Hi,
i have a code to read from Excel and stroe in Database, the Attributes in the Excel file:
you can notice that, the Table have a duplicate values, what i want it is to eliminate any duplicate value.
In my code i used two Arraylist, the first to store cells, the second to store rows, so i thought instead Arraylist i can use Set (with Set no duplicate values)
but somehow i failed to make it correct, or my idea was not good enough
so Where should i use Set in my code??
i have a code to read from Excel and stroe in Database, the Attributes in the Excel file:
Code:
CD_ID Albumtitel Interpret Year Track Titel
----------------------------------------------------------------------------------------------
4711 Not That Kind Anastacia 1999 1 Not That Kind
4710 Not That Kind Anastacia 1999 2 Im Outta Love
4713 Not That Kind Anastacia 1999 3 Cowboys & Kisses
4722 Wish You Her Pink Floyd 1964 1 Shine On You Crazy Diamond
4713 Not That Kind Anastacia 1999 3 Cowboys & Kisses
4711 Not That Kind Anastacia 1999 1 Not That Kind
4712 Love me Sp.Girls 1998 1 Viva for ever
4710 Not That Kind Anastacia 1999 2 Im Outta Love
4722 Wish You Her Pink Floyd 1964 1 Shine On You Crazy DiamondIn my code i used two Arraylist, the first to store cells, the second to store rows, so i thought instead Arraylist i can use Set (with Set no duplicate values)
but somehow i failed to make it correct, or my idea was not good enough
Code:
import java.io.File;
import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.Iterator;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
public class Excel2DB3 {
//static ArrayList cellArrayLisstHolder = new ArrayList();
public static void main(String[] args) throws Exception{
ArrayList dataHolder = readExcelFile();
saveToDatabase(dataHolder);
}
public static ArrayList readExcelFile(){
ArrayList dataSheet = new ArrayList();
try {
FileInputStream file = new FileInputStream(new File("d:\\Songs.xls"));
//Get the workbook instance for XLS file
HSSFWorkbook workbook = new HSSFWorkbook(file);
//Get first sheet from the workbook
HSSFSheet sheet = workbook.getSheetAt(0);
//Iterate through each rows from first sheet
Iterator<Row> rowIterator = sheet.iterator();
while(rowIterator.hasNext()) {
Row row = rowIterator.next();
//display from the first row
if(row.getRowNum() > 0)
{
//For each row, iterate through each columns
Iterator<Cell> cellIterator = row.cellIterator();
ArrayList data = new ArrayList();
while(cellIterator.hasNext()) {
//Getting the cell contents
Cell cell = cellIterator.next();
data.add(cell);
}
dataSheet.add(data);
}
}
}catch (Exception e){e.printStackTrace();
}
return dataSheet;
}
private static void saveToDatabase(Set dataHolder) {
String url = "jdbc:mysql://localhost:3306/songs";
String username = "root";
String password = "root";
Connection con = null;
String query = "insert into lieder values(?,?,?,?,?,?)";
PreparedStatement ps = null;
try {
////////////////////////make connection withthe database ///////////////////////////////
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection(url, username, password);
////////////////////////////////// Excute SQL statment: ///////////////////////////////////////
ps = con.prepareStatement(query);
ArrayList cellStoreArrayList = null;
//For inserting into database
for (int i = 0; i < dataHolder.size(); i++) {
cellStoreArrayList = (ArrayList) ((ArrayList) dataHolder).get(i);
ps.setString(1,((HSSFCell)cellStoreArrayList.get(0)).toString());
ps.setString(2,((HSSFCell)cellStoreArrayList.get(1)).toString());
ps.setString(3,((HSSFCell)cellStoreArrayList.get(2)).toString());
ps.setString(4,((HSSFCell)cellStoreArrayList.get(3)).toString());
ps.setString(5,((HSSFCell)cellStoreArrayList.get(4)).toString());
ps.setString(6,((HSSFCell)cellStoreArrayList.get(5)).toString());
ps.executeUpdate();
}
} catch(Exception e) {
e.printStackTrace();
}
finally{
try{
/////////////////////////////handle the results: ///////////////////////////////////
ResultSet rs = ps.executeQuery("SELECT * from lieder");
System.out.println(" Lieder :");
System.out.println(" ============== ");
while (rs.next()) {
double s = rs.getDouble("CD_ID");
String f = rs.getString("Albumtitel");
String i = rs.getString("Interpret");
double d = rs.getDouble("CREATED_DATE");
double n = rs.getDouble("Track");
String t = rs.getString("Titel");
System.out.println(s + " " + f + " " + i + " " + d + " " + n + " " + t);
}
ps.close();
con.close();
} catch(Exception ex) {
System.err.print("Exception: ");
System.err.println(ex.getMessage());
}
}
}
}