添加用户 Id 为空判断

book-server/src/main/java/com/book/server/common/entity/ResultCode.java

@@ -10,6 +10,7 @@ public enum ResultCode {
     IDEXIST(10001, "书籍 ID 已存在"),
     PARAMERROR(10002, "参数错误"),
     ORDER_FAIL(10003, "下单失败"),
+    USER_NULL(10004, "用户 ID 不能为 null"),
     ;
 
     private Integer code;

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

@@ -136,6 +136,9 @@ public class BookController extends BaseController {
      */
     @PostMapping("/content")
     public Result<BookContent> getBookContentByChapter(@RequestBody BookContentVO bookContentVO) {
+        if (bookContentVO.getUserId() == null) {
+            return Result.failure(ResultCode.USER_NULL);
+        }
         return bookService.getContentByContentId(bookContentVO);
     }