java zxing QR 二维码

   google zxing 依赖包

<dependency>
	<groupId>com.google.zxing</groupId>
	<artifactId>javase</artifactId>
	<version>3.2.1</version>
</dependency>

   
 

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;

String text = "hello world 2015.12.30";
String path = "E:\\hello-world.jpg";

Map< EncodeHintType, String > hints = new HashMap< EncodeHintType, String >();
hints.put( EncodeHintType.CHARACTER_SET, "UTF-8" );

BitMatrix bitMatrix = new MultiFormatWriter().encode( text, BarcodeFormat.QR_CODE, 400, 400, hints );
MatrixToImageWriter.writeToPath( bitMatrix, "jpg", Paths.get( path ) );