关于前面二维码生成类字数限制的修改

/** * */
package com.b510.qrcode;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Map;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.Writer;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.oned.CodaBarWriter;
import com.google.zxing.oned.Code128Writer;
import com.google.zxing.oned.Code39Writer;
import com.google.zxing.oned.EAN13Writer;
import com.google.zxing.oned.EAN8Writer;
import com.google.zxing.oned.ITFWriter;
import com.google.zxing.oned.UPCAWriter;
import com.google.zxing.pdf417.encoder.PDF417Writer;
import com.google.zxing.qrcode.QRCodeWriter;
/** * 利用zxing开源工具生成二维码QRCode * * @date 2012-10-26 * @author xhw * */
public class QRCode {
private static final int BLACK = 0xff000000;
private static final int WHITE = 0xFFFFFFFF;
/** * @param args */
public static void main(String[] args) {
QRCode test = new QRCode();
/** * 在com.google.zxing.MultiFormatWriter类中，定义了一些我们不知道的码,二维码只是其中的一种
* public BitMatrix encode(String contents, BarcodeFormat format, int width, int height, Map hints) throws WriterException { Writer writer; switch (format) { case EAN_8: writer = new EAN8Writer(); break; case EAN_13: writer = new EAN13Writer(); break; case UPC_A: writer = new UPCAWriter(); break; case QR_CODE: writer = new QRCodeWriter(); break; case CODE_39: writer = new Code39Writer(); break; case CODE_128: writer = new Code128Writer(); break; case ITF: writer = new ITFWriter(); break; case PDF_417: writer = new PDF417Writer(); break; case CODABAR: writer = new CodaBarWriter(); break; default: throw new IllegalArgumentException("No encoder available for format " + format); } return writer.encode(contents, format, width, height, hints); } */
String filePostfix="png";
File file = new File("C://test_QR_CODE."+filePostfix);
test.encode("helloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongtenhelloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongten", file,filePostfix, BarcodeFormat.QR_CODE, 5000, 5000, null);
test.decode(file);
}
/** * 生成QRCode二维码
* 在编码时需要将com.google.zxing.qrcode.encoder.Encoder.java中的
* static final String DEFAULT_BYTE_MODE_ENCODING = "ISO8859-1";
* 修改为UTF-8，否则中文编译后解析不了
* @param contents 二维码的内容 * @param file 二维码保存的路径，如：C://test_QR_CODE.png * @param filePostfix 生成二维码图片的格式：png,jpeg,gif等格式 * @param format qrcode码的生成格式 * @param width 图片宽度 * @param height 图片高度 * @param hints */
public void encode(String contents, File file,String filePostfix, BarcodeFormat format, int width, int height, Map hints) {
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, format, width, height);
writeToFile(bitMatrix, filePostfix, file);
} catch (Exception e) {
e.printStackTrace();
}
}
/** * 生成二维码图片
* * @param matrix * @param format * 图片格式 * @param file * 生成二维码图片位置 * @throws IOException */
public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
BufferedImage image = toBufferedImage(matrix);
ImageIO.write(image, format, file);
}
/** * 生成二维码内容
* * @param matrix * @return */
public static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
for (int x = 0; x for (int y = 0; y image.setRGB(x, y, matrix.get(x, y) == true ? BLACK : WHITE);
}
}
return image;
}
/** * 解析QRCode二维码 */
@SuppressWarnings("unchecked")
public void decode(File file) {
try {
BufferedImage image;
try {
image = ImageIO.read(file);
if (image == null) {
System.out.println("Could not decode image");
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
@SuppressWarnings("rawtypes")
Hashtable hints = new Hashtable();
//解码设置编码方式为：utf-8
hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
result = new MultiFormatReader().decode(bitmap, hints);
String resultStr = result.getText();
System.out.println("解析后内容：" + resultStr);
} catch (IOException ioe) {
System.out.println(ioe.toString());
} catch (ReaderException re) {
System.out.println(re.toString());
}
} catch (Exception ex) {
System.out.println(ex.toString());
}
}
}


所需的zxing的jar包已经上传;