使用Zxing实现二维码生成器内嵌图片
程序员文章站
2024-03-11 22:20:31
使用zxing实现二维码生成器内嵌图片,具有一定的参考价值,具体如下:
基本思路是先使用zxing生成的二维码图片,然后读取图片,在其中插入图标,然后整个输出图片。...
使用zxing实现二维码生成器内嵌图片,具有一定的参考价值,具体如下:
基本思路是先使用zxing生成的二维码图片,然后读取图片,在其中插入图标,然后整个输出图片。
最近的项目中需要生成二维码,找了几个例子综合下,做出了最后的效果,二维码可以生成图片格式(jpg等)或者在web页面上显示,此片文章仅作记录,雷同之处多多,包涵。。。。
注:需要zxing包装的工具类,大概的流程是读取内嵌的图片,将内容转化成二维码,将图片内嵌到二维码中,出图。
下面是完整代码:
import java.awt.basicstroke; import java.awt.color; import java.awt.graphics2d; import java.awt.image; import java.awt.shape; import java.awt.geom.affinetransform; import java.awt.geom.roundrectangle2d; import java.awt.image.affinetransformop; import java.awt.image.bufferedimage; import java.io.file; import java.io.ioexception; import java.util.hashmap; import java.util.map; import javax.imageio.imageio; import com.google.zxing.barcodeformat; import com.google.zxing.encodehinttype; import com.google.zxing.multiformatwriter; import com.google.zxing.writerexception; import com.google.zxing.common.bitmatrix; import com.google.zxing.qrcode.decoder.errorcorrectionlevel; public class zxing { private static final int black = 0xff000000; private static final int white = 0xffffffff; // 图片宽度的一般 private static final int image_width = 80; private static final int image_height = 80; private static final int image_half_width = image_width / 2; private static final int frame_width = 2; // 二维码写码器 private static multiformatwriter mutiwriter = new multiformatwriter(); public static void main(string[] args) { try { //bitmatrix bitmatrix = multiformatwriter.encode(content, barcodeformat.qr_code, 400, 400,hints); string content="13400000000";//二维码的内容 bufferedimage image = genbarcode(content, 400, 400, "f:\\amazed.png"); if (!imageio.write(image, "jpg", new file("f:\\2122.jpg"))) { throw new ioexception("could not write an image of format "); } /** //将上面的代码换成此处,使用流读入到页面即可 outputstream os = response.getoutputstream(); if (!imageio.write(image, "jpg",os)) { throw new ioexception("could not write an image of format "); } **/ } catch (writerexception e) { e.printstacktrace(); } catch (ioexception e) { // todo auto-generated catch block e.printstacktrace(); } } private bufferedimage tobufferedimage(bitmatrix matrix) { int width = matrix.getwidth(); int height = matrix.getheight(); bufferedimage image = new bufferedimage(width, height, bufferedimage.type_int_rgb); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { image.setrgb(x, y, matrix.get(x, y) ? black : white); } } return image; } private static bufferedimage genbarcode(string content, int width, int height, string srcimagepath) throws writerexception, ioexception { // 读取源图像 bufferedimage scaleimage = scale(srcimagepath, image_width, image_height, true); int[][] srcpixels = new int[image_width][image_height]; for (int i = 0; i < scaleimage.getwidth(); i++) { for (int j = 0; j < scaleimage.getheight(); j++) { srcpixels[i][j] = scaleimage.getrgb(i, j); } } map<encodehinttype, object> hint = new hashmap<encodehinttype, object>(); hint.put(encodehinttype.character_set, "utf-8"); //内容编码 hint.put(encodehinttype.error_correction, errorcorrectionlevel.h);//错误等级 hint.put(encodehinttype.margin, 1); //设置二维码外边框的空白区域的宽度 // 生成二维码 bitmatrix matrix = mutiwriter.encode(content, barcodeformat.qr_code, width, height, hint); // 二维矩阵转为一维像素数组 int halfw = matrix.getwidth() / 2; int halfh = matrix.getheight() / 2; int[] pixels = new int[width * height]; for (int y = 0; y < matrix.getheight(); y++) { for (int x = 0; x < matrix.getwidth(); x++) { // 读取图片 if (x > halfw - image_half_width && x < halfw + image_half_width && y > halfh - image_half_width && y < halfh + image_half_width) { pixels[y * width + x] = srcpixels[x - halfw + image_half_width][y - halfh + image_half_width]; } // 在图片四周形成边框 else if ((x > halfw - image_half_width - frame_width && x < halfw - image_half_width + frame_width && y > halfh - image_half_width - frame_width && y < halfh + image_half_width + frame_width) || (x > halfw + image_half_width - frame_width && x < halfw + image_half_width + frame_width && y > halfh - image_half_width - frame_width && y < halfh + image_half_width + frame_width) || (x > halfw - image_half_width - frame_width && x < halfw + image_half_width + frame_width && y > halfh - image_half_width - frame_width && y < halfh - image_half_width + frame_width) || (x > halfw - image_half_width - frame_width && x < halfw + image_half_width + frame_width && y > halfh + image_half_width - frame_width && y < halfh + image_half_width + frame_width)) { pixels[y * width + x] = 0xfffffff; } else { // 此处可以修改二维码的颜色,可以分别制定二维码和背景的颜色; pixels[y * width + x] = matrix.get(x, y) ? 0xff000000 : 0xfffffff; } } } bufferedimage image = new bufferedimage(width, height, bufferedimage.type_int_rgb); image.getraster().setdataelements(0, 0, width, height, pixels); return image; } /** * 把传入的原始图像按高度和宽度进行缩放,生成符合要求的图标 * * @param srcimagefile * 源文件地址 * @param height * 目标高度 * @param width * 目标宽度 * @param hasfiller * 比例不对时是否需要补白:true为补白; false为不补白; * @throws ioexception */ private static bufferedimage scale(string srcimagefile, int height, int width, boolean hasfiller) throws ioexception { double ratio = 0.0; // 缩放比例 file file = new file(srcimagefile); bufferedimage srcimage = imageio.read(file); image destimage = srcimage.getscaledinstance(width, height, bufferedimage.scale_smooth); // 计算比例 if ((srcimage.getheight() > height) || (srcimage.getwidth() > width)) { if (srcimage.getheight() > srcimage.getwidth()) { ratio = (new integer(height)).doublevalue() / srcimage.getheight(); } else { ratio = (new integer(width)).doublevalue() / srcimage.getwidth(); } affinetransformop op = new affinetransformop( affinetransform.getscaleinstance(ratio, ratio), null); destimage = op.filter(srcimage, null); } if (hasfiller) {// 补白 bufferedimage image = new bufferedimage(width, height, bufferedimage.type_int_rgb); graphics2d graphic = image.creategraphics(); graphic.setcolor(color.pink); graphic.fillrect(10, 10, width, height); graphic.drawrect(100, 360, width, height); if (width == destimage.getwidth(null)) { graphic.drawimage(destimage, 0, (height - destimage.getheight(null)) / 2, destimage.getwidth(null), destimage.getheight(null), color.white, null); shape shape = new roundrectangle2d.float(0, (height - destimage.getheight(null)) / 2, width, width, 20, 20); graphic.setstroke(new basicstroke(5f)); graphic.draw(shape); } else { graphic.drawimage(destimage, (width - destimage.getwidth(null)) / 2, 0, destimage.getwidth(null), destimage.getheight(null), color.white, null); shape shape = new roundrectangle2d.float((width - destimage.getwidth(null)) / 2, 0, width, width, 20, 20); graphic.setstroke(new basicstroke(5f)); graphic.draw(shape); } graphic.dispose(); destimage = image; } return (bufferedimage) destimage; } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
推荐阅读
-
使用Zxing实现二维码生成器内嵌图片
-
Laravel使用PHPQRCODE实现生成带有LOGO的二维码图片功能示例
-
Android项目实战(二十八):使用Zxing实现二维码及优化实例
-
Android项目实战(二十八):使用Zxing实现二维码及优化实例
-
c#裁剪图片后使用zxing生成二维码示例分享
-
使用python调用zxing库生成二维码图片详解
-
使用python调用zxing库生成二维码图片详解
-
c#裁剪图片后使用zxing生成二维码示例分享
-
android zxing 解析二维码图片与生成二维码图片的代码实现
-
【SpringBoot学习】18、SpringBoot 使用 zxing 工具生成二维码,实现微信扫描可跳转