просто делай
SELECT * FROM [таблица]; (в некоторую структуру данных)
FileWriter fstream = new FileWriter("out.txt");
BufferedWriter out = new BufferedWriter(fstream);
for(y=0; y<=[#rows]; y++){
for(x=0; x<=[#columns]; x++){
out.write([field]);
out.write(",");
}
out.write("\n");
}
out.close;