2021.01.22 일지
File Upload/Download
pom.xml
pom.xml에 하단 xml을 추가해준다.
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>servlet-context.xml
servlet-context.xml에 하단 xml을 추가해준다.
<!-- servlet-context : 파일 업로드용 resolver -->
<beans:bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<beans:property name="defaultEncoding" value="UTF-8" />
<beans:property name="maxUploadSize" value="10485760" />
<beans:property name="maxUploadSizePerFile" value="2097152"/>
<beans:property name="maxInMemorySize" value="10485756"/>
</beans:bean>
<!-- servlet-context : 파일 다운로드 -->
<beans:bean id="fileDownloadView" class="soo.md.filesetting.FileDownloadView" />
<beans:bean id="fileViewResolver" class="org.springframework.web.servlet.view.BeanNameViewResolver">
<beans:property name="order" value="0" />
</beans:bean>controller
peachy.md.controller에FileController.java를 만들어준다.
package peachy.md.controller;
import java.io.File;
import java.util.ArrayList;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;
import lombok.AllArgsConstructor;
import lombok.extern.log4j.Log4j;
import peachy.md.filesetting.Path;
import peachy.md.service.FileUploadService;
@Log4j
@Controller
@AllArgsConstructor
@RequestMapping("file")
public class FileController {
private FileUploadService service; //Spring 4.3 ~: AutoInjection (with @AllArgsConstructor )
@GetMapping("form.do")
public String formFu() {
return "file/form";
}
@PostMapping("upload.do")
public String upload(@RequestParam String name, @RequestParam MultipartFile file) {
log.info("#name: " + name + ", file: " + file);
String ofname = file.getOriginalFilename();
if(ofname != null) ofname = ofname.trim();
if(ofname.length() != 0) {
String url = service.saveStore(file);
}
return "redirect:list.do";
}
@GetMapping("list.do")
public ModelAndView fileList() {
File fStore = new File(Path.FILE_STORE);
if(!fStore.exists()) fStore.mkdirs();
File files[] = fStore.listFiles();
return new ModelAndView("file/list", "files", files);
}
@GetMapping("del.do")
public String del(@RequestParam String fname) {
File file = new File(Path.FILE_STORE, fname);
if(file.exists()) file.delete();
return "redirect:list.do";
}
@GetMapping("form_mt.do")
public String formFuMt() {
return "file/form_mt";
}
@PostMapping("upload_mt.do")
public String uploadMt(@RequestParam ArrayList<MultipartFile> files) {
for(MultipartFile file: files) {
String ofname = file.getOriginalFilename();
if(ofname != null) ofname = ofname.trim();
if(ofname.length() != 0) {
String url = service.saveStore(file);
}
}
return "redirect:list.do";
}
@GetMapping("download.do")
public ModelAndView download(@RequestParam String fname) {
File file = new File(Path.FILE_STORE, fname);
if(file.exists()) {
return new ModelAndView("fileDownloadView", "downloadFile", file);
}else {
return new ModelAndView("redirect:list.do");
}
}
}peachy.md.filesetting에FileDownloadView.java생성해준다.
package peachy.md.filesetting;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.servlet.view.AbstractView;
import lombok.extern.log4j.Log4j;
@Log4j
public class FileDownloadView extends AbstractView { // View역할을 하는 JSP같은 것이다.
public FileDownloadView() {
setContentType("application/download;charset=utf-8");
}
@Override
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
HttpServletResponse response) throws Exception {
File file = (File)model.get("downloadFile");
response.setContentType(getContentType());
response.setContentLength((int)file.length());
String value = "attachment; filename="+ java.net.URLEncoder.encode(file.getName(), "utf-8") +";";
response.setHeader("Content-Disposition", value);
response.setHeader("Content-Transfer-Encoding", "binary");
OutputStream os = response.getOutputStream();
FileInputStream fis = null;
try {
fis = new FileInputStream(file);
FileCopyUtils.copy(fis, os);
os.flush();
}catch(IOException ie) {
log.info("FileDownloadView ie: " + ie);
}finally {
if(fis != null) fis.close();
if(os != null) os.close();
}
}
}peachy.md.filesetting에Path.java생성해준다.
package peachy.md.filesetting;
public class Path {
public static final String FILE_STORE = "C:/spring/tmp/";
}peachy.md.service에서FileUploadService.java를 만들어준다.
package peachy.md.service;
import org.springframework.web.multipart.MultipartFile;
public interface FileUploadService {
String saveStore(MultipartFile file);
boolean writeFile(MultipartFile file, String saveFileName);
}peachy.md.service에서FileUploadServiceImpl.java를 만들어준다.
package peachy.md.service;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import lombok.extern.log4j.Log4j;
import peachy.md.filesetting.Path;
@Log4j
@Service
public class FileUploadServiceImpl implements FileUploadService {
@Override
public String saveStore(MultipartFile file) {
String ofname = file.getOriginalFilename();
int idx = ofname.lastIndexOf(".");
String ofheader = ofname.substring(0, idx);
String ext = ofname.substring(idx);
long ms = System.currentTimeMillis();
StringBuilder sb = new StringBuilder();
sb.append(ofheader);
sb.append("_");
sb.append(ms);
sb.append(ext);
String saveFileName = sb.toString();
long fsize = file.getSize();
log.info("#ofname: " + ofname + ", saveFileName: " + saveFileName + ", fsize: "+fsize);
boolean flag = writeFile(file, saveFileName);
if(flag) {
log.info("#업로드 성공");
}else {
log.info("#업로드 실패");
}
return Path.FILE_STORE + saveFileName;
}
@Override
public boolean writeFile(MultipartFile file, String saveFileName) {
File rDir = new File(Path.FILE_STORE);
if(!rDir.exists()) rDir.mkdirs();
FileOutputStream fos = null;
try {
byte data[] = file.getBytes();
fos = new FileOutputStream(Path.FILE_STORE+saveFileName);
fos.write(data);
fos.flush();
return true;
}catch(IOException ie) {
return false;
}finally {
try {
if(fos != null) fos.close();
}catch(IOException ie) {}
}
}
}jsp
views/file페이지에 추가해줄 jsp들이다.
form_mt.jsp
<%@ page contentType="text/html; charset=utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Fileupload Form Multi</title>
<style>
a{text-decoration:none}
</style>
</head>
<body style="text-align:center">
<h1>Fileupload Form Multi</h1>
<form action="/file/upload_mt.do" method="post" enctype="multipart/form-data">
<div>
<input type='file' name='files'>
</div>
<div>
<input type='file' name='files'>
</div>
<div>
<input type='file' name='files'>
</div>
<div>
<input type='file' name='files'>
</div>
<div>
<input type='file' name='files'>
</div>
<div>
<input type='submit'>
</div>
</form>
</body>
</html>form.jsp
<%@ page contentType="text/html; charset=utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>File upload Form</title>
<style>
a{text-decoration:none}
</style>
</head>
<body style="text-align:center">
<h1>File upload Form</h1>
<form action="/file/upload.do" method="post" enctype="multipart/form-data">
이름: <input name="name"><br/>
파일: <input type='file' name='file'><br/>
<input type='submit' value="전송">
</form>
</body>
</html>list.jsp
<%@ page contentType="text/html; charset=utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>list.jsp</title>
<style>
a{text-decoration:none}
table{
width:50%
}
table,th,td {
border : 1px solid black;
border-collapse: collapse;
}
th,td {
padding: 5px;
}
</style>
</head>
<body style="text-align:center">
<h1>FileUpload with Spring5</h1>
<a href="form.do">업로드 폼</a>
<a href="form_mt.do">업로드 폼(멀티)</a>
<a href="../">인덱스</a>
<br/><br/>
<center>
<table>
<tr>
<th>이름</th>
<th>크기</th>
<th>삭제</th>
</tr>
<c:if test="${empty files}">
<tr>
<td align="center" colspan="3">파일이 하나도 없음</td>
</tr>
</c:if>
<c:forEach items="${files}" var="file">
<tr>
<td align="center">
<a href="download.do?fname=${file.name}">${file.name}</a>
</td>
<td align="center">${file.length()}</td>
<td align="center">
<a href="del.do?fname=${file.name}">삭제</a>
</td>
</tr>
</c:forEach>
</table>
</center>
</body>
</html>Author And Source
이 문제에 관하여(2021.01.22 일지), 우리는 이곳에서 더 많은 자료를 발견하고 링크를 클릭하여 보았다 https://velog.io/@peachy/study-068저자 귀속: 원작자 정보가 원작자 URL에 포함되어 있으며 저작권은 원작자 소유입니다.
우수한 개발자 콘텐츠 발견에 전념
(Collection and Share based on the CC Protocol.)
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