참고 : 🔗 MIME 타입
upload.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="upload2.do" method="post" enctype="multipart/form-data">
1. 파일 지정하기: <input type="file" name="uploadFile01"><br>
2. 파일 지정하기: <input type="file" name="uploadFile02"><br>
3. 파일 지정하기: <input type="file" name="uploadFile03"><br>
<input type="submit" value="전송">
</form>
</body>
</html>
MultiUploadServlet.java
package com.sw.controller;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import java.util.HashMap;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.oreilly.servlet.MultipartRequest;
import com.oreilly.servlet.multipart.DefaultFileRenamePolicy;
@WebServlet("/upload2.do")
public class MultiUploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public MultiUploadServlet() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html; charset=UTF-8");
PrintWriter out = response.getWriter();
HashMap<String, String> map = new HashMap<String, String>();
String savePath = "upload";
int uploadFileSizeLimit = 5 * 1024 * 1024;
String encType = "UTF-8";
ServletContext context = getServletContext();
String uploadFilePath = context.getRealPath(savePath);
try {
MultipartRequest multi = new MultipartRequest(request,
uploadFilePath, uploadFileSizeLimit, encType,
new DefaultFileRenamePolicy());
Enumeration files = multi.getFileNames();
while (files.hasMoreElements()) {
String file = (String) files.nextElement();
String file_name = multi.getFilesystemName(file);
String ori_file_name = multi.getOriginalFileName(file);
map.put(file_name,ori_file_name);
}
request.setAttribute("map", map);
} catch (Exception e) {
System.out.print("예외 발생 : " + e);
}
RequestDispatcher dispatcher = request.getRequestDispatcher("fileList.jsp");
dispatcher.forward(request, response);
}
}
file_down.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.io.*" %>
<%@ page import="com.oreilly.servlet.ServletUtils"%>
<%
String fileName = request.getParameter("file_name");
String savePath = "upload";
ServletContext context = getServletContext();
String sDownloadPath = context.getRealPath(savePath);
String sFilePath = sDownloadPath + "\\" + fileName;
byte b[] = new byte[4096];
File oFile = new File(sFilePath);
FileInputStream in = new FileInputStream(sFilePath);
String sMimeType = getServletContext().getMimeType(sFilePath);
System.out.println("sMimeType>>>"+sMimeType );
if(sMimeType == null) sMimeType = "application/octet-stream";
response.setContentType(sMimeType);
String sEncoding = new String(fileName.getBytes("UTF-8"), "ISO-8859-1");
response.setHeader("Content-Disposition", "attachment; filename= " + sEncoding);
ServletOutputStream out2 = response.getOutputStream();
int numRead;
while((numRead = in.read(b, 0, b.length)) != -1) {
out2.write(b, 0, numRead);
}
out2.flush();
out2.close();
in.close();
%>
fileList.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.util.HashMap" %>
<%@ page import="java.util.Iterator" %>
<%@ page import="java.util.Map" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>업로드 파일 리스트</h1>
<%
Map<String , String> map = (HashMap<String , String>)request.getAttribute("map");
Iterator<String> keys = map.keySet().iterator();
while(keys.hasNext()){
String systemfilename = keys.next();
String orginfilename = map.get(systemfilename);
%>
<p>
<a href="file_down.jsp?file_name=<%=systemfilename %>"><%=orginfilename %></a>
</p>
<% }%>
</body>
</html>
