barcode使用方法.docx

barcode使用方法JAR包：barcode4J.jar avalon-framework-4.2.0.jarWeb.xml添加上：BarcodeServletcom.telehot.jdt2.web.servlet.BarcodeServletBarcodeServlet/barcode创建一个BarcodeServlet，源码如下：package com.telehot.jdt2.web.servlet;import java.io.ByteArrayOutputStream;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.xml.transform.Result;import javax.xml.transform.Source;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMSource;import javax.xml.transform.stream.StreamResult;import org.apache.avalon.framework.configuration.Configuration;import org.apache.avalon.framework.configuration.DefaultConfiguration;import org.apache.avalon.framework.logger.ConsoleLogger;import org.apache.avalon.framework.logger.Logger;import org.krysalis.barcode4j.BarcodeGenerator;import org.krysalis.barcode4j.BarcodeUtil;import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;import org.krysalis.barcode4j.output.eps.EPSCanvasProvider;import org.krysalis.barcode4j.output.svg.SVGCanvasProvider;import org.krysalis.barcode4j.tools.MimeTypes;import org.w3c.dom.DocumentFragment;public class BarcodeServlet extends HttpServlet private static final long serialVersionUID = -1612710758060435089L; public static final String BARCODE_MSG = msg; public static final String BARCODE_TYPE = type; public static final String BARCODE_HEIGHT = height; public static final String BARCODE_MODULE_WIDTH = mw; public static final String BARCODE_WIDE_FACTOR = wf; public static final String BARCODE_QUIET_ZONE = qz; public static final String BARCODE_HUMAN_READABLE_POS = hrp; public static final String BARCODE_FORMAT = fmt; public static final String BARCODE_IMAGE_RESOLUTION = res; public static final String BARCODE_IMAGE_GRAYSCALE = gray; public static final String BARCODE_HUMAN_READABLE_SIZE = hrsize; public static final String BARCODE_HUMAN_READABLE_FONT = hrfont; public static final String BARCODE_HUMAN_READABLE_PATTERN = hrpattern; private transient Logger log = new ConsoleLogger(1); protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException try String format = determineFormat(request); int orientation = 0; Configuration cfg = buildCfg(request); String msg = request.getParameter(msg); if (msg = null) msg = 0123456789; BarcodeUtil util = BarcodeUtil.getInstance(); BarcodeGenerator gen = util.createBarcodeGenerator(cfg); ByteArrayOutputStream bout = new ByteArrayOutputStream(4096); try if (format.equals(image/svg+xml) SVGCanvasProvider svg = new SVGCanvasProvider(false, orientation); gen.generateBarcode(svg, msg); DocumentFragment frag = svg.getDOMFragment(); TransformerFactory factory = TransformerFactory.newInstance(); Transformer trans = factory.newTransformer(); Source src = new DOMSource(frag); Result res = new StreamResult(bout); trans.transform(src, res); else if (format.equals(image/x-eps) EPSCanvasProvider eps = new EPSCanvasProvider(bout, orientation); gen.generateBarcode(eps, msg); eps.finish(); else String resText = request.getParameter(res); int resolution = 300; if (resText != null) resolution = Integer.parseInt(resText); if (resolution 2400) throw new IllegalArgumentException(Resolutions above 2400dpi are not allowed); if (resolution 10) throw new IllegalArgumentException(Minimum resolution must be 10dpi); String gray = request.getParameter(gray); BitmapCanvasProvider bitmap = true.equalsIgnoreCase(gray) ? new BitmapCanvasProvider(bout, format, resolution, 10, true, orientation) : new BitmapCanvasProvider(bout, format, resolution, 12, false, orientation); gen.generateBarcode(bitmap, msg); bitmap.finish(); finally bout.close(); response.setContentType(format); response.setContentLength(bout.size(); response.getOutputStream().write(bout.toByteArray(); response.getOutputStream().flush(); catch (Exception e) this.log.error(Error while generating barcode, e); throw new ServletException(e); catch (Throwable t) this.log.error(Error while generating barcode, t); throw new ServletException(t); protected String determineFormat(HttpServletRequest request) String format = request.getParameter(fmt); format = MimeTypes.expandFormat(format); if (format = null) format = image/svg+xml; return format; protected Configuration buildCfg(HttpServletRequest request) DefaultConfiguration cfg = new DefaultConfiguration(barcode); String type = request.getParameter(type); if (type = null) type = code128; DefaultConfiguration child = new DefaultConfiguration(type); cfg.addChild(child); String height = request.getParameter(height); if (height != null) DefaultConfiguration attr = new DefaultConfiguration(height); attr.setValue(height); child.addChild(attr); String moduleWidth = request.getParameter(mw); if (moduleWidth != null) DefaultConfiguration attr = new DefaultConfiguration(module-width); attr.setValue(moduleWidth); child.addChild(attr); String wideFactor = request.getParameter(wf); if (wideFactor != null) DefaultConfiguration attr = new DefaultConfiguration(wide-factor); attr.setValue(wideFactor); child.addChild(attr); String quietZone = request.getParameter(qz); if (quietZone != null) DefaultConfiguration attr = new DefaultConfiguration(quiet-zone); if (quietZone.startsWith(disable) attr.setAttribute(enabled, false); else attr.setValue(quietZone); child.addChild(attr); String humanReadablePosition = request.getParameter(hrp); String pattern = request.getParameter(hrpattern); String humanReadableSize = request.getParameter(hrsize); String humanReadableFont = request.getParameter(hrfont); if (humanReadablePosition != null) | (pattern != null) | (humanReadableSize != null) | (humanReadableFont != null) DefaultConfiguration attr = new DefaultConfiguration(human-readable); if (pattern != null) DefaultConfiguration subAttr = new Defa