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File csvfile = new File("file.csv");
BufferedWriter bufferedWriiter = null;
bufferedWriiter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(csvfile),"SHIFT-JIS"));
FileOutputStream fout = new FileOutputStream(csvfile);
String id = "id1"
textvalue = "123
456";
fout.write((id + "," + textvalue + "\r\n").getBytes());