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Java生成二维码——基于Google插件 1.打开IDEA，点击File，新建Module，选择Maven然后点击下一步，在Name输入框中给这个模块取个名字即可，点击Finish。2.在pom.xml配置文件中添加以下依赖：<properties> <java.version>1.8</java.version> </properties> <dependencies> <!--添加二维码生成相关的jar包--> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.3.2</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.2.1</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13</version> <scope>test</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.68</version> </dependency> </dependencies>3.在src下的test.java包中新建一个测试类QRCode.java,源代码如下：import com.alibaba.fastjson.JSONObject; import com.google.zxing.*; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import org.junit.Test; import java.io.IOException; import java.nio.file.FileSystems; import java.nio.file.Path; import java.util.HashMap; import java.util.Map; public class QRCodeTest { @Test public void creatQRCode() throws WriterException, IOException { //1.定义json格式字符串，使用fastJson JSONObject jsonObject = new JSONObject(); //2.把数据存放在json对象中 jsonObject.put("name","xxx"); jsonObject.put("address","xxxxxxxx"); jsonObject.put("major","计算机科学与技术"); jsonObject.put("电话","xxxxxxx"); jsonObject.put("company","https://www.lxrao.com/"); //3.将json对象转换为json格式的字符串 String contest = jsonObject.toString(); //4.定义二维码的规格 int width = 200;int height = 200; //5.创建Map集合 Map<EncodeHintType,Object> map = new HashMap(); map.put(EncodeHintType.CHARACTER_SET,"UTF-8"); //6.创建位矩阵对象 BitMatrix bitMatrix = new MultiFormatWriter().encode(contest, BarcodeFormat.QR_CODE,width,height,map); //7.指定生成的路径和文件名 String path = "E://QRCodeImage//"; String filename = "QRCode.jpg"; //8.创建路径对象 Path path1 = FileSystems.getDefault().getPath(path,filename); //9.将矩阵对象生成为图片格式 MatrixToImageWriter.writeToPath(bitMatrix,"jpg",path1); System.out.println("生成二维码成功！"); } } -
