摘要： 【名词解释】跨域：https://developer.mozilla.org/en-US/docs/JavaScript/Same_origin_policy_for_JavaScript同源策略（注意Network Access这一节）：http://www.w3.org/Security/wik... 阅读全文

摘要： Cross-origin resource sharing(CORS) is a mechanism that allows many resources (e.g., fonts, JavaScript, etc.) on aweb pageto be requested from another... 阅读全文

摘要： It's common for software systems to make remote calls to software running in different processes, probably on different machines across a network. One... 阅读全文

摘要： 在数据查询时，尽量减少in子查询而使用表连接的方式进行，效率更高。 阅读全文

摘要： 在游标循环中，使用使用select into 变量var时，再判断var isnull 或者length（var）=0时，跳出循环。解决方式：使用set var=(select id from table);然后再判断var isnull 或者length（var）=0 阅读全文

摘要： redis提供了rate limit demo 如下所示：INCRkeyAvailable since 1.0.0.Time complexity:O(1)Increments the number stored atkeyby one. If the key does not exist, it ... 阅读全文

摘要： 问题：使用游标遍历时，发现使用select var into tmp where var=?然后判断if tmp is null时，不能走完所有的遍历。经debug发现，当var为空时，则跳出游标的遍历。解决方式：使用if not exists(select var into tmp where v... 阅读全文

摘要： Part Ireference from：http://gridgain.blogspot.kr/2014/09/two-phase-commit-for-distributed-in.html2-Phase-Commitis probably one of the oldest consensus... 阅读全文

摘要： Spring provides its own implementation of remoting service known asHttpInvoker. It can be used for http request than RMI and works well across the fir... 阅读全文

摘要： 概述继 Spring 2.0 对 Spring MVC 进行重大升级后，Spring 2.5 又为 Spring MVC 引入了注解驱动功能。现在你无须让 Controller 继承任何接口，无需在 XML 配置文件中定义请求和 Controller 的映射关系，仅仅使用注解就可以让一个 POJO ... 阅读全文