SpringBoot 与 ZXing 完美结合，轻松生成二维码！

import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.view.RedirectView;
 
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
 
@RestController
public class QrCodeController {
 
    @GetMapping("/generateQrCode")
    public RedirectView generateQrCode(HttpServletResponse response) throws WriterException, IOException {
        String content = "Hello, World!";
        int width = 200;
        int height = 200;
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix bitMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, width, height);
        Path path = FileSystems.getDefault().getPath("qrcode.png");
        MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path);
 
        RedirectView redirectView = new RedirectView();
        redirectView.setUrl("/qrcode.png");
        return redirectView;
    }
}

这段代码使用Spring Boot和ZXing库生成二维码图片，并将其保存到服务器上。然后通过一个重定向视图将其提供给客户端。这是一个简单的示例，展示了如何将这两个库在Spring Boot应用程序中配合使用。