027_go语言中的通道选择器
代码演示
package main
import "fmt"
import "time"
func main() {
c1 := make(chan string)
c2 := make(chan string)
go func() {
time.Sleep(time.Second * 1)
c1 <- "one"
}()
go func() {
time.Sleep(time.Second * 2)
c2 <- "two"
}()
for i := 0; i < 2; i++ {
select {
case msg1 := <-c1:
fmt.Println("received", msg1)
case msg2 := <-c2:
fmt.Println("received", msg2)
}
}
}
代码运行结果
received one received two
代码解读
- go语言的通道选择器(select)可以同时等待多个通道操作
- 以上例子就是利用关键字select同时等待创建的两个通道的值
- 对于select语句而言,它会不断的检测通道是否有值传过来,一旦发现传过来,立刻获取并输出

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