Updated MyBatis example

Author: alejandro-du

spring-boot-jpa/pom.xml

@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.6.6</version>
+		<version>3.1.5</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>
@@ -13,7 +13,7 @@
 	<name>spring-boot-jpa</name>
 	<description>Demo project for Spring Boot</description>
 	<properties>
-		<java.version>17</java.version>
+		<java.version>21</java.version>
 	</properties>
 	<dependencies>
 		<dependency>

spring-boot-jpa/src/main/java/com/example/Application.java

@@ -24,11 +24,16 @@ public Application(ProgrammingLanguageRepository repository) {
 	@Bean
 	public ApplicationRunner applicationRunner() {
 		return args -> {
+			deleteProgrammingLanguages();
 			createProgrammingLanguages();
 			printTopProgrammingLanguages();
 		};
 	}
 
+	private void deleteProgrammingLanguages() {
+		repository.deleteAll();
+	}
+
 	private void createProgrammingLanguages() {
 		Arrays.stream("Java,C++,C#,JavaScript,Rust,Go,Python,PHP".split(","))
 				.map(name -> new ProgrammingLanguage(name, (int) (Math.random() * 10)))

spring-boot-jpa/src/main/java/com/example/ProgrammingLanguage.java

@@ -2,7 +2,7 @@
 
 import java.util.Objects;
 
-import javax.persistence.*;
+import jakarta.persistence.*;
 
 @Entity
 @Table(name = "programming_language")

spring-boot-jpa/src/main/resources/application.properties

@@ -1,12 +1,12 @@
 spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MariaDBDialect
-spring.datasource.url=jdbc:mariadb://localhost:3306/spring_demo?createDatabaseIfNotExist=true
+spring.datasource.url=jdbc:mariadb://127.0.0.1:3306/demo
 spring.datasource.username=user
-spring.datasource.password=password
-spring.jpa.hibernate.ddl-auto=update
+spring.datasource.password=Password123!
+spring.jpa.hibernate.ddl-auto=none
 spring.jpa.show-sql=true
 
 # If you are using MariaDB SkySQL (https://mariadb.com/products/skysql),
 # enable SSL and specify the path to the CA chain file that you can download
 # from the SkySQL Portal (https://cloud.mariadb.com):
 #
-# jdbc:mariadb://demo-db0000xxxx.mdb000xxxx.db.skysql.net:5047/spring_demo?sslMode=verify-ca&serverSslCert=/path/to/your/skysql_chain.pem
+# jdbc:mariadb://demo-db0000xxxx.mdb000xxxx.db.skysql.net:5047/demo?sslMode=verify-ca&serverSslCert=/path/to/your/skysql_chain.pem

spring-boot-mybatis/pom.xml

@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.6.6</version>
+		<version>3.1.5</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>
@@ -13,13 +13,13 @@
 	<name>spring-boot-mybatis</name>
 	<description>Demo project for Spring Boot</description>
 	<properties>
-		<java.version>17</java.version>
+		<java.version>21</java.version>
 	</properties>
 	<dependencies>
 		<dependency>
 			<groupId>org.mybatis.spring.boot</groupId>
 			<artifactId>mybatis-spring-boot-starter</artifactId>
-			<version>2.2.2</version>
+			<version>3.0.2</version>
 		</dependency>
 
 		<dependency>

spring-boot-mybatis/src/main/java/com/example/Application.java

@@ -46,7 +46,7 @@ private void printTopProgrammingLanguages(int rating) {
 
 		List<ProgrammingLanguage> programmingLanguages = programmingLanguageMapper.findTopProgrammingLanguages(5);
 		programmingLanguages.stream()
-				.map(pl -> pl.getName() + ": " + pl.getRating())
+				.map(pl -> pl.getPlName() + ": " + pl.getPlRating())
 				.forEach(System.out::println);
 	}
 

spring-boot-mybatis/src/main/java/com/example/ProgrammingLanguage.java

@@ -2,24 +2,24 @@
 
 public class ProgrammingLanguage {
 
-	private String name;
+	private String plName;
 
-	private Integer rating;
+	private Integer plRating;
 
-	public String getName() {
-		return this.name;
+	public String getPlName() {
+		return this.plName;
 	}
 
-	public void setName(String name) {
-		this.name = name;
+	public void setPlName(String plName) {
+		this.plName = plName;
 	}
 
-	public Integer getRating() {
-		return this.rating;
+	public Integer getPlRating() {
+		return this.plRating;
 	}
 
-	public void setRating(Integer rating) {
-		this.rating = rating;
+	public void setPlRating(Integer plRating) {
+		this.plRating = plRating;
 	}
 
 }

spring-boot-mybatis/src/main/java/com/example/ProgrammingLanguageMapper.java

@@ -6,6 +6,8 @@
 import org.apache.ibatis.annotations.Insert;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Result;
+import org.apache.ibatis.annotations.Results;
 import org.apache.ibatis.annotations.Select;
 
 @Mapper
@@ -17,16 +19,20 @@ public interface ProgrammingLanguageMapper {
 	void deleteAll();
 
 	@Insert("""
-			INSERT INTO programming_language(name, rating)
+			INSERT INTO programming_language(pl_name, pl_rating)
 			VALUES(#{name}, #{rating})
 			""")
 	void insert(@Param("name") String name, @Param("rating") Integer rating);
 
 	@Select("""
-			SELECT name, rating
+			SELECT pl_name, pl_rating
 			FROM programming_language
-			WHERE rating > #{rating}
+			WHERE pl_rating > #{rating}
 			""")
+	@Results(id="plResult", value={
+		@Result(property="plName", column = "pl_name"),
+		@Result(property="plRating", column = "pl_rating")
+	})
 	List<ProgrammingLanguage> findTopProgrammingLanguages(@Param("rating") int rating);
 
 }

spring-boot-mybatis/src/main/resources/application.properties

@@ -1,9 +1,9 @@
-spring.datasource.url=jdbc:mariadb://localhost:3306/mybatis_demo
+spring.datasource.url=jdbc:mariadb://localhost:3306/demo
 spring.datasource.username=user
-spring.datasource.password=password
+spring.datasource.password=Password123!
 
 # If you are using MariaDB SkySQL (https://mariadb.com/products/skysql),
 # enable SSL and specify the path to the CA chain file that you can download
 # from the SkySQL Portal (https://cloud.mariadb.com):
 #
-# jdbc:mariadb://demo-db0000xxxx.mdb000xxxx.db.skysql.net:5047/mybatis_demo?sslMode=verify-ca&serverSslCert=/path/to/your/skysql_chain.pem
+# jdbc:mariadb://demo-db0000xxxx.mdb000xxxx.db.skysql.net:5047/demo?sslMode=verify-ca&serverSslCert=/path/to/your/skysql_chain.pem