java生成在线验证码

<dependency>
<groupId>com.github.whvcse</groupId>
<artifactId>easy-captcha</artifactId>
<version>1.6.2</version>
</dependency>

@GetMapping("/captcha")
public Result captcha(HttpServletRequest request, HttpServletResponse response) throws Exception {
CaptchaUtil.out(request, response);
}

@GetMapping("/captcha")
public Result captcha(HttpServletRequest request, HttpServletResponse response) throws Exception {
//第二种
// // 设置位数
CaptchaUtil.out(5, request, response);
// // 设置宽、高、位数
CaptchaUtil.out(130, 48, 5, request, response);
//
// // 使用gif验证码
GifCaptcha gifCaptcha = new GifCaptcha(130,48,4);
CaptchaUtil.out(gifCaptcha, request, response);
}

@GetMapping("/captcha")
public Result captcha(HttpServletRequest request, HttpServletResponse response) throws Exception {
SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 5);
String verCode = specCaptcha.text().toLowerCase();
String key = UUID.randomUUID().toString();
redisUtil.opsForValue().set(key, verCode, 30, TimeUnit.MINUTES);
// 将key和base64返回给前端
HashMap<String, Object> hashMap = new HashMap<>();
hashMap.put("key", key);
hashMap.put("image", specCaptcha.toBase64());
return Result.ok(hashMap);
}

@Override
public Result makeCode() {
SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 5);
specCaptcha.setCharType(Captcha.TYPE_ONLY_LOWER);
String verCode = specCaptcha.text().toUpperCase();
String key = UUID.randomUUID().toString();
// System.out.println(key);
// System.out.println(verCode);
redisUtil.opsForValue().set(key, verCode, 60*10, TimeUnit.SECONDS);
// 将key和base64返回给前端
HashMap<String, Object> hashMap = new HashMap<>();
hashMap.put("codeKey", key);
hashMap.put("imageCode", specCaptcha.toBase64());
return Result.ok(hashMap);
}

   String verCode = specCaptcha.text().toUpperCase();

@Override
public void makeCodeTwo(String uuid, HttpServletResponse response) throws IOException {
if(StringUtils.isBlank(uuid)){
response.setContentType("application/json;charset=UTF-8");
//设置编码格式
response.setCharacterEncoding("UTF-8");
response.setStatus(401);
response.getWriter().write("uuid不能为空");
}
SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 5);
specCaptcha.setCharType(Captcha.TYPE_ONLY_LOWER);
String verCode = specCaptcha.text().toUpperCase();
redisUtil.opsForValue().set(uuid, verCode, 60*10, TimeUnit.SECONDS);
specCaptcha.out(response.getOutputStream());
}

@Component
public class SpringContextUtil implements ApplicationContextAware {
private static ApplicationContext context = null;
@Override
public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
this.context = applicationContext;
}
// 传入线程中
public static <T> T getBean(String beanName) {
return (T) context.getBean(beanName);
}
// 国际化使用
public static String getMessage(String key) {
return context.getMessage(key, null, Locale.getDefault());
}
/// 获取当前环境
public static String getActiveProfile() {
return context.getEnvironment().getActiveProfiles()[0];
}
}

String activeProfile = SpringContextUtil.getActiveProfile();

  String ip= InetAddress.getLocalHost().getHostAddress();

public String getIpv4IP() {
StringBuilder result = new StringBuilder();
BufferedReader in = null;
try {
URL realUrl = new URL("https://www.taobao.com/help/getip.php");
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
} catch (Exception e) {
// log.error("获取ipv4公网地址异常");
e.printStackTrace();
} finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
String str = result.toString().replace("ipCallback({ip:", "");
String ipStr = str.replace("})", "");
return ipStr.replace('"', ' ');
}