Read excel Query DB and email missing records

Hi,

I was following following link


http://www.roseindia.net/tutorial/java/poi/readExcelFile.html

I read attached excel whose content is like

username      password      
john      pass1      
eric      word1      


I got output on the console fine.



I want to capture the username and password to form one sql query to check the database



I changed the program like
import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Iterator;
import java.util.Vector;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

public class POIRIRaw4EE {
      public static void main( String [] args ) {
            String fileName="C:\\File.xls";
            Vector dataHolder=read(fileName);
            checkDatabase(dataHolder);
      }
      public static Vector read(String fileName)    {
            Vector cellVectorHolder = new Vector();
            try{
                  FileInputStream myInput = new FileInputStream(fileName);
                  POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);
                  HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);
                  HSSFSheet mySheet = myWorkBook.getSheetAt(0);
                  Iterator rowIter = mySheet.rowIterator();
                  while(rowIter.hasNext()){
                        HSSFRow myRow = (HSSFRow) rowIter.next();
                        Iterator cellIter = myRow.cellIterator();
                        Vector cellStoreVector=new Vector();
                        while(cellIter.hasNext()){
                              HSSFCell myCell = (HSSFCell) cellIter.next();
                              cellStoreVector.addElement(myCell);
                        }
                        cellVectorHolder.addElement(cellStoreVector);
                  }
            }catch (Exception e){e.printStackTrace(); }
            return cellVectorHolder;
      }
      private static void checkDatabase(Vector dataHolder) {
            String username="";
            String password="";
            PreparedStatement pstmt = null;      
            for (int i=1;i<dataHolder.size(); i++){
                  Vector cellStoreVector=(Vector)dataHolder.elementAt(i);
                  for (int j=1; j < cellStoreVector.size();j++){
                        HSSFCell myCell = (HSSFCell)cellStoreVector.elementAt(j);
                        String stringCellValue = myCell.toString();
                        //String st = myCell.toString();
                        username=stringCellValue.substring(1);
                        password=stringCellValue.substring(0);
                        System.out.println("value username--->"+username);
                        //userkey1=st.substring(0);
                        System.out.println("value password-->"+password);
                  }
                  if(i!=0)      try{
                        Class.forName("com.mysql.jdbc.Driver").newInstance();
                        Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root", "root");
                        Statement stmt = con.createStatement();
                        ResultSet rs1 = stmt.executeQuery("select * from login where username='username' and password='password'");
                        while (rs1.next()){
                              String rec1 = rs1.getString(1);
                              String rec2 = rs1.getString(2);
                              System.out.println("rec1 is"+rec1+"rec2 is"+rec2);
                        }


                        pstmt.close();
                        con.close();
                  }
                  catch(Exception e){}
            }
      }
}



Issue I faced was following system out is not showing correct values.

System.out.println("value userkey10--->"+userkey10);

System.out.println("value userkey1-->"+userkey1);

Console shows like this

value username--->ass1
value password-->pass1
value username--->ord1
value password-->word1

password is showing correct but username is not correct.So my query also failing.

I need to enhance this program to see database missing records compared to excel records and send email to user.



 

Any ideas, suggestions, sample code, links, source code highly appreciated. Thanks in advance
File.xls
LVL 7
gudii9Asked:
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gudii9Connect With a Mentor Author Commented:
i eliminated one for loop and removed substring which resolved the issue
import java.io.*;
import java.sql.*;
import java.util.*;
import java.util.regex.*;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;


import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.ResourceBundle;
import java.util.Vector;
public class POIRIInsert {
      public static void main( String [] args ) {
            String fileName="C:\\File.xls";
            Vector dataHolder=read(fileName);
            saveToDatabase(dataHolder);
      }
      public static Vector read(String fileName)    {
            Vector cellVectorHolder = new Vector();
            try{
                  FileInputStream myInput = new FileInputStream(fileName);
                  POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);
                  HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);
                  HSSFSheet mySheet = myWorkBook.getSheetAt(0);
                  Iterator rowIter = mySheet.rowIterator();
                  while(rowIter.hasNext()){
                        HSSFRow myRow = (HSSFRow) rowIter.next();
                        Iterator cellIter = myRow.cellIterator();
                        Vector cellStoreVector=new Vector();
                        while(cellIter.hasNext()){
                              HSSFCell myCell = (HSSFCell) cellIter.next();
                              cellStoreVector.addElement(myCell);
                        }
                        cellVectorHolder.addElement(cellStoreVector);
                  }
            }catch (Exception e){e.printStackTrace(); }
            return cellVectorHolder;
      }
      private static void saveToDatabase(Vector dataHolder) {
            String usernamefield="";
            String passwordfield="";
            List list = new ArrayList();


            for (int i=1;i<dataHolder.size(); i++){
                  System.out.println("Data is inserted--->"+dataHolder.size());
                  Vector cellStoreVector=(Vector)dataHolder.elementAt(i);
                  //      for (int j=0; j < cellStoreVector.size();j++){
                  HSSFCell myCell = (HSSFCell)cellStoreVector.elementAt(0);
                  String stringCellValue = myCell.toString();
                  usernamefield=stringCellValue;


                  myCell = (HSSFCell)cellStoreVector.elementAt(1);
                  stringCellValue = myCell.toString();
                  passwordfield=stringCellValue;
            

            try{
                  Class.forName("com.mysql.jdbc.Driver").newInstance();
                  Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root", "root");
                  Statement stat=con.createStatement();
                  int k=stat.executeUpdate("insert into login(username,password) value('"+usernamefield+"','"+passwordfield+"')");
                  System.out.println("Data is inserted");
                  stat.close();
                  con.close();
            }
            catch(Exception e){}
            

            finally{

            }

            }


      }

}
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