利用golang实现封装trycatch异常处理实例代码

package main import ( "reflect") type TryCatch struct { errChan  chan interface{} catches  map[reflect.Type]func(err error) defaultCatch func(err error)} func (t TryCatch) Try(block func()) TryCatch { t.errChan = make(chan interface{}) t.catches = map[reflect.Type]func(err error){} t.defaultCatch = func(err error) {} go func() { defer func() { t.errChan <- recover() }() block() }() return t} func (t TryCatch) CatchAll(block func(err error)) TryCatch { t.defaultCatch = block return t} func (t TryCatch) Catch(e error, block func(err error)) TryCatch { errorType := reflect.TypeOf(e) t.catches[errorType] = block return t} func (t TryCatch) Finally(block func()) TryCatch { err := <-t.errChan if err != nil { catch := t.catches[reflect.TypeOf(err)] if catch != nil { catch(err.(error)) } else { t.defaultCatch(err.(error)) } } block() return t} type MyError struct { error} func main() { TryCatch{}.Try(func() { println("do something buggy") panic(MyError{}) }).Catch(MyError{}, func(err error) { println("catch MyError") }).CatchAll(func(err error) { println("catch error") }).Finally(func() { println("finally do something") }) println("done")}