πŸ’» Programming/JSP

[JSP] File Upload ( 파일 μ—…λ‘œλ“œ )

파일 μ—…λ‘œλ“œ 폼 λ§Œλ“€κΈ°

 

λ‹€μŒμ— λ³Ό HTML μ½”λ“œκ°€ λ°”λ‘œ 파일 μ—…λ‘œλ“œ νΌμž…λ‹ˆλ‹€. μ—¬κΈ°μ„œ μ€‘μš”ν•œ 점을 λͺ‡κ°€μ§€ 짚고 λ„˜μ–΄κ°€κ² μŠ΅λ‹ˆλ‹€.

  • <form>의 method μ†μ„±μ€ POST μž…λ‹ˆλ‹€. 

  • <form>의 enctype μ†μ„±μ€ multipart/form-data μž…λ‹ˆλ‹€. 

  • <form>의 action μ†μ„±μ€ λ°±μ—”λ“œ μͺ½μ—μ„œ 파일 μ—…λ‘œλ“œλ₯Ό 핸듀링할 JSP νŒŒμΌμž…λ‹ˆλ‹€. μ•„λž˜ μ˜ˆμ œλŠ” UploadFile.jspλ₯Ό μ‚¬μš©ν–ˆμŠ΅λ‹ˆλ‹€.

  • ν•œκ°œμ˜ 파일만 μ—…λ‘œλ“œ ν•  λ•ŒλŠ”  <input .../> νƒœκ·Έλ₯Ό type="file" 속성고 ν•¨κ»˜ μ‚¬μš©ν•©λ‹ˆλ‹€. λ©€ν‹°ν”Œ νŒŒμΌμ—…λ‘œλ”©μ„ κ΅¬ν˜„ν•˜λ €λ©΄ ν•˜λ‚˜ μ΄μƒμ˜ inputνƒœκ·Έλ₯Ό 각기 λ‹€λ₯Έ name으둜 μ„€μ •ν•΄μ€˜μ•Ό ν•©λ‹ˆλ‹€.  

 
<html>
<head>
<title>File Uploading Form</title>
</head>
<body>
<h3>File Upload:</h3>
Select a file to upload: <br />
<form action="UploadServlet" method="post"
                        enctype="multipart/form-data">
<input type="file" name="file" size="50" />
<br />
<input type="submit" value="Upload File" />
</form>
</body>
</html>

μœ„ μ†ŒμŠ€λ₯Ό UploadFile.htm에 λ„£μ–΄μ£Όμ„Έμš”. μœ„ νŽ˜μ΄μ§€λ₯Ό 좜λ ₯해보면 μ•„λž˜μ²˜λŸΌ λ‚˜μ˜¬κ±°μ—μš”. νŒŒμΌμ„ μ—…λ‘œλ“œ ν•΄λ³΄μ„Έμš” ^___^ 참고둜 μœ„ μ½”λ“œλŠ” κ·Έλƒ₯ dummyμ½”λ“œλΌμ„œ μ‹€μ œλ‘œ νŒŒμΌμ„ μ–΄λ”˜κ°€λ‘œ μ—…λ‘œλ“œ ν•˜μ§€λŠ” μ•ŠμŠ΅λ‹ˆλ‹€. 

λ°±μ—”λ“œ JSP 슀크립트 λ§Œλ“€κΈ°

 

μš°μ„  νŒŒμΌλ“€μ΄ μ—…λ‘œλ“œλ˜μ—ˆμ„ λ•Œ 어디에 μ €μž₯될지 경둜λ₯Ό μ§€μ •ν•΄λ³Όκ²Œμš”. 경둜λ₯Ό μ§€μ •ν•˜λŠ” 방법은 μ†ŒμŠ€μ— ν•˜λ“œμ½”λ”©ν•˜λŠ” 방법도 있고 web.xmlνŒŒμΌμ— context-param νƒœκ·Έλ‚΄μ— μ§€μ •ν•΄μ£ΌλŠ” 방법도 μžˆμŠ΅λ‹ˆλ‹€.

 
<web-app>
....
<context-param> 
    <description>Location to store uploaded file</description> 
    <param-name>file-upload</param-name> 
    <param-value>
         c:\apache-tomcat-5.5.29\webapps\data\
     </param-value> 
</context-param>
....
</web-app>

μ•„λž˜λŠ” ν•œλ²ˆμ— μ—¬λŸ¬κ°œμ˜ νŒŒμΌμ„ μ—…λ‘œλ“œ ν•  수 μžˆλŠ” UploadFile.jsp의 μ†ŒμŠ€μ½”λ“œμ—μš”. μ†ŒμŠ€λΆ€ν„° 보기전에 점검해야할 것듀이 μžˆμŠ΅λ‹ˆλ‹€. 

  • μ•„λž˜ μ˜ˆμ œλŠ” FileUpload 클래슀λ₯Ό μ‚¬μš©ν•˜κΈ° λ•Œλ¬Έμ— μ΅œμ‹ λ²„μ „μ˜ commons-fileupload.x.x.jar νŒŒμΌμ„ ν΄λž˜μŠ€νŒ¨μŠ€μ— λ„£μ–΄μ£Όμ…”μ•Ό ν•©λ‹ˆλ‹€. μ—¬κΈ°μ„œ http://commons.apache.org/fileupload/ λ‹€μš΄λ‘œλ“œ λ°›μœΌμ‹€ 수 μžˆμ–΄μš”. 

  • λ˜ν•œ Commons IO λΌμ΄λΈŒλŸ¬λ¦¬λ„ ν•„μš”ν•©λ‹ˆλ‹€.  commons-io-x.x.jar νŒŒμΌ μ—­μ‹œ 클래슀 νŒ¨μŠ€μ— 섀정을 ν•΄μ£Όμ…”μ•Ό λ˜μš”. λ‹€μš΄λ‘œλ“œλŠ” http://commons.apache.org/io/.

  • μ•„λž˜ 예제λ₯Ό ν…ŒμŠ€νŠΈν•  λ•Œμ—λŠ” maxFileSize μ— μ„€μ •λœ νŒŒμΌν¬κΈ°λ³΄λ‹€ μž‘μ€ νŒŒμΌλ“€λ§Œ μ—…λ‘œλ“œκ°€ κ°€λŠ₯ν•˜λ‹΅λ‹ˆλ‹€.

  • c:\temp 와 c:\apache-tomcat-5.5.29\webapps\data 디렉토리가 μžˆλŠ”μ§€ ν™•μΈν•˜μ‹œκ³  μ—†μœΌλ©΄ μƒμ„±ν•΄μ£Όμ„Έμš”. 
     

<%@ page import="java.io.*,java.util.*, javax.servlet.*" %>
<%@ page import="javax.servlet.http.*" %>
<%@ page import="org.apache.commons.fileupload.*" %>
<%@ page import="org.apache.commons.fileupload.disk.*" %>
<%@ page import="org.apache.commons.fileupload.servlet.*" %>
<%@ page import="org.apache.commons.io.output.*" %>

<%
   File file ;
   int maxFileSize = 5000 * 1024;
   int maxMemSize = 5000 * 1024;
   ServletContext context = pageContext.getServletContext();
   String filePath = context.getInitParameter("file-upload");

   // Verify the content type
   String contentType = request.getContentType();
   if ((contentType.indexOf("multipart/form-data") >= 0)) {

      DiskFileItemFactory factory = new DiskFileItemFactory();
      // maximum size that will be stored in memory
      factory.setSizeThreshold(maxMemSize);
      // Location to save data that is larger than maxMemSize.
      factory.setRepository(new File("c:\\temp"));

      // Create a new file upload handler
      ServletFileUpload upload = new ServletFileUpload(factory);
      // maximum file size to be uploaded.
      upload.setSizeMax( maxFileSize );
      try{ 
         // Parse the request to get file items.
         List fileItems = upload.parseRequest(request);

         // Process the uploaded file items
         Iterator i = fileItems.iterator();

         out.println("<html>");
         out.println("<head>");
         out.println("<title>JSP File upload</title>");  
         out.println("</head>");
         out.println("<body>");
         while ( i.hasNext () ) 
         {
            FileItem fi = (FileItem)i.next();
            if ( !fi.isFormField () ) 
            {
            // Get the uploaded file parameters
            String fieldName = fi.getFieldName();
            String fileName = fi.getName();
            boolean isInMemory = fi.isInMemory();
            long sizeInBytes = fi.getSize();
            // Write the file
            if( fileName.lastIndexOf("\\") >= 0 ){
            file = new File( filePath + 
            fileName.substring( fileName.lastIndexOf("\\"))) ;
            }else{
            file = new File( filePath + 
            fileName.substring(fileName.lastIndexOf("\\")+1)) ;
            }
            fi.write( file ) ;
            out.println("Uploaded Filename: " + filePath + 
            fileName + "<br>");
            }
         }
         out.println("</body>");
         out.println("</html>");
      }catch(Exception ex) {
         System.out.println(ex);
      }
   }else{
      out.println("<html>");
      out.println("<head>");
      out.println("<title>Servlet upload</title>");  
      out.println("</head>");
      out.println("<body>");
      out.println("<p>No file uploaded</p>"); 
      out.println("</body>");
      out.println("</html>");
   }
%>

이제 http://localhost:8080/UploadFile.htm μ— μ ‘μ†ν•΄μ„œ ν…ŒμŠ€νŠΈ ν•΄λ³ΌκΉŒμš”? 

μ œλŒ€λ‘œ μž‘λ™ν•œλ‹€λ©΄  c:\apache-tomcat-5.5.29\webapps\data\ 디렉토리에 파일이 μ—…λ‘œλ“œ λ˜μ–΄μžˆμ„ κ±°μ—μš”~ 

 

 

 

Reference : http://www.tutorialspoint.com/jsp/jsp_file_uploading.htm 

 

 

μ €μž‘μžν‘œμ‹œ λΉ„μ˜λ¦¬ λ³€κ²½κΈˆμ§€

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