golang 如何使用反射访问私有字段和方法

import (
    "reflect"
)

type StructWithPrivateField struct {
    somePrivateField string
}

func main() {
    v := reflect.ValueOf(StructWithPrivateField{})
    field := v.FieldByName("somePrivateField")
    println(field.String()) // 输出: ""
}

import (
    "reflect"
)

type StructWithPrivateMethod struct {
    somePrivateMethod func()
}

func main() {
    v := reflect.ValueOf(StructWithPrivateMethod{})
    method := v.MethodByName("somePrivateMethod")
    method.Call(nil) // 调用方法
}

import (
    "reflect"
    "testing"
)

type Account struct {
    name    string
    balance float64
}

func (acc *Account) Deposit(amount float64) {
    acc.balance += amount
}

func (acc *Account) GetBalance() float64 {
    return acc.balance
}

func TestAccount(t *testing.T) {
    acc := &Account{name: "Test account"}
    v := reflect.ValueOf(acc)

    // 设置私有字段值
    balanceField := v.FieldByName("balance")
    balanceField.SetFloat(1000.00)

    // 调用私有方法
    depositMethod := v.MethodByName("Deposit")
    depositMethod.Call([]reflect.Value{reflect.ValueOf(500.00)})

    balance := acc.GetBalance()
    if balance != 1500.00 {
        t.Errorf("Expected balance to be 1500, got %f", balance)
    }
}