就是按照課程上的代碼敲的,二維碼顯示不出來
package com.imooc.zxing;
import java.io.File;
import java.nio.file.Path;
import java.util.HashMap;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
//生成二維碼
public class CreatQRCode {
public static void main(String[] args)? {
int width = 300;
int height = 300;
String format = "png";
String content = "idcbgp.cn";
//定義二維碼的參數(shù)
HashMap hints = new? HashMap ();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.M);
hints.put(EncodeHintType.MARGIN, 2);
try {
BitMatrix? bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE, width,? height, hints);
? ? ? ? ? ? Path file = new File("E:/java實現(xiàn)成果/img.png").toPath();
MatrixToImageWriter.writeToPath(bitMatrix, format, file);
} catch (Exception e) {
System.out.println("1");
e.printStackTrace();
}
}
}