一个连接池的例子（来自JIVE）（5）

//文件：DbConnectionProvider.java
package com.qingtuo.db.pool;
import java.sql.*;
import java.util.*;
public abstract class DbConnectionProvider {
    /** Dummy values. Override in subclasses. **/
    private static final String NAME = "";
    private static final String DESCRIPTION = "";
    private static final String AUTHOR = "";
    private static final int MAJOR_VERSION = 0;
    private static final int MINOR_VERSION = 0;
    private static final boolean POOLED = false;
    /**
     * Returns the name of the connection provider.
     */
    public String getName() {
        return NAME;
    }
    /**
     * Returns a description of the connection provider.
     */
    public String getDescription() {
        return DESCRIPTION;
    }
    /**
     * Returns the author of the connection provider.
     */
    public String getAuthor() {
        return AUTHOR;
    }
    /**
     * Returns the major version of the connection provider, i.e. the 1 in 1.0.
     */
    public int getMajorVersion() {
        return MAJOR_VERSION;
    }
    public int getMinorVersion() {