#160 - Add excerpts for Query by Example.

mongodb/query-by-example/README.md

@@ -8,5 +8,23 @@ Query by Example (QBE) is a user-friendly querying technique with a simple inter
 
 An `Example` takes a data object (usually the entity object or a subtype of it) and a specification how to match properties. You can use Query by Example with `MongoOperations` and Repositories.
 
+```java
+public interface PersonRepository extends CrudRepository<Person, String>, QueryByExampleExecutor {
+}
+```
+
+```java
+Example<Person> example = Example.of(new Person("Jon", "Snow"));
+repo.findAll(example);
+
+
+ExampleMatcher matcher = ExampleMatcher.matching().
+    .withMatcher("firstname", endsWith())
+    .withMatcher("lastname", startsWith().ignoreCase());
+
+Example<Person> example = Example.of(new Person("Jon", "Snow"), matcher); 
+repo.count(example);
+```
+
 This example contains two test classes to illustrate Query-by-Example with `MongoOperations` in `MongoOperationsIntegrationTests` and the usage with a Repository in `UserRepositoryIntegrationTests`.