java条形码的生成与扫描

1部分代码来自网上，所需jar包：barbecue-1.5-beta1.jar，jbarcode-0.2.8.jar
2
3import java.awt.BorderLayout;
4import java.awt.Component;
5import java.awt.event.KeyAdapter;
6import java.awt.event.KeyEvent;
7import java.awt.event.WindowAdapter;
8import java.awt.event.WindowEvent;
9import java.awt.image.BufferedImage;
10import java.io.FileOutputStream;
11
12import javax.swing.JFrame;
13
14import org.jbarcode.JBarcode;
15import org.jbarcode.encode.Code39Encoder;
16import org.jbarcode.encode.EAN13Encoder;
17import org.jbarcode.paint.BaseLineTextPainter;
18import org.jbarcode.paint.EAN13TextPainter;
19import org.jbarcode.paint.WideRatioCodedPainter;
20import org.jbarcode.paint.WidthCodedPainter;
21import org.jbarcode.util.ImageUtil;
22
23import net.sourceforge.barbecue.Barcode;
24import net.sourceforge.barbecue.BarcodeException;
25import net.sourceforge.barbecue.BarcodeFactory;
26
27/**
28 * @description 针对条形码的帮助类
29 * @使用方法 类名调用
30 * @方法一：getNumStringByBarcode() 扫描条形码得到对应的数字字符串
31 * @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)
32 * @author 
33 * @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。
34 * @方法三：createBarcodePictureByString(String numStr,String path)
35 */
36public class BarcodeUtils {
37
38	static long timeMillis1;
39	static long timeMillis2;
40
41	// 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
42	static boolean IntervalFlag = false;
43
44	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
45	static StringBuilder sb = null;
46	static String str = "";
47	static long timeInterval = 0;
48	static String str2 = "";
49							
50	static boolean scanningGunFlag = false; // 是否是 扫描枪输入
51	static boolean kpressedFlag3 = false;// 是否有键盘输入
52	static boolean keyboardAndScanFlag4 = false;// 判断是不是 先有键盘输入 再有扫描输入
53
54	/**
55	 * 
56	 * @param numStr 条形码字符串
57	 * @param path 图片存储路径，例如"f:/"
58	 */
59	public static void createBarcodePictureByString(String numStr,String path) {
60		try {
61			JBarcode localJBarcode = new JBarcode(EAN13Encoder.getInstance(),
62					WidthCodedPainter.getInstance(),
63					EAN13TextPainter.getInstance());
64			//BufferedImage localBufferedImage = localJBarcode.createBarcode(numStr);
65			//saveToGIF(localBufferedImage, "aaa.gif");
66			
67			 localJBarcode.setEncoder(Code39Encoder.getInstance());
68			 localJBarcode.setPainter(WideRatioCodedPainter.getInstance());
69			 localJBarcode.setTextPainter(BaseLineTextPainter.getInstance());
70			 localJBarcode.setShowCheckDigit(false); //xx str = "JBARCODE-39";
71			 BufferedImage localBufferedImage = localJBarcode.createBarcode(numStr);
72			 saveToPNG(localBufferedImage, numStr+".png",path);
73			
74		} catch (Exception localException) {
75			localException.printStackTrace();
76		}
77	}
78
79	/**
80	 * 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)
81	 * 
82	 * @param numStr
83	 *            条形码数字对象的字符串
84	 */
85	@SuppressWarnings("static-access")
86	public static void getBarcodeByNumString(String numStr) {
87		JFrame frame = new JFrame("getBarcodeByNumString");
88		BarcodeUtils u = new BarcodeUtils();
89		Component contents = u.usingBarbecueAsSwingComponent(numStr);
90		frame.getContentPane().add(contents, BorderLayout.CENTER);
91		frame.addWindowListener(new WindowAdapter() {
92			public void windowClosing(WindowEvent e) {
93				System.exit(0);
94			}
95		});
96		frame.pack();
97		frame.setVisible(true);
98	}
99
100	/**
101	 * 扫描条形码的到数字字符串
102	 * 
103	 * @return 条形码对应的数字字符串
104	 */
105	public static String getNumStringByBarcode() {
106
107		JFrame frame = new JFrame("getNumStringByBarcode");
108		frame.addWindowListener(new WindowAdapter() {
109			public void windowClosing(WindowEvent e) {
110				System.exit(0);
111			}
112		});
113
114		frame.addKeyListener(new KeyAdapter() {
115
116			public void keyPressed(KeyEvent e) {
117				count++;
118				if (IntervalFlag == false) {
119					timeMillis1 = System.currentTimeMillis();
120					// System.out.println(timeMillis1+":t1");
121					IntervalFlag = true;
122				} else {
123					timeMillis2 = System.currentTimeMillis();
124					// System.out.println(timeMillis2+":t2");
125					IntervalFlag = false;
126				}
127				if (count > 1) {
128					timeInterval = Math.abs(timeMillis2 - timeMillis1);
129				}
130				// System.out.print(timeInterval+"---");
131				if (timeInterval < 50) {
132					count++;
133					if (sb == null)
134						sb = new StringBuilder();
135					if (e.getKeyCode() >= KeyEvent.VK_0
136							&& e.getKeyCode() <= KeyEvent.VK_9) {
137						// System.out.println(e.getKeyCode()+":"+e.getKeyChar());
138						sb.append(e.getKeyChar());
139						kpressedFlag3 = true;
140					}
141					if (e.getKeyCode() == KeyEvent.VK_ENTER) {
142						if (scanningGunFlag == true
143								|| keyboardAndScanFlag4 == true) {
144							str = str2 + sb.toString();
145							str2 = "";
146						} else {
147							str = sb.toString();
148						}
149						sb = null;
150						if (str.length() >= 8) {
151							System.out.println("条形码：" + str);
152							
153						} else {
154							str = "";
155						}
156						if (count >= 8) {
157							scanningGunFlag = true;
158							count = 0;
159						}
160					}
161					// System.out.println("str-:"+str);
162					if (kpressedFlag3 == true && scanningGunFlag == false) {
163						// 首先是键盘输入再有扫描输入
164						keyboardAndScanFlag4 = true;
165					}
166				} else {
167					if (e.getKeyCode() >= KeyEvent.VK_0
168							&& e.getKeyCode() <= KeyEvent.VK_9
169							&& scanningGunFlag == true) {
170						// 连续扫描
171						str2 = "" + e.getKeyChar();
172					}
173					if (e.getKeyCode() >= KeyEvent.VK_0
174							&& e.getKeyCode() <= KeyEvent.VK_9
175							&& keyboardAndScanFlag4 == true) {
176						// 先按下键盘再扫描
177						str2 = "" + e.getKeyChar();
178						// System.out.println("s--："+str2);
179						scanningGunFlag = false;
180					}
181					sb = null;
182				}
183
184			}
185
186		});
187
188		frame.pack();
189		frame.setVisible(true);
190		return str;
191
192	}
193
194	/**
195	 * @param num
196	 * @return Component
197	 */
198	private static Component usingBarbecueAsSwingComponent(String num) {
199		Barcode barcode = null;
200		try {
201			barcode = BarcodeFactory.createCode128B(num);
202
203			barcode.setBarHeight(50);
204			barcode.setBarWidth(1);
205		} catch (BarcodeException e) {
206		}
207		return barcode;
208	}
209
210	//////一下方法为createBarcodePictureByString（）需要用到的方法--//
211	@SuppressWarnings("unused")
212	private static void saveToJPEG(BufferedImage paramBufferedImage,
213			String paramString,String path) {
214		saveToFile(paramBufferedImage, paramString, "jpeg",path);
215	}
216
217	private static void saveToPNG(BufferedImage paramBufferedImage,
218			String paramString,String path) {
219		saveToFile(paramBufferedImage, paramString, "png",path);
220	}
221
222	@SuppressWarnings("unused")
223	private static void saveToGIF(BufferedImage paramBufferedImage,
224			String paramString,String path) {
225		saveToFile(paramBufferedImage, paramString, "gif",path);
226	}
227
228	private static void saveToFile(BufferedImage paramBufferedImage,
229			String paramString1, String paramString2,String path) {
230		try {
231			FileOutputStream localFileOutputStream = new FileOutputStream("f:/"
232					+ paramString1);
233			ImageUtil.encodeAndWrite(paramBufferedImage, paramString2,
234					localFileOutputStream, 96, 96);
235			localFileOutputStream.close();
236		} catch (Exception localException) {
237			localException.printStackTrace();
238		}
239	}
240	//------/////
241}