[Spring Boot] Spring Boot file upload example

아래 소스는 간단한 파일업로드 기능에 ajax를 추가한 간단한 예제 코드 입니다.

1. JAVA Code

 1) Controller

package kr.geun.bootStartSample.www.controller;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.http.HttpStatus;

import org.springframework.http.ResponseEntity;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.multipart.MultipartFile;

@Controller

public class FileUploadController {

    private static final Logger LOG = LoggerFactory.getLogger(FileUploadController.class);

    private final String UPLOADPATH = "C:\\temp";

    /**

     * File Upload Page

     * 

     * @return

     */

    @RequestMapping(value = "/fileupload", method = RequestMethod.GET)

    public String fileUpload() {

        return "fileupload";

    }

    /**

     * File Save

     * 

     * @param uploadfile

     * @return

     */

    @RequestMapping(value = "/fileupload", method = RequestMethod.POST)

    public ResponseEntity<?> fileUpload(@RequestParam("uploadFile") MultipartFile uploadfile) {

        

        try {

            String fileNm = uploadfile.getOriginalFilename();

            String filePath = UPLOADPATH + File.separator + fileNm;

            BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(new File(filePath)));

            stream.write(uploadfile.getBytes());

            stream.close();

        } catch (Exception e) {

            LOG.error(e.getMessage(), e);

            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);

        }

        return new ResponseEntity<>(HttpStatus.OK);

    }

}

 2) Jsp

- HTML Code(fileupload.jsp)

<%@ page language="java" contentType="text/html; charset=UTF-8"%>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>

<script src="https://code.jquery.com/jquery-1.12.0.min.js"></script>

<form id="upload_file_frm" onsubmit="return false;">

<table>

<tr>

<th>Upload File </th>

<td>

<input id="upload_file" type="file" name="uploadFile" accept="*" />

</td>

<td>

<button id="upload_file_btn">Upload Btn</button>

</td>

</tr>

<tr>

<td colspan="3" id="uload_result_msg"></td>

</tr>

</table>

</form>

- Javascript

<script type="text/javascript">

$(document).ready(function(){

$("#upload_file_btn").click(function(){

uploadFileFunc();

});

});

function uploadFileFunc(){

$.ajax({

url:"/fileupload",

type: "POST",

data: new FormData($("#upload_file_frm")[0]),

enctype: 'multipart/form-data',

        processData: false,

        contentType: false,

        cache: false,

        success: function () {

            $("#uload_result_msg").text("File Upload Success");

        },

        error: function () {

            $("#uload_result_msg").text("File Upload Error");

        }

});

}

</script>