如何在WebApplicationInitializer中以编程方式注册多个servlets？

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

public class MyWebApplicationInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        // 注册Servlet1
        ServletRegistration.Dynamic servlet1 = servletContext.addServlet("servlet1", Servlet1.class);
        servlet1.addMapping("/servlet1");

        // 注册Servlet2
        ServletRegistration.Dynamic servlet2 = servletContext.addServlet("servlet2", Servlet2.class);
        servlet2.addMapping("/servlet2");

        // 注册Servlet3
        ServletRegistration.Dynamic servlet3 = servletContext.addServlet("servlet3", Servlet3.class);
        servlet3.addMapping("/servlet3");

        // 其他servlets...

        // 设置初始化参数（可选）
        servlet1.setInitParameter("param1", "value1");
        servlet2.setInitParameter("param2", "value2");
        servlet3.setInitParameter("param3", "value3");
    }
}