diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index 1afb82bd42..da660157fe 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -18,6 +18,7 @@
+
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
index 017a39f7f5..f882ae2746 100644
--- a/.idea/encodings.xml
+++ b/.idea/encodings.xml
@@ -33,6 +33,8 @@
+
+
diff --git a/core-java-modules/core-java-strings/README.md b/core-java-modules/core-java-strings/README.md
index 4217d3e515..8b8f885262 100644
--- a/core-java-modules/core-java-strings/README.md
+++ b/core-java-modules/core-java-strings/README.md
@@ -10,7 +10,7 @@
- [Java Localization – Formatting Messages](https://www.baeldung.com/java-localization-messages-formatting)
- [Java – Generate Random String](https://www.baeldung.com/java-random-string)
- [Java String Interview Questions and Answers](https://www.baeldung.com/java-string-interview-questions)
-- [Java Multi-line String](https://www.baeldung.com/java-multiline-string)
+- [Java 多行字符串](https://www.ossez.com/t/java/14049)
- [Java 中的 String Pool 简介](https://www.ossez.com/t/java-string-pool/14017)
- [Java “constant string too long” 编译错误](https://www.ossez.com/t/java-constant-string-too-long/14048)
- [Java 对象如何安全的 toString](https://www.ossez.com/t/java-tostring/14000)
diff --git a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/IFooService.java b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/IFooService.java
deleted file mode 100644
index 8ce6a2d1ae..0000000000
--- a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/IFooService.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package com.baeldung.spring.data.persistence.repository;
-
-public interface IFooService {
- Foo create(Foo foo);
-}
\ No newline at end of file
diff --git a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/Foo.java b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/Foo.java
similarity index 95%
rename from persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/Foo.java
rename to persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/Foo.java
index 6833c4c556..219f5bffb6 100644
--- a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/Foo.java
+++ b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/Foo.java
@@ -1,4 +1,4 @@
-package com.baeldung.spring.data.persistence.repository;
+package com.baeldung.spring.data.persistence.saveperformance.repository;
import javax.persistence.*;
import java.io.Serializable;
diff --git a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/FooService.java b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/FooService.java
similarity index 80%
rename from persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/FooService.java
rename to persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/FooService.java
index cb09a92b82..c9dd306d96 100644
--- a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/FooService.java
+++ b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/FooService.java
@@ -1,4 +1,4 @@
-package com.baeldung.spring.data.persistence.repository;
+package com.baeldung.spring.data.persistence.saveperformance.repository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
diff --git a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/IFooDAO.java b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/IFooDAO.java
similarity index 84%
rename from persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/IFooDAO.java
rename to persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/IFooDAO.java
index 20a81e7bfa..68712f2c32 100644
--- a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/IFooDAO.java
+++ b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/IFooDAO.java
@@ -1,4 +1,4 @@
-package com.baeldung.spring.data.persistence.repository;
+package com.baeldung.spring.data.persistence.saveperformance.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
diff --git a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/IFooService.java b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/IFooService.java
new file mode 100644
index 0000000000..f016e308d6
--- /dev/null
+++ b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/IFooService.java
@@ -0,0 +1,5 @@
+package com.baeldung.spring.data.persistence.saveperformance.repository;
+
+public interface IFooService {
+ Foo create(Foo foo);
+}
\ No newline at end of file
diff --git a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/PersistenceConfig.java b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/PersistenceConfig.java
similarity index 97%
rename from persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/PersistenceConfig.java
rename to persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/PersistenceConfig.java
index f73ea94658..8ea27f968c 100644
--- a/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/PersistenceConfig.java
+++ b/persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/repository/PersistenceConfig.java
@@ -1,4 +1,4 @@
-package com.baeldung.spring.data.persistence.repository;
+package com.baeldung.spring.data.persistence.saveperformance.repository;
import com.google.common.base.Preconditions;
import org.springframework.beans.factory.annotation.Autowired;
diff --git a/persistence-modules/spring-data-jpa-repo-2/src/test/java/com/baeldung/spring/data/persistence/repository/FooServiceIntegrationTest.java b/persistence-modules/spring-data-jpa-repo-2/src/test/java/com/baeldung/spring/data/persistence/repository/FooServiceIntegrationTest.java
index 21990afb5e..0cc296397f 100644
--- a/persistence-modules/spring-data-jpa-repo-2/src/test/java/com/baeldung/spring/data/persistence/repository/FooServiceIntegrationTest.java
+++ b/persistence-modules/spring-data-jpa-repo-2/src/test/java/com/baeldung/spring/data/persistence/repository/FooServiceIntegrationTest.java
@@ -1,5 +1,8 @@
package com.baeldung.spring.data.persistence.repository;
+import com.baeldung.spring.data.persistence.saveperformance.repository.Foo;
+import com.baeldung.spring.data.persistence.saveperformance.repository.IFooService;
+import com.baeldung.spring.data.persistence.saveperformance.repository.PersistenceConfig;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;