update

book-dao/src/main/java/com/book/dao/VO/BookContentVO.java

@@ -7,6 +7,9 @@ import java.io.Serializable;
 @Data
 public class BookContentVO implements Serializable {
     private static final long serialVersionUID = 229935419604844370L;
+    /**
+     * 用户 Id
+     */
     Long userId;
     Long bookId;
     Long contentId;

book-server/src/main/java/com/book/server/advice/ExceptionAdvice.java

@@ -26,7 +26,7 @@ public class ExceptionAdvice {
     @ExceptionHandler
     public Result exceptionHandle(Exception e) {
         e.printStackTrace();
-        log.error("系统异常：{}", e.toString());
+        log.error("系统异常：", e);
         return Result.failure(ResultCode.UNKNOWN.ordinal(), e.getMessage());
     }
 }

book-server/src/main/java/com/book/server/controller/WxPayController.java

@@ -67,7 +67,7 @@ public class WxPayController extends BaseController {
     /**
      * 跳转中间页
      *
-     * @param userId
+     * @param userId 用户 id
      * @param code
      * @param state
      * @return