Quarkus File Upload Example

This article shows you how to upload multiple files in the Quarkus application. 


 More Quarkus Related topics,

Technologies used:

  • Quarkus 2.2.3.Final
  • rest-easy-multipart 2.2.3:Final
  • Java 11
  • Maven 3
  • H2DB

Project Structure:




Maven dependencies(pom.xml)
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
https://maven.apache.org/xsd/maven-4.0.0.xsd"
    xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.knf.dev.demo</groupId>
    <artifactId>quarkus-upload-file</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <properties>
        <compiler-plugin.version>3.8.1</compiler-plugin.version>
        <maven.compiler.parameters>true</maven.compiler.parameters>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
   <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>
   <quarkus.platform.group-id>io.quarkus.platform</quarkus.platform.group-id>
        <quarkus.platform.version>2.2.3.Final</quarkus.platform.version>
        <surefire-plugin.version>3.0.0-M5</surefire-plugin.version>
    </properties>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>${quarkus.platform.group-id}</groupId>
                <artifactId>${quarkus.platform.artifact-id}</artifactId>
                <version>${quarkus.platform.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <!-- Server dependencies -->
        <dependency>
            <groupId>io.quarkus</groupId>
            <artifactId>quarkus-resteasy</artifactId>
        </dependency>
        <!-- Client dependencies -->
        <dependency>
            <groupId>io.quarkus</groupId>
            <artifactId>quarkus-rest-client</artifactId>
        </dependency>
        <dependency>
            <groupId>io.quarkus</groupId>
            <artifactId>quarkus-resteasy-multipart</artifactId>
        </dependency>
        <!-- Test dependencies -->
        <dependency>
            <groupId>io.quarkus</groupId>
            <artifactId>quarkus-junit5</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>io.rest-assured</groupId>
            <artifactId>rest-assured</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>${quarkus.platform.group-id}</groupId>
                <artifactId>quarkus-maven-plugin</artifactId>
                <version>${quarkus.platform.version}</version>
                <extensions>true</extensions>
                <executions>
                    <execution>
                        <goals>
                            <goal>build</goal>
                            <goal>generate-code</goal>
                            <goal>generate-code-tests</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${compiler-plugin.version}</version>
                <configuration>
                    <parameters>
                    ${maven.compiler.parameters}
                    </parameters>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>${surefire-plugin.version}</version>
                <configuration>
                    <systemPropertyVariables>
                        <java.util.logging.manager>
                        org.jboss.logmanager.LogManager
                        </java.util.logging.manager>
                        <maven.home>${maven.home}</maven.home>
                    </systemPropertyVariables>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <profiles>
        <profile>
            <id>native</id>
            <activation>
                <property>
                    <name>native</name>
                </property>
            </activation>
            <build>
                <plugins>
                    <plugin>
                        <artifactId>maven-failsafe-plugin</artifactId>
                        <version>${surefire-plugin.version}</version>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>integration-test</goal>
                                    <goal>verify</goal>
                                </goals>
                                <configuration>
                                    <systemPropertyVariables>
                                        <native.image.path>
${project.build.directory}/${project.build.finalName}-runner
                                        </native.image.path>
                                        <java.util.logging.manager>
org.jboss.logmanager.LogManager
                                        </java.util.logging.manager>
                                        <maven.home>
                                        ${maven.home}
                                        </maven.home>
                                    </systemPropertyVariables>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
            <properties>
                <quarkus.package.type>
                native
                </quarkus.package.type>
            </properties>
        </profile>
    </profiles>
</project>


FileUploadService
package com.knf.dev.demo;

import org.apache.commons.io.IOUtils;
import org.eclipse.microprofile.config.inject.ConfigProperty;
import org.jboss.resteasy.plugins.providers.multipart.InputPart;
import org.jboss.resteasy.plugins.providers.multipart.MultipartFormDataInput;
import javax.inject.Singleton;
import javax.ws.rs.core.MultivaluedMap;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@Singleton
public class FileUploadService {

    @ConfigProperty(name = "upload.directory")
    String UPLOAD_DIR;

    public String uploadFile(MultipartFormDataInput input) {
        Map<String, List<InputPart>> uploadForm = input.getFormDataMap();
        List<String> fileNames = new ArrayList<>();
        List<InputPart> inputParts = uploadForm.get("file");
        String fileName = null;
        for (InputPart inputPart : inputParts) {
            try {
                MultivaluedMap<String, String> header = 
                                                inputPart.getHeaders();
                fileName = getFileName(header);
                fileNames.add(fileName);
         InputStream inputStream = inputPart.getBody(InputStream.class, null);
                writeFile(inputStream,fileName);
                 } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return "Files Successfully Uploaded";
    }

    private void writeFile(InputStream inputStream,String fileName)
            throws IOException {
        byte[] bytes = IOUtils.toByteArray(inputStream);
        File customDir = new File(UPLOAD_DIR);
        fileName = customDir.getAbsolutePath() +
                File.separator + fileName;
        Files.write(Paths.get(fileName), bytes,
                StandardOpenOption.CREATE_NEW);
    }

    private String getFileName(MultivaluedMap<String, String> header) {
        String[] contentDisposition = header.
                getFirst("Content-Disposition").split(";");
        for (String filename : contentDisposition) {
            if ((filename.trim().startsWith("filename"))) {
                String[] name = filename.split("=");
                String finalFileName = name[1].trim().replaceAll("\"", "");
                return finalFileName;
            }
        }
        return "";
    }
}


MultiFileUploadController
package com.knf.dev.demo;

import org.jboss.resteasy.annotations.providers.multipart.MultipartForm;
import org.jboss.resteasy.plugins.providers.multipart.MultipartFormDataInput;
import javax.inject.Inject;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

@Path("/upload")
public class MultiFileUploadController {

@Inject
FileUploadService fileUploadService;

@POST
@Path("/files")
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_PLAIN)
public Response fileUpload(@MultipartForm MultipartFormDataInput
input) {
return Response.ok().
entity(fileUploadService.uploadFile(input)).build();
}
}


application.properties
upload.directory= /home/user/Pictures/files


Run

Build application jar file: mvn clean package


Start application: java -jar quarkus-run.jar

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