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abhishek upamanyu
applet connected to table in MS Access database
0 Answer(s)      3 years and 7 months ago
Posted in : Applet


i have connected my java code with the MS access database and this is my code, can anyone tell me how to show the table in an applet...pls

	
	import java.sql.*;

	public class TestDBDriver {
    static Connection con;
    static Statement stmt;
    static ResultSet rs;

    public static void main(String[] args) {

    //step 1: load driver
    loadDriver();

    //step 3: establish connection
    makeConnection();

    //create a table
    createTable();

    //insert data
    insertData();

    //use precompiled statement to update data
    usePreparedStatement();

    //retrieve data
    retrieveData();

    //close all resources
    closeAll();
}

// load a driver
static void loadDriver() {
    try {
        //step 2: Define connection URL
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    } catch(java.lang.ClassNotFoundException e) {
        System.err.print("ClassNotFoundException: ");
        System.err.println(e.getMessage());
    }
}

// make a connection  step 3: establish connection
static void makeConnection() {
   //for how to set up data source name see below.
   String dsn = "judydriver";


String url =
    "jdbc:odbc:DRIVER={Microsoft Access Driver (*.mdb)};DBQ=faltu.mdb";

 // String url = "jdbc:odbc:" + dsn;
    try {
       con = DriverManager.getConnection(url);
    }catch(SQLException ex) {
       System.err.println("database connection: " + ex.getMessage());
    }
}

//create a table
static void createTable() {
    String createString = "create table COFFEES " +
                      "(COF_NAME VARCHAR(32), " +
                      "SUP_ID INTEGER, " +
                      "PRICE FLOAT, " +
                      "SALES INTEGER, " +
                      "TOTAL INTEGER)";



    try {
        //step 4: create a statement
        stmt = con.createStatement();
        //step 5: execute a query or update.
        stmt.execute("drop table COFFEES");//if exists, drop it, get new one
        stmt.executeUpdate(createString);

    }catch(SQLException ex) {
        System.err.println("CreateTable: " + ex.getMessage());
    }
 }

 //insert data to table COFFEES
 static void insertData() {
    try {
        stmt.executeUpdate("INSERT INTO COFFEES " +  "VALUES ('Colombian', 101, 7.99, 0, 0)");
        stmt.executeUpdate("INSERT INTO COFFEES " +  "VALUES ('French_Roast', 49, 8.99, 0, 0)");
        stmt.executeUpdate("INSERT INTO COFFEES " +  "VALUES ('Espresso', 35, 5.99, 0, 0)");
        stmt.executeUpdate("INSERT INTO COFFEES " +  "VALUES ('Colombian_Decaf', 101, 4.99, 0, 0)");
        stmt.executeUpdate("INSERT INTO COFFEES " +  "VALUES ('French_Roast_Decaf', 49,6.99, 0, 0)");

    }catch(SQLException ex) {
        System.err.println("InsertData: " + ex.getMessage());
    }
 }

//use PreparedStatement to precompile sql statement
static void usePreparedStatement() {
    try {
        PreparedStatement updateSales;
        String updateString = "update COFFEES " +
                  "set SALES = ? where COF_NAME like ?";
        updateSales = con.prepareStatement(updateString);
        int [] salesForWeek = {175, 150, 60, 155, 90};
        String [] coffees = {"Colombian", "French_Roast", "Espresso",
                 "Colombian_Decaf", "French_Roast_Decaf"};
        int len = coffees.length;
        for(int i = 0; i < len; i++) {
            updateSales.setInt(1, salesForWeek[i]);
            updateSales.setString(2, coffees[i]);
            updateSales.executeUpdate();
        }
    }catch(SQLException ex) {
        System.err.println("UsePreparedStatement: " + ex.getMessage());
   }
}

//retrieve data from table COFFEES
static void retrieveData() {
   try {
       String gdta="SELECT COF_NAME, PRICE FROM COFFEES WHERE PRICE < 9.00";
       //step 6: process the results.
       rs = stmt.executeQuery(gdta);
       while (rs.next()) {
            String s = rs.getString("COF_NAME");
            float n = rs.getFloat("PRICE");
            System.out.println(s + "   " + n);
       }
   }catch(SQLException ex) {
       System.err.println("RetrieveData: " + ex.getMessage());
   }
 }

//close statement and connection
//step 7: close connection, etc. 
 static void closeAll() {
     try {
        stmt.close();
        con.close();
     } catch(SQLException ex) {
        System.err.println("closeAll: " + ex.getMessage());
     }
}

}

Thanks;


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