条形码工具类

package com.busp.web.manager.util;

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
 




import org.apache.commons.lang.StringUtils;
import org.krysalis.barcode4j.impl.code39.Code39Bean;
import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;
import org.krysalis.barcode4j.tools.UnitConv;


/**
 * 条形码工具类*/
public class BarcodeUtil {
     
    /**
     * 生成文件
     *
     * @param msg
     * @param path
     * @return
     */
    public static File generateFile(String msg, String path) {
        File file = new File(path);
        try {
            generate(msg, new FileOutputStream(file));
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }
        return file;
    }
 
    /**
     * 生成字节
     *
     * @param msg
     * @return
     */
    public static byte[] generate(String msg) {
        ByteArrayOutputStream ous = new ByteArrayOutputStream();
        generate(msg, ous);
        return ous.toByteArray();
    }
 
    /**
     * 生成到流
     *
     * @param msg
     * @param ous
     */
    public static void generate(String msg, OutputStream ous) {
        if (StringUtils.isEmpty(msg) || ous == null) {
            return;
        }
 
        Code39Bean bean = new Code39Bean();
 
        // 精细度
        final int dpi = 150;
        // module宽度
        final double moduleWidth = UnitConv.in2mm(1.0f / dpi);
 System.out.println(moduleWidth);
        // 配置对象
        bean.setModuleWidth(moduleWidth );//设置窄模块宽度
        bean.setWideFactor(3);//设置宽条比窄条宽的系数。
        bean.doQuietZone(true);//设置是否应该包括或不包括空白区域
 
        String format = "image/png";
        try {
 
            // 输出到流
            BitmapCanvasProvider canvas = new BitmapCanvasProvider(ous, format, dpi,
                    BufferedImage.TYPE_BYTE_BINARY, false, 0);
 
            // 生成条形码
            bean.generateBarcode(canvas, msg);
 
            // 结束绘制
            canvas.finish();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
 
    public static void main(String[] args) {
        String msg = "156464648";
        String path = "D:\barcode.png";
        File generateFile = generateFile(msg, path);
        System.out.println("=======完成========");    
    }
}