请教 Go 用反射修改结构体的值的问题 - V2EX
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jonathanchoo

请教 Go 用反射修改结构体的值的问题

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  •   jonathanchoo Jan 14, 2021 2019 views
    This topic created in 1971 days ago, the information mentioned may be changed or developed.

    如果是普通的结构体,遍历 numField 根据 Field(i).Name 修改就可以了

    但是如果遇到嵌套结构体怎么办

    例如

    type A struct { field1 string ... B } type B struct { field2 string } 

    如何修改修改 field2 的值呢?

    2 replies    2021-01-14 17:42:26 +08:00
    notamail
        1
    notamail  
       Jan 14, 2021
    1. 你这并不是嵌套结构体。。。
    2. 这种结构可以考虑用 map 来处理
    joesonw
        2
    joesonw  
       Jan 14, 2021
    1. 私有变量改不了的.
    2. struct 也是修改不了, 要 *B


    type A struct {
    Field1 string
    *B
    }

    type B struct {
    Field2 string
    }

    func main() {
    a := A{B: &B{Field2: "123"}}
    println(a.B.Field2)
    v := reflect.ValueOf(&a)
    v.Elem().FieldByName("B").Elem().FieldByName("Field2").Set(reflect.ValueOf("456"))
    println(a.B.Field2)
    }



    https://play.golang.org/p/dJ5sWunyVby
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