依赖导入
<!– 添加图形验证码依赖 –>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-captcha</artifactId>
<version>5.8.5</version>
</dependency>
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/**
* 生成验证码图片
* @return
*/
@ApiOperation(“获取图形验证码”)
@GetMapping(“/identifyImage”)
public Result<String> identifyImage(HttpServletResponse response,
@ApiParam(value = “图形验证码id,无值：生成验证码，有值:刷新验证码”)
@RequestParam(name = “codeId”, required = false) String codeId) throws IOException {
// 创建验证码，设置宽、高、长度、干扰线数量
LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 90, 4, 100);
// 获取验证码字符串，赋值code
String code = lineCaptcha.getCode();
if (codeId == null) {
// IdWorker.getId():IdWorker工具类生成唯一ID,并转换成String类型
codeId = String.valueOf(IdWorker.getId());
// 将codeId、code.toUpperCase()、过期时间60秒：存储入Redis中
// code.toUpperCase():code装换成大写形式存储
redisOps.set(codeId,code.toUpperCase(),60);
} else {
redisOps.set(codeId,code.toUpperCase(),60);
}
// 将图片验证码codeId设置请求头中
response.setHeader(“codeId”, codeId);
// 获取向客户端发送响应数据的输出流
try (ServletOutputStream outputStream = response.getOutputStream()) {
// 验证码图片数据写入到输出流
lineCaptcha.write(outputStream);
} catch (Exception e) {
throw new AuthException(“图形验证码输出错误”);
}
return Result.succ(codeId);
}
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