Hi，大家好，我是编程小6，很荣幸遇见你，我把这些年在开发过程中遇到的问题或想法写出来，今天说一说js上传图片和展示图片[亲测有效],希望能够帮助你!!!。

今天，是JavaScript回炉的第六十六天

上传图片和点击图片并在网页上展示

//提交图片使用的是jquery的ajax传递图片，后端进行图片储存

function picture(){

let number = arguments[0].length;

let data = new FormData();

data.append('number',number)

for(let i=0;i<number;i++){

data.append("file"+i, arguments[0][i]);

}

$.ajax({

type:'POST',

url:'http://127.0.0.1:8000/index_fontsize_addimg',

dataType: "json",

data: data,

processData: false,

contentType: false,

success: function () {

alert('提交成功')

}

})

}

//点击图标展示输入框

document.getElementById('input02').onclick = function(){

let arr = new Array();

document.getElementById('div01').style.display = 'block';

let text = document.querySelector("#textarea1");

let content;

let count = 0;

let fileData;

text.addEventListener("keyup", function(e) {

content = text.value;

})

document.getElementById('input01').onchange = function() {

count+=1;

fileData = this.files[0];

arr.push(fileData)

let photo = fileData.name;

if(content == undefined){

document.getElementById('textarea1').value ='['+count+'*'+photo+']';

}else{

document.getElementById('textarea1').value = content+'['+count+'*'+photo+']';

}

}

//点击确定写入数据库

document.getElementById('input03').onclick = function(){

let name = document.getElementById('input04').value;

let photo1 = document.getElementById('textarea1').value;

//图片传递给函数 picture()

picture(arr)

let url = 'http://127.0.0.1:8000/index_fontsize_add';

data={

name:name,

content:photo1

}

//ajax的函数写入功能

writeMysql(data,url);

}

}

//ajax的函数写入功能

function writeMysql(Data,Url){

let url = Url;

let data = Data;

let ajx = new XMLHttpRequest();

ajx.open('POST',url,true);

ajx.onreadystatechange = function(){

if(ajx.readyState == 4){

if(ajx.status == 200){

let content = JSON.parse(ajx.responseText)['data'][0];

//获取值传递给mysqlExhibition()函数

mysqlExhibition(content)

}

}

}

ajx.send(JSON.stringify(data));

}

//该函数主要是对数据库的内容进行提炼

function mysqlExhibition(exhibition){

let str = exhibition.content

let str01 = exhibition

let str1 = str.replace(/\[(.+?)\]/g,'')

let str03 = (str.match(/\*/g).length);

//把值传递给pic()函数

pic(str01,str1,str03)

}

//页面展示函数，主要是创建图片，这里我觉得一张博客写入5张图片应该可以了

function pic(exhibition,str1,str03){

let Url = 'http://127.0.0.1:8000/media/'

let div = document.getElementById('div03');

let p = document.createElement('p');

div.appendChild(p);

p.innerText = str1;

console.log(str03)

console.log(exhibition)

let arr = [exhibition.img0,exhibition.img1,exhibition.img2,exhibition.img3,exhibition.img4,exhibition.img5,exhibition.img6,exhibition.img7,exhibition.img8,exhibition.img9]

for(let i=0;i<str03;i++){

console.log(arr[i])

let img = document.createElement('img');

div.appendChild(img);

img.src = Url+arr[i];

img.id = 'img01';

}

}

//展示表格，博客的内容

function selectMysql(){

let AJX = new XMLHttpRequest();

let url = 'http://127.0.0.1:8000/index_fontsize';

AJX.open('GET',url,true);

AJX.onreadystatechange = function(){

if(AJX.readyState == 4){

if(AJX.status == 200){

let number = JSON.parse(AJX.responseText)['data'].length;

let content = JSON.parse(AJX.responseText)['data']

let table = document.getElementById('table01');

for(let i=0;i<number;i++){

let tr = document.createElement('tr');

let td = document.createElement('td');

let td1 = document.createElement('td');

let td2 = document.createElement('td');

table.appendChild(tr);

tr.appendChild(td);

tr.appendChild(td1);

tr.appendChild(td2);

td.innerText = content[i].name;

td2.innerText = '查询';

td2.style.background='blue';

}

}

}

}

AJX.send();

}

selectMysql();

//点击博客查询按键

document.getElementById('table01').addEventListener('click',function(e){

let data = {

name:e.path[1].children[1].innerText

}

let url = 'http://127.0.0.1:8000/index_fontsize_select';

//传递给writeMysql()函数

writeMysql(data,url)

})