如何在tomcat中防止数组重置？

// 设置Session属性
HttpSession session = request.getSession();
session.setAttribute("myArray", myArray);

// 获取Session属性
myArray = (String[]) session.getAttribute("myArray");

// 假设有一个User类和一个UserDAO类
User user = userDAO.getUserById(userId);
String[] myArray = user.getMyArray();

// 使用Jedis客户端连接Redis
Jedis jedis = new Jedis("localhost");
jedis.set("myArray:" + userId, Arrays.toString(myArray));

// 获取数据
String arrayString = jedis.get("myArray:" + userId);
myArray = Arrays.stream(arrayString.split(",")).toArray(String[]::new);

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.Arrays;

@WebServlet("/array")
public class ArrayServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        HttpSession session = request.getSession();
        String[] myArray = (String[]) session.getAttribute("myArray");

        if (myArray == null) {
            myArray = new String[]{"item1", "item2", "item3"};
            session.setAttribute("myArray", myArray);
        }

        response.getWriter().println("My Array: " + Arrays.toString(myArray));
    }
}