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

1. koa2

2. 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

1. dist

1. index.html

2. index.js

2. server.js

3. 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:

 
 
 


 

 
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 : 2026-05-14 04:44:35 HTTP/1.1 GET : /article/ihohjd.html
运行时间 : 2.7934s ( Load:0.0013s Init:0.0007s Exec:2.7833s Template:0.0081s )
吞吐率 : 0.36req/s
内存开销 : 484.45 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=cjr6ip7f8chr3bulafv5dr6qd1
    
    
        

    

	
/home/wwwroot/bluegullmedia/wwwroot/index.php ( 1.09 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/ThinkPHP.php ( 4.61 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Think.class.php ( 12.26 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Storage.class.php ( 1.37 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Storage/Driver/File.class.php ( 3.52 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Mode/common.php ( 2.82 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Common/functions.php ( 53.56 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Hook.class.php ( 4.01 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/App.class.php ( 13.49 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Dispatcher.class.php ( 14.79 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Route.class.php ( 13.36 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Controller.class.php ( 11.23 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/View.class.php ( 7.59 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/BuildLiteBehavior.class.php ( 3.68 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/ParseTemplateBehavior.class.php ( 3.88 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/ContentReplaceBehavior.class.php ( 1.91 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Conf/convention.php ( 11.15 KB )
/home/wwwroot/bluegullmedia/wwwroot/App/Common/Conf/config.php ( 2.16 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Lang/zh-cn.php ( 2.55 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Conf/debug.php ( 1.49 KB )
/home/wwwroot/bluegullmedia/wwwroot/App/Home/Conf/config.php ( 0.31 KB )
/home/wwwroot/bluegullmedia/wwwroot/App/Home/Common/function.php ( 3.33 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/ReadHtmlCacheBehavior.class.php ( 5.62 KB )
/home/wwwroot/bluegullmedia/wwwroot/App/Home/Controller/ArticleController.class.php ( 6.02 KB )
/home/wwwroot/bluegullmedia/wwwroot/App/Home/Controller/CommController.class.php ( 1.60 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Model.class.php ( 60.11 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db.class.php ( 32.43 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db/Driver/Pdo.class.php ( 16.74 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Cache.class.php ( 3.83 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Cache/Driver/File.class.php ( 5.87 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Template.class.php ( 28.16 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Template/TagLib/Cx.class.php ( 22.40 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Template/TagLib.class.php ( 9.16 KB )
/home/wwwroot/bluegullmedia/wwwroot/App/Runtime/Cache/Home/7540f392f42b28b481b30614275e4e55.php ( 18.20 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/WriteHtmlCacheBehavior.class.php ( 0.97 KB )
/home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.24 KB )
    
    
        

    

	
[ app_init ] --START--
Run Behavior\BuildLiteBehavior [ RunTime:0.000012s ]
[ app_init ] --END-- [ RunTime:0.000049s ]
[ app_begin ] --START--
Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000066s ]
[ app_begin ] --END-- [ RunTime:0.000092s ]
[ view_parse ] --START--
[ template_filter ] --START--
Run Behavior\ContentReplaceBehavior [ RunTime:0.000116s ]
[ template_filter ] --END-- [ RunTime:0.000163s ]
Run Behavior\ParseTemplateBehavior [ RunTime:0.007247s ]
[ view_parse ] --END-- [ RunTime:0.007301s ]
[ view_filter ] --START--
Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000103s ]
[ view_filter ] --END-- [ RunTime:0.000129s ]
[ 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 /home/wwwroot/bluegullmedia/wwwroot/App/Home/Controller/ArticleController.class.php 第 47 行.
[2] mkdir(): Permission denied /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[2] mkdir(): Permission denied /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[8] Undefined index: db_host /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db.class.php 第 120 行.
[8] Undefined index: db_port /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db.class.php 第 121 行.
[8] Undefined index: db_name /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db.class.php 第 122 行.
    
    
        

    

	    
    
        

    

	    
    
    



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