spring 전자 정부 파일이미지

spring 전자 정부 파일이미지

package egovframework.com.cmm.web;

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;

import egovframework.com.cmm.SessionVO;
import egovframework.com.cmm.service.EgovFileMngService;
import egovframework.com.cmm.service.FileVO;

/**
 * @Class Name : EgovImageProcessController.java
 * @Description : 
 * @Modification Information
 *
 *    수정일       수정자         수정내용
 *    -------        -------     -------------------
 *    2009. 4. 2.     
 *    2011.08.31.             경량환경 템플릿 커스터마이징버전 생성
 *
 * @author 공통 서비스 개발팀 이삼섭
 * @since 2009. 4. 2.
 * @version
 * @see
 *
 */
@SuppressWarnings("serial")
@Controller
public class EgovImageProcessController extends HttpServlet
{

	@Resource(name = "EgovFileMngService")
	private EgovFileMngService fileService;

	Logger log = LoggerFactory.getLogger(EgovImageProcessController.class);

	/**
	 * 첨부된 이미지에 대한 미리보기 기능을 제공한다.
	 * 
	 * @param atchFileId
	 * @param fileSn
	 * @param sessionVO
	 * @param model
	 * @param response
	 * @throws Exception
	 */
	@RequestMapping("/cmm/fms/getImage.do")
	public void getImageInf(SessionVO sessionVO, ModelMap model, Map<String, Object> commandMap, HttpServletResponse response) throws Exception
	{

		//@RequestParam("atchFileId") String atchFileId,
		//@RequestParam("fileSn") String fileSn,
		String atchFileId = (String) commandMap.get("atchFileId");
		String fileSn = (String) commandMap.get("fileSn");

		FileVO vo = new FileVO();

		vo.setAtchFileId(atchFileId);
		vo.setFileSn(fileSn);

		FileVO fvo = fileService.selectFileInf(vo);

		//String fileLoaction = fvo.getFileStreCours() + fvo.getStreFileNm();

		File file = new File(fvo.getFileStreCours(), fvo.getStreFileNm());
		FileInputStream fis = null;
		new FileInputStream(file);

		BufferedInputStream in = null;
		ByteArrayOutputStream bStream = null;
		try
		{
			fis = new FileInputStream(file);
			in = new BufferedInputStream(fis);
			bStream = new ByteArrayOutputStream();
			int imgByte;
			while((imgByte = in.read()) != -1)
			{
				bStream.write(imgByte);
			}

			String type = "";

			if(fvo.getFileExtsn() != null && !"".equals(fvo.getFileExtsn()))
			{
				if("jpg".equals(fvo.getFileExtsn().toLowerCase()))
				{
					type = "image/jpeg";
				}
				else
				{
					type = "image/" + fvo.getFileExtsn().toLowerCase();
				}
				type = "image/" + fvo.getFileExtsn().toLowerCase();

			}
			else
			{
				log.debug("Image fileType is null.");
			}

			response.setHeader("Content-Type", type);
			response.setContentLength(bStream.size());

			bStream.writeTo(response.getOutputStream());

			response.getOutputStream().flush();
			response.getOutputStream().close();

		}
		catch(Exception e)
		{
			log.debug("ERROR", e);//e.printStackTrace();
		}
		finally
		{
			if(bStream != null)
			{
				try
				{
					bStream.close();
				}
				catch(Exception est)
				{
					log.debug("IGNORED: " + est.getMessage());
				}
			}
			if(in != null)
			{
				try
				{
					in.close();
				}
				catch(Exception ei)
				{
					log.debug("IGNORED: " + ei.getMessage());
				}
			}
			if(fis != null)
			{
				try
				{
					fis.close();
				}
				catch(Exception efis)
				{
					log.debug("IGNORED: " + efis.getMessage());
				}
			}
		}
	}
}

<img id="img_file" alt="파일보기링크" src="<%=request.getContextPath() %>/cmm/fms/getImage.do?atchFileId=${fileInfo.fileId}">