@WebServlet(name = "httpServletDemo",
        urlPatterns = "/httpServletDemo",
        initParams = {
        @WebInitParam(name = "name", value = "username"),
        @WebInitParam(name = "mobile", value = "1232423434")
})
@Controller
public class HttpServletDemo extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String name = getInitParameter("name");
        String mobile = getInitParameter("mobile");
        System.out.println("name:"+name+"; mobile:"+mobile);
        resp.getWriter().print("this is a demo");
        resp.setStatus(200);
    }

    @Override
    protected long getLastModified(HttpServletRequest req) {
        return super.getLastModified(req);
    }

    @Override
    protected void doHead(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doHead(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPost(req, resp);
    }

    @Override
    protected void doPut(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPut(req, resp);
    }

    @Override
    protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doDelete(req, resp);
    }

    @Override
    protected void doOptions(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doOptions(req, resp);
    }

    @Override
    protected void doTrace(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doTrace(req, resp);
    }

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.service(req, resp);
    }

    @Override
    public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
        String name = getInitParameter("name");
        String mobile = getInitParameter("mobile");
        System.out.println("name:"+name+"; mobile:"+mobile);
        super.service(req, res);
    }
}

spring boot 启动类

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@SpringBootApplication
@EnableEurekaClient
@ServletComponentScan(basePackages = {"com.example.demo.filter","com.example.demo.interceptor","com.example.demo.servlet"})
public class SpringWebDemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringWebDemoApplication.class, args);
    }
}

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