只实现了单机版连接

options.go

@@ -0,0 +1,35 @@
+package redisx
+
+type redisOption struct {
+	addr     string
+	password string
+	db       int
+	poolSize int
+}
+
+func defaultOptions() redisOption {
+	return redisOption{
+		addr: "localhost:6379",
+	}
+}
+
+type Option func(*redisOption)
+
+// 127.0.0.1:6379
+func SetAddress(addr string) Option {
+	return func(o *redisOption) {
+		o.addr = addr
+	}
+}
+
+func SetPassword(password string) Option {
+	return func(o *redisOption) {
+		o.password = password
+	}
+}
+
+func SetDb(db int) Option {
+	return func(o *redisOption) {
+		o.db = db
+	}
+}