用的spring boot项目做的案例
pom文件
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.zxing/core
用的google的API,生成二维码
-->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.0</version>
</dependency>
控制层代码
package com.qr.controller;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageConfig;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Hashtable;
@Controller
public class QrController {
//返回的html网页
@RequestMapping("/index")
public String index(){
return "index";
}
//获取二维码的地址,如有需要还可以加个参数,自定义生成二维码的内容
@RequestMapping("/qr")
public void qr(HttpServletResponse response){
try {
qrCode(response.getOutputStream(),"这是一个二维码",200);
} catch (IOException e) {
e.printStackTrace();
}
}
//生成二维码的方法
public static void qrCode(OutputStream stream, String text, int size){
try {
BitMatrix matrix = cteateBitMatrix(text, size);
MatrixToImageConfig config = new MatrixToImageConfig(0xFF000000, 0xFFFFFFFF);
MatrixToImageWriter.writeToStream(matrix, "png", stream, config);
} catch (WriterException | IOException e) {
}
}
private static BitMatrix cteateBitMatrix(String text, int size) throws WriterException {
Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); // 内容所使用编码
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);// 指定纠错等级
hints.put(EncodeHintType.MARGIN, 0); // 白边大小,取值范围0~4
BitMatrix matrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, size, size, hints);
return matrix;
}
}
HTML内容,及项目结构
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