我有一个程序,它将我的访问数据库和导出为CSV。一切都很好,但导入CSV的程序有一些硬编码的正则表达式,无法处理某些数据类型的不同格式。
日期
IS:Fri May 01 01 00:00:00 EDT 2015
需要:2015年5月1日00:00:00
布尔吗
不确定这些字段是否是布尔值但是
IS:TRUE或FALSE
需要:0或1
货币
IS:0
需求:0.00美元
字符串
IS:字符串
需要:"字符串"
阅读完文档后,这一行跳出了我的行,#em;行值是强类型的Java对象。在Jackcess中,列类型由名为DataType的Java枚举表示。" 非常感谢任何帮助。
答案 0 :(得分:0)
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,
披露:我是这个图书馆的作者。它是开源和免费的(Apache V2.0许可证)。