還需要導入那個jar包?。?？

你是jar包沒有導入成功吧 我按著老師做的 沒有問題

這個是我寫的 你可以看看是不是這樣

package?com.imooc.zxing;

import?com.google.zxing.*;
import?com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import?com.google.zxing.client.j2se.MatrixToImageWriter;
import?com.google.zxing.common.BitMatrix;
import?com.google.zxing.common.HybridBinarizer;
import?com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import?javax.imageio.ImageIO;
import?java.awt.image.BufferedImage;
import?java.io.File;
import?java.nio.file.Path;
import?java.util.HashMap;

/**
?*?生成二維碼
?*/
public?class?CreateQRCode?{
????public?static?void?main(String[]?args)?{
????????createQRCode();
//????????readQRCode();
????}

????private?static?void?readQRCode()?{
????????try?{
????????????MultiFormatReader?formatReader?=?new?MultiFormatReader();
????????????File?file?=?new?File("e:/image.png");
????????????BufferedImage?image?=?null;
????????????image?=?ImageIO.read(file);
????????????HashMap?hashMap?=?new?HashMap();
????????????hashMap.put(EncodeHintType.CHARACTER_SET,?"utf-8");
????????????BinaryBitmap?binaryBitmap?=?new?BinaryBitmap(new?HybridBinarizer(new?BufferedImageLuminanceSource(image)));
????????????Result?result?=?formatReader.decode(binaryBitmap,?hashMap);
????????????System.out.println("解析結果："+result.toString());
????????????System.out.println("二維碼格式類型："+result.getBarcodeFormat());
????????????System.out.println("二維碼文本："+result.getText());

????????}?catch?(Exception?e)?{
????????????e.printStackTrace();
????????}
????}

????private?static?void?createQRCode()?{
????????int?width?=?300;
????????int?height?=?300;
????????String?format?=?"png";
????????String?content?=?"www.baidu.com";

????????//定義二維碼的參數
????????HashMap?hashMap?=?new?HashMap();
????????hashMap.put(EncodeHintType.CHARACTER_SET,?"utf-8");
????????hashMap.put(EncodeHintType.ERROR_CORRECTION,?ErrorCorrectionLevel.M);
????????hashMap.put(EncodeHintType.MARGIN,?5);

????????try?{
????????????BitMatrix?bitMatrix?=?new?MultiFormatWriter().encode(content,?BarcodeFormat.QR_CODE,?width,?height);
????????????Path?file?=?new?File("e:/img.png").toPath();
????????????MatrixToImageWriter.writeToPath(bitMatrix,?format,?file);
????????}?catch?(Exception?e)?{
????????????e.printStackTrace();
????????}
????}
}