如何将数据从数据库导出到csv文件？

Question

I'm working on an android project and a part of it is to export datas from my database to a csv file.

I already read a lot of thread especially opencsv and try this:

CSVWriter writer = null;
    try {
        writer = new CSVWriter(my file name);
        // just an example
        String[] entries = "1,2,3,4,5,6".split(",");
        writer.writeNext(entries);
    } catch (IOException e) {
        // TODO: handle exception
    }

The file is created but his size is 0KB.

I try to figure it out with another way. See the Code below:

 File myFile = new File(my file name);

        myFile.createNewFile();
        FileOutputStream fOut = new FileOutputStream(myFile);
        OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);

And I used append to put some piece of information but I've got the same problem.

Is anybody has another way to figure this out or what I missed in the example above?

Answer 1

Is your file really empty ? depending on the data you're exporting, your file may indeed be much less than 1K. I must admit I don't know android so I don't know how it handles very small files size indication...