jiangduxi
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最新评论
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snow8261：
太粗略了。
企业架构之数据架构 -
haithink：
面试成功没？
JVM 加载Class文件的原理及其机制 -
feisi0003731843：
不好意思我没有重启，重启后好多了，可有的地方回放还是不成功的。 ...
Selenium IDE测试ExtJs一种测试解决办法 -
feisi0003731843：
这个好像不行吧，我试过了不好使啊。还是用id来做的。不能用啊。 ...
Selenium IDE测试ExtJs一种测试解决办法 -
yuchensuifeng：
您好，静态页面是可以的，但是，我指定error-page为js ...
JSP创建错误处理页面
文章列表
Learn to Relax,If You Want to Be Successful in Life
The subject of relaxation is a big topic and a very important part of the Happy Venn Diagram.What's more,true relaxation not only makes you feel good,increasess self esteen, but it also puts your manifestation powers on after burners.
This ma ...
SOA很早以前就听说过，但是不是很熟，最近有时间研究下，给出一些自己的认识和知识的总结。
SOA：面向服务架构。其本质上是一种将系统模型和系统实现相分离。为什么会分离呢？引导分离的因素就是需求(众所周知，在项目中需求的变更无疑是给项目增大了很大的风险)。SOA本身是一个组件模型，它将 应用程序的不同功能单元---服务（service）。通过服务间定义良好的接口和约定联系起来。接口采用中立的方式定义，独立于具体实现服务的硬件平台、操作系统和编程语言，使得构建在这样的系统中的服务可以使用统一和标准的方式进行通信。这种具有中立的接口定义(没有强制绑定到特定的实现上)的特征称为服务之间的松耦合 ...
Cultural Development and Restructuring
To build a well-off society in all-round way calls for major efforts to develop socialist culture and spiritual civilization.In the present-day world, culture is interactive with economic and political activities, and its status and functions are becoming mor ...
软件需求分析其本质上就是分析软件中不同角色的不同形态。在具体的实践中可能会遇到一些问题。例如
引用
1.需求的完整性。要想绝对的完整那是很难的。我们只能无限的趋近这个完整性，但是要做到绝对的完整。我相信很难。正如你想保证程序的完全正确。我想没人敢怎么保证。敢保证的也不过是些不懂技术的人吧了。所以只有无限的趋近完整性。那么怎么做才能无限接近呢？要无限接近的话，只有让足够多的用户参与并且得到足够多的确认。因此需求更加强调足够多的用户中的角色、场景及其这些的交集。有相交的部分是离用户更贴近。更贴近那么也就更趋近于完整。
2. 需求引导的时候尽量避免技术驱动，毕竟使用者是不怎么喜欢听你专业的技术。使用者 ...
The choice between having a career or making time for love is an extremely personal and individual decision.There are many factors which can affect your choice, and there are many people who have discovered how to achieve a healthy work life balance that allows them to have both.
Careers and love ...
在数据库设计过程中，用户可能会经常会被一个问题缠绕：是否应该把所有表都按照第三范式来设计？表里面的字段到底该设置为多大长度合适？这些问题虽然小，但是如果设计不当则可能会给将来的应用带来很多的性能问题。
1. 优化表的数据类型
表需要使用何种数据类型，是需要根据应用来判断的，虽然应用设计的时候需要考虑字段的长度留有一定的冗余，但是不赞成让很多字段都留有大量的冗余，这样既浪费磁盘存储空间，同时在应用程序操作时也浪费物理内存。
在MySQL中，可以使用函数PROCEDUER ANALYSE()对当前应用的表进行分析，该函数可以对数据表中列的数据类型提出优化建议，用户可以根据实际情况酌情考 ...
在总结需求分析之前，我先谈谈我对事物的认识吧。因为人对事物的认识才能有自己的观点，每个人观点不一样因此对事物理解不一样。也就是在获取需求和分析需求不一样。
学习和实践任何技术和事物都存成开始的入门和 ...
Many people believe that they will be happy once they arrive at some specific goal they set for themselves. However, more often than not, once you arrive "there"you will still feel dissatisfied, and move your "there"vision to yet another point in the future.By always chasing after ...
拥塞现象是指到达通信子网中某一部分的分组数量过多，使得该部分网络来不及处理，以致引起这部分乃至整个网络性能下降的现象，严重时甚至会导致网络通信业务陷入停顿，即出现死锁现象。这种现象跟公路网中经常所 ...
A man may usually be known by the books he reads as well as by the company he keeps; for there is a companionship of book as well as of men; and one should always live in the best company, whether it be of books or of men.
a good book may be among the best of friends. it is the same today that it a ...
Young people on the move face bureaucratic(官僚)hurdles.
EVER since Jing Youliang graduated from Wuhan University in 2003,he's been on the move. In the past four years, the 26-year-old has worked in Guangzhou, Wuhan and now Beijing.
Each of those moves gave Jing a headache - not because of all the ...
Just like every Friday, I had to rush into work, barely making it on time. No sooner had I put my bag on the table and sat myself down, than the HR manager came up to me with another resume. Could this be the one? I asked myself.
I had submitted my letter of resignation a few weeks before. Procedur ...
You know, it’s funny the way things seem to happen. Five minutes of one day can change the rest of your life. I know it did mine. And that change taught me that letting loose and giving in to a spur-of-the-moment【1】 idea is what life is all about. I recently was given the opportunity to do reseach on ...
When I was a little girl, I found love in a box all because of a class assignment. On a Friday night I made an announcement at the dinner table. The words bubbled out in a torrent of excitement I could no longer contain. "My teacher said we have to bring a box for our valentines on Monday. But i ...
前面也有一些优化的策略，现在在看看一些优化关于Group BY 语句、 Order By语句 等。
优化GROUP BY语句
默认情况下，MySQL对所有GROUP BY col1，col2...的字段进行排序。这与在查询中指定ORDER BY col1,col2...类似。因此，如果显式包括 ...