import java.sql.Connection;
import java.util.HashMap;
import java.util.Iterator;

/**
 * The Class GridConnector.
 */
public class GridConnector extends BaseConnector {
    
    /** The extra info , which need to be mixed in output */
    protected StringBuffer extra_output = new StringBuffer();
    
    /** The collections of options */
    protected HashMap<String,BaseConnector> options = new HashMap<String,BaseConnector>(); 
    
    /**
     * Instantiates a new grid connector.
     * 
     * @param db the db connection
     */
    public GridConnector(Connection db){
        this(db,DBType.Custom);
    }

    /**
     * Instantiates a new grid connector.
     * 
     * @param db the db connection
     * @param db_type the db type
     */
    public GridConnector(Connection db, DBType db_type){
        this(db,db_type, new GridFactory());
    }
    
    /**
     * Instantiates a new grid connector.
     * 
     * @param db the db connection
     * @param db_type the db type
     * @param a_factory the class factory, which will be used by object
     */
    public GridConnector(Connection db, DBType db_type, BaseFactory a_factory){
        super(db,db_type,a_factory);
    }

.....................

Connection conn= null;
        try {

            //获得数据库连接
            conn = ConnectionManager.getConnection();

            //Dhtmlx连接
            GridConnector c = new GridConnector(conn,DBType.MSSQL);

 * The Enum DBType.
 * 
 * Stores supported DB types
 */
public enum DBType {
    
/** The Common SQL. */
    SQL,
/** The MySql. */
MySQL,
/** The Oracle. */
Oracle,
/** The MSSQL. */
MSSQL,
/** The PostgreSql. */
PostgreSQL,
/** The Custom DB type ( will be defined by class factory ) */
Custom
}