springboot如何注入servlet

package com.xxx.secondboot.servlet;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class TestServlet extends HttpServlet {    private static final long serialVersionUID = -4619665430596950563L;  @Override  protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {    System.out.println("zhaojigang servlet");  }  @Override  protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {    this.doGet(req, resp);  }}