如何确定接口值的“real”类型？{}

你也可以做类型切换：

switch v := myInterface.(type) {case int:    // v is an int here, so e.g. v + 1 is possible.    fmt.Printf("Integer: %v", v)case float64:    // v is a float64 here, so e.g. v + 1.0 is possible.    fmt.Printf("Float64: %v", v)case string:    // v is a string here, so e.g. v + " Yeah!" is possible.    fmt.Printf("String: %v", v)default:    // And here I'm feeling dumb. ;)    fmt.Printf("I don't know, ask stackoverflow.")}