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
import
import

import com.sun.image.codec.jpeg.ImageFormatException;
import
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  
  */


  /** *//**
  * 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);
   

  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 < 9; i++)
  {
  int width = m_nNarrowWidth;

  if (((0x100 >>> i) & sCode) != 0)
  width *= rate;

  if ((i & 0x1) == 0)
  g.fillRect(x, 0, width, m_nImageHeight);

  x += width;
  }
  return x + m_nNarrowWidth;
  }

  
  //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 insert)
  {
  for (int i = 0; i < m_chars.length; i++)
  {
  if (ch == m_chars[i])
  return m_codes[i];
  }
  return 0;
  }
  
  public char insert(String barcodeData){
      char ch;
      for(i=0;i<dataFinal.length;i++)
          ch=barcodeData[i];
          return ch;
         
  }
   
  //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;
  //dataFinal = dataTemp+strRandom;
  /*
  while(hasCus(dataFinal)) //判断是否有此客户代码
  {
  strRandom=""+r.nextInt(9)+""+r.nextInt(9)+""+r.nextInt(9)+""+r.nextInt(9)+""+r.nextInt(9)+""+r.nextInt(9)+""+r.nextInt(9)+""+r.nextInt(9)+"";
  dataFinal = dataTemp+strRandom;
  }  
  */
  return dataFinal;   
  }

}


import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.image.codec.jpeg.JPEGCodec;
为什么总是说这两个包是sun的专用包，难道是这个原因吗？