[JAVA] Receive multipart / form-data with Jerjey (Jax-rs)

Introduction

In [Android] Uploading images from terminal to server, the receiving side was Servlet. I really wanted to receive it at Jerjey, but I didn't know what to do and compromised. I've figured out how to do this this time, so I'll introduce it.

environment

Eclipse 4.13.0
java 11
Jerjey 2.29
How to insert here

Correspond to multipart / form-data

Please download the following.

Pass the path through these two.

Create Application class

As it is, multipart / form-data cannot be used yet, so in the package of the project you want to support Create [ApplicationConfig.java] and copy and paste the following.

`ApplicationConfig.java`


package com.Sample.api;

import org.glassfish.jersey.media.multipart.MultiPartFeature;
import org.glassfish.jersey.server.ResourceConfig;

public class ApplicationConfig extends ResourceConfig {
   public ApplicationConfig() {
     packages("pakage").register(MultiPartFeature.class);
   }
}

Please enter the package name to be used in "package". Then modify the Web.xml.

`Web.xml`


<servlet>
  <servlet-name>jersey-app</servlet-name>
  <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
  <init-param>
    <param-name>javax.ws.rs.Application</param-name>
    <!--Here"pakage.ApplicationConfig"Is the path of the class created above.-->
    <param-value>pakage.ApplicationConfig</param-value>
  </init-param>

  <init-param>
    <param-name>jersey.config.server.provider.classnames</param-name>
    <param-value>org.glassfish.jersey.media.multipart.MultiPartFeature</param-value>
</init-param>
 </servlet>

This completes multipart / form-data support.

Implementation

Create the following class.

`Upload.java`


import static java.nio.file.StandardCopyOption.*;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;

import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;

import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataParam;

@Path("/Upload")
public class Upload {
	@POST
	@Path("/File")
	@Consumes(MediaType.MULTIPART_FORM_DATA)
	public String upload(@FormDataParam(value = "file") InputStream fileStream,
	                    @FormDataParam(value = "file") FormDataContentDisposition fileDisposition) {
		 try {
		      Files.copy(fileStream, Paths.get("Save destination folder",fileDisposition.getFileName()), REPLACE_EXISTING);
		      return "END";
		    } catch (IOException e) {
		      throw new WebApplicationException(e, 500);
		    }

	}
}

Now http: // localhost / XX / api / Upload / File Send the file to (XX is the package name) and it should be saved.

reference

File upload with JAX-RS! http://blog.yumix.net/entry/2012/12/17/002515

Jersey settings 1 (web.xml, Application class, etc.) https://edgegram.hatenablog.jp/entry/2015/11/25/160433

java --JAX-RS HTTP multipart request https://tutorialmore.com/questions-1757453.htm