kmall-haikong/kmall-admin/src/main/java/com/kmall/admin/utils/pdf/BarcodeUtil.java

package com.kmall.admin.utils.pdf;


import org.apache.commons.lang3.ObjectUtils;
import org.krysalis.barcode4j.HumanReadablePlacement;
import org.krysalis.barcode4j.impl.code128.Code128Bean;
import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;

import javax.imageio.stream.FileImageOutputStream;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;

public class BarcodeUtil {


    /**
     * 生成code128条形码
     *
     * @param height        条形码的高度
     * @param width         条形码的宽度
     * @param message       要生成的文本
     * @param withQuietZone 是否两边留白
     * @param hideText      隐藏可读文本
     * @return 图片对应的字节码
     */
    public static byte[] generateBarCode128(String message, Double height, Double width, boolean withQuietZone, boolean hideText) {
        Code128Bean bean = new Code128Bean();
        // 分辨率
        int dpi = 512;
        // 设置两侧是否留白
        bean.doQuietZone(withQuietZone);

        // 设置条形码高度和宽度
        bean.setBarHeight((double) ObjectUtils.defaultIfNull(height, 9.0D));
        if (width != null) {
            bean.setModuleWidth(width);
        }
        // 设置文本位置（包括是否显示）
        if (hideText) {
            bean.setMsgPosition(HumanReadablePlacement.HRP_NONE);
        }
        // 设置图片类型
        String format = "image/png";

        ByteArrayOutputStream ous = new ByteArrayOutputStream();
        BitmapCanvasProvider canvas = new BitmapCanvasProvider(ous, format, dpi,
                BufferedImage.TYPE_BYTE_BINARY, false, 0);

        // 生产条形码
        bean.generateBarcode(canvas, message);
        try {
            canvas.finish();
        } catch (IOException e) {
            //ByteArrayOutputStream won't happen
        }

        return ous.toByteArray();
    }

    //byte数组到图片到硬盘上
    public static void byte2image(byte[] data, String path){
        if(data.length<3||path.equals("")) return;//判断输入的byte是否为空
        try{
            FileImageOutputStream imageOutput = new FileImageOutputStream(new File(path));//打开输入流
            imageOutput.write(data, 0, data.length);//将byte写入硬盘
            imageOutput.close();
            System.out.println("Make Picture success,Please find image in " + path);
        } catch(Exception ex) {
            System.out.println("Exception: " + ex);
            ex.printStackTrace();
        }
    }


}