja.put("name");
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ja.put("city");
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ja.put("age");
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String string =
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"john, chicago, 22 \n" +
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"gary, florida, 35 \n" +
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"sal, vegas, 18";
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JSONArray result = CDL.toJSONArray(ja, string);
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assertEquals("[{\"name\":\"john\",\"city\":\"chicago\",\"age\":\"22\"},{\"name\":\"gary\",\"city\":\"florida\",\"age\":\"35\"},{\"name\":\"sal\",\"city\":\"vegas\",\"age\":\"18\"}]", result.toString());
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}
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}

‎json/src/test/java/com/baeldung/jsonjava/CookieIntegrationTest.java‎

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package com.baeldung.jsonjava;
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import static org.junit.Assert.assertEquals;
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import org.json.Cookie;
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import org.json.JSONObject;
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import org.junit.Test;
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public class CookieIntegrationTest {
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@Test
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public void givenCookieString_thenConvertToJSONObject() {
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String cookie = "username=John Doe; expires=Thu, 18 Dec 2013 12:00:00 UTC; path=/";
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JSONObject cookieJO = Cookie.toJSONObject(cookie);
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assertEquals("{\"path\":\"/\",\"expires\":\"Thu, 18 Dec 2013 12:00:00 UTC\",\"name\":\"username\",\"value\":\"John Doe\"}", cookieJO.toString());
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}
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@Test
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public void givenJSONObject_thenConvertToCookieString() {
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JSONObject cookieJO = new JSONObject();
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cookieJO.put("name", "username");
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cookieJO.put("value", "John Doe");
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cookieJO.put("expires", "Thu, 18 Dec 2013 12:00:00 UTC");
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cookieJO.put("path", "/");
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String cookie = Cookie.toString(cookieJO);
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assertEquals("username=John Doe;expires=Thu, 18 Dec 2013 12:00:00 UTC;path=/", cookie.toString());
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}
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}

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