add dependencies and start developing app

pom.xml

@@ -16,8 +16,8 @@
     <version>0.1</version>
 
     <properties>
-        <maven.compiler.release>23</maven.compiler.release>
+        <maven.compiler.release>21</maven.compiler.release>
-        <java.version>23</java.version>
+        <java.version>21</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <s3.version>2.31.47</s3.version>
@@ -27,24 +27,27 @@
         <dependency>
             <groupId>software.amazon.awssdk</groupId>
             <artifactId>s3</artifactId>
+            <version>${s3.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.springframework.boot</groupId>
+                    <artifactId>spring-boot-starter-tomcat</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jetty</artifactId>
         </dependency>
     </dependencies>
 
-    <dependencyManagement>
-        <dependencies>
-            <dependency>
-                <groupId>software.amazon.awssdk</groupId>
-                <artifactId>s3</artifactId>
-                <version>${s3.version}</version>
-            </dependency>
-
-            <dependency>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-starter-web</artifactId>
-            </dependency>
-        </dependencies>
-    </dependencyManagement>
-
     <build>
         <plugins>
             <plugin>

src/main/java/ua/com/dxrkness/Main.java

@@ -1,18 +1,11 @@
 package ua.com.dxrkness;
 
-import software.amazon.awssdk.regions.Region;
+import org.springframework.boot.SpringApplication;
-import software.amazon.awssdk.services.s3.S3Client;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
-
-import java.io.IOException;
 
+@SpringBootApplication
 public class Main {
-    public static void main(String[] args) throws IOException {
+    public static void main(String[] args) {
-
+        SpringApplication.run(Main.class, args);
-        final var s3 = S3Client.builder()
-                .region(Region.EU_CENTRAL_1)
-                .build();
-        try (s3) {
-            s3.listBuckets().buckets().forEach(System.out::println);
-        }
     }
 }

src/main/java/ua/com/dxrkness/S3Service.java

@@ -1,41 +0,0 @@
-package ua.com.dxrkness;
-
-import software.amazon.awssdk.services.s3.S3Client;
-import software.amazon.awssdk.services.s3.model.S3Object;
-
-import java.nio.file.Path;
-import java.util.List;
-
-public class S3Service {
-    private final S3Client client;
-    private final String bucketName;
-
-    public S3Service(S3Client client, String bucketName) {
-        this.client = client;
-        this.bucketName = bucketName;
-    }
-
-    public void createDirectory(Path path) {
-        throw new UnsupportedOperationException();
-    }
-
-    public Boolean delete(Path path) {
-        return client
-                .deleteObject(b -> b.bucket(bucketName).key(path.toString()).build())
-                .deleteMarker();
-    }
-
-    public List<S3Object> listing(Path path) {
-        return client
-                .listObjectsV2(b -> b.bucket(bucketName).build())
-                .contents();
-    }
-
-    public void uploadFile(Path path) {
-        throw new UnsupportedOperationException();
-    }
-
-    public String downloadFile(Path path) {
-        throw new UnsupportedOperationException();
-    }
-}

src/main/java/ua/com/dxrkness/config/S3Configuration.java

@@ -0,0 +1,16 @@
+package ua.com.dxrkness.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import software.amazon.awssdk.regions.Region;
+import software.amazon.awssdk.services.s3.S3Client;
+
+@Configuration
+public class S3Configuration {
+    @Bean
+    public S3Client client() {
+        return S3Client.builder()
+                .region(Region.EU_CENTRAL_1)
+                .build();
+    }
+}

src/main/java/ua/com/dxrkness/controller/S3ControllerConfig.java

@@ -0,0 +1,17 @@
+package ua.com.dxrkness.controller;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.function.RouterFunction;
+import org.springframework.web.servlet.function.RouterFunctions;
+import org.springframework.web.servlet.function.ServerResponse;
+
+@Configuration
+public class S3ControllerConfig {
+    @Bean
+    public RouterFunction<ServerResponse> router() {
+        return RouterFunctions.route()
+                .GET()
+                .build();
+    }
+}

src/main/java/ua/com/dxrkness/controller/S3FileHandler.java

@@ -0,0 +1,4 @@
+package ua.com.dxrkness.controller;
+
+public class S3FileHandler {
+}

src/main/java/ua/com/dxrkness/service/S3Service.java

@@ -0,0 +1,59 @@
+package ua.com.dxrkness.service;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+import software.amazon.awssdk.core.sync.RequestBody;
+import software.amazon.awssdk.services.s3.S3Client;
+import software.amazon.awssdk.services.s3.model.S3Object;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.nio.channels.*;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Path;
+import java.util.List;
+
+@Service
+public class S3Service {
+    private final S3Client client;
+    private final String bucketName;
+
+    public S3Service(S3Client client,
+                     @Value("s3.bucket-name") String bucketName) {
+        this.client = client;
+        this.bucketName = bucketName;
+    }
+
+    public void createDirectory(Path path) {
+        throw new UnsupportedOperationException();
+    }
+
+    public Boolean delete(Path path) {
+        return client
+                .deleteObject(b -> b.bucket(bucketName).key(path.toString()).build())
+                .deleteMarker();
+    }
+
+    public List<S3Object> listing(Path path) {
+        return client
+                .listObjectsV2(b -> b.bucket(bucketName).build())
+                .contents();
+    }
+
+    public Boolean uploadFile(MultipartFile file) throws IOException {
+        return client
+                .putObject(b -> b
+                                .bucket(bucketName)
+                                .key(file.getName()),
+                        RequestBody.fromInputStream(file.getInputStream(), file.getSize()))
+                .bucketKeyEnabled();
+    }
+
+    public Reader downloadFile(String key, Path destinationPath) {
+        return Channels.newReader(
+                Channels.newChannel(client
+                        .getObject(b -> b.bucket(bucketName).key(key))),
+                StandardCharsets.UTF_8);
+    }
+}

src/main/resources/application.properties

@@ -0,0 +1 @@
+s3.bucket-name=student-test-bucket-orlovos-2025