本系列的写作风格是第一人称,目的是为了让教程看起来更有意思一点,叶小凡是我某本JS书籍的主人公名字。以下经历纯属虚构,如有雷同,纯属巧合!

01 兔哥,收我为徒吧

我叫叶小凡,即将毕业,正愁找工作。之前在网上关注了一位博主,网名叫剽悍一小兔,感觉文章写的还可以,后来关注了他的公众号,学会了基本的环境配置。可是,也就仅此而已了,我只会HelloWorld。

这一天,我微信上问他,你为啥叫剽悍一小兔啊?

“没多想,我挺喜欢兔子的,应该很好吃,脑袋一热,就取了这个名字!”

“兔哥,我刚毕业,想学Java,能不能收我为徒啊?”

“是么,你可要想好,跟我修行可是很辛苦的!”

“我已经想好了,我虽然只会HelloWorld,但是我愿意学。”

“这样,你先用SpringBoot帮我做一个系统出来,我打算做一个教育网站,正好要用,你什么时候给我做出来,我就什么时候收你为徒!”

我一听就惊呆了,连忙说道:“可是我只会HelloWorld啊......”

“没事,我可以指导你怎么写,放心,只会HelloWorld也没有关系,你一定可以的!”

“我明白了,兔哥,你是打算把修行的内容平摊到每一天中,让我在做网站的时候,就学到了编程的技术,对吗?”

“不是,我只是单纯地不想自己写而已!”

“。。。。。。额,最后一个问题,为什么你每说完一句话,都要加个感叹号啊?”

“!”

02 先建表吧

根据兔哥的说法,他要做一个能发布教程的系统,教程,不就是文章嘛。emmm....
我先建一个文章表肯定没错的,SpringBoot啥的待会再说吧。

兔哥:“你先别着急建文章表,要不你先把我关于springboot的入门教程看了,其实你用spring data jpa的话,可以直接写JavaBean,顺便把表建了,很方便。”

路径:打开公众号

点击经典博客,在这里:

“我靠,你从哪冒出来的,吓死宝宝了!”我吃了一惊,然后就去看了一下教程,感觉其实也挺简单的嘛。

03 搭建SpringBoot项目

ok,说干就干,先把系统给建起来。兔哥的文章里面讲的是在线生成springboot项目,我偏不,我就自己建。

当然,我已经通过看这里的文章,把环境都搭建好了,maven也配置好了。

接下来就是撸起袖子加油干,打开eclipse,创建一个maven项目。

点击Finish完成。

现在,修改一下pom文件:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.tuzi</groupId>
  <artifactId>edu</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>兔子编程</name>
  <description>某个很水的在线教育平台</description>
  
   <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
    </parent>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>3.8.1</version>
              <scope>test</scope>
        </dependency>
        <!-- servlet依赖. -->
        <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>javax.servlet-api</artifactId>
               
        </dependency>
              <dependency>
                     <groupId>javax.servlet</groupId>
                     <artifactId>jstl</artifactId>
              </dependency>
        <!-- tomcat的支持.-->
        <dependency>
               <groupId>org.apache.tomcat.embed</groupId>
               <artifactId>tomcat-embed-jasper</artifactId>
                
        </dependency>  
        
        
        <dependency>
		    <groupId>org.springframework.boot</groupId>
		    <artifactId>spring-boot-devtools</artifactId>
		    <optional>true</optional> <!-- 这个需要为 true 热部署才有效 -->
		</dependency>
		
		<!-- ORM 框架采用JPA -->
		<dependency>
		    <groupId>org.springframework.boot</groupId>
		    <artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>


		<!-- mysql -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.21</version>
		</dependency>
		
		
		
		<!-- springboot test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        
        
        


    </dependencies>
 
    <properties>
        <java.version>1.8</java.version>
    </properties>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>1.4.2.RELEASE</version>
            </plugin>
        </plugins>
        
        <resources>
            <resource>
                <directory>${basedir}/src/main/webapp</directory>
                <targetPath>META-INF/resources</targetPath>
                <includes>
                    <include>**/**</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>false</filtering>
                <includes>
                    <include>**/**</include>
                </includes>
            </resource>
        </resources>
    </build>
  
  
</project>

基本的配置都有了,保存了以后maven会去自动下载对应的jar包的,不用我操心啦。

然后,这边建一个简单的目录结构:

配置文件就用yml吧,兔哥的教程里面也是yml的,然后这边我加了点mvc的配置,因为视图层我只会jsp:

server:
  port: 8080
  context-path: /edu

spring:

  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/edu?characterEncoding=UTF-8
    username: root
    password: 
    
  jpa:
    database: mysql
    hibernate:
      ddl-auto: update
      show-sql: true
    
  resources:
    static-locations: classpath:static/
  mvc:
    view:
      prefix: /WEB-INF/jsp/
      suffix: .jsp

先写一个User类:

package com.edu.entity;

import javax.persistence.*;

@Entity
public class User {
	
	@Id
	@Column(length = 20)
	private String userName;
	
	@Column(length = 20)
	private String password;
	
	@Column(length = 30)
	private String nickName;
	
	@Column(length = 80)
	private String headerPic;
	
	@Column(length = 1)
	private String isVip;
	
	@Column(length = 1)
	private String isLogined;
	
	@Column(length = 2)
	private String roleId;
	
	@Column(length = 1)
	private String isDelete;
	
	@Column(length = 8)
	private String createTime;
	
	@Column(length = 8)
	private String lastLoginTime;
	
	@Column(length = 64)
	private String ipAddr;

	//无参构造方法,这个必须要有,不然会报错
    public User() {
        
    }

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getNickName() {
		return nickName;
	}

	public void setNickName(String nickName) {
		this.nickName = nickName;
	}

	public String getHeaderPic() {
		return headerPic;
	}

	public void setHeaderPic(String headerPic) {
		this.headerPic = headerPic;
	}

	public String getIsVip() {
		return isVip;
	}

	public void setIsVip(String isVip) {
		this.isVip = isVip;
	}

	public String getRoleId() {
		return roleId;
	}

	public void setRoleId(String roleId) {
		this.roleId = roleId;
	}

	public String getIsDelete() {
		return isDelete;
	}

	public void setIsDelete(String isDelete) {
		this.isDelete = isDelete;
	}

	public String getCreateTime() {
		return createTime;
	}

	public void setCreateTime(String createTime) {
		this.createTime = createTime;
	}

	public String getIsLogined() {
		return isLogined;
	}

	public void setIsLogined(String isLogined) {
		this.isLogined = isLogined;
	}

	public String getLastLoginTime() {
		return lastLoginTime;
	}

	public void setLastLoginTime(String lastLoginTime) {
		this.lastLoginTime = lastLoginTime;
	}

	public String getIpAddr() {
		return ipAddr;
	}

	public void setIpAddr(String ipAddr) {
		this.ipAddr = ipAddr;
	}

}

这个User类主要是用来做用户的登录的,嗯,反正他自己一个人用,我就做登录功能,不注册了。

然后,用mysql-front工具去新建一个叫做edu的数据库。

这是启动类:

package com.edu;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

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

}

接下来就是见证奇迹的时刻,运行启动类:

没报错欸!看下数据库:

来了来了,真的来了,好高兴哦,又吃成长快乐了!

03 访问登录页面吧

既然是个系统,肯定得有一个登录页面撒,可是我html和css写的很一般,美工又不会做,就只能网上找一找现成的登录模板,才可以维持得了生活,这样子。

兔哥:“别去乱搜了,我们得加快进度啊,我已经给你找好了,直接用这一套吧!”

“我靠,你能不能别总是一下子就跑出来吓人好不啦!”我又吃了一惊。

于是,兔哥给我发了一个资料包,我根据他的要求把一系列文件放在了对应的地方。

这是公共的jsp和登录页面——login.jsp。

taglib.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%

//获取当前项目路径
String path = request.getContextPath();
int port = request.getServerPort();
String basePath = null; 
if(port==80){
	basePath = request.getScheme()+"://"+request.getServerName()+path;
}else{
	basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path;
}
pageContext.setAttribute("basePath", basePath);

%>

login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@include  file="common/taglib.jsp"%> 
<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>Document</title>
  <style>
	#canvas { 
		position: fixed;
		top: 0;
		z-index: -100;
		opacity:0.6;
	}

	.box{
	    display: flex;
	    justify-content: center;
		margin-top: 50px;
		perspective: 500px;
		transform-style: preserve-3d;
		animation: fadeInUp 0.5s;
	}

	.font {
	    float: left;
		width: 100px;
		height: 100px;
		background: #fff;
		color: #16142B;
		border: 1px solid #16142B;
		font-family: consolas;
		font-weight: bold;
		font-size: 50px;
		text-align: center;
		line-height: 100px;
		transition: 0.8s;
		box-shadow: 0 5px 10px black, inset 0 5px 2px #777, inset 0 -5px 2px #333, inset 5px 0px 2px #444, inset -5px 0px 2px #444;
		border-radius: 20px;
	}
	
	#mainContent {position:absolute;left:50%;margin-left:-220px;margin-top:20px;}
	.box2 {position:relative;top:24px;color:#222;}
	
	input {
        display: inline-block;
	    width: 100%;
	    height: 28px;
	    padding: 6px 12px;
	    font-size: 14px;
	    line-height: 1.42857143;
	    color: #555;
	    background-color: #fff;
	    background-image: none;
	    border: 1px solid #ccc;
	    border-radius: 4px;
    }
    
    #message {color:red;}
  
  </style>
 </head>
 <body>
	
	<div class="box">
		<div class="font" id="d">
			小
		</div>
		<div class="font" id="k">
			兔
		</div>
		<div class="font" id="p">
			教
		</div>
		<div class="font" id="l">
			育
		</div>
		
	</div>
	
	<div id="mainContent" style="text-align:center;">
		<div class="box2">
			<div style="height:24px;">   <span id="message"></span>   </div>
			<form action="user/login" method="post">
				<input type="text" class="inputs" id="account" name="account" autofocus="autofocus" placeholder="请输入账号" maxLength="20">&nbsp;&nbsp;&nbsp;&nbsp;
				<input type="password" class="inputs" id="password" name="password" placeholder="请输入密码" maxLength="20">
				<p class="btn"><input type="button" style="height:38px;width:106%;" id="loginbtn" hidden='true' onclick="tm_login(this)" class="submit" value="登陆"><p>
			</form>
		</div>
	</div>
	
	<canvas id="canvas" width="686" height="300"></canvas>
	
	<script type="text/javascript" src="${basePath}/js/jquery-1.11.1.min.js"></script>
	<script type="text/javascript" src="${basePath}/js/util.js"></script>
	
	
	<script>

		/**
		 * 获取canvas对象,设置宽度高度自适应
		 * @type {[type]}
		 */
		var canvas = document.querySelector("#canvas");
		canvas.width = window.innerWidth;
		canvas.height = window.innerHeight;
		canvas.globalAlpha = .1;
		canvas.fillStyle = 'rgba(255, 255, 255, 0)';
		
		var ctx = canvas.getContext("2d");
		/**
		 * 屏幕鼠标坐标
		 * @type {Object}
		 */
		var mouse = {
		    x: undefined,
		    y: undefined
		}
		/**
		 * @param  {鼠标移动事件,回调函数,赋值给鼠标坐标}
		 * @return {[type]}
		 */
		window.addEventListener("mousemove",function (event) {
		    mouse.x = event.x;
		    mouse.y = event.y;
		    // console.log(mouse);
		});
		/**
		 * @param  {重新设置窗口大小,使canvas宽高自适应屏幕}
		 * @return {[type]}
		 */
		window.addEventListener("resize",function () {
		    canvas.width = window.innerWidth;
		    canvas.height = window.innerHeight;
		    //初始化canvas
		    init();
		})
		//绘制圆的最大半径
		var maxRadius = 10;
		// var minRadius = 2;
		
		//圆的颜色数组
		var colorArray = [
		    '#58D68D',
		    '#E67F22',
		    '#3598DB',
		    '#E84C3D',
		    '#9A59B5',
		    '#27AE61',
		    '#D25400',
		    '#BEC3C7',
		    '#297FB8'
		]
		/**
		 * @param {x圆中心的x坐标}
		 * @param {y圆中心的y坐标}
		 * @param {dx圆运动的x偏移量}
		 * @param {dy圆运动的y偏移量}
		 * @param {radius圆的半径}
		 * minRadius圆的最小半径
		 * bg圆的背景颜色
		 * draw绘制函数
		 * update圆运动偏移
		 */
		function Circle(x, y, dx, dy, radius) {
		    this.x = x;
		    this.y = y;
		    this.dx = dx;
		    this.dy = dy;
		    this.radius = radius;
		    this.minRadius = radius;
		    this.bg = colorArray[Math.floor(Math.random()*colorArray.length)];
		
		    this.draw = function() {
		        ctx.beginPath();
		        ctx.strokeStyle = "#777";
		        ctx.fillStyle = this.bg;
		        ctx.arc(this.x,this.y,this.radius,Math.PI/180*0,Math.PI/180*360,false);
		        // ctx.stroke();
		        ctx.fill();
		    }
		    this.update = function() {
		        //圆触碰边界时反弹,偏移值为负
		        if (this.x + this.radius > innerWidth || this.x - this.radius < 0 ) {
		            this.dx = -this.dx;
		        }
		        if (this.y + this.radius > innerHeight || this.y - this.radius < 0 ) {
		            this.dy = -this.dy;
		        }
		        //刷新绘制时圆的偏移运动
		        this.x += this.dx;
		        this.y += this.dy;
		        //鼠标半径50像素范围内的圆,它们的半径逐步增加到最大值
		        if (mouse.x - this.x < 50 && mouse.x - this.x >-50 && mouse.y - this.y < 50 && mouse.y - this.y >-50) {
		            if (this.radius < maxRadius) {
		                this.radius += 1;
		            }
		        //其他的所有圆半径减小到最小值
		        }else if (this.radius > this.minRadius) {
		            this.radius -= 1;
		        }
		        //根据更新的值进行绘制
		        this.draw();
		
		    }
		}
		//圆的对象数组
		var circleArray = [];
		/**
		 * 初始化函数,制造800个随机坐标、偏移速度和半径的圆,加入到对象数组
		 * @return {[type]}
		 */
		function init() {
		    circleArray = []
		    for (var i = 0; i < 800; i++) {
		        var x = Math.random()*window.innerWidth;
		        var y = Math.random()*window.innerHeight;
		        var dx = (Math.random()-0.5)*2;
		        var dy = (Math.random()-0.5)*2;
		        var radius = Math.random()*3 +1;
		        circleArray.push(new Circle(x, y, dx, dy, radius));
		    }
		}
		init();
		/**
		 * 动画函数
		 * @return {[type]}
		 */
		function animate() {
		    //更新前清楚画布
		    ctx.clearRect(0,0,window.innerWidth,window.innerHeight);
		    requestAnimationFrame(animate);
		    //每个圆都调用update()方法
		    for (var i = 0; i < circleArray.length; i++) {
		        circleArray[i].update();
		    }
		
		}
		animate();
		
		
		$(function(){
			//敲入键盘的enter建进行提交登陆
			$(document).keydown(function(e){
				if(e.keyCode == 13){
					//触发登陆按钮的事件
					$("#loginbtn").trigger("click");
				}
			});
			
		});
		
		
		//已定义减少和服务器端的交互---静态化
		function tm_login(obj){
			var account = $("#account").val();
			var password = $("#password").val();
			if(isEmpty(account)){
				$("#account").focus();
				tm_showmessage("请输入账号");
				return;
			}
			
			if(isEmpty(password)){
				$("#password").focus();
				tm_showmessage("请输入密码");
				return;
			}
			
			//$(obj).parent().css("paddingLeft",387);
			$(obj).attr("value","登陆中...").removeAttr("onclick");
			
			$.ajax({
				type:"post",
				url:"User/login.do",
				error:function(){$(obj).attr("value","登陆").attr("onclick","tm_login(this)");},
				data:{"account":account,"password":password},
				success:function(data){
					data = eval("("+data+")");
					
					if(data.code == 0){
						window.location.href = "view.do?path=index";
					}else{
						$("#account").select();
						$("#password").val("");
						$(obj).attr("value","登陆").attr("onclick","tm_login(this)");
						tm_showmessage(data.msg);
					}
				}
			});
			
		}
		
		//显示错误信息
		function tm_showmessage(message){
			$("#message").show().html(message).stop(true,true).fadeOut(3000);
		}
		
		
		
		
		//找到文本框,并注册得到焦点事件
       /*  $("input").focus(function(){
            //让当前得到焦点的文本框改变其背景色
            $(this).css("background","skyblue").css("color","#fff");
        });
        //找到文本框,并注册失去焦点事件
        $("input").blur(function(){
            //让当前失去焦点的文本框背景色变为白色
            $(this).css("background","white").css("color","#000");
        }); */
		
	</script>
 </body>
</html>

兔哥说是网上随便找的,看起来挺牛掰的,咱也不敢问,等以后学到前端知识的时候再说吧。

然后是static这里放静态资源:

因为在application.yml里面已经配置静态资源了,所以这样就能直接访问static文件夹里面的东西了。

  resources:
    static-locations: classpath:static/

接下来是java的部分

ViewController就是视图访问控制器,看下代码:

package com.edu.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class ViewController {

	@RequestMapping("/view/{page}")
	public String view(@PathVariable(name = "page") String page) {
		return page;
	}
	
}

意思就是页面访问这个映射地址,直接返回 WEB-INF/jsp里面对应的文件。

启动项目,然后我们访问
http://localhost:8080/edu/view/login

看到了登录页面:

本章源码已经上传群文件,有需要的小伙伴直接去下载哦。

posted on 2020-12-30 22:24  剽悍一小兔  阅读(684)  评论(0编辑  收藏  举报