eclipse 的终端显示正常 但是网页总是空白 也没有404错误。不知道是怎么回事

package com.imooc.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class FirstServlet extends HttpServlet{

@Override

protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

//接受请求发来的参数

String name =request.getParameter("name");

String html = "<h1 style='color:red' hi,"+ name + "!</h1><hr/>";

System.out.println("返回给浏览器的响应数据为："+html);

PrintWriter out = response.getWriter();

out.println(html);//将html发送回浏览器

}

}

老师，您辛苦了。我的回答的框进不了。无奈下，只能再次提问