package com.company.springapp;

import java.io.Serializable;

import org.springframework.web.multipart.MultipartFile;

public class UploadCommand implements Serializable
{
  private MultipartFile document1;
  private MultipartFile document2;
  private MultipartFile document3;
  private MultipartFile document4;

  public MultipartFile getDocument1() {
    return document1;
  }

  public void setDocument1(MultipartFile document1) {
    this.document1 = document1;
  }

  public MultipartFile getDocument2() {
    return document2;
  }

  public void setDocument2(MultipartFile document2) {
    this.document2 = document2;
  }

  public MultipartFile getDocument3() {
    return document3;
  }

  public void setDocument3(MultipartFile document3) {
    this.document3 = document3;
  }

  public MultipartFile getDocument4() {
    return document4;
  }

  public void setDocument4(MultipartFile document4) {
    this.document4 = document4;
  }
}

package com.company.springapp;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping(value = "/upload")
public class UploadController {
  private static final Logger logger = Logger
      .getLogger(UploadController.class);

  private String uploadFolderPath;

  public String getUploadFolderPath() {
    return uploadFolderPath;
  }

  public void setUploadFolderPath(String uploadFolderPath) {
    logger.info(uploadFolderPath);
    this.uploadFolderPath = uploadFolderPath;
  }

  @RequestMapping(value = "/form")
  protected ModelAndView loginformHandler(@ModelAttribute("command")
  UploadCommand command) throws Exception {
    logger.info("start");
    ModelAndView mav = new ModelAndView();
    try {
      mav.setViewName("upload");
      mav.addObject(command);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return mav;
  }

  @RequestMapping(value = "/save")
  protected ModelAndView saveHandler(@ModelAttribute("command")
  UploadCommand command) throws Exception {
    logger.info("start::" + BeanUtils.describe(command));
    ModelAndView mav = new ModelAndView();
    try {
      writeFile((UploadCommand) command);
      mav.setViewName("uploadSuccess");
    } catch (Exception e) {
      e.printStackTrace();
    }
    return mav;
  }

  private void writeFile(UploadCommand bean) throws Exception {
    String filePath = getUploadFolderPath() + getDateyyyyMMdd_HHmmssSS();

    try {
      logger.info("Start file write");
      if (bean.getDocument1() != null
          && bean.getDocument1().getSize() > 0) {
        bean.getDocument1().transferTo(
            new File(filePath
                + "_1"
                + getFileExt(bean.getDocument1()
                    .getOriginalFilename())));
      }
      if (bean.getDocument2() != null
          && bean.getDocument2().getSize() > 0) {
        bean.getDocument2().transferTo(
            new File(filePath
                + "_2"
                + getFileExt(bean.getDocument2()
                    .getOriginalFilename())));
      }
      if (bean.getDocument3() != null
          && bean.getDocument3().getSize() > 0) {
        bean.getDocument3().transferTo(
            new File(filePath
                + "_3"
                + getFileExt(bean.getDocument3()
                    .getOriginalFilename())));
      }
      if (bean.getDocument4() != null
          && bean.getDocument4().getSize() > 0) {
        bean.getDocument4().transferTo(
            new File(filePath
                + "_4"
                + getFileExt(bean.getDocument4()
                    .getOriginalFilename())));
      }
      logger.info("End file write");
    } catch (Exception e) {
      logger.error(e, e);
    }
  }

  private static String getDateyyyyMMdd_HHmmssSS() {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmssSS");
    return sdf.format(new Date(System.currentTimeMillis()));
  }

  private static String getFileExt(String filePath) {
    return filePath.substring(filePath.lastIndexOf("."), filePath.length());
  }
}

<%
String ctx = request.getContextPath();
%>
<html>
<head>
<title>/WEB-INF/jsp/upload.jsp</title>
</head>

<body>
<form name="uploadDocs" method="post" action="<%=ctx%>/upload/save"
  enctype="multipart/form-data">
<table width="100%" border="0" cellpadding="0" cellspacing="0"
  bgcolor="#FFFFFF">
  <tr>
    <td><input type="file" value="Upload Docs1" name="document1" />
    </td>
  </tr>
  <tr>
    <td><input type="file" value="Upload Docs2" name="document2" />
    </td>
  </tr>
  <tr>
    <td><input type="file" value="Upload Docs3" name="document3" />
    </td>
  </tr>
  <tr>
    <td><input type="file" value="Upload Docs4" name="document4" />
    </td>
  </tr>
  <tr>
    <td><input type="submit" value="UploadDocs" name="uploaddocs" />
    </td>
  </tr>
</table>
</form>
</body>
</html>

<%
String ctx = request.getContextPath();
%>
<html>
<head>
<title>/WEB-INF/jsp/uploadSuccess.jsp</title>
</head>

<body onload="">

<form name="upload" method="post" action="upload">
<table width="100%" border="0" cellpadding="0" cellspacing="0"
  bgcolor="#FFFFFF">
  <tr>
    <td>Upload Successful</td>
  </tr>
</table>
</form>
</body>
</html>

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