用户购买功能实现

novel-front/src/main/java/com/java2nb/novel/controller/BookController.java

@@ -116,7 +116,11 @@ public class BookController extends BaseController{
     public ResultBean queryBookIndexAbout(Long bookId,Long lastBookIndexId) {
         Map<String,Object> data = new HashMap<>(2);
         data.put("bookIndexCount",bookService.queryIndexCount(bookId));
-        data.put("lastBookContent",bookService.queryBookContent(lastBookIndexId).getContent().substring(0,42));
+        String lastBookContent = bookService.queryBookContent(lastBookIndexId).getContent();
+        if(lastBookContent.length()>42){
+            lastBookContent=lastBookContent.substring(0,42);
+        }
+        data.put("lastBookContent",lastBookContent);
         return ResultBean.ok(data);
     }
 
@@ -161,4 +165,6 @@ public class BookController extends BaseController{
 
 
 
+
+
 }