在组合框中添加默认值的正确代码是什么？

<select id="mySelect">
  <option value="default">Default Value</option>
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
</select>

<script>
  document.getElementById("mySelect").value = "default";
</script>

from django import forms

class MyForm(forms.Form):
    my_choices = (
        ('default', 'Default Value'),
        ('option1', 'Option 1'),
        ('option2', 'Option 2'),
    )
    my_select = forms.ChoiceField(choices=my_choices, initial='default')

import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MyController {
    @ModelAttribute("mySelect")
    public String[] getMySelect() {
        return new String[]{"default", "option1", "option2"};
    }
    
    @RequestMapping("/")
    public String index() {
        return "index";
    }
}