Google App Engine 可让您在 Google 的基础架构上运行您的网络应用程序。App Engine 应用程序易于构建和维护，并可根据您的访问量和数据存储需要的增长轻松扩展。使用 Google App Engine，将不再需要维护服务器：您只需上传您的应用程序，它便可立即为您的用户提供服务.
更新内容：
Google App Engine SDK for Java 1.3.2
New API to read the contents of uploaded Blobs (fetch_data)
URLFetch now supports accessing ports 80-90, 440-450, and 1024-65535
Mail API now allows common document formats as attachments
The Task Queue API now supports adding multiple tasks in a single call to Queue.add()
Fixed charset handling for inbound emails
Fixed issue with compositing background colors in dev_appserver
New feature in the datastore to specify whether to use strong or eventually consistent reads (the default is strong)
New datastore feature allows setting deadlines for operations
Increased the maximum Task Queue refill rate from 20/s to 50/s
Support for IP blacklisting to prevent denial of service (DoS) attacks
App Stats is now available for the Java SDK in addition to Python
Fix issue with expiration times not being reset on Put on the Memchache API
Fix issue preventing static files from being served when a servlet is mapped to root
JDO/JPA Changes
Support default rpc deadlines and query-specific deadlines
Support default read consistency config and query-specific read consistency config
Version 1.3.0 - December 14, 2009
Adds support for the new Blobstore API
New com.google.appengine.runtime.{version,environment} system properties (and a SystemProperty accessor class)
New sample applications for GWT 2.0
Optimizations for many reflection operations
Incorrect exception for multiple fields of same type