Chen Jian

以下代码中，如果第一次out.close()不报异常，则第二次也不会报 OutputStream out= new FileOutputStream( "c:/temp/result.xls"); out.close(); out.close();

引用 double beginTime = System.currentTimeMillis(); //do sth. double endTime = System.currentTimeMillis(); double second = (endTime – beginTime)/1000; double minute = second/60; double hour = minute/60; System.out.println("总耗时："+second+"秒,"+minute+"分，"+hour+"小时");

String filename=  "侬好.txt"; filename = URLEncoder.encode(filename,"utf-8");   response.setHeader("Content-disposition","attachment; filename="+filename);

    务必先画一个流程图再写代码，否则，你很难保证不犯错误：要么少写一个break，要么提前continue……

这是在jre代码中写死了的!

‘\u007f’, 单引号不能丢 如果要用字符串，则表示为 String.valueOf(‘\u007f’)

40139.41

全角空格的Unicode码是12288 16进制为 3000 在java里就是 ‘\u3000’

摘自 http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html JAVADOC TAGS The Javadoc tool parses special tags when they are embedded within a Java doc comment. These doc tags enable you to autogenerate a complete, well-formatted API from your source code. The tags start with an "at" sign (@) and are case-sensitive — they must be typed with the uppercase and lowercase …

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    一定要确定charset，不要糊里糊涂就这样过去