idautomationservlet.java

著名IDAutomation公司的JAVA条码控件源码

//*****************************************************************
//
//  JAVA Source for com.idautomation.datamatrix; 4.10
//
//  Copyright, IDAutomation.com, Inc. 2000-2004.
//  All rights reserved.
//
//  http://www.IDAutomation.com/java/
//
//  NOTICE:
//  You may incorporate our Source Code in your application
//  only if you own a valid Java Developer License
//  from IDAutomation.com, Inc. and the copyright notices
//  are not removed from the source code.
//
//*****************************************************************

package com.idautomation.barcode.datamatrix;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.awt.Graphics2D.*;
import java.awt.*;

import com.idautomation.barcode.encoder.GifEncoder;

public class IDAutomationServlet extends HttpServlet
{
	private boolean debug=false;
	public void init() throws ServletException  {  }

	// MODIFY THIS FUNCTION TO CREATE THE DataMatrix USING THE request PARAMETERS
	private DataMatrix getChart (HttpServletRequest request)
	{
			DataMatrix cb=new DataMatrix();
			if (request!=null)
			{
				// You may remark these parameters out if you do not need them.
				String st = null;
				if (request.getParameter("PFMT")!=null)
				{
					st = (request.getParameter("PFMT"));
					if (st.toUpperCase().compareTo("C10X10")==0) cb.preferredFormat=cb.C10X10;
					if (st.toUpperCase().compareTo("C12X12")==0) cb.preferredFormat=cb.C12X12;
					if (st.toUpperCase().compareTo("C14X14")==0) cb.preferredFormat=cb.C14X14;
					if (st.toUpperCase().compareTo("C16X16")==0) cb.preferredFormat=cb.C16X16;
					if (st.toUpperCase().compareTo("C18X18")==0) cb.preferredFormat=cb.C18X18;
					if (st.toUpperCase().compareTo("C20X20")==0) cb.preferredFormat=cb.C20X20;
					if (st.toUpperCase().compareTo("C22X22")==0) cb.preferredFormat=cb.C22X22;
					if (st.toUpperCase().compareTo("C24X24")==0) cb.preferredFormat=cb.C24X24;
					if (st.toUpperCase().compareTo("C26X26")==0) cb.preferredFormat=cb.C26X26;
					if (st.toUpperCase().compareTo("C32X32")==0) cb.preferredFormat=cb.C32X32;
					if (st.toUpperCase().compareTo("C36X36")==0) cb.preferredFormat=cb.C36X36;
					if (st.toUpperCase().compareTo("C40X40")==0) cb.preferredFormat=cb.C40X40;
					if (st.toUpperCase().compareTo("C44X44")==0) cb.preferredFormat=cb.C44X44;
					if (st.toUpperCase().compareTo("C48X48")==0) cb.preferredFormat=cb.C48X48;
					if (st.toUpperCase().compareTo("C52X52")==0) cb.preferredFormat=cb.C52X52;
					if (st.toUpperCase().compareTo("C64X64")==0) cb.preferredFormat=cb.C64X64;
					if (st.toUpperCase().compareTo("C72X72")==0) cb.preferredFormat=cb.C72X72;
					if (st.toUpperCase().compareTo("C80X80")==0) cb.preferredFormat=cb.C80X80;
					if (st.toUpperCase().compareTo("C88X88")==0) cb.preferredFormat=cb.C88X88;
					if (st.toUpperCase().compareTo("C96X96")==0) cb.preferredFormat=cb.C96X96;
					if (st.toUpperCase().compareTo("C104X104")==0)	cb.preferredFormat=cb.C104X104;
					if (st.toUpperCase().compareTo("C120X120")==0)	cb.preferredFormat=cb.C120X120;
					if (st.toUpperCase().compareTo("C132X132")==0)	cb.preferredFormat=cb.C132X132;
					if (st.toUpperCase().compareTo("C144X144")==0)	cb.preferredFormat=cb.C144X144;
					if (st.toUpperCase().compareTo("C8X18")==0)		cb.preferredFormat=cb.C8X18;
					if (st.toUpperCase().compareTo("C8X32")==0)		cb.preferredFormat=cb.C8X32;
					if (st.toUpperCase().compareTo("C12X26")==0)	cb.preferredFormat=cb.C12X26;
					if (st.toUpperCase().compareTo("C12X36")==0)	cb.preferredFormat=cb.C12X36;
					if (st.toUpperCase().compareTo("C16X36")==0)	cb.preferredFormat=cb.C16X36;
					if (st.toUpperCase().compareTo("C16X48")==0)	cb.preferredFormat=cb.C16X48;
				}
				if (request.getParameter("MODE")!=null)
				{
					st = (request.getParameter("MODE"));
					if (st.toUpperCase().compareTo("ASCII")==0)		cb.encoding=cb.E_ASCII;
					if (st.toUpperCase().compareTo("C40")==0)		cb.encoding=cb.E_C40;
					if (st.toUpperCase().compareTo("TEXT")==0)		cb.encoding=cb.E_TEXT;
					if (st.toUpperCase().compareTo("BASE256")==0)	cb.encoding=cb.E_BASE256;
					if (st.toUpperCase().compareTo("AUTO")==0)		cb.encoding=cb.E_BASE256;
				}
				if (request.getParameter("ROTATE")!=null) cb.rotate=new Integer(request.getParameter("ROTATE")).intValue();
				if (request.getParameter("MARGIN")!=null) cb.marginCM=new Double(request.getParameter("MARGIN")).doubleValue();
				if (request.getParameter("X")!=null) cb.X=new Double(request.getParameter("X")).doubleValue();
				if (request.getParameter("PT")!=null) cb.processTilde=(request.getParameter("PT").compareTo("Y")==0);
				if (request.getParameter("BARCODE")!=null)
				{
					cb.code=request.getParameter("BARCODE");
				}
				else
				{
					cb.code="NO DATA TO ENCODE";
				}
			}
			else
			{
				cb.code="NO DATA TO ENCODE";
			}
			return cb;

	}

	// Handle a request
	// 1. create DataMatrix
	// 2. draw DataMatrix in a Buffered Image
	// 3. encode image as GIF or JPEG and send it to the browser
	public void doGet (HttpServletRequest request,
	HttpServletResponse response)
	throws ServletException, IOException
	{
		PrintWriter		out;
		ServletOutputStream outb;
		String encode="jpeg";
		if (request!=null)
		{
			if (request.getParameter("FORMAT")!=null)  encode=request.getParameter("FORMAT").toLowerCase();
			if (encode.compareTo("gif")!=0) encode="jpeg";
		}
		response.setContentType("image/"+encode);
		outb=response.getOutputStream();
		// avoid caching in browser
		response.setHeader ("Pragma", "no-cache");
		response.setHeader ("Cache-Control", "no-cache");
		response.setDateHeader ("Expires",0);
		try
		{
			// Create buffer
			//the default height and width if not specified.
			int w=80;
			int h=80;
			// get DataMatrix
			DataMatrix cb=getChart(request);
			if ((request!=null) && (request.getParameter("WIDTH")!=null) && (request.getParameter("HEIGHT")!=null))
			{
				w=new Integer(request.getParameter("WIDTH")).intValue();
				h=new Integer(request.getParameter("HEIGHT")).intValue();
			}
			else
			{
				//a temp image must be created to find the preferred size
				cb.autoSize=true;
				cb.setSize(90,90);
				java.awt.image.BufferedImage imageTemp = new java.awt.image.BufferedImage( cb.getSize().width,cb.getSize().height,java.awt.image.BufferedImage.TYPE_BYTE_INDEXED );
				java.awt.Graphics imgTempGraphics = imageTemp.createGraphics();
				cb.paint(imgTempGraphics);
				cb.invalidate();
				w=cb.getSize().width;
				h=cb.getSize().height;
				imgTempGraphics.dispose();
			}

			java.awt.image.BufferedImage BarImage=new java.awt.image.BufferedImage(w,h,java.awt.image.BufferedImage.TYPE_INT_RGB);
			java.awt.Graphics2D BarGraphics=BarImage.createGraphics();
			cb.setSize(w,h);
			cb.paint(BarGraphics);
			if (encode.compareToIgnoreCase("gif")==0)
			{
				// encode buffered image to a gif
				GifEncoder encoder = new GifEncoder(BarImage  ,outb);
				encoder.encode();
			}
			else
			{
				// create JPEG image
				com.sun.image.codec.jpeg.JPEGImageEncoder encoder = com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder(outb );
				//increase the JPEG quality to 100%
				com.sun.image.codec.jpeg.JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam( BarImage);
				param.setQuality(1.0F,true);
				encoder.setJPEGEncodeParam(param);
				encoder.encode( BarImage,param  );
			}
		}
		catch (Exception e) { e.printStackTrace();}
	}

	public void doPost (HttpServletRequest request,	HttpServletResponse response) throws ServletException
	{
		try
		{
		doGet(request,response);
		}
		catch (Exception e) { e.printStackTrace();}
	}
}