Added an example for saving JSON objects/arrays to a file

Author: timpulver

examples/write_jsonarray_of_objects/write_jsonarray_of_objects.pde

@@ -0,0 +1,56 @@
+/*
+ * JSON 4 Processing
+ * Basic example 7: Creating a JSON Array of JSON Objects and saving it to a file.
+ *
+ * Good for saving multiple complex values, such as database tables.
+ *
+ * Author: Andreas Göransson, output additions: Tim Pulver
+ */
+
+import org.json.*;
+import java.io.File;
+
+void setup(){
+  
+  // Object creation like in example 3
+  // =================================================
+  
+  // 1. Initialize the Array
+  JSONArray myJsonUsers = new JSONArray();
+  
+  // 2. Create the first object & add to array
+  JSONObject firstUser = new JSONObject();
+  firstUser.put( "name", "Andreas" );
+  firstUser.put( "age", 32 );
+  myJsonUsers.put( firstUser );
+  
+  // 3. Create the second object
+  JSONObject secondUser = new JSONObject();
+  secondUser.put( "name", "Maria" );
+  secondUser.put( "age", 28 );
+  myJsonUsers.put( secondUser );
+  
+  // Writing the JSON Array / Object to a file
+  // ================================================= 
+ 
+  // will store the JSON Array in the file json_output.txt within the data directory
+  File file = new File(dataPath("") + File.separator + "json_output.txt");
+  // Create the data directory if it does not exist
+  file.getParentFile().mkdirs();  
+  try{
+    // If the file already exists, it will be overwritten
+    FileWriter fstream = new FileWriter(file, false);
+    // Use this instead if you want to append the data to the file
+    //FileWriter fstream = new FileWriter(file, true);    
+    BufferedWriter out = new BufferedWriter(fstream);
+    // do the actual writing
+    myJsonUsers.write(out);
+    // Close the stream
+    out.close();
+  }catch (Exception e){
+    System.err.println("Error writing the JSON file: " + e.getMessage());
+  } 
+}
+
+void draw(){
+}