refactor: convert all timestamps from milliseconds to seconds

- Modified LessonTask entity timestamps
- Updated UserService timestamp handling
- Adjusted JWT token timestamp generation
- Updated TokenBlacklistService to use seconds

src/main/java/com/huertian/jinduguanli/entity/LessonTask.java

@@ -51,7 +51,7 @@ public class LessonTask implements Serializable {
         logger.info("创建新课程任务 - 课程名称: {}, 小课名称: {}, 用户ID: {}", 
             this.courseName, this.microLessonName, this.userId);
         progressStatus = 1;
-        long now = System.currentTimeMillis();
+        long now = System.currentTimeMillis() / 1000;
         createdAt = now;
         updatedAt = now;
         logger.info("创建课程任务成功 - 进度状态: {}, 创建时间: {}, 更新时间: {}", 
@@ -62,7 +62,7 @@ public class LessonTask implements Serializable {
     protected void onUpdate() {
         logger.info("更新课程任务 - ID: {}, 课程名称: {}, 小课名称: {}", 
             this.id, this.courseName, this.microLessonName);
-        updatedAt = System.currentTimeMillis();
+        updatedAt = System.currentTimeMillis() / 1000;
         logger.info("更新课程任务成功 - ID: {}, 更新时间: {}", id, updatedAt);
     }
 }

src/main/java/com/huertian/jinduguanli/security/service/JwtService.java

@@ -46,8 +46,8 @@ public class JwtService {
     }
 
     public String generateToken(Map<String, Object> extraClaims, UserDetails userDetails) {
-        Date issuedAt = new Date(System.currentTimeMillis());
-        Date expiration = new Date(System.currentTimeMillis() + jwtExpiration);
+        Date issuedAt = new Date(System.currentTimeMillis() / 1000 * 1000);
+        Date expiration = new Date((System.currentTimeMillis() / 1000 + jwtExpiration / 1000) * 1000);
         logger.debug("Generating token for user: {}, expiration: {}, jwtExpiration: {}", userDetails.getUsername(),
                 expiration, jwtExpiration);
 

src/main/java/com/huertian/jinduguanli/security/service/TokenBlacklistService.java

@@ -22,15 +22,15 @@ public class TokenBlacklistService {
      * 将令牌添加到黑名单
      * 
      * @param token      JWT令牌
-     * @param expiration 过期时间（毫秒）
+     * @param expiration 过期时间（秒）
      */
     public void addToBlacklist(String token, long expiration) {
-        logger.info("将令牌加入黑名单 - 过期时间: {}", new Date(expiration));
+        logger.info("将令牌加入黑名单 - 过期时间: {}", new Date(expiration * 1000));
         try {
             String key = BLACKLIST_PREFIX + token;
-            long ttl = expiration - System.currentTimeMillis();
+            long ttl = expiration - System.currentTimeMillis() / 1000;
             if (ttl > 0) {
-                redisTemplate.opsForValue().set(key, "blacklisted", ttl, TimeUnit.MILLISECONDS);
+                redisTemplate.opsForValue().set(key, "blacklisted", ttl, TimeUnit.SECONDS);
                 logger.info("令牌已成功加入黑名单");
             } else {
                 logger.warn("令牌已过期，无需加入黑名单");

src/main/java/com/huertian/jinduguanli/service/UserService.java

@@ -76,8 +76,8 @@ public class UserService implements UserDetailsService {
         user.setJobs(request.getJobs());
         user.setCreatorId(request.getCreatorId());
         user.setStatus(1);
-        user.setCreatedAt(System.currentTimeMillis());
-        user.setUpdatedAt(System.currentTimeMillis());
+        user.setCreatedAt(System.currentTimeMillis() / 1000);
+        user.setUpdatedAt(System.currentTimeMillis() / 1000);
 
         userRepository.save(user);
 
@@ -158,8 +158,8 @@ public class UserService implements UserDetailsService {
         // 加密密码
         user.setPassword(passwordEncoder.encode(user.getPassword()));
         user.setStatus(1);
-        user.setCreatedAt(System.currentTimeMillis());
-        user.setUpdatedAt(System.currentTimeMillis());
+        user.setCreatedAt(System.currentTimeMillis() / 1000);
+        user.setUpdatedAt(System.currentTimeMillis() / 1000);
 
         // 保存用户
         User savedUser = userRepository.save(user);

src/main/java/com/huertian/jinduguanli/utils/JwtUtil.java

@@ -88,8 +88,8 @@ public class JwtUtil {
             String token = Jwts.builder()
                     .setClaims(claims)
                     .setSubject(userName)
-                    .setIssuedAt(new Date(System.currentTimeMillis()))
-                    .setExpiration(new Date(System.currentTimeMillis() + jwtExpiration))
+                    .setIssuedAt(new Date(System.currentTimeMillis() / 1000 * 1000))
+                    .setExpiration(new Date((System.currentTimeMillis() / 1000 + jwtExpiration / 1000) * 1000))
                     .signWith(getSignKey(), SignatureAlgorithm.HS384)
                     .compact();
             logger.debug("token创建成功");