Connecting to database through applet

Question

hi friends
I am trying to connect to sql database through applet but I cant.
in fact it can not connect to database.
plz any body tell me how can i do this. Thanks

Answer 1

// class depends on
//     msbase.jar
//     mssqlserver.jar
//     msutil.jar
// these api's are part of Microsoft SQL Server 2000 Driver for JDBC
// allso need JNDI file system Service provider: found @ sun http://java.sun.com/products/jndi/#DOWNLOAD12 the JNDI 1.2.X class librarys and
//          File system provider 1.2 beta 3
//     fscontext.jar
//     providerutil.jar
//      (jndi.jar) provided in java > 1.3*
// to compile:
// javac -classpath "C:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\msbase.jar;C:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\mssqlserver.jar;C:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\msutil.jar;C:\j2sdk1.4.2_01\jndi\lib\fscontext.jar;C:\j2sdk1.4.2_01\jndi\lib\jndi.jar;C:\j2sdk1.4.2_01\jndi\lib\providerutil.jar" SQLTest.java
import javax.sql.*;
import java.sql.*;
import javax.naming.*;
import java.util.Properties;
public class SQLTest extends Thread {
    String sqlServerUser = "sql login account";
    String sqlServerPWD = "sql password";
    String sqlServerName = "sql machine";
    String sqlServerPort = "1433";
    public SQLTest() {
    public static void main(String[] args) {
        (new SQLTest()).run();
    public void run(){
        Connection conn = null;
        try{
            Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
            conn = DriverManager.getConnection("jdbc:microsoft:sqlserver://" + sqlServerName + ":"+ sqlServerPort + ";User=" + sqlServerUser + ";Password=" + sqlServerPWD + ";ProgramName=JAVA-jdbc;DatabaseName=Northwind");
            Statement stmt = conn.createStatement();
            ResultSet result = stmt.executeQuery(
                "SELECT * from [Shippers]"
            if(result.next()){
                System.out.println(result.getString("CompanyName") + " " + result.getString("Phone"));
                while(result.next()) {   // for each row of data
                    System.out.println(result.getString("CompanyName") + " " + result.getString("Phone"));
            System.out.println("Getting a connection with drivermanager works fine");
        } catch(Exception e){
            e.printStackTrace(System.out);
        } finally{
            try{
                conn.close();
            } catch(Exception e){
                e.printStackTrace(System.out);
        if(true){return;}
// try it with a datasource
        try{
        // Setting the context:
            com.microsoft.jdbcx.sqlserver.SQLServerDataSource sds = new com.microsoft.jdbcx.sqlserver.SQLServerDataSource();
            sds.setServerName(sqlServerName);
            sds.setDatabaseName("Northwind");
            sds.setNetAddress(sqlServerPort);
            Properties p = new Properties();
            p.put(Context.INITIAL_CONTEXT_FACTORY,     "com.sun.jndi.fscontext.RefFSContextFactory");
            Context ctx = new InitialContext(p);
            try{
                ctx.unbind("jdbc/EmployeeDB");
            }catch(Exception e){
            }finally{
                ctx.bind("jdbc/EmployeeDB",sds);
            DataSource ds = (DataSource)ctx.lookup("jdbc/EmployeeDB");
            conn = null;
            conn = ds.getConnection(sqlServerUser,sqlServerPWD);
            Statement stmt = conn.createStatement();
            ResultSet result = stmt.executeQuery(
                "SELECT * from [Shippers]"
            if(result.next()){
                System.out.println(result.getString("CompanyName") + " " + result.getString("Phone"));
                while(result.next()) {   // for each row of data
                    System.out.println(result.getString("CompanyName") + " " + result.getString("Phone"));
            System.out.println("works with datasource");
        } catch(Exception e){
            e.printStackTrace(System.out);
        } finally{
            try{
                conn.close();
            } catch(Exception e){
                e.printStackTrace(System.out);
}To give an applet special privileges you can specify the prifs in the java.policy file or sign the applet and choose "yes I trust" or "yes I allways trust" when the applet is loaded.
To give special prifs with the java.policy, it should look like this:
grant {
permission java.lang.RuntimePermission "usePolicy"; // prevents the popup from showing for signed applets
grant codeBase "file:C:/-" {
  permission java.security.AllPermission;
grant codeBase "http://localhost/-" {
  permission java.security.AllPermission;
};