java生成彩色附logo二维码

java生成二维码有很多开发的jar包如zxing是谷歌开发的，这里的话我使用zxing的开发包来实现的。我们在很多项目中需要动态生成二维码，来提供给用户，这样让更多人能够很好的通过二维码来体验自己的应用。

下面贴出代码，已经测试通过，大家可以直接复制代码使用：

最后实现结果：

java生成二维码

代码如下：

import java.awt.color;
import java.awt.graphics2d;
import java.awt.image;
import java.awt.geom.affinetransform;
import java.awt.image.affinetransformop;
import java.awt.image.bufferedimage;
import java.io.file;
import java.io.ioexception;
import java.io.unsupportedencodingexception;
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 matrixtoimagewriter {
 private static final int image_width = 100;
 private static final int image_height = 100;
 private static final int image_half_width = image_width / 2;
 private static final int frame_width = 2;
 private static multiformatwriter mutiwriter = new multiformatwriter();
 
 public static void encode(string content, int width, int height,
   string srcimagepath, string destimagepath) {
  try {
   imageio.write(genbarcode(content, width, height, srcimagepath),
     "jpg", new file(destimagepath));
  } catch (ioexception e) {
   e.printstacktrace();
  } catch (writerexception e) {
   e.printstacktrace();
  }
 }
 
 private static bufferedimage genbarcode(string content, int width,
   int height, string srcimagepath) throws writerexception,
   ioexception {
  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");
  hint.put(encodehinttype.error_correction, errorcorrectionlevel.h);
  // 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++) {
    // 左上角颜色,根据自己需要调整颜色范围和颜色  
    if (x > 0 && x < 170 && y > 0 && y < 170) {
     color color = new color(231, 144, 56);
     int colorint = color.getrgb();
     pixels[y * width + x] = matrix.get(x, y) ? colorint
       : 16777215;
    }
    // 读取图片
    else 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];
    } 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 > halfw - 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;
     // 在图片四周形成边框
    } else {
     // 二维码颜色
     int num1 = (int) (50 - (50.0 - 13.0) / matrix.getheight()
       * (y + 1));
     int num2 = (int) (165 - (165.0 - 72.0) / matrix.getheight()
       * (y + 1));
     int num3 = (int) (162 - (162.0 - 107.0)
       / matrix.getheight() * (y + 1));
     color color = new color(num1, num2, num3);
     int colorint = color.getrgb();
     // 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) ? colorint
       : 16777215;
     // 0x000000:0xffffff  
    }
   }
  }
  bufferedimage image = new bufferedimage(width, height,
    bufferedimage.type_int_rgb);
  image.getraster().setdataelements(0, 0, width, height, pixels);
  return image;
 }
 
 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.white);
   graphic.fillrect(0, 0, 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);
   else
    graphic.drawimage(destimage,
      (width - destimage.getwidth(null)) / 2, 0,
      destimage.getwidth(null), destimage.getheight(null),
      color.white, null);
   graphic.dispose();
   destimage = image;
  }
  return (bufferedimage) destimage;
 }
 
 public static void main(string[] args) throws unsupportedencodingexception {
  // 依次为内容(不支持中文),宽,长,中间图标路径,储存路径 
  matrixtoimagewriter.encode("http://www.baidu.com/", 512, 512,
    "d:\\logo.png", "d:\\2013-01.jpg");
 
 }
}

大家可以参考专题：java二维码进行学习

以上就是本文的全部内容，帮助大家设计属于自己的二维码。