http://baitian.javaeye.com UTF-8 Copyright 2003-2008, JavaEye.com http://blogs.law.harvard.edu/tech/rss JavaEye - 做最棒的软件开发交流社区 baitian 作者: baitian  链接：http://baitian.javaeye.com/blog/183480  发表时间: 2008年04月16日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

搞了一个最小的mysql集群，
MGM Node & SQL Node on 1.1,DATA Node 1 on 1.2,DATA Node 2 on 1.3,
然后 在1.4 上安装一个 普通的mysql ,
最后， 分别在1.1 和 1.4 上 跑同样的测试程序， 得到集群的速度只有普通Mysql 的 将近 六分之一。
想请问一下高手，这个正常吗？
（mysql 5.051a, network 1000M以太网，1.x 配置相同（centos5,8 core,4G ram））

测试程序：
batchUpdate, manual commit(1s per),
sql: update table1 set field1=value1 where id=value1; id (primary key),value1 无规律，随即产生。
cluster table type=ndb
1.4 table type=innodb
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]]> Wed, 16 Apr 2008 17:59:37 +0800 http://baitian.javaeye.com/blog/183480 http://baitian.javaeye.com/blog/183480 baitian 作者: baitian  链接：http://baitian.javaeye.com/blog/60714  发表时间: 2007年03月18日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

首先是要有一定的Java基础，
入门我推荐的是sun网站上的JFC tutorial
java.sun.com/docs/books/tutorial/uiswing/index.html">http://java.sun.com/docs/books/tutorial/uiswing/index.html

入门之后的书籍呢？
中文的比较经典，比较系统的Swing书籍是
JAVA2图形设计卷2:SWING aspx?pno=TS008033">http://www.dearbook.com.cn/book/viewbook.aspx?pno=TS008033
JFC核心编程（第2版） aspx?pno=TS0018989">http://www.dearbook.com.cn/book/viewbook.aspx?pno=TS0018989
这两本都是经典书籍，都不错，缺点是比较早，都是在JDK1.3以前的

最近的新书有两本
JAVA SWING(第二版) aspx?pno=TS0027715">http://www.dearbook.com.cn/book/viewbook.aspx?pno=TS0027715
JFC SWING标准教材（第二版） aspx?pno=TS0028428">http://www.dearbook.com.cn/book/viewbook.aspx?pno=TS0028428

英文的新书我比较喜欢的是
Manning - JAVA Swing 2nd.Edition (2004).pdf
这本书在国外的评价也挺高的，基于JDK1.4，讲得比较深入，例子也比较有用

当然，工作看书之余还需要关注一些东西，比如一些优秀的项目，Swing开发经验分享，
这些从哪里来呢？
国内论坛上相关的资源比较少，而且大多数停留在新手问问题的阶段，
所以做Swing的话，要习惯上英文站点，习惯看英文资料，习惯看英文的ebook，
下面是我的收藏夹中的一些站点
java.com/blog/">http://www.clientjava.com/blog/
这个站点非工作日几乎每天都会更新，java 客户端的新闻，还有做java客户端的老外的
blog更新，这个站点像窗口一样，使我对Swing的了解面大有提升
java.net/javadesktop/">http://community.java.net/javadesktop/
官方站点，更新不快，不过发布的文章什么的还是值得一看的
javadesktop.org/forums/index.jspa">http://www.javadesktop.org/forums/index.jspa
官方的论坛，你提的问题可能是Sun的工程师来回答你哦

中文的Java Gui站点我好像没看到过，国内相关的东西还是太少
论坛中java gui的板块有：
javaworld.com/post/page?bid=6&sty=1&age=0">http://bbs.chinajavaworld.com/post/page?bid=6&sty=1&age=0
http://www.cjsdn.net/post/page?bid=46&sty=1&age=30
javaresearch.org/forum/forum.jsp?column=286">http://www.javaresearch.org/forum/forum.jsp?column=286

做Swing的不能埋头做Swing
Swing的一大优势就是网上资源的丰富
下面我列一些比较流行、比较Cool的组件
http://www.jgoodies.com
java.net/">https://jdic.dev.java.net/
java.net/">https://jdnc.dev.java.net/
http://www.einnovation.com/projects/eiicommons/
http://www.yworks.com/
http://www.infonode.net/
具体自己上网看看啦
找组件可以到这两个网址看看：
javadesktop.org/rollups/components/index.html">http://javadesktop.org/rollups/components/index.html
java.net/projects/community/javadesktop">http://community.java.net/projects/community/javadesktop
也可以到sourceforge搜搜看
如果觉得自己的swing程序比较ugly的话，可以到下面网页上去看看
http://www.javootoo.com/
上面罗列了很多Swing Look & Feel
有很多很PP的

关于Swing的性能
推荐一下这份资料
java.sun.com/docs/books/performance/">http://java.sun.com/docs/books/performance/
作者是 Sun´s Java Performance Team 中的，而且原来是
Swing Team负责人之一，所以这份资料也从各个方面讲述
Swing的性能问题
另外提供两份资料，是最近的sun desktop关于
java client 性能问题的会议上的资料
附件[High-Performance Clients 1 Minimizing Startup Time.pdf]：
http://blog.blogchina.com/upload/2005-02-22/2005022219264771860.pdf
附件[High-Performance Clients Runtime Graphics and UI Performance.pdf]：
http://blog.blogchina.com/upload/2005-02-22/20050222192431495749.pdf

Swing相关的知识：
1 javabean Swing是附和java bean规范的，也用到了java.beans package里不少内容
还是推荐sun的资料：java.sun.com/docs/books/tutorial/javabeans/">http://java.sun.com/docs/books/tutorial/javabeans/
2 java thread 对于java线程的理解和掌握是编出反应敏捷，高质量的Swing程序的必备知识
经典的书籍：Concurrent Programming in Java

Orelly Java Thread 3rd
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]]> Sun, 18 Mar 2007 17:23:21 +0800 http://baitian.javaeye.com/blog/60714 http://baitian.javaeye.com/blog/60714 baitian 作者: baitian  链接：http://baitian.javaeye.com/blog/32478  发表时间: 2006年11月04日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

工作中涉及到corba开发.选用mico.2.3.12;.net2003(vc7)

状况:
需要在corba服务端提供一个供客户端调用的带参数的方法int xx(int y,int h);
xx方法中代码要调用一个DLL的方法int zz(int* p,int* q).(DLL是客户提供的,不能改)
zz方法中参数是与xx方法的参数相对应.
也就是说,zz方法的参数就是xx方法的参数的地址.

问题:
由于IDL不支持指针.因此不能把xx方法的参数改为指针类型,也不能使用(地址运算)&y,&h.
我应该怎么办?
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]]> Sat, 04 Nov 2006 20:24:51 +0800 http://baitian.javaeye.com/blog/32478 http://baitian.javaeye.com/blog/32478 baitian 作者: baitian  链接：http://baitian.javaeye.com/blog/32383  发表时间: 2006年11月04日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

环境:winxp .net2003

状况:
a.cpp 中显式动态调用一个DLL,相关代码如下:
xx(){
/**..other code...**/
HINSTANCE dllinstance;
dllinstance=LoadLibrary("lpsolve55.dll");
FARPROC myproc;
myproc =GetProcAddress(dllinstance,"minfriction");
FreeLibrary(dllinstance);
}

如我将 xx()方法中这段代码去掉,在命令行下(将编译命令写在一个文件里通过nmake执行)可以成功编译.
加上这段代码后,编译出现以下错误:

“dllinstance” : 未声明的标识符
“LoadLibrary” : 不是“operator``global namespace''”的成员
“dllinstance”: 即使使用参数相关的查找，也未找到标识符
“LoadLibrary”: 即使使用参数相关的查找，也未找到标识符
“dllinstance”: 即使使用参数相关的查找，也未找到标识符
“FARPROC” : 未声明的标识符
语法错误 : 缺少“)”(在“__cdecl”的前面)
“myproc” : 未声明的标识符
“GetProcAddress” : 不是“operator``global namespace''”的成员
语法错误 : 缺少“;”(在标识符“GetProcAddress”的前面)
“GetProcAddress”: 即使使用参数相关的查找，也未找到标识符
“dllinstance”: 即使使用参数相关的查找，也未找到标识符
“myproc”: 即使使用参数相关的查找，也未找到标识符
“FreeLibrary” : 不是“operator``global namespace''”的成员

问题:
LoadLibrary,GetProcAddress,FreeLibrary属于windows api;
应该在编译的时候加入 什么参数?或者又该怎么做呢?
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]]> Sat, 04 Nov 2006 00:14:04 +0800 http://baitian.javaeye.com/blog/32383 http://baitian.javaeye.com/blog/32383 baitian 作者: baitian  链接：http://baitian.javaeye.com/blog/31149  发表时间: 2006年10月29日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

jxl的一些总结

要往xls文件里面写入数据的时候需要注意的是第一要新建一个xls文件
OutputStream os=new FileOutputStream("c:\\excel2.xls");

再建完这个文件的时候再建立工作文件
jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(new File(os));

如果这个文件已经存在,那么我们可以在这个文件里面加入一个sheet为了和以前的数据进行分开;
jxl.write.WritableSheet ws = wwb.createSheet("Test Sheet 1", 0);
在createSheet方法里前面的参数是sheet名，后面是要操作的sheet号

接下来就可以往这个文件里面写入数据了

写入数据的时候注意的格式

（1）添加的字体样式
jxl.write.WritableFont wf = new jxl.write.WritableFont(WritableFont.TIMES, 18, WritableFont.BOLD, true);
WritableFont()方法里参数说明：
这个方法算是一个容器，可以放进去好多属性
第一个: TIMES是字体大小，他写的是18
第二个: BOLD是判断是否为斜体,选择true时为斜体
第三个: ARIAL
第四个: UnderlineStyle.NO_UNDERLINE 下划线
第五个: jxl.format.Colour.RED 字体颜色是红色的

jxl.write.WritableCellFormat wcfF = new jxl.write.WritableCellFormat(wf);

jxl.write.Label labelC = new jxl.write.Label(0, 0, "This is a Label cell"，wcfF);
ws.addCell(labelC);
在Label()方法里面有三个参数
第一个是代表列数,
第二是代表行数，
第三个代表要写入的内容
第四个是可选项，是输入这个label里面的样式
然后通过写sheet的方法addCell（）把内容写进sheet里面。

（2）添加带有formatting的Number对象
jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");

（3）添加Number对象
（3.1）显示number对象数据的格式

jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");
jxl.write.WritableCellFormat wcfN = new jxl.write.WritableCellFormat(nf);

jxl.write.Number labelNF = new jxl.write.Number(1, 1, 3.1415926, wcfN);
ws.addCell(labelNF);
Number()方法参数说明:
前两上表示输入的位置
第三个表示输入的内容

（4）添加Boolean对象
jxl.write.Boolean labelB = new jxl.write.Boolean(0, 2, false);
ws.addCell(labelB);

（5）添加DateTime对象
jxl.write.DateTime labelDT = new jxl.write.DateTime(0, 3, new java.util.Date());
ws.addCell(labelDT);
DateTime()方法的参数说明
前两个表示输入的位置
第三个表示输入的当前时间

（6）添加带有formatting的DateFormat对象
这个显示当前时间的所有信息，包括年月日小时分秒
jxl.write.DateFormat df = new jxl.write.DateFormat("dd MM yyyy hh:mm:ss");
jxl.write.WritableCellFormat wcfDF = new jxl.write.WritableCellFormat(df);
jxl.write.DateTime labelDTF = new jxl.write.DateTime(1, 3, new java.util.Date(), wcfDF);
ws.addCell(labelDTF);

（7）添加带有字体颜色Formatting的对象
jxl.write.WritableFont wfc = new jxl.write.WritableFont(WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false,UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.RED);
jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(wfc);

import="jxl.format.*
jxl.write.WritableFont wfc = new jxl.write.WritableFont(WritableFont.ARIAL,20,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.GREEN);

（8）设置单元格样式

jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(wfc);
wcfFC.setBackGround(jxl.format.Colour.RED);//设置单元格的颜色为红色
wcfFC = new jxl.write.Label(6,0,"i love china",wcfFC);


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]]> Sun, 29 Oct 2006 20:26:33 +0800 http://baitian.javaeye.com/blog/31149 http://baitian.javaeye.com/blog/31149 baitian 作者: baitian  链接：http://baitian.javaeye.com/blog/60740  发表时间: 2005年12月01日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

Steve Jobs to 2005 graduates: 'Stay hungry, stay foolish'

'You've got to find what you love,' Jobs says


This is the text of the Commencement address by Steve Jobs, CEO of Apple Computer and of Pixar Animation Studios, delivered on June 12, 2005.

I am honored to be with you today at your commencement from one of the finest universities in the world. I never graduated from college. Truth be told, this is the closest I've ever gotten to a college graduation. Today I want to tell you three stories from my life. That's it. No big deal. Just three stories.

The first story is about connecting the dots.

I dropped out of Reed College after the first 6 months, but then stayed around as a drop-in for another 18 months or so before I really quit. So why did I drop out?

It started before I was born. My biological mother was a young, unwed college graduate student, and she decided to put me up for adoption. She felt very strongly that I should be adopted by college graduates, so everything was all set for me to be adopted at birth by a lawyer and his wife. Except that when I popped out they decided at the last minute that they really wanted a girl. So my parents, who were on a waiting list, got a call in the middle of the night asking: "We have an unexpected baby boy; do you want him?" They said: "Of course." My biological mother later found out that my mother had never graduated from college and that my father had never graduated from high school. She refused to sign the final adoption papers. She only relented a few months later when my parents promised that I would someday go to college.

And 17 years later I did go to college. But I naively chose a college that was almost as expensive as Stanford, and all of my working-class parents' savings were being spent on my college tuition. After six months, I couldn't see the value in it. I had no idea what I wanted to do with my life and no idea how college was going to help me figure it out. And here I was spending all of the money my parents had saved their entire life. So I decided to drop out and trust that it would all work out OK. It was pretty scary at the time, but looking back it was one of the best decisions I ever made. The minute I dropped out I could stop taking the required classes that didn't interest me, and begin dropping in on the ones that looked interesting.

It wasn't all romantic. I didn't have a dorm room, so I slept on the floor in friends' rooms, I returned coke bottles for the 5& deposits to buy food with, and I would walk the 7 miles across town every Sunday night to get one good meal a week at the Hare Krishna temple. I loved it. And much of what I stumbled into by following my curiosity and intuition turned out to be priceless later on. Let me give you one example:

Reed College at that time offered perhaps the best calligraphy instruction in the country. Throughout the campus every poster, every label on every drawer, was beautifully hand calligraphed. Because I had dropped out and didn't have to take the normal classes, I decided to take a calligraphy class to learn how to do this. I learned about serif and san serif typefaces, about varying the amount of space between different letter combinations, about what makes great typography great. It was beautiful, historical, artistically subtle in a way that science can't capture, and I found it fascinating.

None of this had even a hope of any practical application in my life. But ten years later, when we were designing the first Macintosh computer, it all came back to me. And we designed it all into the Mac. It was the first computer with beautiful typography. If I had never dropped in on that single course in college, the Mac would have never had multiple typefaces or proportionally spaced fonts. And since Windows just copied the Mac, its likely that no personal computer would have them. If I had never dropped out, I would have never dropped in on this calligraphy class, and personal computers might not have the wonderful typography that they do. Of course it was impossible to connect the dots looking forward when I was in college. But it was very, very clear looking backwards ten years later.

Again, you can't connect the dots looking forward; you can only connect them looking backwards. So you have to trust that the dots will somehow connect in your future. You have to trust in something
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]]> Thu, 01 Dec 2005 15:00:40 +0800 http://baitian.javaeye.com/blog/60740 http://baitian.javaeye.com/blog/60740