大约有 40,000 项符合查询结果（耗时：0.0413秒） [XML]
mqtt协议一般最大支持订阅几个主题？ - 创客硬件开发 - 清泛IT社区，为创新赋能！
...阅无限个主题（理论上受限于内存和CPU）。但在生产环境中，你可以通过配置 max_subscriptions 参数来设置全局或每个客户端的最大订阅数，以防止滥用。Mosquitto： 轻量级的开源Broker。在其配置文件 (mosquitto.conf) 中，可以使用 max_su...
【原因】Al伴侣出现错误: invoke: no method named Theme' in class edu.mi...
...in class edu.mit.appinventor.aicompanion3.Screen1
原因：aiStarter中AI伴侣版本 或者 其他任何途径中的AI伴侣版本过低导致的。
解决：升级到最新的AI伴侣即可。
升级可参考：https://www.fun123.cn/reference/creative/ai2_starter.html
AppInventor写二进制文件 - App应用开发 - 清泛IT社区，为创新赋能！
...组件返回的字节列表（list），目前不能直接追加到拓展中，可以采用遍历字节列表，然后将字节逐一将追加到拓展中，最后调用拓展方法保存为二进制文件。
QRCodeGenerator 拓展使用后，apk编译失败 - 用户反馈 - 清泛IT社区，为创新赋能！
...也有，类重复了导致编译失败。
查了一下原版的帖子中有人提出过这个问题，但是作者没有解决。
我们决定重写一下这个拓展，技术路径一致，但是不打包zxing库，解决apk编译问题。
拓展开发中。。
https://www.fun123.cn/refe...
How to solve “Could not establish trust relationship for the SSL/TLS secure channel with authority”
...
As a workaround you could add a handler to the ServicePointManager's ServerCertificateValidationCallback on the client side:
System.Net.ServicePointManager.ServerCertificateValidationCallback +=
(se, cert, chain, sslerror) =>
{
return true;
...
How SID is different from Service name in Oracle tnsnames.ora
...
Quote by @DAC
In short: SID = the unique name of
your DB, ServiceName = the alias used
when connecting
Not strictly true. SID = unique name of the INSTANCE (eg the oracle process running on the machine). Oracle considers the "Database" to be the files.
Service Name = alias to a...
simple HTTP server in Java using only Java SE API
...er solution is not portable across JREs. Its better to use the official webservices API in javax.xml.ws to bootstrap a minimal HTTP server...
import java.io._
import javax.xml.ws._
import javax.xml.ws.http._
import javax.xml.transform._
import javax.xml.transform.stream._
@WebServiceProvider
@Serv...
ExpressJS How to structure an application?
...
├── routes // The route definitions and implementations
├── services // The standalone services (Database service, Email service, ...)
└── views // The view rendered by the server to the client (e.g. Jade, EJS, ...)
App.js
The goal of the app.js file is to bootstrap the ex...
How can I delete a service in Windows?
I have a couple old services that I want to completely uninstall. How can I do this?
13 Answers
...
Dealing with “java.lang.OutOfMemoryError: PermGen space” error
...X:+CMSPermGenSweepingEnabled
You can do that by shutting down the tomcat service, then going into the Tomcat/bin directory and running tomcat6w.exe. Under the "Java" tab, add the arguments to the "Java Options" box. Click "OK" and then restart the service.
If you get an error the specified servic...