生成条形码(调用工具类)

一个简单的工具类调用其实也不难

<dependency>
   <groupId>com.google.zxing</groupId>
      <artifactId>core</artifactId>
      <version>3.4.0</version>
  </dependency>

还需手动导入这个JAR包：
链接：https://pan.baidu.com/s/1nME3E1OmmFibsgbf-OggBQ
提取码：fa2u

BarcodeController

package com.richfit.richfit.controller;

import com.richfit.richfit.BarcodeUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Random;

/**
 * @ClassName Barcode
 * @Description: 生成条形码
 * @Author BruthLi
 * @Date 2020/2/8
 * @Version V1.0
 **/
@Api(value = "生成条形码")
@RestController
@RequestMapping(value = "/sys/barcode")
public class BarcodeController {

    /**
     * 生成条形码
     * @param path
     * @param imageType
     * @return
     * @throws Exception
     */
    @ApiOperation(value = "生成条形码",notes = "生成条形码")
    @RequestMapping(value = "/barcodeproduct",method = RequestMethod.POST)
    public File barCodeProduct(@ApiParam(name = "path",value = "二维码在本地的保存地址例如C:\\",required = true) @RequestParam(value = "path",required = true)String path,
                               @ApiParam(name = "imageType",value = "生成图片的类型例如 jpg 注意前面不需要加 . ",required = true) @RequestParam(value = "imageType",required = true)String imageType)throws Exception{
        //生成随机文件名
        StringBuilder sb = new StringBuilder();
        sb.append(path);
        sb.append(new Random().nextInt(99999999));
        sb.append(".");
        sb.append(imageType);
        BufferedImage image = BarcodeUtil.insertWords(BarcodeUtil.getBarCode("A80/90R8A8A"), "A80/90R8A(8A侧通孔)");
        File file = new File(sb.toString());
        ImageIO.write(image, imageType,file);
        return file;
    }

}

BarcodeUtil

package com.richfit.richfit;

import com.aliyuncs.utils.StringUtils;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.oned.Code128Writer;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.HashMap;
import java.util.Map;

/**
 * @ClassName BarcodeUtil
 * @Description: 条形码工具类
 * @Author BruthLi
 * @Date 2020/2/8
 * @Version V1.0
 **/
public class BarcodeUtil {
    /** 条形码宽度 */
    private static final int WIDTH = 300;

    /** 条形码高度 */
    private static final int HEIGHT = 50;

    /** 加文字 条形码 */
    private static final int WORDHEIGHT = 75;
    /**
     * 设置 条形码参数
     */
    private static Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>() {
        private static final long serialVersionUID = 1L;
        {
            // 设置编码方式
            put(EncodeHintType.CHARACTER_SET, "utf-8");
        }
    };
    /**
     * 生成 图片缓冲
     * @author fxbin
     * @param vaNumber  VA 码
     * @return 返回BufferedImage
     */
    public static BufferedImage getBarCode(String vaNumber){
        try {
            Code128Writer writer = new Code128Writer();
            // 编码内容, 编码类型, 宽度, 高度, 设置参数
            BitMatrix bitMatrix = writer.encode(vaNumber, BarcodeFormat.CODE_128, WIDTH, HEIGHT, hints);
            return MatrixToImageWriter.toBufferedImage(bitMatrix);
        } catch (WriterException e) {
            e.printStackTrace();
        }
        return null;
    }
    /**
     * 把带logo的二维码下面加上文字
     * @author fxbin
     * @param image  条形码图片
     * @param words  文字
     * @return 返回BufferedImage
     */
    public static BufferedImage insertWords(BufferedImage image, String words){
        // 新的图片，把带logo的二维码下面加上文字
        if (StringUtils.isNotEmpty(words)) {

            BufferedImage outImage = new BufferedImage(WIDTH, WORDHEIGHT, BufferedImage.TYPE_INT_RGB);

            Graphics2D g2d = outImage.createGraphics();

            // 抗锯齿
            setGraphics2D(g2d);
            // 设置白色
            setColorWhite(g2d);

            // 画条形码到新的面板
            g2d.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
            // 画文字到新的面板
            Color color=new Color(0, 0, 0);
            g2d.setColor(color);
            // 字体、字型、字号
            g2d.setFont(new Font("微软雅黑", Font.PLAIN, 18));
            //文字长度
            int strWidth = g2d.getFontMetrics().stringWidth(words);
            //总长度减去文字长度的一半  （居中显示）
            int wordStartX=(WIDTH - strWidth) / 2;
            //height + (outImage.getHeight() - height) / 2 + 12
            int wordStartY=HEIGHT+20;

            // 画文字
            g2d.drawString(words, wordStartX, wordStartY);
            g2d.dispose();
            outImage.flush();
            return outImage;
        }
        return null;
    }

    /**
     * 设置 Graphics2D 属性  （抗锯齿）
     * @param g2d  Graphics2D提供对几何形状、坐标转换、颜色管理和文本布局更为复杂的控制
     */
    private static void setGraphics2D(Graphics2D g2d){
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);
        Stroke s = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER);
        g2d.setStroke(s);
    }

    /**
     * 设置背景为白色
     * @param g2d Graphics2D提供对几何形状、坐标转换、颜色管理和文本布局更为复杂的控制
     */
    private static void setColorWhite(Graphics2D g2d){
        g2d.setColor(Color.WHITE);
        //填充整个屏幕
        g2d.fillRect(0,0,600,600);
        //设置笔刷
        g2d.setColor(Color.BLACK);
    }
}