Single and Multiple Files Upload Example in Spring MVC

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Description

Spring has built in multipart support to handle file uploads in web applications with the help of MultipartResolver objects, Spring provides a MultipartResolver for use with Commons FileUpload . By default, no multipart handling will be done by Spring, so developers should implement the logic by themselves.

1) pom.xml

Add below dependency in pom.xml

	<dependency>
		<groupId>commons-fileupload</groupId>
		<artifactId>commons-fileupload</artifactId>
		<version>1.3.1</version>
	</dependency>

**2) Add below code in spring configuration xml file **

<beans:bean id="commonsMultipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

		 <!--  upload size -->
		<beans:property name="maxUploadSize" value="1000000" />

	</beans:bean>

3) singlefileupload.jsp

<html>
<body>
	<form method="POST" action="/upload/singleFileUpload" enctype="multipart/form-data">
		Please select a File <input type="file" name="file">
 
		File Description: <input type="text" name="description">
 
 
		<input type="submit" value="Upload"> click me to upload the file.
	</form>	
</body>
</html>

4)mutliplefilesupload.jsp


<html>
<body>
	<form method="POST" action="/upload/uploadMultipleFiles" enctype="multipart/form-data">
		Please select file1 :<input type="file" name="file">
 
		File Description1: <input type="text" name="description">
 
 
		Please select file2 :<input type="file" name="file">
 
		File Description2 : <input type="text" name="description">
 

		<input type="submit" value="Upload"> click me to upload the files
	</form>
</body>
</html>

5) MultiFileUploadController .java


import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

@RestController 
@RequestMapping(value ="/upload”)

public class MultiFileUploadController {

private static String UPLOADED_FOLDER = "E://uploadedfiles//";

@RequestMapping(value = "/singleFileUpload ", method = RequestMethod.POST)
public String uploadSingleFile(@RequestParam("description ") String description,@RequestParam("file") MultipartFile file) {

             String status="";
		if (!file.isEmpty()) {
			try {
			byte[] bytes = file.getBytes();
			File dir = new File(UPLOADED_FOLDER)	
			if (!dir.exists())
					dir.mkdirs();
                                
					
                File uploadFile = new File(dir.getAbsolutePath()+ File.separator + 
                                         file.getOriginalFilename());
                BufferedOutputStream outputStream = new BufferedOutputStream(
                                new FileOutputStream(uploadFile));
				outputStream.write(bytes);
				outputStream.close();

				status = status +  " Successfully uploaded file=" + file.getOriginalFilename();
			} catch (Exception e) {
				status = status +  "Failed to upload " + file.getOriginalFilename()+ " " + e.getMessage();
			}
		}
return status; 
	}

	@RequestMapping(value = "/uploadMultipleFiles ", method =RequestMethod.POST)
public  String uploadMultipleFiles(@RequestParam("description") String[] descriptions,@RequestParam("file") MultipartFile[] files) {

		if (files.length != descriptions.length)
			return "Mismatching no of files are equal to description";

		String status = "";
        File dir = new File(UPLOADED_FOLDER)
		for (int i = 0; i < files.length; i++) {
			MultipartFile file = files[i];
			String description = descriptions[i];
			try {
				byte[] bytes = file.getBytes();

				if (!dir.exists())
					dir.mkdirs();

				File uploadFile = new File(dir.getAbsolutePath()
						+ File.separator + file.getOriginalFilename());
				BufferedOutputStream outputStream = new BufferedOutputStream(
						new FileOutputStream(uploadFile));
				outputStream.write(bytes);
				outputStream.close();

				status = status + "You successfully uploaded file=" + file.getOriginalFilename();
			} catch (Exception e) {
				status = status + "Failed to upload " + file.getOriginalFilename()+ " " + e.getMessage();
			}
		}
		return status;
	}
}