go 空通道交互数据

		var strChan chan string
		strChan = make(chan string)

		go func() {
			select {
			case str := <-strChan:
				fmt.Println("get string:",str)
			}
		}()

		time.Sleep(1*time.Second)

		select {
		case strChan <- "aaa":
			fmt.Println("put string.")
		default:
		}

put string.
get string: aaa