go语言结构体数组赋值 go 结构体数组遍历

package main

import (
	"fmt"
	"reflect"
	"strings"
)

type Student struct {
	Name string
	Age  int
	Addr string
}

// 遍历结构体, 只遍历，不做修改
func forStruct_1() {
	s := Student{Name: "admin", Age: 18, Addr: "china"}
	v := reflect.ValueOf(s)
	typeOfS := v.Type()

	for i := 0; i < v.NumField(); i++ {
		fmt.Printf("Field: %s, Value: %s\n", typeOfS.Field(i).Name, v.Field(i).Interface())
	}
	fmt.Printf("%+v\n", s)
}

// 遍历结构体, 遍历同时做修改
func forStruct_2() {
	s := Student{Name: "admin", Age: 18, Addr: "china"}
	v := reflect.ValueOf(&s) // 想要修改结构体的值，这里必须传指针
	typeOfS := v.Type().Elem()

	for i := 0; i < v.Elem().NumField(); i++ { // 无法使用v.NumField, 需要改为v.Elem().NumField()
		fmt.Printf("Field: %s, Value: %s\n", typeOfS.Field(i).Name, v.Elem().Field(i).Interface())

		if typeOfS.Field(i).Name == "Name" {
			v.Elem().Field(i).SetString("Admin2") // 修改Name字段的值
		}
	}
	fmt.Printf("%+v\n", s)
}

func main() {
	fmt.Println(strings.Repeat("=", 80))
	forStruct_1()
	fmt.Println(strings.Repeat("=", 80))
	forStruct_2()
}

life is a game