1.Spring Cache介绍
2.常用注解
静态设置key
@CachePut(cacheNames = "userCache" key = "abc")//如果使用Sspring Cache缓存数据，key的生成: userCache : : abc
动态设置key
UserController中插入
写法一：
CachePut( cacheMames = "userCache" key = “#user.id")//如果使用Spring Cache缓存数据，key的生成:userCache..abc
public User save(@RequestBody User user){
写法二：
/@CachePut(cacheNames = "usercache" ,key = " #result.id")//对象导航
写法三：
` @CachePut( cacheNames = “userCache” , key = “#po.id”)`
写法四：
(@CachePut( cacheNames = "userCache" , key = "#a0.id")
写法五：
@CachePut(cacheNames = "userCache" ,key = " #root.args[0].id")
Mapper中代码
插入
@Insert("insert into user(name,age) values ( #{name}, {age})")
@options(useGeneratedKeys = true,keyProperty = "id") void insert(User user);
查找
@GetMapping v @Cacheable(cacheNames = "userCache" , key = "#id") / / key的生成: userCache ::10
public User getById(Long id){ User user = userMapper.getById(id);" return user};
删除
@DeleteMappingv @CacheEvict(cacheNames = "userCache" ,key = "#id") // key的生成:userCache::1d]
public void deleteById(Long id){ userMapper.deleteById( id); }
删除全部
@DeleteMapping("/ delAll") @CacheEvict(cacheNames = "userCache",allEntries = true)
public void deleteAll(){ userMapper.deleteAl1(); }