Nodejs加Vue.js的简单增删改查
用的node做的后台,数据库为mysql,数据交互和页面渲染用的vue,项目目录图:话不多说,首先来看node项目的配置文件app.js,注释我会写在代码里//引用模块var express = require('express');var path = require('path');var favicon = require('serve-favicon');var lo...
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用的node做的后台,数据库为mysql,数据交互和页面渲染用的vue,项目目录图:
话不多说,首先来看node项目的配置文件app.js,注释我会写在代码里
//引用模块
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var index = require('./routes/index');
var persons = require('./routes/person');
var app = express();
// view engine setup
// app.set('views', path.join(__dirname, 'views'));
// app.set('view engine', 'ejs');
//修改后的
app.set('views', path.join(__dirname, './views'));
app.engine('.html', require('ejs').__express);
app.set('view engine', 'html');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({extended: false}));
app.use(cookieParser());
//全局访问
app.all('*', function (req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Headers', 'Content-Type,Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild');
res.header('Access-Control-Allow-Methods', 'PUT, POST, GET, DELETE,OPTIONS');
if (req.method == 'OPTIONS') {
res.send(200);
}
else {
next();
}
});
//引入public文件夹,让页面能获取到public文件夹内的文件
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', index);
app.use('/persons', persons);
app.use(express.static(__dirname));
// app.use(express.static(__dirname + '../public'));
// catch 404 and forward to error handler
app.use(function (req, res, next) {
next(createError(404));
});
// error handler
app.use(function (err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
然后是连接数据库的js和路由配置
//db.js
// 连接MySQL
var mysql = require('mysql');
var pool = mysql.createPool({
host: 'localhost',//本机
user: 'root',//数据库帐号
password: 'root',//密码
database: 'test'//数据库
});
function query(sql, callback) {//执行sql
pool.getConnection(function (err, connection) {//err为错误信息 connection为连接数据库
// Use the connection
connection.query(sql, function (err, rows) {//rows为执行完sql的返回的信息
callback(err, rows);//回调
connection.release();//释放链接
});
});
}
exports.query = query;路由,可部分可以理解为页面访问的链接配置,全程用的ajax访问数据
var express = require('express');
var router = express.Router();
//引入数据库包
var db = require("./db.js");
/* GET listing. */
// router.get('/', function(req, res, next) {
// res.send('respond with a resource');
// });
/**
* 查询列表页,直接访问
*/
router.get('/', function (req, res, next) {
res.render('persons', {title: '人员管理', datas: 123});
});
/**
* 新增页面跳转
*/
router.get('/add', function (req, res) {
res.render('add');
});
router.post('/add', function (req, res) {
var name = req.body.name;
var age = req.body.age;
var professional = req.body.professional;
db.query("insert into person(name,age,professional) values('" + name + "'," + age + ",'" + professional + "')", function (err, rows) {
if (err) {
res.end('新增失败：' + err);
} else {
res.json(rows);//返回数据,为json格式
}
})
});
/**
* 删
*/
router.post('/del', function (req, res) {
var id = req.body.id;
db.query("delete from person where id=" + id, function (err, rows) {
// console.log(rows);
if (err) {
res.end('删除失败：' + err)
} else {
res.json(rows);
}
});
});
/**
* 修改
*/
router.post('/update', function (req, res) {
var id = req.body.id;
var name = req.body.name;
var age = req.body.age;
var professional = req.body.professional;
db.query("update person set name='" + name + "',age='" + age + "',professional= '" + professional + "' where id=" + id, function (err, rows) {
if (err) {
res.end('修改失败：' + err);
} else {
res.json(rows);
console.log(rows);
}
});
});
/**
* 查询
*/
router.post('/search', function (req, res) {
var name = req.body.s_name;
var age = req.body.s_age;
var professional = req.body.s_professional;
// console.log(req.body);
var sql = "select * from person where true ";
if (name) {
sql += " and name like '%" + name + "%' ";
}
if (age) {
sql += " and age=" + age + " ";
}
if (professional) {
sql += " and name like '%" + professional + "%' ";
}
// sql = sql.replace("and","where");
db.query(sql, function (err, rows) {
if (err) {
res.end("查询失败：", err)
} else {
res.json(rows);
}
});
});
module.exports = router;前台展示页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title><%= title %></title>
<link rel="shortcut icon" href="#"/>
<style>
div {
width: 800px;
margin: 0 auto;
}
table {
border-collapse: collapse;
border-spacing: 0;
width: 800px;
}
table tr td, table tr th {
border-top: solid 1px #ccc;
border-left: solid 1px #ccc;
line-height: 40px;
text-align: center;
}
table tr td:last-child, table tr th:last-child {
border-right: solid 1px #ccc;
}
table tr:last-child td {
border-bottom: solid 1px #ccc;
}
a {
text-decoration: none;
font-size: 14px;
}
.text {
width: 150px;
}
</style>
<!--../public/javascripts-->
<script src="javascripts/jquery-3.3.1.js"></script>
</head>
<body>
<div id="app">
<span id="finds">
<div style="">
<div style="float: left;width:10%;">
<a href="#" @click="edit()">新增</a>
</div>
<div style="float: right;width:90%;">
<form action="/persons/search" method="post" onsubmit="return false" id="forms">
姓名：<input type="text" name="s_name" id="s_name" class="text">
年龄：<input type="number" name="s_age" id="s_age" class="text">
职业：<input type="text" name="s_professional" id="s_professional" class="text">
<input type="submit" value="查询" @click="find()">
</form>
</div>
</div>
<table style="">
<tr>
<th width="10%">编号</th>
<th width="15%">操作</th>
<th width="15%">姓名</th>
<th width="10%">年龄</th>
<th width="50%">职业</th>
</tr>
<tr v-for="item in list">
<td>{{item.id}}</td>
<td>
<a href="#" @click="remove(item.id)">删除</a>
<a href="#" @click="edit(item)">修改</a>
</td>
<td>{{item.name}}</td>
<td>{{item.age}}</td>
<td>{{item.professional}}</td>
</tr>
</table>
</span>
<div style="width: 800px;margin: auto; display: none" id="edit">
<form action="/persons/add" method="post" onsubmit="return false">
<input type="hidden" id="id" name="id">
姓名：<input type="text" name="name" id="name">
年龄：<input type="number" name="age" id="age">
职业：<input type="text" name="professional" id="professional">
<input type="button" value="提交" @click="edits()">
<input type="button" value="返回" @click="backtrack()">
</form>
</div>
</div>
<script src="javascripts/vue.js"></script>
<script>
var vue = new Vue({
el: '#app',
data: {
list: find(),
},
methods: {
find: function () {//查询
this.list = find();
}, edit: function (item) {//点击编辑
$('#finds').hide();
$('#edit').show();
$('#id').val(item.id);
$('#name').val(item.name);
$('#age').val(item.age);
$('#professional').val(item.professional);
}, edits: function () {//修改和添加
if ($('#id').val() == "" || $('#id').val() == null) {
add();
} else {
edit();
}
this.list = find();
}, remove: function (id) {//删除
if (confirm("确定要删除这条数据吗?")) {
$.ajax({
type: "post",
url: "/persons/del",
dataType: "json",
data: {//传给servlet的数据,
id: id,
},
async: false,//加上这个ajax先执行
success: function (data) {
if (data.affectedRows>0) {
alert('删除成功');
}else{
alert('删除失败');
}
}
});
}
this.list = find();
},backtrack:function () {//返回
$('#finds').show();
$('#edit').hide();
}
}
})
//查询
function find() {
var data2;
$.ajax({
type: "post",
url: "/persons/search",
dataType: "json",
data: {//传给servlet的数据,
s_professional: $('#s_professional').val(),
s_name: $('#s_name').val(),
s_age: $('#s_age').val()
},
async: false,//加上这个ajax先执行
success: function (data) {
// console.log(data);
//返回处理的方法
data2 = data;
}
});
return data2;
}
//修改
function edit() {
$.ajax({
type: "post",
url: "/persons/update",
dataType: "json",
data: {//传给servlet的数据,
professional: $('#professional').val(),
name: $('#name').val(),
age: $('#age').val(),
id: $('#id').val(),
},
async: false,//加上这个ajax先执行
success: function (data) {
//返回处理的方法
console.log(data);
if (data.affectedRows > 0) {
alert('修改成功');
$('#finds').show();
$('#edit').hide();
$('#id').val("");
$('#name').val("");
$('#age').val("");
$('#professional').val("");
} else {
alert('修改失败');
}
}
});
}
//添加
function add() {
$.ajax({
type: "post",
url: "/persons/add",
dataType: "json",
data: {//传给servlet的数据,
professional: $('#professional').val(),
name: $('#name').val(),
age: $('#age').val(),
id: $('#id').val(),
},
async: false,//加上这个ajax先执行
success: function (data) {
//返回处理的方法
if (data.affectedRows > 0) {
alert('添加成功');
$('#finds').show();
$('#edit').hide();
$('#id').val("");
$('#name').val("");
$('#age').val("");
$('#professional').val("");
} else {
alert('添加失败');
}
}
});
}
</script>
</body>
</html>
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