我构建了一个程序,该程序获取我的访问DB并导出到CSV。一切都很好,但是接受导出的CSV的程序有一些硬编码的正则表达式,不能处理某些数据类型的不同格式。
日期:2015年5月1日星期五00:00:00美国东部时间
需求:5/1/2015 00:00:00
布尔?
不确定这些字段是否为布尔值,但是
IS: TRUE或FALSE
需求:0或1
是:0
需求:$0.00
是:字符串
需要:"string"
在通读了文档之后,这一行跃入我的眼帘:行值是强类型Java对象。在jacess中,列类型由名为DataType的Java枚举表示。"如有任何帮助,不胜感激。
使用univoc -parser:
Writer output = new StringWriter(); // use a FileWriter for your case
CsvWriterSettings writerSettings = new CsvWriterSettings(); //many options here, check the tutorial
ObjectRowWriterProcessor writerProcessor = new ObjectRowWriterProcessor(); // handles rows of objects and conversions to String.
writerSettings.setRowWriterProcessor(writerProcessor);
writerSettings.setHeaders("A", "B", "C", "D", "E", "F", "G", "H");
CsvWriter writer = new CsvWriter(output, writerSettings);
writerProcessor.convertFields(Conversions.toBoolean("0", "1")).add("C", "H"); // will write "0" and "1" instead of "true" and "false" on column "C" and "H"
writerProcessor.convertFields(Conversions.toDate("M/d/YYYY HH:mm:ss")).add("A", "E");
writerProcessor.convertFields(Conversions.formatToBigDecimal("$#0.00")).add("B", "D");
writer.writeHeaders();
writer.processRecord(new Date(), BigDecimal.TEN, true, new BigDecimal("999.99"), new Date(), "some text here", null, false);
writer.processRecord(new Date(), BigDecimal.ZERO, false, null, null, null, "more text here", null);
writer.close();
System.out.println(output.toString()); //and here is the result
输出将是:
A,B,C,D,E,F,G,H
7/8/2015 07:09:58,$10.00,0,$999.99,7/8/2015 07:09:58,some text here,,1
7/8/2015 07:09:58,$0.00,1,,,,more text here,
声明:我是这个库的作者。它是开源和免费的(Apache V2.0许可)。