如何从Mysqll读取数据写入csv文件

import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;

public class DataIntoCSV{
public static void main(String[] args){
int index;
ArrayList dataList=null;
String CSVFileName="ratingdata.csv";
BufferedWriter bufferedWriter=null;
try{
dataList=new ArrayList();
Class.forName("com.mysql.jdbc.Driver");

java.sql.Connection connect=DriverManager.getConnection("jdbc:mysql://localhost:3306/recomdatabase","root","123456");

Statement stmt=connect.createStatement();
ResultSet rs=stmt.executeQuery("select * from preferences");
while(rs.next()){
//System.out.println("  "+rs.getString("userID"));
//  System.out.println("  "+rs.getString("movieID")+"   ");
// System.out.print("  "+rs.getString("preference"));
dataList.add(rs.getString("userID"));
dataList.add(rs.getString("movieID"));
dataList.add(rs.getString("preference"));
}

try{
bufferedWriter=new BufferedWriter(new OutputStreamWriter(
new FileOutputStream("D://dataset//"+CSVFileName),"SHIFT_JIS"));

for(index=0;index<dataList.size();index++){
if(index%3!=2)
{  bufferedWriter.write(new String ((dataList.get(index)+",").getBytes("SHIFT_JIS")));}
else{
bufferedWriter.write(new String((dataList.get(index)+"\r\n").getBytes("SHIFT_JIS")));
}

}

bufferedWriter.flush();
bufferedWriter.close();
}catch(FileNotFoundException e){
e.printStackTrace();
}
// for(int n =0;n<dataList.size();n++){
//   System.out.println(dataList.get(n));
// }
}catch(Exception e){
e.printStackTrace();
}
}
}