BAEL 1269 Intro to JSON-JAVA

json/pom.xml

@@ -31,6 +31,11 @@
             <version>${fastjson.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.json</groupId>
+            <artifactId>json</artifactId>
+            <version>20171018</version>
+        </dependency>
     </dependencies>
 
     <properties>

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

@@ -0,0 +1,59 @@
+package com.baeldung.jsonjava;
+
+import org.json.CDL;
+import org.json.JSONArray;
+import org.json.JSONTokener;
+
+public class CDLDemo {
+    public static void main(String[] args) {
+        System.out.println("7.1. Producing JSONArray Directly from Comma Delimited Text: ");
+        jsonArrayFromCDT();
+
+        System.out.println("\n7.2. Producing Comma Delimited Text from JSONArray: ");
+        cDTfromJSONArray();
+
+        System.out.println("\n7.3.1. Producing JSONArray of JSONObjects Using Comma Delimited Text: ");
+        jaOfJOFromCDT2();
+
+        System.out.println("\n7.3.2. Producing JSONArray of JSONObjects Using Comma Delimited Text: ");
+        jaOfJOFromCDT2();
+    }
+
+    public static void jsonArrayFromCDT() {
+        JSONArray ja = CDL.rowToJSONArray(new JSONTokener("England, USA, Canada"));
+        System.out.println(ja);
+    }
+
+    public static void cDTfromJSONArray() {
+        JSONArray ja = new JSONArray("[\"England\",\"USA\",\"Canada\"]");
+        String cdt = CDL.rowToString(ja);
+        System.out.println(cdt);
+    }
+
+    public static void jaOfJOFromCDT() {
+        String string = 
+          "name, city, age \n" +
+          "john, chicago, 22 \n" +
+          "gary, florida, 35 \n" +
+          "sal, vegas, 18";
+
+        JSONArray result = CDL.toJSONArray(string);
+        System.out.println(result.toString());
+    }
+
+    public static void jaOfJOFromCDT2() {
+        JSONArray ja = new JSONArray();
+        ja.put("name");
+        ja.put("city");
+        ja.put("age");
+
+        String string = 
+          "john, chicago, 22 \n" +
+          "gary, florida, 35 \n" +
+          "sal, vegas, 18";
+
+        JSONArray result = CDL.toJSONArray(ja, string);
+        System.out.println(result.toString());
+    }
+
+}

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

@@ -0,0 +1,30 @@
+package com.baeldung.jsonjava;
+
+import org.json.Cookie;
+import org.json.JSONObject;
+
+public class CookieDemo {
+    public static void main(String[] args) {
+        System.out.println("8.1. Converting a Cookie String into a JSONObject");
+        cookieStringToJSONObject();
+
+        System.out.println("\n8.2. Converting a JSONObject into Cookie String");
+        jSONObjectToCookieString();
+    }
+
+    public static void cookieStringToJSONObject() {
+        String cookie = "username=John Doe; expires=Thu, 18 Dec 2013 12:00:00 UTC; path=/";
+        JSONObject cookieJO = Cookie.toJSONObject(cookie);
+        System.out.println(cookieJO);
+    }
+
+    public static void jSONObjectToCookieString() {
+        JSONObject cookieJO = new JSONObject();
+        cookieJO.put("name", "username");
+        cookieJO.put("value", "John Doe");
+        cookieJO.put("expires", "Thu, 18 Dec 2013 12:00:00 UTC");
+        cookieJO.put("path", "/");
+        String cookie = Cookie.toString(cookieJO);
+        System.out.println(cookie);
+    }
+}

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

@@ -0,0 +1,26 @@
+package com.baeldung.jsonjava;
+
+public class DemoBean {
+    private int id;
+    private String name;
+    private boolean active;
+
+    public int getId() {
+        return id;
+    }
+    public void setId(int id) {
+        this.id = id;
+    }
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+    public boolean isActive() {
+        return active;
+    }
+    public void setActive(boolean active) {
+        this.active = active;
+    }
+}

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

@@ -0,0 +1,27 @@
+package com.baeldung.jsonjava;
+
+import org.json.HTTP;
+import org.json.JSONObject;
+
+public class HTTPDemo {
+    public static void main(String[] args) {
+        System.out.println("9.1. Converting JSONObject to HTTP Header: ");
+        jSONObjectToHTTPHeader();
+
+        System.out.println("\n9.2. Converting HTTP Header String Back to JSONObject: ");
+        hTTPHeaderToJSONObject();
+    }
+
+    public static void jSONObjectToHTTPHeader() {
+        JSONObject jo = new JSONObject();
+        jo.put("Method", "POST");
+        jo.put("Request-URI", "http://www.example.com/");
+        jo.put("HTTP-Version", "HTTP/1.1");
+        System.out.println(HTTP.toString(jo));
+    }
+
+    public static void hTTPHeaderToJSONObject() {
+        JSONObject obj = HTTP.toJSONObject("POST \"http://www.example.com/\" HTTP/1.1");
+        System.out.println(obj);
+    }
+}

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

@@ -0,0 +1,52 @@
+package com.baeldung.jsonjava;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+public class JSONArrayDemo {
+    public static void main(String[] args) {
+        System.out.println("5.1. Creating JSON Array: ");
+        creatingJSONArray();
+
+        System.out.println("\n5.2. Creating JSON Array from JSON string: ");
+        jsonArrayFromJSONString();
+
+        System.out.println("\n5.3. Creating JSON Array from Collection Object: ");
+        jsonArrayFromCollectionObj();
+    }
+
+    public static void creatingJSONArray() {
+        JSONArray ja = new JSONArray();
+        ja.put(Boolean.TRUE);
+        ja.put("lorem ipsum");
+
+        // We can also put a JSONObject in JSONArray
+        JSONObject jo = new JSONObject();
+        jo.put("name", "jon doe");
+        jo.put("age", "22");
+        jo.put("city", "chicago");
+
+        ja.put(jo);
+
+        System.out.println(ja.toString());
+    }
+
+    public static void jsonArrayFromJSONString() {
+        JSONArray ja = new JSONArray("[true, \"lorem ipsum\", 215]");
+        System.out.println(ja);
+    }
+
+    public static void jsonArrayFromCollectionObj() {
+        List<String> list = new ArrayList<>();
+        list.add("California");
+        list.add("Texas");
+        list.add("Hawaii");
+        list.add("Alaska");
+
+        JSONArray ja = new JSONArray(list);
+        System.out.println(ja);
+    }
+}

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

@@ -0,0 +1,59 @@
+package com.baeldung.jsonjava;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.json.JSONObject;
+
+public class JSONObjectDemo {
+    public static void main(String[] args) {
+        System.out.println("4.1. Creating JSONObject: ");
+        jsonFromJSONObject();
+
+        System.out.println("\n4.2. Creating JSONObject from Map: ");
+        jsonFromMap();
+
+        System.out.println("\n4.3. Creating JSONObject from JSON string: ");
+        jsonFromJSONString();
+
+        System.out.println("\n4.4. Creating JSONObject from Java Bean: ");
+        jsonFromDemoBean();
+    }
+
+    public static void jsonFromJSONObject() {
+        JSONObject jo = new JSONObject();
+        jo.put("name", "jon doe");
+        jo.put("age", "22");
+        jo.put("city", "chicago");
+
+        System.out.println(jo.toString());
+    }
+
+    public static void jsonFromMap() {
+        Map<String, String> map = new HashMap<>();
+        map.put("name", "jon doe");
+        map.put("age", "22");
+        map.put("city", "chicago");
+        JSONObject jo = new JSONObject(map);
+
+        System.out.println(jo.toString());
+    }
+
+    public static void jsonFromJSONString() {
+        JSONObject jo = new JSONObject(
+          "{\"city\":\"chicago\",\"name\":\"jon doe\",\"age\":\"22\"}"
+        );
+
+        System.out.println(jo.toString());
+    }
+
+    public static void jsonFromDemoBean() {
+        DemoBean demo = new DemoBean();
+        demo.setId(1);
+        demo.setName("lorem ipsum");
+        demo.setActive(true);
+
+        JSONObject jo = new JSONObject(demo);
+        System.out.println(jo);
+    }
+}

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

@@ -0,0 +1,13 @@
+package com.baeldung.jsonjava;
+
+import org.json.JSONTokener;
+
+public class JSONTokenerDemo {
+    public static void main(String[] args) {
+        JSONTokener jt = new JSONTokener("Sample String");
+
+        while(jt.more()) {
+            System.out.println(jt.next());
+        }
+    }
+}

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

@@ -0,0 +1,52 @@
+package com.baeldung.jsonjava;
+
+import static org.junit.Assert.assertEquals;
+
+import org.json.CDL;
+import org.json.JSONArray;
+import org.json.JSONTokener;
+import org.junit.Test;
+
+public class CDLIntegrationTest {
+    @Test
+    public void givenCommaDelimitedText_thenConvertToJSONArray() {
+        JSONArray ja = CDL.rowToJSONArray(new JSONTokener("England, USA, Canada"));
+        assertEquals("[\"England\",\"USA\",\"Canada\"]", ja.toString());
+    }
+
+    @Test
+    public void givenJSONArray_thenConvertToCommaDelimitedText() {
+        JSONArray ja = new JSONArray("[\"England\",\"USA\",\"Canada\"]");
+        String cdt = CDL.rowToString(ja);
+        assertEquals("England,USA,Canada", cdt.toString().trim());
+    }
+
+    @Test
+    public void givenCommaDelimitedText_thenGetJSONArrayOfJSONObjects() {
+        String string = 
+          "name, city, age \n" +
+          "john, chicago, 22 \n" +
+          "gary, florida, 35 \n" +
+          "sal, vegas, 18";
+
+        JSONArray result = CDL.toJSONArray(string);
+        assertEquals("[{\"name\":\"john\",\"city\":\"chicago\",\"age\":\"22\"},{\"name\":\"gary\",\"city\":\"florida\",\"age\":\"35\"},{\"name\":\"sal\",\"city\":\"vegas\",\"age\":\"18\"}]", result.toString());
+    }
+
+    @Test
+    public void givenCommaDelimitedText_thenGetJSONArrayOfJSONObjects2() {
+        JSONArray ja = new JSONArray();
+        ja.put("name");
+        ja.put("city");
+        ja.put("age");
+
+        String string = 
+          "john, chicago, 22 \n" +
+          "gary, florida, 35 \n" +
+          "sal, vegas, 18";
+
+        JSONArray result = CDL.toJSONArray(ja, string);
+        assertEquals("[{\"name\":\"john\",\"city\":\"chicago\",\"age\":\"22\"},{\"name\":\"gary\",\"city\":\"florida\",\"age\":\"35\"},{\"name\":\"sal\",\"city\":\"vegas\",\"age\":\"18\"}]", result.toString());
+    }
+
+}

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

@@ -0,0 +1,29 @@
+package com.baeldung.jsonjava;
+
+import static org.junit.Assert.assertEquals;
+
+import org.json.Cookie;
+import org.json.JSONObject;
+import org.junit.Test;
+
+public class CookieIntegrationTest {
+    @Test
+    public void givenCookieString_thenConvertToJSONObject() {
+        String cookie = "username=John Doe; expires=Thu, 18 Dec 2013 12:00:00 UTC; path=/";
+        JSONObject cookieJO = Cookie.toJSONObject(cookie);
+
+        assertEquals("{\"path\":\"/\",\"expires\":\"Thu, 18 Dec 2013 12:00:00 UTC\",\"name\":\"username\",\"value\":\"John Doe\"}", cookieJO.toString());
+    }
+
+    @Test
+    public void givenJSONObject_thenConvertToCookieString() {
+        JSONObject cookieJO = new JSONObject();
+        cookieJO.put("name", "username");
+        cookieJO.put("value", "John Doe");
+        cookieJO.put("expires", "Thu, 18 Dec 2013 12:00:00 UTC");
+        cookieJO.put("path", "/");
+        String cookie = Cookie.toString(cookieJO);
+
+        assertEquals("username=John Doe;expires=Thu, 18 Dec 2013 12:00:00 UTC;path=/", cookie.toString());
+    }
+}

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

@@ -0,0 +1,25 @@
+package com.baeldung.jsonjava;
+
+import static org.junit.Assert.assertEquals;
+import org.json.HTTP;
+import org.json.JSONObject;
+import org.junit.Test;
+
+public class HTTPIntegrationTest {
+    @Test
+    public void givenJSONObject_thenConvertToHTTPHeader() {
+        JSONObject jo = new JSONObject();
+        jo.put("Method", "POST");
+        jo.put("Request-URI", "http://www.example.com/");
+        jo.put("HTTP-Version", "HTTP/1.1");
+
+        assertEquals("POST \"http://www.example.com/\" HTTP/1.1"+HTTP.CRLF+HTTP.CRLF, HTTP.toString(jo));
+    }
+
+    @Test
+    public void givenHTTPHeader_thenConvertToJSONObject() {
+        JSONObject obj = HTTP.toJSONObject("POST \"http://www.example.com/\" HTTP/1.1");
+
+        assertEquals("{\"Request-URI\":\"http://www.example.com/\",\"Method\":\"POST\",\"HTTP-Version\":\"HTTP/1.1\"}", obj.toString());
+    }
+}