Java: How to export data (db, query or table contents) to Excel?

Question

I would like to know how to export the contents of a table or the data from a query to an Excel file. Also wich is the file extension that is better to export to, xls or csv?

Thanks in advance.

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Edit: What i want is the user to to be able to export the contents of a JTable -containing the results from a query- to an Excel compatible file, by pressing a button.

I don't know what is the best way to do it? I found various ways but i'm not sure which one to follow. Is it possible to generate a JasperReport then export tha same data to excel?

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Edit2:Ok so i decided to export to .csv like most of you suggest. My last question is which one is better to use, opecsv or javacsv ? Both seem really easy to use.

Thanks!

Answer 1

导出到csv更容易-可以根据数据手动进行手动操作（每个新行都是新行，并且单元格值用逗号分隔）-对此可以使用开源库（http：// opencsv.sourceforge.net/），并将结果集复制到输出中的代码应该很简单

Answer 2

如果您绝对需要Excel，请使用Apache POI库。

Answer 3

You have to create text file (csv) and write the result of database.

PrintWriter out
   = new PrintWriter(new BufferedWriter(new FileWriter("foo.csv")));

while(rs.next())
{
  out.println(String.format("%s,%s,%s",rs.getString(1),rs.getString(2),rs.getString(3));
}

Answer 4

In addition to the answers already given, I would like to say that I would prefer CSV.

CSV is application-agnostic and you could manipulate the data later on with any other language/program (Python, R, Java, Excel, etc).

Answer 5

I had good success with jXLS: http://jxls.sourceforge.net/

this lets you use JSP-like tags in a native Excel template with all the formatting etc. You pass data to substitute into that Excel template from Java API calls, via a Map structure (analogous to request scope vars.)

This is a good lighter-weight alternative to JasperReports if you just want formatted Excel output.