Java tutorial
package com.insurance.manage; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.sql.Connection; import java.sql.SQLException; import java.sql.Statement; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Enumeration; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.naming.NamingException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import net.sf.jasperreports.engine.JRException; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import com.insurance.entity.Customer; import com.insurance.entity.CustomerPage; import com.standard.STDException; import com.standard.util.StringUtil; public class UploadFile extends HttpServlet { public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); String pictype = (String) session.getAttribute("pictype"); if ("license".equalsIgnoreCase(pictype)) { this.uploadLicense(request, response); } else if ("fire".equalsIgnoreCase(pictype)) { this.uploadFire(request, response); } else if ("life".equalsIgnoreCase(pictype)) { this.uploadLife(request, response); } } private void uploadLicense(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // boolean isMultipart = ServletFileUpload.isMultipartContent(request); // Create a factory for disk-based file items String custId = null; String year = null; String license = null; CustomerManager cManage = new CustomerManager(); DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(1 * 1024 * 1024); //1 MB factory.setRepository(new File("temp")); // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(factory); HttpSession session = request.getSession(); // System.out.println("eCust : "+session.getAttribute("eCust")); // if (session.getAttribute("eCust")!=null) { // Customer cEntity = (Customer)request.getAttribute("eCust"); // System.out.println("CustId : "+cEntity.getName()); // } // Parse the request // System.out.println("--------- Uploading --------------"); try { List /* FileItem */ items = upload.parseRequest(request); // Process the uploaded items Iterator iter = items.iterator(); File fi = null; File file = null; Calendar calendar = Calendar.getInstance(); DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); String fileName = df.format(calendar.getTime()) + ".jpg"; while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (item.isFormField()) { // System.out.println(item.getFieldName()+" : "+item.getName()+" : "+item.getString()+" : "+item.getContentType()); if (item.getFieldName().equals("custId") && !item.getString().equals("")) { custId = item.getString(); // System.out.println("custId : "+custId); } if (item.getFieldName().equals("year") && !item.getString().equals("")) { year = item.getString(); // System.out.println("year : "+year); } if (item.getFieldName().equals("license") && !item.getString().equals("")) { license = (String) session.getAttribute(item.getString()); // System.out.println("license : "+license+" : "+session.getAttribute(item.getString())); } } else { // Handle Uploaded files. // System.out.println("Handle Uploaded files."); if (item.getFieldName().equals("vat") && !item.getName().equals("")) { fi = new File(item.getName()); File uploadedFile = new File( getServletContext().getRealPath("/images/license/vat/" + year + fileName)); item.write(uploadedFile); cManage.updatePicture(custId, year, license, "vatpic", year + fileName); } if (item.getFieldName().equals("car") && !item.getName().equals("")) { fi = new File(item.getName()); File uploadedFile = new File( getServletContext().getRealPath("/images/license/car/" + year + fileName)); item.write(uploadedFile); cManage.updatePicture(custId, year, license, "carpic", year + fileName); } if (item.getFieldName().equals("act") && !item.getName().equals("")) { fi = new File(item.getName()); File uploadedFile = new File( getServletContext().getRealPath("/images/license/act/" + year + fileName)); item.write(uploadedFile); cManage.updatePicture(custId, year, license, "actpic", year + fileName); } if (item.getFieldName().equals("chk") && !item.getName().equals("")) { fi = new File(item.getName()); File uploadedFile = new File( getServletContext().getRealPath("/images/license/chk/" + year + fileName)); item.write(uploadedFile); cManage.updatePicture(custId, year, license, "chkpic", year + fileName); } } } } catch (FileUploadException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } request.setAttribute("url", "setup/CustomerMultiMT.jsp?action=search&custId=" + custId); request.setAttribute("msg", "!!!Uploading !!!"); getServletConfig().getServletContext().getRequestDispatcher("/Reload.jsp").forward(request, response); } private void uploadFire(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // boolean isMultipart = ServletFileUpload.isMultipartContent(request); // Create a factory for disk-based file items String custId = null; String year = null; String license = null; CustomerManager cManage = new CustomerManager(); DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(1 * 1024 * 1024); //1 MB factory.setRepository(new File("temp")); // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(factory); HttpSession session = request.getSession(); // Parse the request // System.out.println("--------- Uploading --------------"); try { List /* FileItem */ items = upload.parseRequest(request); // Process the uploaded items Iterator iter = items.iterator(); File fi = null; File file = null; // Calendar calendar = Calendar.getInstance(); // DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); // String fileName = df.format(calendar.getTime()) + ".jpg"; while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (item.isFormField()) { // System.out.println(item.getFieldName()+" : "+item.getName()+" : "+item.getString()+" : "+item.getContentType()); if (item.getFieldName().equals("custId") && !item.getString().equals("")) { custId = item.getString(); System.out.println("custId : " + custId); } if (item.getFieldName().equals("year") && !item.getString().equals("")) { year = item.getString(); System.out.println("year : " + year); } } else { // Handle Uploaded files. // System.out.println("Handle Uploaded files."); String fileName = year + custId + ".jpg"; if (item.getFieldName().equals("fire") && !item.getName().equals("")) { fi = new File(item.getName()); File uploadedFile = new File(getServletContext().getRealPath("/images/fire/" + fileName)); item.write(uploadedFile); cManage.updatePicture(custId, year, license, "firepic", fileName); } } } } catch (FileUploadException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } request.setAttribute("url", "setup/CustomerMultiMT.jsp?action=search&custId=" + custId); request.setAttribute("msg", "!!!Uploading !!!"); getServletConfig().getServletContext().getRequestDispatcher("/Reload.jsp").forward(request, response); } private void uploadLife(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // boolean isMultipart = ServletFileUpload.isMultipartContent(request); // Create a factory for disk-based file items String custId = null; String year = null; String license = null; CustomerManager cManage = new CustomerManager(); DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(1 * 1024 * 1024); //1 MB factory.setRepository(new File("temp")); // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(factory); HttpSession session = request.getSession(); // Parse the request // System.out.println("--------- Uploading --------------"); try { List /* FileItem */ items = upload.parseRequest(request); // Process the uploaded items Iterator iter = items.iterator(); File fi = null; File file = null; // Calendar calendar = Calendar.getInstance(); // DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); // String fileName = df.format(calendar.getTime()) + ".jpg"; while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (item.isFormField()) { // System.out.println(item.getFieldName()+" : "+item.getName()+" : "+item.getString()+" : "+item.getContentType()); if (item.getFieldName().equals("custId") && !item.getString().equals("")) { custId = item.getString(); System.out.println("custId : " + custId); } if (item.getFieldName().equals("year") && !item.getString().equals("")) { year = item.getString(); System.out.println("year : " + year); } } else { // Handle Uploaded files. // System.out.println("Handle Uploaded files."); String fileName = year + custId + ".jpg"; if (item.getFieldName().equals("life") && !item.getName().equals("")) { fi = new File(item.getName()); File uploadedFile = new File(getServletContext().getRealPath("/images/life/" + fileName)); item.write(uploadedFile); cManage.updatePicture(custId, year, license, "lifepic", fileName); } } } } catch (FileUploadException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } request.setAttribute("url", "setup/CustomerMultiMT.jsp?action=search&custId=" + custId); request.setAttribute("msg", "!!!Uploading !!!"); getServletConfig().getServletContext().getRequestDispatcher("/Reload.jsp").forward(request, response); } } // the above code represents for uploading file and images using java. download the file the folliwing code ileInputStream fis = null; String location=getLocation(locationKey); if(!location.endsWith(" ")) location=location+" "; int index=fileName.lastIndexOf('.'); String docType=fileName.substring(index+1,fileName.length()); String docName=fileName.substring(0,index); try { fis = new FileInputStream(location+fileName); int noOfBytes = fis.available(); byte[] dataBytes = new byte[noOfBytes]; fis.read(dataBytes); writeToServletOutputStream(response,docType,docName,dataBytes); } catch (FileNotFoundException f) { } finally { if(fis != null) { fis.close(); } } for image downloading u have u have to use this data FileInputStream fis = null; byte[] dataBytes=null; try { fis = new FileInputStream(filePath); int noOfBytes = fis.available(); dataBytes = new byte[noOfBytes]; fis.read(dataBytes); } catch (FileNotFoundException f) { } finally { if(fis != null) { fis.close(); } } return dataBytes; for image downloading the bytes that are returned that has to be kept request.getSession().setAttribute("imageData",CommonUtils.getImageData(request,imageLoc)); keep that in session attribute in java class access that session attribute in jsp page1 i used the following code picture.jsp file another file in this u have to write the following code dynamically the code is <% ServletOutputStream sos=null; byte[] baos = (byte[])session.getAttribute("imageData"); try { if(baos!=null) { response.setContentType("image/gif"); sos= response.getOutputStream(); sos.write(baos); System.out.println("inside the if block in picture jsp"); } sos.flush(); } catch(Exception e) { e.printStackTrace(); } %>}