输入地址（http://localhost:8088/hi?name=tom）404？

相关代码：

1、配置依赖

<dependencies>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
    </dependency>
</dependencies>

2、书写servlet类

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 {
    public FirstServlet() {
    }

    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        String name = req.getParameter("name");
        String html = "<h1 style='color:red'>h1," + name + "!</h1><hr/>";
        System.out.println("返回给浏览器的响应内容为:" + html);
        PrintWriter out = resp.getWriter();
        out.println(html);
    }
}

3、映射servlet

<servlet>
    <servlet-name>first</servlet-name>
    <servlet-class>com.imooc.servlet.FirstServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>first</servlet-name>
    <url-pattern>/hi</url-pattern>
</servlet-mapping>

结果

相关截图：

但是http://localhost:8088/first/index.html可以访问​