go-cache 介绍
go-cache 是 Go 语言实现的一个内存中的缓存框架，实现 Key-Value 的序列存储。
示例代码：
import "github.com/pmylund/go-cache"
// Create a cache with a default expiration time of 5 minutes, and which
// purges expired items every 30 seconds
c := cache.New(5*time.Minute, 30*time.Second)
// Set the value of the key "foo" to "bar", with the default expiration time
c.Set("foo", "bar", 0)
// Set the value of the key "baz" to "yes", with no expiration time
// (the item won't be removed until it is re-set, or removed using
// c.Delete("baz")
c.Set("baz", "yes", -1)
// Get the string associated with the key "foo" from the cache
foo, found := c.Get("foo")
if found {
fmt.Println(foo)
}