整合Mybatis、Servlet、Mysql、Axios、Filter、Session写一个入门级项目：非常适合初接触JavaWeb的小白白来进阶

写在前言

写作收获&目的

本篇文章结构大体还是和上篇文章 Mybatis+Servlet+Mysql 整合的一个小项目一致，但增加了axios、Filter、session。

在数据库层面涉及到了增、查、改，一个代码量不算多的小项目，但十分有助于初学者的学习。

博主在编写项目的同时，发现自己对Axios、Filter的理解并不好，通过本项目，打扎实了自己的基础。

开发此小项目之前，我对同学说，我异步请求用的很少，殊不知自己一直在用异步请求，反而同步请求用的很少很少了。

在编写项目之时，被axios post传参困扰了很久很久，最后终于通过查询CSDN找到了自己想要的答案。

目录结构

1 依赖配置

1.1 创建一个Web项目

不会的可以看这篇文章【Tomcat】贰-Tomcat集成到Idea

1.2 Pom.xml

还是和往常一样分析一下需要用到哪些依赖。

上文中提到了Mybatis、Lombok、Mysql、Servlet、Junit，这篇文章也用到了，引入的Filter是Servlet里面的，Axios的引入方式又非Pom.xml。至于JSon，本篇文章没有用到，所以本文章的依赖有：

Mybatis
Lombok
Mysql
Servlet
Junit

友情提示：不要引错了，否则有些类不能使用

<dependencies>
  <dependency>
    <groupId>junitgroupId>
    <artifactId>junitartifactId>
    <version>4.11version>
    <scope>testscope>
  dependency>
  
  <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>javax.servlet-apiartifactId>
      <version>3.1.0version>
      <scope>providedscope>
  dependency>
  
  <dependency>
    <groupId>org.mybatisgroupId>
    <artifactId>mybatisartifactId>
    <version>3.5.7version>
  dependency>
  
  <dependency>
    <groupId>mysqlgroupId>
    <artifactId>mysql-connector-javaartifactId>
    <version>8.0.30version>
  dependency>
  
  <dependency>
    <groupId>com.alibabagroupId>
    <artifactId>fastjsonartifactId>
    <version>1.2.75version>
  dependency>
  
  <dependency>
    <groupId>org.projectlombokgroupId>
    <artifactId>lombokartifactId>
    <version>1.18.24version>
  dependency>
dependencies>

2 配置Mybatis

上文漏掉的，mybatis-config.xml需要放在resource文件夹下。

mybatis-config配置，主要包括两个点：

数据库配置：数据库名称、JDBC、数据库用户名和密码
Mapper：让Mybatis找到Mapper.xml

2.1 Mybatis-config.xml


DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/us80?useSSL=false&serverTimezone=UTC"/>
                <property name="username" value="root"/>
                <property name="password" value="200201203332"/>
            dataSource>
        environment>
    environments>

    <mappers>
        <package name="com/you/web/Mapper"/>
    mappers>
configuration>

2.2 UserMapper.xml

这里的xml文件只是起到了一个绑定接口的作用。如果没有本文件，那么Mybatis是找不到UserMapper的，也就意味着SQl语句不能被执行。


DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.you.web.Mapper.UserMapper">

mapper>

2.3 UserMapper.interface

package com.you.web.Mapper;



import com.you.web.Dept.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

public interface UserMapper {
    @Select("select * from user where user_name = #{user_name} and user_pwd = #{user_pwd}")
    public User selectUserByInfo(@Param("user_name") String user_name, @Param("user_pwd") String user_pwd);
    @Select("select * from user")
    public List<User> queryAllUsers();
    @Insert("insert into user values(null,#{user_name},#{user_pwd},#{user_emil})")
    public boolean registerUser(@Param("user_name") String user_name,@Param("user_pwd") String user_pwd,@Param("user_emil") String user_emil);
    /* 根据用户名查询用户 */

    @Select("select * from user where user_name = #{user_name}")
    public User selectUserByUsername(@Param("user_name") String user_name);
    @Update("update user set user_pwd = #{user_pwd} where user_name = #{user_name}")
    public boolean reviseUserByInfo(@Param("user_name") String user_name, @Param("user_pwd") String user_pwd);
}

3 配置Tomcat

参考本人的文章【Tomcat】贰-Tomcat集成到Idea

4 Servlet类

4.1 ForgetServlet

处理忘记密码业务

package com.you.web.Servlet;

import com.you.web.Dept.User;
import com.you.web.Mapper.UserMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;

@WebServlet(urlPatterns = "/ForgetServlet")
public class ForgetServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username = req.getParameter("username");
        String password = req.getParameter("password");


        /* 2、连接数据库 */
        String resource = "mybatis-config.xml";
        InputStream inputStream = null;
        inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        /* 3、执行SQL语句 */
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        boolean user = mapper.reviseUserByInfo(username, password);
        resp.setContentType("text/html;charset=UTF-8");
        PrintWriter writer = resp.getWriter();
        if(user)
        {
            //提交
            sqlSession.commit();
            writer.write("true");
        }else{
            writer.write("false");
        }
    }

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

4.2 LoginServlet

处理登录业务的

package com.you.web.Servlet;

import com.you.web.Dept.User;
import com.you.web.Mapper.UserMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;

@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username = req.getParameter("username");
        String password = req.getParameter("password");


        /* 2、连接数据库 */
        String resource = "mybatis-config.xml";
        InputStream inputStream = null;
        inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        /* 3、执行SQL语句 */
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        User user = mapper.selectUserByInfo(username, password);
        resp.setContentType("text/html;charset=UTF-8");
        PrintWriter writer = resp.getWriter();
        if(user != null)
        {
            /* 1、获取Session对象 */
            HttpSession session = req.getSession();
            /* 2、设置Session对象 */
            session.setAttribute("username",username);
            session.setAttribute("password",password);
            writer.write("true");
        }else{
            writer.write("false");
        }
    }

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

4.3 RegisterServlet

处理注册业务

package com.you.web.Servlet;

import com.you.web.Dept.User;
import com.you.web.Mapper.UserMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;

@WebServlet(urlPatterns = "/RegisterServlet")
public class RegisterServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username = req.getParameter("username");
        String password = req.getParameter("password");


        /* 2、连接数据库 */
        String resource = "mybatis-config.xml";
        InputStream inputStream = null;
        inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        /* 3、执行SQL语句 */
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        boolean b = mapper.registerUser(username, password, null);
        resp.setContentType("text/html;charset=UTF-8");
        PrintWriter writer = resp.getWriter();

        if(b == true)
        {
            sqlSession.commit();
            writer.write("true");
        }else{
            writer.write("false");
        }
    }

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

4.4 UserServlet

处理用户名是否存在

package com.you.web.Servlet;

import com.mysql.cj.xdevapi.JsonParser;
import com.you.web.Dept.User;
import com.you.web.Mapper.UserMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;
import java.util.Map;

@WebServlet("/userServlet")
public class UserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        /* 1、获取携带的用户名、密码、邮箱 */
        String username = req.getParameter("username");
        System.out.println("获取的用户名是:"+username);

        /* 2、连接数据库 */
        String resource = "mybatis-config.xml";
        InputStream inputStream = null;
        inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        /* 3、执行SQL语句 */
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        User user = mapper.selectUserByUsername(username);
        resp.setContentType("text/html;charset=UTF-8");
        PrintWriter writer = resp.getWriter();
        if (user!=null)
        System.out.println("user的值是:"+user);
        if(user == null)
        {
            writer.write("true");
        }else{
            writer.write("false");
        }
    }

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


        this.doGet(req,resp);
    }
}

5 Filter类和实体类

5.1 HomeFilter

处理未登录不可访问Home页面的业务

package com.you.web.Filter;


import com.sun.deploy.net.HttpRequest;
import com.sun.deploy.net.HttpResponse;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter("/home.html")
public class HomeFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        System.out.println("放行前");
        /* 1、获取Session对象 */
        HttpServletRequest httpRequest = (HttpServletRequest)request;
        HttpSession session = httpRequest.getSession();
        /* 2、根据名字获取Session */
        Object username = null;
        if(session.getAttribute("username")!=null)
        {
            username = session.getAttribute("username");
        }else{
            System.out.println("我是空的，爱咋咋地！");
        }
        Object password = null;
        if(session.getAttribute("password")!=null)
        {
            password = session.getAttribute("password");
        }else{
            System.out.println("我是空的，爱咋咋地！");
        }
        if(username!=null&&password!=null)
        {
            System.out.println("放行!!!");
            chain.doFilter(request,response);
        }else {
            System.out.println("hey，我要跳转");
            HttpServletResponse httpResponse = (HttpServletResponse) response;
            httpResponse.sendRedirect("http://localhost:8080/JavaWeb_Demo_08_war/prelogin.html");
        }

    }

    @Override
    public void destroy() {

    }
}

5.2 User

package com.you.web.Dept;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString

public class User {
    private Integer user_no;
    private String user_name;
    private String user_pwd;
    private String user_emial;
}

6 静态页面

6.1 error.html

登录失败跳转到的页面
prelogin.html、success.html和该页面都一样，可以换成自己喜欢的

DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="utf-8">
    <title>太空题材404错误页面演示_doweboktitle>

head>

<body>
    <div class="mars">div>

    <img src="images/meteor.svg" class="meteor">
    <p class="title">很抱歉p>
    <p class="subtitle">您输入的用户名或密码错误，请重新登录p>
    <div align="center">
        <a class="btn-back">3秒后将自动跳转到登录页面a>
    div>
    <img src="astronaut.svg" class="astronaut">
    <img src="images/spaceship.svg" class="spaceship">
body>
<script language="javascript" type="text/javascript">

    // 3秒以后再跳转

    setTimeout("javascript:location.href='http://localhost:8080/JavaWeb_Demo_08_war/login.html'", 3000);

script>
<style>
    @keyframes floating {
        from {
            transform: translateY(0px);
        }

        65% {
            transform: translateY(15px);
        }

        to {
            transform: translateY(0px);
        }
    }

    html {
        height: 100%;
    }

    body {
        background-image: url("../images/star.svg"), linear-gradient(to bottom, #05007A, #4D007D);
        height: 100%;
        margin: 0;
        background-attachment: fixed;
        overflow: hidden;
    }

    .mars {
        left: 0;
        right: 0;
        bottom: 0;
        position: absolute;
        height: 27vmin;
        background: url("../images/mars.svg") no-repeat bottom center;
        background-size: cover;
    }

    .logo-404 {
        position: absolute;
        margin-left: auto;
        margin-right: auto;
        left: 0;
        right: 0;
        top: 16vmin;
        width: 30vmin;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .logo-404 {
            top: 45vmin;
        }
    }

    .meteor {
        position: absolute;
        right: 2vmin;
        top: 16vmin;
    }

    .title {
        position: relative;
        z-index: 2;
        color: white;
        font-family: "Nunito", sans-serif;
        font-weight: 600;
        text-align: center;
        font-size: 5vmin;
        margin-top: 31vmin;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .title {
            margin-top: 65vmin;
        }
    }

    .subtitle {
        position: relative;
        z-index: 2;
        color: white;
        font-family: "Nunito", sans-serif;
        font-weight: 400;
        text-align: center;
        font-size: 3.5vmin;
        margin-top: -1vmin;
        margin-bottom: 9vmin;
    }

    .btn-back {
        position: relative;
        z-index: 2;
        border: 1px solid white;
        color: white;
        height: 5vmin;
        padding: 12px;
        font-family: "Nunito", sans-serif;
        text-decoration: none;
        border-radius: 5px;
    }

    .btn-back:hover {
        background: white;
        color: #4D007D;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .btn-back {
            font-size: 3.5vmin;
        }
    }

    .astronaut {
        position: absolute;
        z-index: 1;
        top: 18vmin;
        left: 10vmin;
        height: 30vmin;
        animation: floating 3s infinite ease-in-out;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .astronaut {
            top: 2vmin;
        }
    }

    .spaceship {
        position: absolute;
        z-index: 1;
        bottom: 15vmin;
        right: 24vmin;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .spaceship {
            width: 45vmin;
            bottom: 18vmin;
        }
    }
style>
html>

6.2 home.html

主页

DOCTYPE html>
<html>
<head>
    <style>
        body
        {
            background:url(https://cdn.jsdelivr.net/gh/yw2667899/pic/img/93401075_p0.jpg);
            background-size: cover;
        }
    style>
    
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>简约导航title>
    <meta name="viewport"
          content="width=device-width, initial-scale=1.0, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0" />
    <meta content="telephone=no,email=no" name="format-detection">
    <meta content="yes" name="apple-mobile-web-app-capable">
    <meta name="apple-mobile-web-app-status-bar-style" content="black" />
    <meta name="apple-touch-fullscreen" content="yes" />
    <meta name="keywords" content="网址导航" />
    <meta name="description" content="一个简单美观可自定义的网址导航" />
    <link rel="shortcut icon" href="favicon.ico">
    
    <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/gh/appexplore/jianavi/css/style.css" />
    <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/gh/appexplore/jianavi/css/yidong.css" />
    
head>

<body>


<div class="baidu baidu-2">
    <form name="f" action="https://www.baidu.com/s" target="_blank">
        <div class="Select-box-2" id="baidu">
            <ul>
                <li class="this_s">百 度li>
                <li class="miji_s">多 吉li>
                <li class="bing_s">必 应li>
                <li class="google_s">谷 歌li>
                <li class="baidu_s">百 度li>
            ul>
        div>
        <div class="in5">
            <input name="wd" id="kw-2" maxlength="100" autocomplete="off" type="text">
            <div class="qingkong" id="qingkong" title="清空">xdiv>
        div>
        <input value="搜 索" id="su-2" type="submit">
    form>
    <ul class="keylist">ul>
div>



<div class="body">
    <div class="content">
        <div class="jianjie">
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                <div class="jj-list-tit">影音 · 娱乐div>
                <ul class="jj-list-con">
                    <li><a href="https://www.iqiyi.com/" class="link-3" target="_blank" rel="nofollow">爱奇艺a>li>
                    <li><a href="https://v.qq.com/" class="link-3" target="_blank" rel="nofollow">腾讯视频a>li>
                    <li><a href="https://www.bilibili.com/" class="link-3" target="_blank" rel="nofollow">哔哩哔哩a>
                    li>
                    <li><a href="https://www.mgtv.com/" class="link-3" target="_blank" rel="nofollow">芒果TVa>li>
                    <li><a href="https://www.youku.com/" class="link-3" target="_blank" rel="nofollow">优酷a>li>
                    <li><a href="https://music.163.com/" class="link-3" target="_blank" rel="nofollow">音乐a>li>
                    <li><a href="https://dianying.fm/" class="link-3" target="_blank" rel="nofollow">电影FMa>li>
                    <li><a href="https://www.dikotv.com/" class="link-3" target="_blank" rel="nofollow">顶空影视a>
                    li>
                    <li><a href="http://www.zzzfun.com/" class="link-3" target="_blank" rel="nofollow">ZzzFuna>
                    li>
                ul>
            div>
            <div class="jj-list">
                <div class="jj-list-tit">发现 · 世界div>
                <ul class="jj-list-con">
                    <li><a href="https://news.ifeng.com/" class="link-3" target="_blank" rel="nofollow">凤凰资讯a>
                    li>
                    <li><a href="https://ef.zhiweidata.com/#!/index" class="link-3" target="_blank"
                           rel="nofollow">知微事见a>li>
                    <li><a href="https://sspai.com/" class="link-3" target="_blank" rel="nofollow">少数派a>li>
                    <li><a href="https://jikipedia.com/" class="link-3" target="_blank" rel="nofollow">小鸡词典a>li>
                    <li><a href="https://jandan.net/" class="link-3" target="_blank" rel="nofollow">煎蛋a>li>
                    <li><a href="https://youquhome.com/" class="link-3" target="_blank" rel="nofollow">有趣网址a>li>
                    <li><a href="https://zhuxiao.wiki/" class="link-3" target="_blank" rel="nofollow">注销指南a>
                    li>
                    <li><a href="https://houxu.app/" class="link-3" target="_blank" rel="nofollow">后续a>li>
                    <li><a href="https://ac.scmor.com/" class="link-3" target="_blank" rel="nofollow">思谋学术a>li>
                ul>
            div>
            <div class="jj-list">
                <div class="jj-list-tit">在线 · 工具div>
                <ul class="jj-list-con">
                    <li><a href="https://www.photopea.com/" class="link-3" target="_blank"
                           rel="nofollow">在线修图a>li>
                    <li><a href="https://cowtransfer.com/" class="link-3" target="_blank" rel="nofollow">收发文件a>
                    li>
                    <li><a href="https://cli.im/" class="link-3" target="_blank" rel="nofollow">二维码a>li>
                    <li><a href="https://www.linshiyouxiang.net" class="link-3" target="_blank"
                           rel="nofollow">临时邮箱a>li>
                    <li><a href="https://www.materialtools.com/" class="link-3" target="_blank"
                           rel="nofollow">临时短信a>li>
                    <li><a href="https://convertio.co/zh/" class="link-3" target="_blank" rel="nofollow">格式转换a>
                    li>
                    <li><a href="http://www.hiwenku.com/" class="link-3" target="_blank" rel="nofollow">文档下载a>
                    li>
                    <li><a href="https://weibomiaopai.com/" class="link-3" target="_blank" rel="nofollow">视频下载a>
                    li>
                    <li><a href="https://www.eggvod.cn/music/" class="link-3" target="_blank" rel="nofollow">音乐下载a>
                    li>
                ul>
            div>
            <div class="jj-list">
                <div class="jj-list-tit">搜索 · 资源div>
                <ul class="jj-list-con">
                    <li><a href="https://www.cupfox.com/" class="link-3" target="_blank" rel="nofollow">茶杯狐a>li>
                    <li><a href="https://www.dy2018.com/" class="link-3" target="_blank" rel="nofollow">电影天堂a>li>
                    <li><a href="https://www.coolist.net/" class="link-3" target="_blank" rel="nofollow">酷软清单a>
                    li>
                    <li><a href="https://minapp.com/" class="link-3" target="_blank" rel="nofollow">知晓程序a>li>
                    <li><a href="https://zhengbanxianmian.com/" class="link-3" target="_blank"
                           rel="nofollow">软件限免a>li>
                    <li><a href="https://www.soukuzhan.com/" class="link-3" target="_blank"
                           rel="nofollow">搜酷站a>li>
                    <li><a href="https://www.jiumodiary.com/" class="link-3" target="_blank" rel="nofollow">电子书a>
                    li>
                    <li><a href="https://pan.appts.cn/" class="link-3" target="_blank" rel="nofollow">常用软件a>
                    li>
                    <li><a href="http://www.zimuku.la/" class="link-3" target="_blank" rel="nofollow">字幕库a>li>
                ul>
            div>
        div>
        

        
        
        

        <div class="footer1">Copyright © 2021
            <a href="https://www.appts.cn/" style="color:#ffffff;" target="_blank" rel="nofollow">软件探索 a>
            
            <a href="https://github.com/appexplore/jianavi" style="color:#ffffff;" target="_blank"
               rel="nofollow">开源 a>
        div>
    div>

    <div class="footer">Copyright © 2021
        <a href="https://www.appts.cn/" style="color:#ffffff;" target="_blank" rel="nofollow">软件探索 a>
        
        <a href="https://github.com/appexplore/jianavi" style="color:#ffffff;" target="_blank"
           rel="nofollow">开源 a>
    div>
    
div>


<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/appexplore/jianavi/js/jquery.min.js">script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/appexplore/jianavi/js/js.min.js">script>
body>

html>

6.3 Login.html

涵盖了登录、注册、修改密码的页面

DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport"
          content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>登录title>
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/login.css">
    <link rel="stylesheet" href="css/sign-up-login.css">
    <link rel="stylesheet" type="text/css" href="css/font-awesome.4.6.0.css">
    <link rel="stylesheet" href="css/inputEffect.css"/>
    <link rel="stylesheet" href="css/verifyCode.css"/>
    <link rel="stylesheet" href="css/tooltips.css"/>
    <link rel="stylesheet" href="css/spop.min.css"/>
    <script src="js/jquery-1.10.2.js">script>
    <script src="js/snow.js">script>
    <script src="js/jquery.pure.tooltips.js">script>
    <script src="js/verifyCode.js">script>
    <script src="js/spop.min.js">
    script>
    <script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js">script>
    <script>
        (function () {
            // trim polyfill : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/Trim
            if (!String.prototype.trim) {
                (function () {
                    // Make sure we trim BOM and NBSP
                    var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
                    String.prototype.trim = function () {
                        return this.replace(rtrim, '');
                    };
                })();
            }

            [].slice.call(document.querySelectorAll('input.input__field')).forEach(function (inputEl) {
                // in case the input is already filled..
                if (inputEl.value.trim() !== '') {
                    classie.add(inputEl.parentNode, 'input--filled');
                }

                // events:
                inputEl.addEventListener('focus', onInputFocus);
                inputEl.addEventListener('blur', onInputBlur);
            });

            function onInputFocus(ev) {
                classie.add(ev.target.parentNode, 'input--filled');
            }

            function onInputBlur(ev) {
                if (ev.target.value.trim() === '') {
                    classie.remove(ev.target.parentNode, 'input--filled');
                }
            }
        })();

        $(function () {
            $('#login #login-password').focus(function () {
                $('.login-owl').addClass('password');
            }).blur(function () {
                $('.login-owl').removeClass('password');
            });
            $('#login #register-password').focus(function () {
                $('.register-owl').addClass('password');
            }).blur(function () {
                $('.register-owl').removeClass('password');
            });
            $('#login #register-repassword').focus(function () {
                $('.register-owl').addClass('password');
            }).blur(function () {
                $('.register-owl').removeClass('password');
            });
            $('#login #forget-password').focus(function () {
                $('.forget-owl').addClass('password');
            }).blur(function () {
                $('.forget-owl').removeClass('password');
            });
        });

        function goto_register() {
            $("#register-username").val("");
            $("#register-password").val("");
            $("#register-repassword").val("");
            $("#register-code").val("");
            $("#tab-2").prop("checked", true);
        }

        function goto_login() {
            $("#login-username").val("");
            $("#login-password").val("");
            $("#tab-1").prop("checked", true);
        }

        function goto_forget() {
            $("#forget-username").val("");
            $("#forget-password").val("");
            $("#forget-code").val("");
            $("#tab-3").prop("checked", true);
        }

        function login() {
            var username = $("#login-username").val(),
                password = $("#login-password").val(),
                verifycode = $("#login-verify-code").val(),
                validatecode = null;
            var  paramData = {username:username,password,password};
            axios({
                method: "POST", //请求的方式
                url: 'http://localhost:8080/JavaWeb_Demo_08_war/loginServlet', //请求的路径
                params: paramData
            }).then(res=>{
                if(res.data)
                {
                    window.location.href = 'http://localhost:8080/JavaWeb_Demo_08_war/home.html';
                }else{
                    window.location.href = 'http://localhost:8080/JavaWeb_Demo_08_war/error.html';
                }
            })
        }

        //注册
        function register() {
            var username = $("#register-username").val(),
                password = $("#register-password").val(),
                repassword = $("#register-repassword").val(),
                code = $("#register-code").val(),
                flag = false,
                validatecode = null;
            console.log("拿到的用户名是:" + username);
            var paramData = {username: username};
            axios({
                method: "POST", //请求的方式
                url: 'http://localhost:8080/JavaWeb_Demo_08_war/userServlet', //请求的路径
                params: paramData
            }).then(resp => {
                let results = resp.data;
                if (results == true) {
                    //若可以注册，则访问注册是Servlet
                    var paramData = {username: username,password:password};
                    axios({
                        method: "POST", //请求的方式
                        url: 'http://localhost:8080/JavaWeb_Demo_08_war/RegisterServlet', //请求的路径
                        params: paramData
                    }).then(resp=>{
                        if(resp.data)
                        {
                            window.location.href = 'http://localhost:8080/JavaWeb_Demo_08_war/registerSuccess.html';
                        }
                    })
                } else {

                }
            })
        }

        //重置密码
        function forget() {
            var username = $("#forget-username").val(),
                password = $("#forget-password").val(),
                code = $("#forget-code").val(),
                flag = false,
                validatecode = null;
            /* 1、设置参数 */
            var paramData = {'username':username,'password':password};
            /* 2、发送axios请求 */
            axios({
                method: "POST", //请求的方式
                url: 'http://localhost:8080/JavaWeb_Demo_08_war/ForgetServlet', //请求的路径
                params: paramData
            }).then(res=>{
                if(res.data)
                {
                    /* 1、如果修改成功了，就让其跳转到登录页面 */
                    window.location.href = 'http://localhost:8080/JavaWeb_Demo_08_war/success.html';
                }else{
                    /* 2、自己写着玩吧 */
                }
            })

        }

        /* 以下为我自己写的代码 */
        /* 填完用户名的时候，查询数据库 */
        $(function () {
            $('#register-username').blur(function () {
                /* 查询数据库 */
                var username = $("#register-username").val();
                console.log("拿到的用户名是:" + username);
                var paramData = {username: username};
                axios({
                    method: "POST", //请求的方式
                    url: 'http://localhost:8080/JavaWeb_Demo_08_war/userServlet', //请求的路径
                    params: paramData
                }).then(resp => {
                    let results = resp.data;
                    if (results == true) {

                    } else {
                       alert("用户名已存在，请更换一个")

                    }
                })


            })
        })


    script>
    <style type="text/css">
        html {
            width: 100%;
            height: 100%;
        }

        body {

            background-repeat: no-repeat;

            background-position: center center #2D0F0F;

            background-color: #00BDDC;

            background-image: url(images/snow.jpg);

            background-size: 100% 100%;

        }

        .snow-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 100001;
        }

    style>
head>
<body>

<div class="snow-container">div>

<div id="login">
    <input id="tab-1" type="radio" name="tab" class="sign-in hidden" checked/>
    <input id="tab-2" type="radio" name="tab" class="sign-up hidden"/>
    <input id="tab-3" type="radio" name="tab" class="sign-out hidden"/>
    <div class="wrapper">

        <div class="login sign-in-htm">
            <form class="container offset1 loginform">

                <div id="owl-login" class="login-owl">
                    <div class="hand">div>
                    <div class="hand hand-r">div>
                    <div class="arms">
                        <div class="arm">div>
                        <div class="arm arm-r">div>
                    div>
                div>
                <div class="pad input-container">
                    <section class="content">
<span class="input input--hideo">
<input class="input__field input__field--hideo" value="admin" type="text" id="login-username" autocomplete="off"
       placeholder="请输入用户名" tabindex="1" maxlength="15"/>
<label class="input__label input__label--hideo" for="login-username">
<i class="fa fa-fw fa-user icon icon--hideo">i>
<span class="input__label-content input__label-content--hideo">span>
label>
span>
                        <span class="input input--hideo">
<input class="input__field input__field--hideo" type="password" id="login-password" placeholder="请输入密码" tabindex="2"
       maxlength="15"/>
<label class="input__label input__label--hideo" for="login-password">
<i class="fa fa-fw fa-lock icon icon--hideo">i>
<span class="input__label-content input__label-content--hideo">span>
label>
span>
                        <span class="input input--hideo input--verify_code">
<input class="input__field input__field--hideo" type="text" id="login-verify-code" autocomplete="off"
       placeholder="请输入验证码" tabindex="3" maxlength="4"/>
<label class="input__label input__label--hideo" for="login-verify-code">
<i class="fa fa-fw fa-bell-o icon icon--hideo">i>
<span class="input__label-content input__label-content--hideo">span>
label>
span>
                        <canvas class="verify-code-canvas" id="login-verify-code-canvas">canvas>
                    section>
                div>
                <div class="form-actions">
                    <a tabindex="4" class="btn pull-left btn-link text-muted" onclick="goto_forget()">忘记密码?a>
                    <a tabindex="5" class="btn btn-link text-muted" onclick="goto_register()">注册a>
                    <input class="btn btn-primary" type="button" tabindex="3" onclick="login()" value="登录"
                           style="color:white;"/>
                div>
            form>
        div>

        <div class="login sign-out-htm">
            <form action="#" method="post" class="container offset1 loginform">

                <div id="owl-login" class="forget-owl">
                    <div class="hand">div>
                    <div class="hand hand-r">div>
                    <div class="arms">
                        <div class="arm">div>
                        <div class="arm arm-r">div>
                    div>
                div>
                <div class="pad input-container">
                    <section class="content">
<span class="input input--hideo">
<input class="input__field input__field--hideo" type="text" id="forget-username" autocomplete="off"
       placeholder="请输入用户名"/>
<label class="input__label input__label--hideo" for="forget-username">
<i class="fa fa-fw fa-user icon icon--hideo">i>
<span class="input__label-content input__label-content--hideo">span>
label>

span>
                        <span class="input input--hideo">
<input class="input__field input__field--hideo" type="password" id="forget-password" placeholder="请重置密码"/>
<label class="input__label input__label--hideo" for="forget-password">
<i class="fa fa-fw fa-lock icon icon--hideo">i>
<span class="input__label-content input__label-content--hideo">span>
label>
span>
                    section>
                div>
                <div class="form-actions">
                    <a class="btn pull-left btn-link text-muted" onclick="goto_login()">返回登录a>
                    <input class="btn btn-primary" type="button" onclick="forget()" value="重置密码" style="color:white;"/>
                div>
            form>
        div>

        <div class="login sign-up-htm">
            <form action="#" method="post" class="container offset1 loginform">

                <div id="owl-login" class="register-owl">
                    <div class="hand">div>
                    <div class="hand hand-r">div>
                    <div class="arms">
                        <div class="arm">div>
                        <div class="arm arm-r">div>
                    div>
                div>
                <div class="pad input-container">
                    <section class="content">
<span class="input input--hideo">
<input class="input__field input__field--hideo" type="text" id="register-username" autocomplete="off"
       placeholder="请输入用户名" maxlength="15"/>
<label class="input__label input__label--hideo" for="register-username">
<i class="fa fa-fw fa-user icon icon--hideo">i>
<span class="input__label-content input__label-content--hideo">span>
label>
span>
                        <span class="input input--hideo">
<input class="input__field input__field--hideo" type="password" id="register-password" placeholder="请输入密码"
       maxlength="15"/>
<label class="input__label input__label--hideo" for="register-password">
<i class="fa fa-fw fa-lock icon icon--hideo">i>
<span class="input__label-content input__label-content--hideo">span>
label>
span>
                        <span class="input input--hideo">
<input class="input__field input__field--hideo" type="password" id="register-repassword" placeholder="请确认密码"
       maxlength="15"/>
<label class="input__label input__label--hideo" for="register-repassword">
<i class="fa fa-fw fa-lock icon icon--hideo">i>
<span class="input__label-content input__label-content--hideo">span>
label>
span>

                    section>
                div>
                <div class="form-actions">
                    <a class="btn pull-left btn-link text-muted" onclick="goto_login()">返回登录a>
                    <input class="btn btn-primary" type="button" onclick="register()" value="注册" style="color:white;"/>
                div>
            form>
        div>
    div>
div>
body>
html>

6.4 registerSuccess.html

注册成功跳转的页面

DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="utf-8">
    <title>太空题材404错误页面演示_doweboktitle>

head>

<body>
    <div class="mars">div>

    <img src="images/meteor.svg" class="meteor">
    <p class="title">恭喜您呐！p>
    <p class="subtitle">注册成功了呢！p>
    <div align="center">
        <a class="btn-back">3秒后将自动跳转到登录页面a>
    div>
    <img src="astronaut.svg" class="astronaut">
    <img src="images/spaceship.svg" class="spaceship">
body>
<script language="javascript" type="text/javascript">

    // 3秒以后再跳转

    setTimeout("javascript:location.href='http://localhost:8080/JavaWeb_Demo_08_war/login.html'", 3000);

script>
<style>
    @keyframes floating {
        from {
            transform: translateY(0px);
        }

        65% {
            transform: translateY(15px);
        }

        to {
            transform: translateY(0px);
        }
    }

    html {
        height: 100%;
    }

    body {
        background-image: url("../images/star.svg"), linear-gradient(to bottom, #05007A, #4D007D);
        height: 100%;
        margin: 0;
        background-attachment: fixed;
        overflow: hidden;
    }

    .mars {
        left: 0;
        right: 0;
        bottom: 0;
        position: absolute;
        height: 27vmin;
        background: url("../images/mars.svg") no-repeat bottom center;
        background-size: cover;
    }

    .logo-404 {
        position: absolute;
        margin-left: auto;
        margin-right: auto;
        left: 0;
        right: 0;
        top: 16vmin;
        width: 30vmin;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .logo-404 {
            top: 45vmin;
        }
    }

    .meteor {
        position: absolute;
        right: 2vmin;
        top: 16vmin;
    }

    .title {
        position: relative;
        z-index: 2;
        color: white;
        font-family: "Nunito", sans-serif;
        font-weight: 600;
        text-align: center;
        font-size: 5vmin;
        margin-top: 31vmin;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .title {
            margin-top: 65vmin;
        }
    }

    .subtitle {
        position: relative;
        z-index: 2;
        color: white;
        font-family: "Nunito", sans-serif;
        font-weight: 400;
        text-align: center;
        font-size: 3.5vmin;
        margin-top: -1vmin;
        margin-bottom: 9vmin;
    }

    .btn-back {
        position: relative;
        z-index: 2;
        border: 1px solid white;
        color: white;
        height: 5vmin;
        padding: 12px;
        font-family: "Nunito", sans-serif;
        text-decoration: none;
        border-radius: 5px;
    }

    .btn-back:hover {
        background: white;
        color: #4D007D;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .btn-back {
            font-size: 3.5vmin;
        }
    }

    .astronaut {
        position: absolute;
        z-index: 1;
        top: 18vmin;
        left: 10vmin;
        height: 30vmin;
        animation: floating 3s infinite ease-in-out;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .astronaut {
            top: 2vmin;
        }
    }

    .spaceship {
        position: absolute;
        z-index: 1;
        bottom: 15vmin;
        right: 24vmin;
    }

    @media (max-width: 480px) and (min-width: 320px) {
        .spaceship {
            width: 45vmin;
            bottom: 18vmin;
        }
    }
style>
html>

6.5 CSS和JS

css和Js文件，请前往8所载资源路径下载，下载后直接复制粘贴进前言所载的相应的目录文件即可

7 效果图

7.1 登录成功

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-097uLsPq-1663680000001)(https://gitee.com/you-tanzhi/pic/raw/master/%E6%88%90%E5%8A%9F%E8%AE%BF%E9%97%AE.gif)]

7.2 登录成功之后直接访问主页

在这里插入图片描述

7.3 用户名已存在