springboot条形码工具包

您可以使用Zxing库来生成和解析条形码。在Spring Boot中，您可以将其作为依赖项添加到您的项目中。以下是一个简单的示例：

1. 添加Maven依赖项：

<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.4.1</version>
</dependency>
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>javase</artifactId>
    <version>3.4.1</version>
</dependency>

2. 创建一个BarCodeGenerator类：

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;

public class BarCodeGenerator {
    private static final int WIDTH = 300;
    private static final int HEIGHT = 300;
    private static final String FORMAT = "png";
    
    public static void generateBarCode(String data, String filePath) throws WriterException, IOException {
        BitMatrix bitMatrix = new MultiFormatWriter().encode(data, BarcodeFormat.CODE_128, WIDTH, HEIGHT);
        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, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        File file = new File(filePath);
        ImageIO.write(image, FORMAT, file);
    }
}

3. 在您的控制器中使用BarCodeGenerator类：

import java.io.IOException;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import com.google.zxing.WriterException;

@RestController
public class BarCodeController {
    @GetMapping("/barcode/{data}")
    public String generateBarCode(@PathVariable String data) {
        try {
            BarCodeGenerator.generateBarCode(data, "barcode.png");
            return "Bar code generated successfully!";
        } catch (WriterException | IOException e) {
            return "Error generating bar code: " + e.getMessage();
        }
    }
}

现在，当您访问`/barcode/123456789`时，将生成一个名为`barcode.png`的条形码文件。