adding some simple persistence

spring-5/src/main/java/com/baeldung/persistence/DataSetupBean.java

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+package com.baeldung.persistence;
+
+import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
+
+import java.util.stream.IntStream;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.baeldung.web.Foo;
+
+@Component
+public class DataSetupBean implements InitializingBean {
+
+    @Autowired
+    private FooRepository repo;
+
+    //
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        IntStream.range(1, 20).forEach(i -> repo.save(new Foo(randomAlphabetic(8))));
+    }
+
+}

spring-5/src/main/java/com/baeldung/persistence/FooRepository.java

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+package com.baeldung.persistence;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+
+import com.baeldung.web.Foo;
+
+public interface FooRepository extends JpaRepository<Foo, Long>, JpaSpecificationExecutor<Foo> {
+
+}