spring 缓存

1.spring缓存注解,可以丢在controller,也可以丢在service,也可以丢在mapper。

2.手动操作缓存使用:

    @Autowired
    private CacheManager cacheManager;

3.添加缓存

//添加缓存
@Override
@Cacheable(cacheNames = "test", key = "'test_model' + #id",unless="#result == null") //如果结果为空,不缓存
public TestModel selectByIdCache(Long id) {
    return baseMapper.selectById(id);
}
//等于代码:
@Override
public TestModel selectByIdCache(Long id) {
    TestModel model baseMapper.selectById(id);
    if(model!=null){//如果结果为空,不缓存
    	Cache cache = cacheManager.getCache("test");
    	cache.put("test_model"+id,model);
    }
    return model;
}

4.删除缓存

//注解删除缓存
@CacheEvict(cacheNames = "test", key = "'test_model' + #bo.id")
@Override
public Boolean updateByBo(TestModelBo bo) {
}
//等于代码:
@Override
public Boolean updateByBo(TestModelBo bo) {
	Cache cache = cacheManager.getCache("test");
    cache.evict("test_model"+bo.getId());
}

5.清空缓存

//注解清空缓存
@CacheEvict(cacheNames = "test", allEntries = true)
@Override
public Boolean deleteWithValidByIds(Collection<Long> ids, Boolean isValid) {
}
//等于代码:
@Override
public Boolean deleteWithValidByIds(Collection<Long> ids, Boolean isValid) {
	Cache cache = cacheManager.getCache("test");
    cache.clear();
}

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