net.sourceforge.barbecue
Class BarcodeServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          net.sourceforge.barbecue.BarcodeServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class BarcodeServlet
extends javax.servlet.http.HttpServlet

The query parameters for this servlet are:

1. data, required, example: "1234567890"
2. type, optional, examples: "Code128A", "Code128B", "Code128C", if left blank will default to Code 128 B. Note that the type here must be exactly the name of one of the createX methods on BarcodeFactory without the "create" prefix. This is case sensitive.
3. appid, required for UCC128 type, ignored for all other types - specifies the application identifier to use with the UCC128 barcode, example: "420" for a US postal service barcode
4. width, optional, in pixels
5. height, optional, in pixels
6. resolution, optional, in dpi
7. headless, optional, set to "false" to force non-headless mode for the servlet - default is "true"
8. drawText, optional and only takes effect if headless is "false", set to "false" for no text

Example URL: http://hostname:80/myapp/BarcodeServlet?data=12345&type=Code128A

Contributed by Robert Chou <rchou at users.sourceforge.net>

Author:

Robert Chou, Ian Bourke, Sean Sullivan

See Also:

Serialized Form

Constructor Summary

BarcodeServlet()

Method Summary

void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res) From HttpServlet.
void	doPost(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res) From HttpServlet.
protected Barcode	getBarcode(String type, String data, String appId, boolean checkSum) Returns the appropriate barcode for the speficied parameters.
String	getServletName() From HttpServlet.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, init, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BarcodeServlet

public BarcodeServlet()

Method Detail

getServletName

public String getServletName()

From HttpServlet.

Specified by:

getServletName in interface javax.servlet.ServletConfig

Overrides:

getServletName in class javax.servlet.GenericServlet

Returns:

The literal string 'barbecue'

doPost

public void doPost(javax.servlet.http.HttpServletRequest req,
                   javax.servlet.http.HttpServletResponse res)
            throws javax.servlet.ServletException

From HttpServlet.

Overrides:

doPost in class javax.servlet.http.HttpServlet

Parameters:

req - The servlet request

res - The servlet response

Throws:

javax.servlet.ServletException - If an error occurs during processing

doGet

public void doGet(javax.servlet.http.HttpServletRequest req,
                  javax.servlet.http.HttpServletResponse res)
           throws javax.servlet.ServletException

From HttpServlet.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

req - The servlet request

res - The servlet response

Throws:

javax.servlet.ServletException - If an error occurs during processing

getBarcode

protected Barcode getBarcode(String type,
                             String data,
                             String appId,
                             boolean checkSum)
                      throws javax.servlet.ServletException

Returns the appropriate barcode for the speficied parameters.

Parameters:

type - The barcode type

data - The data to encode

appId - The (optional) application ID - for UCC128 codes

checkSum - Flag indicating whether a checksum should be appended to the barcode - for Code 39 barcodes

Returns:

The barcode

Throws:

javax.servlet.ServletException - If required data is missing