java 条形码 源码.doc

package test;import java.awt.image.BufferedImage;import java.awt.Graphics;import java.awt.Color;import java.awt.geom.AffineTransform;import java.awt.image.AffineTransformOp;import com.sun.image.codec.jpeg.JPEGImageEncoder;import com.sun.image.codec.jpeg.JPEGCodec;import java.io.File;import java.io.FileOutputStream;import java.io.OutputStream;import com.sun.image.codec.jpeg.ImageFormatException;import java.io.IOException;import java.util.Random;/* */* 符合BarCode 39规范的条码图像生成器* author ChenLiang & LiGuang*/public class BarCodeImage private static final int rate = 3; /条码宽条与窄条宽度之比 private int m_nNarrowWidth; /窄条的宽度像素数 private int m_nImageHeight; /条码的高度像素数 private boolean m_bRotato; /输出的图像是否需要先旋转 /* */* * 根据strCodes传入的字符串，生成符合BarCode 39规范的JPEG输出流； * param nNarrowWidth * param nImageHeight */* public BarCode39ImageBuilder(int nNarrowWidth, int nImageHeight) m_nNarrowWidth = nNarrowWidth; m_nImageHeight = nImageHeight; m_bRotato = false; */* */* * 构造函数，默认窄条宽为4像素，条码高度是100像素； */* public BarCode39ImageBuilder() this(1, 33); */ /* */* * 设置是否需要将结果图像在输出之前进行旋转；系统默认是不旋转 * param b true:旋转，false:不旋转 */ public void setRotato(boolean b) m_bRotato = b; /* */* * 生成相应的Bar Code图像，格式以jpeg格式的输出流； * param strCodes 要生成条码的字符串，注意该字符串需要包含首尾的两个星号 * param out 接结果的输出流 * throws IOException * throws ImageFormatException * throws IOException */ public void getImage(String strCodes, String path) throws ImageFormatException, IOException String fileBar= System.getProperty(file.separator); File myPNG = new File(path); OutputStream out = new FileOutputStream(myPNG); if (null=strCodes | null=out | 0=strCodes.length() return; int nImageWidth = (strCodes.length() * (3 * rate + 7) * m_nNarrowWidth); BufferedImage bi = new BufferedImage(nImageWidth, m_nImageHeight+13, BufferedImage.TYPE_INT_RGB); Graphics g = bi.getGraphics(); g.setColor(Color.WHITE); g.fillRect(0, 0, nImageWidth, m_nImageHeight); g.setColor(Color.BLACK); int startx = 0; for (int i = 0; i strCodes.length(); i+) startx = drawOneChar(g, startx, strCodes.charAt(i); g.setColor(Color.WHITE); g.fillRect(0, 33, nImageWidth, 13); g.setColor(Color.BLACK); g.drawString(strCodes, nImageWidth/4, 45); if (m_bRotato) /旋转 bi = flipX2Y(bi); JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(bi); while(true) /图片生成完毕后，向下运行 if(myPNG.exists() /System.out.println(-over); break; /* */* * 辅助方法，绘制一个字符 * param g 画布 * param x 起始位置 * param ch 要绘制的字符 * return 下一个要绘制字符的位置 */ private int drawOneChar(Graphics g, int x, char ch) short sCode = getCharCode(ch); for (int i = 0; i i) & sCode) != 0) width *= rate; if (i & 0x1) = 0) g.fillRect(x, 0, width, m_nImageHeight); x += width; return x + m_nNarrowWidth; /* */* * 图像翻转，即X与Y方向互换 * param in 源图像 * return 翻转后的图像 */ private BufferedImage flipX2Y(BufferedImage in) BufferedImage out = new BufferedImage(in.getHeight(), in.getWidth(), in.getType(); /请查看JDK AffineTransform affineTransform = new AffineTransform(0, 1, 1, 0, 0, 0); AffineTransformOp affineTransformOp = new AffineTransformOp(affineTransform, AffineTransformOp.TYPE_NEAREST_NEIGHBOR); return affineTransformOp.filter(in, out); / 原来旋转的版本，仅供参考 / private BufferedImage rotate(BufferedImage in) / / int width = in.getWidth(); / int height = in.getHeight(); / BufferedImage out = new BufferedImage(height, width, in.getType(); / / AffineTransform affineTransform = AffineTransform.getRotateInstance(Math.toRadians(90); / affineTransform.translate(0, -height); / / AffineTransformOp affineTransformOp = new AffineTransformOp(affineTransform, / AffineTransformOp.TYPE_NEAREST_NEIGHBOR); / affineTransformOp.filter(in, out); / return out; / /Code39符号表 private static final char m_chars = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, -, ., , *, $, /, +, % ; /Code39符号所对应的码表，16进制编码 n为0 w为1 private static final short m_codes = 0x34, 0x121, 0x61, 0x160, 0x31, 0x130, 0x70, 0x25, 0x124, 0x64, 0x109, 0x49, 0x148, 0x19, 0x118, 0x58, 0xd, 0x10c, 0x4c, 0x1c, 0x103, 0x43, 0x142, 0x13, 0x112, 0x52, 0x7, 0x106, 0x46, 0x16, 0x181, 0xc1, 0x1c0, 0x91, 0x190, 0xd0, 0x85, 0x184, 0xc4, 0x94, 0xa8, 0xa2, 0x8a, 0x2a ; /* */* * 通过码表符号获得码表字符 * param ch 码表符号 * return 码表值 */ private static short getCharCode(char ch) for (int i = 0; i m_chars.length; i+) if (ch = m_charsi) return m_codesi; return 0; /生成条形码的数据-8位随机字符串 public String barcodeData() String dataFinal = null; /String dataTemp = longDateFormat.format(new java.util.Date(); Random r = new Random(); String strRandom = +r.nextInt(9)+r.nextInt(9)+r.nextInt(9)+r.nextInt(9)+; dataFinal = strRandom; /d