你有没有使用java生成过二维码？（二）

作者专注于Java、架构、Linux、小程序、爬虫、自动化等技术。工作期间含泪整理出一些资料，微信搜索【JavaUp】，回复【java】【黑客】【爬虫】【小程序】【面试】等关键字免费获取资料。技术交流、项目合作可私聊！

前言

本文是通过google.zxing生成的二维码

兄弟篇（使用QRCode）：java代码生成二维码（一）

源码地址：点我下载源码（私聊免费获取）

JAR包

只给代码，不给jar包就是耍流氓n(*≧▽≦*)n

产生二维码需要用到jar包：

链接：点我下载

密码：wfvl

生成图片的接口

package a;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

import javax.imageio.ImageIO;

import com.google.zxing.common.BitMatrix;
public class MatrixToImageWriter {
     private static final int RED = 0xFFDC143C;
       private static final int WHITE = 0xFFFFFFFF;
     
       private MatrixToImageWriter() {}

       public static 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) ? RED : WHITE);
           }
         }
         return image;
       }

       public static void writeToFile(BitMatrix matrix, String format, File file)
           throws IOException {
         BufferedImage image = toBufferedImage(matrix);
         if (!ImageIO.write(image, format, file)) {
           throw new IOException("Could not write an image of format " + format + " to " + file);
         }
       }

       public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
           throws IOException {
         BufferedImage image = toBufferedImage(matrix);
         if (!ImageIO.write(image, format, stream)) {
           throw new IOException("Could not write an image of format " + format);
         }
       }
}

测试

package a;

import java.io.File;
import java.util.Hashtable;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;

public class Test {

    public static void main(String[] args) throws Exception{
        String text = "https://blog.csdn.net/qq_26230421";//二维码的内容
        int width = 400;
        int height = 400;
        String format = "png";
        Hashtable hints= new Hashtable();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height,hints);
        File outputFile = new File("D:/shuchu.png");
        MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
        System.out.println("It is ok!");
    }
}