# 具体遇到的问题
   用h1标签输出时，浏览器显示 蓝色的 book , 用 h2-h5输出时，浏览器就输出

    <h5 style='color:blue'>book</h5>

# 报错信息的截图
    
# 相关课程内容截图

# 尝试过的解决思路和结果

# 粘贴全部相关代码，切记添加代码注释（请勿截图）

在这里输入代码，可通过选择【代码语言】突出显示

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 ShopServlet extends HttpServlet {

@Override

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

// TODO Auto-generated method stub

// localhost:8080/Servlet/query?category=book

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

String html="<h1 style='color:blue'>"+category+"</h1>";

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

PrintWriter out=response.getWriter();

out.println(html);

}

    

}

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

  <display-name>Servlet</display-name>

  <welcome-file-list>

    <welcome-file>index.html</welcome-file>

    <welcome-file>index.htm</welcome-file>

    <welcome-file>index.jsp</welcome-file>

    <welcome-file>default.html</welcome-file>

    <welcome-file>default.htm</welcome-file>

    <welcome-file>default.jsp</welcome-file>

  </welcome-file-list>

 <servlet>

    <servlet-name>query</servlet-name>

    <servlet-class>com.imooc.servlet.ShopServlet</servlet-class>

 </servlet>

 <servlet-mapping>

    <servlet-name>query</servlet-name>

    <url-pattern>/query</url-pattern>

 </servlet-mapping>

</web-app>