这是我用来重新填充的表格 ArrayList

<form method = "POST" action = "addItemsToTemplate">
    <s:iterator value = "myQuestions" var = "quizItem"  status="key">
        <s:textfield name = "quizItem.question"/> 
    </s:iterator>
    <input type = "submit" value = "submit"/>
</form>

这是动作课

public class QuizTest extends ActionSupport{



    public String execute(){

            List<Question>  q=  myQuestions;
            System.out.println(myQuestions);

            return "success";
        }


   public String populateQuestions(){
             //more code here
   }

    public void setMyQuestions(List<Question> myQuestions) {
        this.myQuestions = myQuestions;
    }
    private List<Question> myQuestions = new ArrayList<Question>();

}

myQuestions问题对象列表在哪里。提交后，这给了我一个错误

Unexpected Exception caught setting 'quizItem.question' on 'class quiz.actions.QuizTemplateAction: Error setting expression 'quizItem.question' with value '[Ljava.lang.String;@1b3409f'

并System.out.println(myQuestions);打印一个空列表。但在提交表单之前，myQuestions已经通过此方法从另一个中填充
populateQuestions()了