hexid的专栏

 Up until now, the counter examples have demonstrated how servlet state persists between accesses. This solves only part of the problem. Every time the server is shut down or the servlet is reloaded

在servlet上设置权限, 例如beta版本就设置它只能运行在客户的特定服务器上面, 不让它能够到处运行There are many ways to put this server information to productive use. Lets assume youve written a servlet and you dont want it running just

Writing to a Temporary FileThe javax.servlet.context.tempdir attribute maps to a temporary directory where short-lived working files can be stored. Each context receives a different temporary dir