Add JSON Schema validation

json/src/test/java/org/baeldung/json/schema/JSONSchemaTest.java

@@ -0,0 +1,32 @@
+package org.baeldung.json.schema;
+
+import org.everit.json.schema.Schema;
+import org.everit.json.schema.ValidationException;
+import org.everit.json.schema.loader.SchemaLoader;
+
+import org.json.JSONObject;
+import org.json.JSONTokener;
+import org.junit.Test;
+
+public class JSONSchemaTest {
+
+    @Test
+    public void validateJSON() {
+
+        JSONObject jsonSchema = new JSONObject(new JSONTokener(JSONSchemaTest.class.getResourceAsStream("/schema.json")));
+        JSONObject jsonSubject = new JSONObject(new JSONTokener(JSONSchemaTest.class.getResourceAsStream("/product.json")));
+
+        Schema schema = SchemaLoader.load(jsonSchema);
+
+        try {
+
+            schema.validate(jsonSubject);
+        }
+
+        catch (ValidationException e) {
+
+            System.out.println(e.getMessage());
+            e.getCausingExceptions().stream().map(ValidationException::getMessage).forEach(System.out::println);
+        }
+    }
+}

json/src/test/resources/product.json

@@ -0,0 +1,5 @@
+{
+    "id": 1,
+    "name": "Lampshade",
+    "price": 0
+}

json/src/test/resources/schema.json

@@ -0,0 +1,22 @@
+{
+    "$schema": "http://json-schema.org/draft-04/schema#",
+    "title": "Product",
+    "description": "A product from the catalog",
+    "type": "object",
+    "properties": {
+        "id": {
+            "description": "The unique identifier for a product",
+            "type": "integer"
+        },
+        "name": {
+            "description": "Name of the product",
+            "type": "string"
+        },
+        "price": {
+            "type": "number",
+            "minimum": 0,
+            "exclusiveMinimum": true
+        }
+    },
+    "required": ["id", "name", "price"]
+}