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j2ee,jsp,servlet文件下载服务器端
1.getOutputStream() has already been called for this response 报错的原因: 使用tomcat容器调用response.getOutputStream()方法的时候只能够写二进制文件. 但调用requonse.getWriter()方法时,则只能够在前台打印文本文件. 所以: 如果在jsp页面:    outPutStrea...
分类:Web程序   时间:2015-07-01 18:21:38    阅读次数:150
广告质量
介绍先介绍一下广告质量是什么的,贴一下Wiki的介绍:Quality Score is a variable used by Google, Yahoo! (called Quality Index), and Bing that can influence both the rank and co...
分类:其他好文   时间:2015-07-01 11:31:13    阅读次数:150
uva806 Spatial Structures
Spatial StructuresComputer graphics, image processing, and GIS (geographic information systems) all make use of a data structure called a quadtree. Qu...
分类:其他好文   时间:2015-07-01 00:57:29    阅读次数:507
Not for jazz
原文 We have an old musical instrument. It is called a clavichord. It was made in Germany in 1681. Our clavichord is kept in the living room. It has belonged to our family for a long time. The inst...
分类:其他好文   时间:2015-06-30 23:45:46    阅读次数:268
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
1. 程序时,出现运行时异常,如上图所示。2.异常原因分析。在ContentObserver的onChange方法中,调用了Toast.makeText方法。onChange方法应该在子线程运行,在android中的子线程中不能直接控制UI组件,否则就会报异常3.Looper类别用来为一个线程开启一...
分类:编程语言   时间:2015-06-30 17:56:13    阅读次数:150
Unity3D学习笔记第一课
第一课程:1.Unity类名必须与文件名保持一致2.讲属性设置为public可以在Unity中访问 public float speed; // Use this for initialization void Start () { } // Update is called once p...
分类:编程语言   时间:2015-06-29 08:42:32    阅读次数:212
讀入scanf,%d和%lld問題
在做一道題目時,用不同的格式化字符讀入在不同的OJ上會有不同的結果。 poj_2689/ uva_10140 Prime Distance poj題目鏈接:http://poj.org/problem?id=2689 題目: DescriptionThe branch of mathematics called number theory is about properties of num...
分类:其他好文   时间:2015-06-28 09:57:37    阅读次数:157
hdu 5112 A Curious Matt
题目连接http://acm.hdu.edu.cn/showproblem.php?pid=5112A Curious MattDescriptionThere is a curious man called Matt.One day, Matt's best friend Ted is wande...
分类:其他好文   时间:2015-06-27 16:12:13    阅读次数:105
sed:linux常用工具
参考文章:http://www.thegeekstuff.comsed工作原理This is called as one execution cycle. Cycle continues till end of file/input is reached: 1. Read a entire line from stdin/file. 2. Removes any trailing newline...
分类:系统相关   时间:2015-06-25 12:28:19    阅读次数:170
Yii前台后台登录混淆问题
我们在用yii开发项目时候,如果前后台使用modules实现那么做登录时候用户名就会出现前后台登录混淆的事情于是可以在adminModule.php文件中做个设置public function init() { // thismethod is called when the module is b...
分类:其他好文   时间:2015-06-25 08:55:10    阅读次数:146
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