Java中有什么东西可以将系统属性的作用域更改为WAR吗？

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class MyServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取ServletContext对象
        ServletContext context = getServletContext();

        // 设置系统属性的值
        context.setAttribute("mySystemProperty", "myValue");

        // 在整个Web应用程序中访问系统属性
        String myValue = (String) context.getAttribute("mySystemProperty");

        // 输出系统属性的值
        response.getWriter().println("System property value: " + myValue);
    }
}