jQuery+koa2如何实现Ajax请求-创新互联
这篇文章将为大家详细讲解有关jQuery+koa2如何实现Ajax请求，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
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之前写Ajax代码只管前端的实现，感觉这样导致自己对Ajax的请求的理解不够深入，所以写了这个从前端到后端的Ajax实现小demo，分别实现简单的GET和POST请求，加深下对前后端交互的理解。
技术栈
koa2
jQuer
需求
某些逻辑可以直接在前端处理，这里发给后端处理是为了更好地理解Ajax请求。
POST
通过填写编号和姓名并发送POST请求来保存人员信息，当信息未填写或填写不正确时给出格式错误的提醒；当信息填写正确但编号已存在时给出编号已存在的提醒；当信息填写正确且编号不存在时显示保存成功。
GET
通过填写编号并发送GET请求来查询人员信息，当编号未填写或填写不正确时给出格式错误的提醒；当编号填写正确且编号已存在时返回人员信息；当信息填写正确但编号不存在时显示人员不存在的错误提醒。
文件列表
dist
index.html
index.js
server.js
router.js
前端实现
html页面
index.html，简单的html页面，通过点击按钮发送json格式的Ajax请求:
Document
Hello World
编号
姓名
保存信息
编号
查询信息
基本
文件
流程
错误
SQL
调试
请求信息 : 2026-05-21 07:43:35 HTTP/1.1 GET : /article/ccodjo.html 运行时间 : 2.2517s ( Load:0.0063s Init:1.5217s Exec:0.7106s Template:0.0131s ) 吞吐率 : 0.44req/s 内存开销 : 2,238.57 kb 查询信息 : 12 queries 5 writes 文件加载 : 36 缓存信息 : 0 gets 0 writes 配置加载 : 130 会话信息 : SESSION_ID=h5ugih7bbph764mkr1d3tg8sp6
/www/wwwroot/tsicrk.com/index.php ( 1.09 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/ThinkPHP.php ( 4.61 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Think.class.php ( 12.26 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Storage.class.php ( 1.37 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Storage/Driver/File.class.php ( 3.52 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Mode/common.php ( 2.82 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Common/functions.php ( 53.56 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Hook.class.php ( 4.01 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/App.class.php ( 13.49 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Dispatcher.class.php ( 14.79 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Route.class.php ( 13.36 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Controller.class.php ( 11.23 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/View.class.php ( 7.59 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/BuildLiteBehavior.class.php ( 3.68 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ParseTemplateBehavior.class.php ( 3.88 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ContentReplaceBehavior.class.php ( 1.91 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Conf/convention.php ( 11.15 KB ) /www/wwwroot/tsicrk.com/App/Common/Conf/config.php ( 2.14 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Lang/zh-cn.php ( 2.55 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Conf/debug.php ( 1.49 KB ) /www/wwwroot/tsicrk.com/App/Home/Conf/config.php ( 0.31 KB ) /www/wwwroot/tsicrk.com/App/Home/Common/function.php ( 3.33 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ReadHtmlCacheBehavior.class.php ( 5.62 KB ) /www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php ( 6.02 KB ) /www/wwwroot/tsicrk.com/App/Home/Controller/CommController.class.php ( 1.60 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Model.class.php ( 60.11 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php ( 32.43 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db/Driver/Pdo.class.php ( 16.74 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Cache.class.php ( 3.83 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php ( 5.87 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template.class.php ( 28.16 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template/TagLib/Cx.class.php ( 22.40 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template/TagLib.class.php ( 9.16 KB ) /www/wwwroot/tsicrk.com/App/Runtime/Cache/Home/7540f392f42b28b481b30614275e4e55.php ( 17.71 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/WriteHtmlCacheBehavior.class.php ( 0.97 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.24 KB )
[ app_init ] --START-- Run Behavior\BuildLiteBehavior [ RunTime:0.000005s ] [ app_init ] --END-- [ RunTime:0.000028s ] [ app_begin ] --START-- Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000269s ] [ app_begin ] --END-- [ RunTime:0.000288s ] [ view_parse ] --START-- [ template_filter ] --START-- Run Behavior\ContentReplaceBehavior [ RunTime:0.000065s ] [ template_filter ] --END-- [ RunTime:0.000090s ] Run Behavior\ParseTemplateBehavior [ RunTime:0.009369s ] [ view_parse ] --END-- [ RunTime:0.009401s ] [ view_filter ] --START-- Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000198s ] [ view_filter ] --END-- [ RunTime:0.000221s ] [ app_end ] --START--
1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1
[ SQL语句 ] : SELECT `id`,`pid`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1
[ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
[ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( pid= ) [8] Undefined index: pid /www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php 第 47 行. [8] Undefined index: db_host /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 120 行. [8] Undefined index: db_port /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 121 行. [8] Undefined index: db_name /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 122 行.
2.2517s
