org.hibernate.hql.ast.QuerySyntaxException: Path expected for join!

HQL進行JOIN連線查詢時需要注意幾點：

1.HQL不支援ON，需要將ON換成WHERE

2.需要註明物件之間的對映關係

Product.hbm.xml對映檔案如下：

<one-to-one name="book" class="com.entity.Book" fetch="join"/>

Product類中需要有

private Book book;

HQL語句：

String hql = "select new com.entity.BookInfo(p.id,p.productName,p.fixedPrice,p.dangPrice,p.addTime," +
     "b.author,b.publishing,b.publishTime,b.catalogue,p.productPic)"+
         "from Product p, Book b where p.id=b.id and b.publishTime=(" +
         "select max(b.publishTime) from Product p join p.book b where p.id=b.id)";