release- 生成uuid时存入缓存，生成二维码时也校验是否有缓存

luoo_user/src/main/java/com/luoo/user/controller/LoginController.java

@@ -400,6 +400,7 @@ public class LoginController extends BaseController {
 	@GetMapping(value = "/uuid")
 	public Result<String> getUuid() {
 		String uuid = UUID.randomUUID().toString();
+		redisTemplate.opsForValue().set(uuid, 0, 60, TimeUnit.SECONDS);
 		return Result.success(uuid);
 	}
 
@@ -419,11 +420,20 @@ public class LoginController extends BaseController {
 		response.setContentType("image/jpeg");
 
 		try {
+
+			Object o = redisTemplate.opsForValue().get(uuid);
+			if (o == null) {
+				throw new BizException("二维码失效！");
+			}
+			if(!String.valueOf(o).equals("0")) {
+				throw new BizException("登录认证已完成");
+			}
+
 			response.setHeader("uuid", uuid);
 			// 这里是开源工具类 hutool里的QrCodeUtil
 			// 网址：http://hutool.mydoc.io/
 			QrCodeUtil.generate(uuid, 300, 300, "jpg",response.getOutputStream());
-			redisTemplate.opsForValue().set(uuid, 0, 60, TimeUnit.SECONDS);
+
 		} catch (Exception e) {
 			e.printStackTrace();
 		}

luoo_user/src/main/java/com/luoo/user/service/UserInfoService.java

@@ -715,7 +715,7 @@ public class UserInfoService {
         if (o == null) {
             throw new BizException("二维码失效！");
         }
-        if(!String.valueOf(0).equals("0")) {
+        if(!String.valueOf(o).equals("0")) {
             throw new BizException("登录认证已完成");
         }