如何将文本文件中的数据从 Java 插入到 SQL 服务器？

Question

I made this source code to try to insert data from a text file but it does not do what I want.

First I declare variables with assigned values to insert as default values to my table and then just take the new values entered through the text file. I do not know the correct insert I should use.

package Clases;
import java.sql.*;
import java.util.*;
import java.math.*;
public class Importar  {

    public static Connection Conexión;
    public static void main(String[] args) {

        try {
            Scanner lector = new Scanner(System.in);

            String ID_Origin = "NE001";
            short siPeriod = 2015;
            byte TypeTrans = 0;
            String ID_Entry = "";
            short siType = 0;
            String Concept = "";
            String ID_Class = "01"; 
            String ID_Budget = null;
            java.sql.Timestamp dtDate = null; 
            String ID_Cost = null;
            java.math.BigDecimal Debits = null;
            java.math.BigDecimal Credits = null;
            String ID_Currency = null;
            BigDecimal AmountFOB = BigDecimal.ZERO;
            BigDecimal CurrencyRate = BigDecimal.ZERO;
            boolean boCashFlow = false;
            short Status = 0;
            short StatusConsol = 0;
            System.out.println("ID_Entry");
            ID_Entry = lector.next();
            System.out.println("Concept");
            Concept = lector.next();
            System.out.println("dtDate");
            System.out.println("Debits");
            System.out.println("Credits");
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            Conexión = DriverManager.getConnection(
                "jdbc:sqlserver://SSL2541\\SQLEXPRESS:1433;" +
                "databaseName=namedatabase;user=sa;password=password");
            PreparedStatement enrollItmt;
            // This is where I have my confusion and did not return
            // anything the program   
            enrollItmt = Conexión.prepareStatement(
                "LOAD FROM 'C://Users//aurbina//Desktop//cargadatabase.txt' "
              + "INSERT INTO tablename( ID_Entry, siType, Concept, ID_Class, "
              + "dtDate, Debits, Credits)"
              + "VALUES (+Concept, +dtDate, +Debits, +Credits)");
            enrollItmt.execute();
        }
        catch(ClassNotFoundException | SQLException ex) {
        }
    }
}

Answer 1

Here is a simple Sample Example to Insert Text File to SQL Server Table as a help. Can be modified accordingly

import com.microsoft.sqlserver.jdbc.SQLServerBulkCSVFileRecord;
import com.microsoft.sqlserver.jdbc.SQLServerBulkCopy;
import com.microsoft.sqlserver.jdbc.SQLServerBulkCopyOptions;
import java.sql.Types;
import java.util.Date;
import java.sql.*;
import java.util.*;

public class App {
    public static void main( String[] args ) {
        Connection Conexión;
        Conexión = DriverManager.getConnection(
            "jdbc:sqlserver://SSL2541\\SQLEXPRESS:1433;" +
            "databaseName=namedatabase;user=sa;password=password");

        String tablename = "dbo.filetable";

        try {
            File file = new File("file.txt");
            //The Text File has three columns "ID", "FirstName", "Lastname" separated 
            //by comma as delimiter.

            //The Table (tablename) in SQL Server also has same Number of Columns.

            FileReader fr = new FileReader(file);
            BufferedReader br = new BufferedReader(fr);
            StringBuffer sb = new StringBuffer();
            String line;
            while((line=br.readLine())!=null) {
                sb.append(line);
                sb.append("\n");
            }
            fr.close();



            //try (InputStream inputStream = new FileInputStream(file)) {
            try (InputStream inputStream = new 
                 ByteArrayInputStream(sb.toString().getBytes(StandardCharsets.UTF_8))) 
            {
                //System.out.println("file to be copied to " + tablename);

                // Column information
                SQLServerBulkCSVFileRecord fileRecord = new 
                      SQLServerBulkCSVFileRecord(inputStream, 
                            StandardCharsets.UTF_8.name(), "\\,", true);

                //Here ,  is delimiter in Test File.

                fileRecord.addColumnMetadata(1, "ID", Types.VARCHAR, 0, 0);
                fileRecord.addColumnMetadata(2, "FirstName", Types.VARCHAR, 0, 0);
                fileRecord.addColumnMetadata(3, "LastName", Types.VARCHAR, 0, 0);

                // Setting bulk insert options(batch size). Insert each 10000 rows in 
                //bulk from N number of rows in Text File.

                SQLServerBulkCopyOptions copyOptions = new SQLServerBulkCopyOptions();
                copyOptions.setBatchSize(10000);

                try (SQLServerBulkCopy bulkCopy = new 
                          SQLServerBulkCopy(Conexión))
                {
                    bulkCopy.setBulkCopyOptions(copyOptions);
                    bulkCopy.setDestinationTableName(tablename);
                    bulkCopy.writeToServer(fileRecord);
                }

                System.out.println("Data from text file Inserted from Java to 
                                    SQLserver Done");

            } catch (Exception e) {
                e.printStackTrace();
            }
    }
}