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Default

IaaS指提供系统（可以自己选）或者储存空间之类的硬件，软件要自己手动装。PaaS提供语言环境和框架（可以自己选）。SaaS只能使用开发好的软件（卖软件本身，如税务会计、表格文字处理）。BaaS一般类似于非关系数据库，但各家不通用
云服务的特点：零前期成本 & 按需付费 & 弹性（类似于租，可随时多加、退掉；但没有残值）、高可用（放在机房中，不同AZ间水电隔离）

	package com.omusic.library.utils;

	import java.io.BufferedInputStream;
	import java.io.ByteArrayOutputStream;
	import java.io.FileInputStream;
	import java.io.IOException;
	import java.net.InetAddress;
	import java.net.NetworkInterface;
	import java.net.SocketException;
	import java.util.Collections;

	// http://stackoverflow.com/questions/17535918/aes-gets-different-results-in-ios-and-java

	- (NSData )AES256EncryptWithKey:(NSString )key {
	// 'key' should be 32 bytes for AES256, will be null-padded otherwise
	char keyPtr[kCCKeySizeAES256+1]; // room for terminator (unused)
	bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)

	// fetch key data
	[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];

	@echo off
	netsh interface portproxy delete v4tov4 listenport=9222 listenaddress=0.0.0.0
	start /b cmd /c call "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --user-data-dir=dev-mode-removeme --disk-cache-dir=null --overscroll-history-navigation=0 --disable-web-security -–allow-file-access-from-files "%~dp0/src/index.html"
	timeout 5
	netsh interface portproxy add v4tov4 listenport=9222 connectaddress=127.0.0.1 connectport=9222 listenaddress=0.0.0.0
	cls
	echo ============================================
	echo Chrome started with following configuration:
	echo ============================================
	echo * No-Caching

	// our configuration model
	class BouquetConfiguration extends ArrayList<String> {

	int howMany(String flower) {
	return this.count { it == flower }
	}

	String toString() {
	return "Bouquet: " + this.toString()
	}