java条形码的生成与扫描

部分代码来自网上，所需jar包：barbecue-1.5-beta1.jar，jbarcode-0.2.8.jar

import java.awt.BorderLayout;import java.awt.Component;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.image.BufferedImage;import java.io.FileOutputStream;import javax.swing.JFrame;import org.jbarcode.JBarcode;import org.jbarcode.encode.Code39Encoder;import org.jbarcode.encode.EAN13Encoder;import org.jbarcode.paint.BaseLineTextPainter;import org.jbarcode.paint.EAN13TextPainter;import org.jbarcode.paint.WideRatioCodedPainter;import org.jbarcode.paint.WidthCodedPainter;import org.jbarcode.util.ImageUtil;import net.sourceforge.barbecue.Barcode;import net.sourceforge.barbecue.BarcodeException;import net.sourceforge.barbecue.BarcodeFactory;/** * @description 针对条形码的帮助类 * @使用方法 类名调用 * @方法一：getNumStringByBarcode() 扫描条形码得到对应的数字字符串 * @方法二：（可以不用，方法三取代）getBarcodeByNumString(String numStr) 通过一串数字字符串得到条形码(swing显示) * @author  * @区分键盘输入还是扫描枪输入 思路：扫描输入的间隔比较均匀且时间很短（小于50毫秒）， 而手动输入间隔至少在100毫秒以上。 * @方法三：createBarcodePictureByString(String numStr,String path) */public class BarcodeUtils {static long timeMillis1;static long timeMillis2;// 求间隔时间时用到的标志位，每进来一次keyPressed方法，把flag置反，并且记录当前系统的时间毫秒值前后相减，得到间隔时间static boolean IntervalFlag = false;static int count = 0;// 进入一次keyPressed()方法加1，第一次进入是不算时间间隔，count=2时开始算，另外可以用来判断是否是连续多次输入static StringBuilder sb = null;static String str = "";static long timeInterval = 0;static String str2 = "";static boolean scanningGunFlag = false; // 是否是 扫描枪输入static boolean kpressedFlag3 = false;// 是否有键盘输入static boolean keyboardAndScanFlag4 = false;// 判断是不是 先有键盘输入 再有扫描输入/** *  * @param numStr 条形码字符串 * @param path 图片存储路径，例如"f:/" */public static void createBarcodePictureByString(String numStr,String path) {try {JBarcode localJBarcode = new JBarcode(EAN13Encoder.getInstance(),WidthCodedPainter.getInstance(),EAN13TextPainter.getInstance());//BufferedImage localBufferedImage = localJBarcode.createBarcode(numStr);//saveToGIF(localBufferedImage, "aaa.gif"); localJBarcode.setEncoder(Code39Encoder.getInstance()); localJBarcode.setPainter(WideRatioCodedPainter.getInstance()); localJBarcode.setTextPainter(BaseLineTextPainter.getInstance()); localJBarcode.setShowCheckDigit(false); //xx str = "JBARCODE-39"; BufferedImage localBufferedImage = localJBarcode.createBarcode(numStr); saveToPNG(localBufferedImage, numStr+".png",path);} catch (Exception localException) {localException.printStackTrace();}}/** * 此方法的作用是更具条形码字符串生成一个条形码(swing界面显示出来) *  * @param numStr *            条形码数字对象的字符串 */@SuppressWarnings("static-access")public static void getBarcodeByNumString(String numStr) {JFrame frame = new JFrame("getBarcodeByNumString");BarcodeUtils u = new BarcodeUtils();Component contents = u.usingBarbecueAsSwingComponent(numStr);frame.getContentPane().add(contents, BorderLayout.CENTER);frame.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {System.exit(0);}});frame.pack();frame.setVisible(true);}/** * 扫描条形码的到数字字符串 *  * @return 条形码对应的数字字符串 */public static String getNumStringByBarcode() {JFrame frame = new JFrame("getNumStringByBarcode");frame.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {System.exit(0);}});frame.addKeyListener(new KeyAdapter() {public void keyPressed(KeyEvent e) {count++;if (IntervalFlag == false) {timeMillis1 = System.currentTimeMillis();// System.out.println(timeMillis1+":t1");IntervalFlag = true;} else {timeMillis2 = System.currentTimeMillis();// System.out.println(timeMillis2+":t2");IntervalFlag = false;}if (count > 1) {timeInterval = Math.abs(timeMillis2 - timeMillis1);}// System.out.print(timeInterval+"---");if (timeInterval < 50) {count++;if (sb == null)sb = new StringBuilder();if (e.getKeyCode() >= KeyEvent.VK_0&& e.getKeyCode() <= KeyEvent.VK_9) {// System.out.println(e.getKeyCode()+":"+e.getKeyChar());sb.append(e.getKeyChar());kpressedFlag3 = true;}if (e.getKeyCode() == KeyEvent.VK_ENTER) {if (scanningGunFlag == true|| keyboardAndScanFlag4 == true) {str = str2 + sb.toString();str2 = "";} else {str = sb.toString();}sb = null;if (str.length() >= 8) {System.out.println("条形码：" + str);} else {str = "";}if (count >= 8) {scanningGunFlag = true;count = 0;}}// System.out.println("str-:"+str);if (kpressedFlag3 == true && scanningGunFlag == false) {// 首先是键盘输入再有扫描输入keyboardAndScanFlag4 = true;}} else {if (e.getKeyCode() >= KeyEvent.VK_0&& e.getKeyCode() <= KeyEvent.VK_9&& scanningGunFlag == true) {// 连续扫描str2 = "" + e.getKeyChar();}if (e.getKeyCode() >= KeyEvent.VK_0&& e.getKeyCode() <= KeyEvent.VK_9&& keyboardAndScanFlag4 == true) {// 先按下键盘再扫描str2 = "" + e.getKeyChar();// System.out.println("s--："+str2);scanningGunFlag = false;}sb = null;}}});frame.pack();frame.setVisible(true);return str;}/** * @param num * @return Component */private static Component usingBarbecueAsSwingComponent(String num) {Barcode barcode = null;try {barcode = BarcodeFactory.createCode128B(num);barcode.setBarHeight(50);barcode.setBarWidth(1);} catch (BarcodeException e) {}return barcode;}//////一下方法为createBarcodePictureByString（）需要用到的方法--//@SuppressWarnings("unused")private static void saveToJPEG(BufferedImage paramBufferedImage,String paramString,String path) {saveToFile(paramBufferedImage, paramString, "jpeg",path);}private static void saveToPNG(BufferedImage paramBufferedImage,String paramString,String path) {saveToFile(paramBufferedImage, paramString, "png",path);}@SuppressWarnings("unused")private static void saveToGIF(BufferedImage paramBufferedImage,String paramString,String path) {saveToFile(paramBufferedImage, paramString, "gif",path);}private static void saveToFile(BufferedImage paramBufferedImage,String paramString1, String paramString2,String path) {try {FileOutputStream localFileOutputStream = new FileOutputStream("f:/"+ paramString1);ImageUtil.encodeAndWrite(paramBufferedImage, paramString2,localFileOutputStream, 96, 96);localFileOutputStream.close();} catch (Exception localException) {localException.printStackTrace();}}//------/////}