1、select实现的超时机制
示例：
package main
import (
"fmt"
"time"
)
func main() {
ch := make(chan int)
quit := make(chan bool)
//新开一个协程
go func() {
for {
select {
case num := <-ch:
fmt.Println("num = ", num)
case <-time.After(3 * time.Second):
fmt.Println("超时")
quit <- true
}
}
}() //别忘了()
for i := 0; i < 5; i++ {
ch <- i
time.Sleep(time.Second)
}
<-quit
fmt.Println("程序结束")
}
执行结果：
num = 0 num = 1 num = 2 num = 3 num = 4 超时 程序结束