Webpage NEVER allow the to access any local files. Means if you write <img src="c:\ImageFolder\Binod.jpg"/> in the jsp file, it will NOT work. (It can work only in some editor, but it will not work using internet explorer)
first.jsp
<html>
<head>
<title>Binod Show Image</title>
</head>
<body>
<h1> BINOD FROM IMAGE SHOW PROJECT </h1>
<img src="c:\ImageFolder\Binod.jpg" width="100" height="100"/></body>
</html>
It will not work.
Then how to show Image on JSP page from local computer drive.
SOLUTION: You have to use servlet to show image on jsp file
1. Servlet SendImage.java
2. first.jsp
3. Change in web.xml
SendImage.java
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.ResourceBundle;
import java.util.StringTokenizer;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SendImage extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
static final long serialVersionUID = 1L;
String image_name = "";
ResourceBundle props = null;
String filePath = "";
private static final int BUFSIZE = 100;
private ServletContext servletContext;
public SendImage() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("FROM SERVLET");
sendImage(getServletContext(), request, response);
}
public void sendImage(ServletContext servletContext,
HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.servletContext = servletContext;
String reqUrl = request.getRequestURL().toString();
StringTokenizer tokens = new StringTokenizer(reqUrl, "/");
int noOfTokens = tokens.countTokens();
String tokensString[] = new String[noOfTokens];
int count = 0;
while (tokens.hasMoreElements()) {
tokensString[count++] = (String) tokens.nextToken();
}
String folderName = tokensString[noOfTokens - 2];
image_name = tokensString[noOfTokens - 1];
filePath = "/" + folderName + "/" + image_name;
String fullFilePath = "c:/ImageFolder" + filePath;
System.out.println("FULL PATH :: "+fullFilePath);
// doShowImageOnPage(fullFilePath, request, response);
doDownload(fullFilePath, request, response);
}
private void doShowImageOnPage(String fullFilePath,
HttpServletRequest request, HttpServletResponse response)
throws IOException {
response.reset();
response.setHeader("Content-Disposition", "inline");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Expires", "0");
response.setContentType("image/tiff");
byte[] image = getImage(fullFilePath);
OutputStream outputStream = response.getOutputStream();
outputStream.write(image);
outputStream.close();
}
private void doDownload(String filePath, HttpServletRequest request,
HttpServletResponse response) throws IOException {
File fileName = new File(filePath);
int length = 0;
ServletOutputStream outputStream = response.getOutputStream();
// ServletContext context = getServletConfig().getServletContext();
ServletContext context = servletContext;
String mimetype = context.getMimeType(filePath);
response.setContentType((mimetype != null) ? mimetype
: "application/octet-stream");
response.setContentLength((int) fileName.length());
response.setHeader("Content-Disposition", "attachment; filename=\""
+ image_name + "\"");
byte[] bbuf = new byte[BUFSIZE];
DataInputStream in = new DataInputStream(new FileInputStream(fileName));
while ((in != null) && ((length = in.read(bbuf)) != -1)) {
outputStream.write(bbuf, 0, length);
}
in.close();
outputStream.flush();
outputStream.close();
}
private byte[] getImage(String filename) {
byte[] result = null;
String fileLocation = filename;
File f = new File(fileLocation);
result = new byte[(int)f.length()];
try {
FileInputStream in = new FileInputStream(fileLocation);
in.read(result);
}
catch(Exception ex) {
System.out.println("GET IMAGE PROBLEM :: "+ex);
ex.printStackTrace();
}
return result;
}
}
2. first.jsp
<html><head><title>Binod Show Image</title></head><body><h1> BINOD FROM IMAGE SHOW PROJECT </h1>
<img src="http://localhost:8080/ImageShow/SendImage/12/Binod.jpg" width="100" height="100"/>
</body></html>
3. Update in web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd%22>
<display-name> ImageShow</display-name>
<servlet>
<description> </description> <display-name> SendImage</display-name>
<servlet-name>SendImage</servlet-name>
<servlet-class> SendImage</servlet-class>
</servlet> <servlet-mapping> <servlet-name>SendImage</servlet-name>
<url-pattern>/SendImage/*</url-pattern> </servlet-mapping>
</web-app>
use this URL, now its work. :)
http://localhost:8080/ImageShow/first.jsp
Wednesday, February 11, 2009
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