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дÈë´úÂ룺
ConnectionPool.java
 
Code
package webbook.util;
import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import java.util.Vector;
public class ConnectionPool {
    private Vector<Connection> pool;
    private String url;
    private String username;
    private String password;
    private String driverClassName;
    /** *//**
     * Á¬½Ó³ØµÄ´óС£¬Ò²¾ÍÊÇÁ¬½Ó³ØÖÐÓжàÉÙ¸öÊý¾Ý¿âÁ¬½Ó¡£
     */
    private int poolSize = 1;
    private static ConnectionPool instance = null;
    /** *//**
     * ˽ÓеĹ¹Ôì·½·¨£¬½ûÖ¹Íⲿ´´½¨±¾ÀàµÄ¶ÔÏó£¬ÒªÏë»ñµÃ±¾ÀàµÄ¶ÔÏó£¬Í¨¹ý<code>getIstance</code>·½·¨¡£
     * ʹÓÃÁËÉè¼ÆÄ£Ê½Öеĵ¥×Óģʽ¡£
     */
    private ConnectionPool() {
        init();
    }
    /** *//**
     * Á¬½Ó³Ø³õʼ»¯·½·¨£¬¶ÁÈ¡ÊôÐÔÎļþµÄÄÚÈÝ ½¨Á¢Á¬½Ó³ØÖеijõʼÁ¬½Ó
     */
    private void init() {
        pool = new Vector<Connection>(poolSize);
        readConfig();
        addConnection();
    }
    /** *//**
     * ·µ»ØÁ¬½Óµ½Á¬½Ó³ØÖÐ
     */
    public synchronized void release(Conn


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import java.io.FileWriter;
import java.io.IOException;
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import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
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