package com.dy.common.util;
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import com.google.zxing.BarcodeFormat;
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import com.google.zxing.EncodeHintType;
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import com.google.zxing.client.j2se.MatrixToImageWriter;
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import com.google.zxing.common.BitMatrix;
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import com.google.zxing.qrcode.QRCodeWriter;
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import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
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import javax.imageio.ImageIO;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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public class QrCodeTest2 {
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public static void main(String[] args) throws Exception {
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String imgpath = "D:\\demo\\";
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createq("1002001", "确定" , imgpath + "test2.jpg");
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}
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private static void createq(String code, String name, String imgpath) throws Exception{
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//二维码大小
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int size = 300;
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//设置二维码参数
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Map hints = new HashMap();
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//设置UTF-8， 防止中文乱码
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hints .put(EncodeHintType.CHARACTER_SET, "UTF-8");
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// 设置二维码的容错性
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hints .put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
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//留白 默认4
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hints .put(EncodeHintType.MARGIN, 1);
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// 码版本，取值为 1 到 40 ,根据二维码内容决定最低版本
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//param.put(EncodeHintType.QR_VERSION, 3);
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//创建码位图
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BitMatrix bitMatrix = new QRCodeWriter().encode(code, BarcodeFormat.QR_CODE, size, size, hints );
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//将生成码位图转换成BufferedImage
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BufferedImage qrImage = MatrixToImageWriter.toBufferedImage(bitMatrix);
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int fontSize = 30 ;
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//设置画布内边距
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int padding = 5;
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//画布大小
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int combinedWidth = size + padding * 2 ;
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int combinedHeight = size + padding * 2 + fontSize;
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//创建空白BufferedImage
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BufferedImage combined = new BufferedImage(combinedWidth, combinedHeight, BufferedImage.TYPE_INT_RGB);
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//从BufferedImage对象中获取画布（Graphics2D）对象
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Graphics2D graphics = combined.createGraphics();
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//设置渲染提示为启用文本抗锯齿
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graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
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//默认开启绘图抗锯齿
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//graphics.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL,RenderingHints.VALUE_STROKE_DEFAULT);
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//设置空白画布整体背景颜色
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GraphicsUtils.drawBackground(graphics,0, 0, combinedWidth, combinedHeight,Color.WHITE);
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int linepadding = padding - 1 ;
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//绘制矩形
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GraphicsUtils.drawRectangle(graphics, linepadding, linepadding,
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combinedWidth - linepadding * 2,
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combinedHeight - linepadding * 2, Color.BLACK);
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//二维码插入画布
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GraphicsUtils.drawImage(graphics, qrImage, padding, padding);
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//绘制头部字体
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Font titleFont = new Font("宋体", Font.BOLD, fontSize);
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GraphicsUtils.drawFont(graphics,titleFont,Color.BLUE);
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FontMetrics fontMetrics = graphics.getFontMetrics();
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int fontWidth = fontMetrics.stringWidth(name);
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int xName = ((combinedWidth - fontWidth) / 2);
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int yName = combinedHeight - padding - fontSize/2 ;
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// int yName = combinedHeight - padding - fontWidth/2 ;
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GraphicsUtils.drawText(graphics, name, xName, yName, titleFont, Color.BLUE);
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graphics.dispose();
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try {
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ImageIO.write(combined, "jpg",new File(imgpath) );
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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