https://blog.youkuaiyun.com/qq_45016922zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/qq_45016922/article/details/166143300https://blog.youkuaiyun.com/qq_45016922/article/details/166143300qq_45016922Mon, 21 Sep 2026 00:39:07 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/165352999https://blog.youkuaiyun.com/qq_45016922/article/details/165352999qq_45016922Mon, 14 Sep 2026 19:38:48 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/165003742https://blog.youkuaiyun.com/qq_45016922/article/details/165003742qq_45016922Fri, 11 Sep 2026 17:35:08 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/164413302https://blog.youkuaiyun.com/qq_45016922/article/details/164413302qq_45016922Sun, 06 Sep 2026 03:50:31 +0800,第三个参数Class Type传进来的是一个实体类对应的class类，即Shop.class等，第四个参数Function dbFallback传入的是一个函数，ID是参数类型，R是返回值类型，在第四步根据id查询数据库中用到，使用apply()方法调用这个传进来的函数。锁释放的动作就是将这个lock在redis中删除。]]>https://blog.youkuaiyun.com/qq_45016922/article/details/164341877https://blog.youkuaiyun.com/qq_45016922/article/details/164341877qq_45016922Fri, 04 Sep 2026 00:36:25 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/164336317https://blog.youkuaiyun.com/qq_45016922/article/details/164336317qq_45016922Thu, 03 Sep 2026 16:48:50 +0800，就可以解决这个问题。注意：resultType需要的类型是单条记录所封装的类型，如果mapper中返回的是一个list，则resultType要设置为List中的数据类型。传入的参数Emp是一个实体类，里面的属性要和数据库的emp表的字段一一对应，占位符中写的是Emp的属性名。]]>https://blog.youkuaiyun.com/qq_45016922/article/details/164297431https://blog.youkuaiyun.com/qq_45016922/article/details/164297431qq_45016922Wed, 02 Sep 2026 14:48:06 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/164267077https://blog.youkuaiyun.com/qq_45016922/article/details/164267077qq_45016922Tue, 01 Sep 2026 19:29:51 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/164163047https://blog.youkuaiyun.com/qq_45016922/article/details/164163047qq_45016922Sat, 29 Aug 2026 06:55:25 +0800前后参数的形式一致，就可以使用实例方法引用。如果某个lambda表达式里只是调用一个静态方法，并且->前后参数的形式一致，就可以使用静态方法引用。注意：lambda表达式并不是可以简化全部的匿名内部类，lambda只能替代函数式接口的匿名内部类。]]>https://blog.youkuaiyun.com/qq_45016922/article/details/164163045https://blog.youkuaiyun.com/qq_45016922/article/details/164163045qq_45016922Sat, 29 Aug 2026 06:54:44 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/164133163https://blog.youkuaiyun.com/qq_45016922/article/details/164133163qq_45016922Fri, 28 Aug 2026 04:06:48 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/164107770https://blog.youkuaiyun.com/qq_45016922/article/details/164107770qq_45016922Thu, 27 Aug 2026 06:01:48 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/164006035https://blog.youkuaiyun.com/qq_45016922/article/details/164006035qq_45016922Mon, 24 Aug 2026 02:23:06 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/163982662https://blog.youkuaiyun.com/qq_45016922/article/details/163982662qq_45016922Sun, 23 Aug 2026 00:29:12 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/163950535https://blog.youkuaiyun.com/qq_45016922/article/details/163950535qq_45016922Fri, 21 Aug 2026 17:00:27 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/163821079https://blog.youkuaiyun.com/qq_45016922/article/details/163821079qq_45016922Mon, 17 Aug 2026 12:26:31 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/163768111https://blog.youkuaiyun.com/qq_45016922/article/details/163768111qq_45016922Sat, 15 Aug 2026 03:37:36 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/163678497https://blog.youkuaiyun.com/qq_45016922/article/details/163678497qq_45016922Wed, 12 Aug 2026 02:16:43 +0800https://blog.youkuaiyun.com/qq_45016922/article/details/163642315https://blog.youkuaiyun.com/qq_45016922/article/details/163642315qq_45016922Mon, 10 Aug 2026 17:29:24 +0800>在Service层的DishServiceImpl类中，将categoryId和状态包装成一个dish对象，然后传入Mapper层，用这个dish对象来进行查询在mapper层的DishMapper.xml文件中，使用Mybatis来进行查询注意：mybatis中where标签的语句要加and（不用加逗]]>https://blog.youkuaiyun.com/qq_45016922/article/details/163642300https://blog.youkuaiyun.com/qq_45016922/article/details/163642300qq_45016922Mon, 10 Aug 2026 17:28:25 +0800