阿华代码,不是逆风,就是我疯
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目录
[(1) 账号密码校验接⼝](#(1) 账号密码校验接⼝)
[3: 创建模拟(dao)包](#3: 创建模拟(dao)包)
一:项目实现准备
1:需求
(1)登录
⽤⼾输⼊账号,密码完成登录功能(2) 列表展⽰
展⽰图书
2:准备工作
放入前端代码,注:代码顺序如下,js,css,picture自行准备
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>添加图书</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="css/add.css">
</head>
<body>
<div class="container">
<div class="form-inline">
<h2 style="text-align: left; margin-left: 10px;"><svg xmlns="http://www.w3.org/2000/svg" width="40"
fill="#17a2b8" class="bi bi-book-half" viewBox="0 0 16 16">
<path
d="M8.5 2.687c.654-.689 1.782-.886 3.112-.752 1.234.124 2.503.523 3.388.893v9.923c-.918-.35-2.107-.692-3.287-.81-1.094-.111-2.278-.039-3.213.492V2.687zM8 1.783C7.015.936 5.587.81 4.287.94c-1.514.153-3.042.672-3.994 1.105A.5.5 0 0 0 0 2.5v11a.5.5 0 0 0 .707.455c.882-.4 2.303-.881 3.68-1.02 1.409-.142 2.59.087 3.223.877a.5.5 0 0 0 .78 0c.633-.79 1.814-1.019 3.222-.877 1.378.139 2.8.62 3.681 1.02A.5.5 0 0 0 16 13.5v-11a.5.5 0 0 0-.293-.455c-.952-.433-2.48-.952-3.994-1.105C10.413.809 8.985.936 8 1.783z" />
</svg>
<span>添加图书</span>
</h2>
</div>
<form id="addBook">
<div class="form-group">
<label for="bookName">图书名称:</label>
<input type="text" class="form-control" placeholder="请输入图书名称" id="bookName" name="bookName">
</div>
<div class="form-group">
<label for="bookAuthor">图书作者</label>
<input type="text" class="form-control" placeholder="请输入图书作者" id="bookAuthor" name="author" />
</div>
<div class="form-group">
<label for="bookStock">图书库存</label>
<input type="text" class="form-control" placeholder="请输入图书库存" id="bookStock" name="count"/>
</div>
<div class="form-group">
<label for="bookPrice">图书定价:</label>
<input type="number" class="form-control" placeholder="请输入价格" id="bookPrice" name="price">
</div>
<div class="form-group">
<label for="bookPublisher">出版社</label>
<input type="text" id="bookPublisher" class="form-control" placeholder="请输入图书出版社" name="publish" />
</div>
<div class="form-group">
<label for="bookStatus">图书状态</label>
<select class="custom-select" id="bookStatus" name="status">
<option value="1" selected>可借阅</option>
<option value="2">不可借阅</option>
</select>
</div>
<div class="form-group" style="text-align: right">
<button type="button" class="btn btn-info btn-lg" onclick="add()">确定</button>
<button type="button" class="btn btn-secondary btn-lg" onclick="javascript:history.back()">返回</button>
</div>
</form>
</div>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script>
function add() {
alert("添加成功");
location.href = "book_list.html";
}
</script>
</body>
</html>
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>图书列表展示</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="css/list.css">
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/bootstrap.min.js"></script>
<script src="js/jq-paginator.js"></script>
</head>
<body>
<div class="bookContainer">
<h2>图书列表展示</h2>
<div class="navbar-justify-between">
<div>
<button class="btn btn-outline-info" type="button" onclick="location.href='book_add.html'">添加图书</button>
<button class="btn btn-outline-info" type="button" onclick="batchDelete()">批量删除</button>
</div>
</div>
<table>
<thead>
<tr>
<td>选择</td>
<td class="width100">图书ID</td>
<td>书名</td>
<td>作者</td>
<td>数量</td>
<td>定价</td>
<td>出版社</td>
<td>状态</td>
<td class="width200">操作</td>
</tr>
</thead>
<tbody>
<tr>
<td><input type="checkbox" name="selectBook" value="1" id="selectBook" class="book-select"></td>
<td>1</td>
<td>大秦帝国第一册</td>
<td>我是作者</td>
<td>23</td>
<td>33.00</td>
<td>北京出版社</td>
<td>可借阅</td>
<td>
<div class="op">
<a href="book_update.html?bookId=1">修改</a>
<a href="javascript:void(0)" onclick="deleteBook(1)">删除</a>
</div>
</td>
</tr>
<tr>
<td><input type="checkbox" name="selectBook" value="1" id="selectBook" class="book-select"></td>
<td>2</td>
<td>大秦帝国第二册</td>
<td>我是作者</td>
<td>23</td>
<td>33.00</td>
<td>北京出版社</td>
<td>可借阅</td>
<td>
<div class="op">
<a href="book_update.html?bookId=2">修改</a>
<a href="javascript:void(0)" onclick="deleteBook(2)">删除</a>
</div>
</td>
</tr>
<tr>
<td><input type="checkbox" name="selectBook" value="1" id="selectBook" class="book-select"></td>
<td>3</td>
<td>大秦帝国第三册</td>
<td>我是作者</td>
<td>23</td>
<td>33.00</td>
<td>北京出版社</td>
<td>可借阅</td>
<td>
<div class="op">
<a href="book_update.html?bookId=3">修改</a>
<a href="javascript:void(0)" onclick="deleteBook(3)">删除</a>
</div>
</td>
</tr>
<tr>
<td><input type="checkbox" name="selectBook" value="1" id="selectBook" class="book-select"></td>
<td>4</td>
<td>大秦帝国第四册</td>
<td>我是作者</td>
<td>23</td>
<td>33.00</td>
<td>北京出版社</td>
<td>可借阅</td>
<td>
<div class="op">
<a href="book_update.html?bookId=4">修改</a>
<a href="javascript:void(0)" onclick="deleteBook(4)">删除</a>
</div>
</td>
</tr>
</tbody>
</table>
<div class="demo">
<ul id="pageContainer" class="pagination justify-content-center"></ul>
</div>
<script>
getBookList();
function getBookList() {
}
//翻页信息
$("#pageContainer").jqPaginator({
totalCounts: 100, //总记录数
pageSize: 10, //每页的个数
visiblePages: 5, //可视页数
currentPage: 1, //当前页码
first: '<li class="page-item"><a class="page-link">首页</a></li>',
prev: '<li class="page-item"><a class="page-link" href="javascript:void(0);">上一页<\/a><\/li>',
next: '<li class="page-item"><a class="page-link" href="javascript:void(0);">下一页<\/a><\/li>',
last: '<li class="page-item"><a class="page-link" href="javascript:void(0);">最后一页<\/a><\/li>',
page: '<li class="page-item"><a class="page-link" href="javascript:void(0);">{{page}}<\/a><\/li>',
//页面初始化和页码点击时都会执行
onPageChange: function (page, type) {
console.log("第"+page+"页, 类型:"+type);
}
});
function deleteBook(id) {
var isDelete = confirm("确认删除?");
if (isDelete) {
//删除图书
alert("删除成功");
}
}
function batchDelete() {
var isDelete = confirm("确认批量删除?");
if (isDelete) {
//获取复选框的id
var ids = [];
$("input:checkbox[name='selectBook']:checked").each(function () {
ids.push($(this).val());
});
console.log(ids);
alert("批量删除成功");
}
}
</script>
</div>
</body>
</html>
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>修改图书</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="css/add.css">
</head>
<body>
<div class="container">
<div class="form-inline">
<h2 style="text-align: left; margin-left: 10px;"><svg xmlns="http://www.w3.org/2000/svg" width="40"
fill="#17a2b8" class="bi bi-book-half" viewBox="0 0 16 16">
<path
d="M8.5 2.687c.654-.689 1.782-.886 3.112-.752 1.234.124 2.503.523 3.388.893v9.923c-.918-.35-2.107-.692-3.287-.81-1.094-.111-2.278-.039-3.213.492V2.687zM8 1.783C7.015.936 5.587.81 4.287.94c-1.514.153-3.042.672-3.994 1.105A.5.5 0 0 0 0 2.5v11a.5.5 0 0 0 .707.455c.882-.4 2.303-.881 3.68-1.02 1.409-.142 2.59.087 3.223.877a.5.5 0 0 0 .78 0c.633-.79 1.814-1.019 3.222-.877 1.378.139 2.8.62 3.681 1.02A.5.5 0 0 0 16 13.5v-11a.5.5 0 0 0-.293-.455c-.952-.433-2.48-.952-3.994-1.105C10.413.809 8.985.936 8 1.783z" />
</svg>
<span>修改图书</span>
</h2>
</div>
<form id="updateBook">
<input type="hidden" class="form-control" id="bookId" name="id">
<div class="form-group">
<label for="bookName">图书名称:</label>
<input type="text" class="form-control" id="bookName" name="bookName">
</div>
<div class="form-group">
<label for="bookAuthor">图书作者</label>
<input type="text" class="form-control" id="bookAuthor" name="author"/>
</div>
<div class="form-group">
<label for="bookStock">图书库存</label>
<input type="text" class="form-control" id="bookStock" name="count"/>
</div>
<div class="form-group">
<label for="bookPrice">图书定价:</label>
<input type="number" class="form-control" id="bookPrice" name="price">
</div>
<div class="form-group">
<label for="bookPublisher">出版社</label>
<input type="text" id="bookPublisher" class="form-control" name="publish"/>
</div>
<div class="form-group">
<label for="bookStatus">图书状态</label>
<select class="custom-select" id="bookStatus" name="status">
<option value="1" selected>可借阅</option>
<option value="2">不可借阅</option>
</select>
</div>
<div class="form-group" style="text-align: right">
<button type="button" class="btn btn-info btn-lg" onclick="update()">确定</button>
<button type="button" class="btn btn-secondary btn-lg" onclick="javascript:history.back()">返回</button>
</div>
</form>
</div>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script>
function update() {
alert("更新成功");
location.href = "book_list.html"
}
</script>
</body>
</html>
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="css/login.css">
<script type="text/javascript" src="js/jquery.min.js"></script>
</head>
<body>
<div class="container-login">
<div class="container-pic">
<img src="pic/computer.png" width="350px">
</div>
<div class="login-dialog">
<h3>登陆</h3>
<div class="row">
<span>用户名</span>
<input type="text" name="userName" id="userName" class="form-control">
</div>
<div class="row">
<span>密码</span>
<input type="password" name="password" id="password" class="form-control">
</div>
<div class="row">
<button type="button" class="btn btn-info btn-lg" onclick="login()">登录</button>
</div>
</div>
</div>
<script src="js/jquery.min.js"></script>
<script>
function login() {
location.href = "book_list.html";
}
</script>
</body>
</html>
二:约定前后端交互接口
1:需求分析
后端需要提供两个接⼝
(1) 账号密码校验接⼝
根据输⼊⽤⼾名和密码校验登录是否通过
(2)图书列表
提供图书列表信息
2:接口定义
(1)登录接⼝
[URL]
POST /user/login
[请求参数]
name=admin&password=admin
[响应]
true //账号密码验证成功
false//账号密码验证失败
(2)图书列表
[URL]
POST /book/getList
[请求参数]
⽆
[响应]------JSON的形式返回
返回图书列表
[
{
"id": 1,
"bookName": "活着",
"author": "余华",
"count": 270,
"price": 20,
"publish": "北京⽂艺出版社",
"status": 1,
"statusCN": "可借阅"
},
...
]
3:字段说明
三:服务器代码实现
1:创建图书类BookInfo
java
@Data
public class BookInfo {
private Integer ID;
private String bookName;
private String author;
private Integer num;
private BigDecimal price;
private String publishName;
private Integer status;
private String statusCN;
}
2:创建UserController
实现登录验证接⼝
java
@RequestMapping("/user")
@RestController
public class UserController {
@RequestMapping("/login")
public String login(String userName , String password , HttpSession session){
//1:校验参数
if(!StringUtils.hasLength(userName)
|| !StringUtils.hasLength(password)){
return "用户名或者密码为空";
}
//2:验证账户和密码
if(!"admin".equals(userName) || !"admin".equals(password)){
return "账户名错误或密码错误";
}
//3:返回响应结果
return "登录成功";
}
创建BookController,获取图书列表
java
@RequestMapping("/book")
@RestController
public class BookController {
@Autowired
private BookService bookService;//注入依赖
@RequestMapping("/getBookList")
//mock数据模拟造假数据
public List<BookInfo> getBookList(){
//BookService bookService = new BookService();
List<BookInfo> bookInfos =bookService.getBookList();
return bookInfos;
}
}
3: 创建模拟(dao)包
注:数据采⽤mock的⽅式,实际数据应该从数据库中获取
此处创建⼀个虚拟的对象或者数据样本,⽤来辅助开发或者测试⼯作
在dao包下创建BookDao类
java
@Configuration
public class BookDao {
//数据层,理论上应该从数据库中获取,当前采用mock的方式进行获取
public List<BookInfo> mockData(){
List<BookInfo> bookInfos = new ArrayList<>();
for(int i = 0; i < 15; i++) {
BookInfo bookInfo = new BookInfo();
bookInfo.setID(i);
bookInfo.setBookName("图书"+i);
bookInfo.setAuthor("作者"+i);
bookInfo.setNum(i*2+1);
bookInfo.setPrice(new BigDecimal(i*3));
bookInfo.setPublishName("出版社"+i);
if (i%5==0){
bookInfo.setStatus(2);
//bookInfo.setStatusCN("不可借阅");状态信息是业务逻辑放到service中进行处理
}else{
bookInfo.setStatus(1);
//bookInfo.setStatusCN("可借阅");
}
bookInfos.add(bookInfo);
}
return bookInfos;
}
}
四:完善前端代码
1:添加登录处理逻辑
html
<script>
function login() {
//发起ajax请求
$.ajax({
url: "user/login",
type: "post",
data: {
userName: $("#userName").val(),
password: $("#password").val(),
},
success: function(result){
//三种返回的http响应都是成功的
if(result === "登录成功"){
location.href = "book_list.html";
}else{
alert(result);
}
}
});
}
</script>
2:删除代码
删除前端伪造的代码,从后端获取数据并渲染到⻚⾯上
html
<table>
<thead>
<tr>
<td>选择</td>
<td class="width100">图书ID</td>
<td>书名</td>
<td>作者</td>
<td>数量</td>
<td>定价</td>
<td>出版社</td>
<td>状态</td>
<td class="width200">操作</td>
</tr>
</thead>
<tbody>
</tbody>
</table>
3:完善获取图书方法
html
function getBookList() {
$.ajax({
url:"/book/getBookList",
type: "get",
success:function(books){
var finnalHtml = "";
for(var book of books){
//用单引号拼接避免转义
finnalHtml += '<tr>';
finnalHtml += '<td><input type="checkbox" name="selectBook" value="'+book.id+'" id=" selectBook" class="book-select"></td>';
finnalHtml += '<td>'+book.id+'</td>';
finnalHtml += '<td>'+book.bookName+'</td>';
finnalHtml += '<td>'+book.author+'</td>';
finnalHtml += '<td>'+book.num+'</td>';
finnalHtml += '<td>'+book.price+'</td>';
finnalHtml += '<td>'+book.publishName+'</td>';
finnalHtml += '<td>'+book.statusCN+'</td>';
finnalHtml += '<td>';
finnalHtml += '<div class="op">';
finnalHtml += '<a href="book_update.html?bookId='+book.id+'">修改</a>';
finnalHtml += '<a href="javascript:void(0)" onclick="deleteBook(4)">删除</a>';
finnalHtml += '</div>';
finnalHtml += '</td>';
finnalHtml += '</tr>';
}
$("tbody").html(finnalHtml);
}
});
}
五:测试
访问:http://127.0.0.1:8080/login.html,输⼊账号密码:admin,admin,登录成功,跳转到图书列表⻚
界⾯展⽰