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À´×Ô:http://www.cnblogs.com/shiyangxt/archive/2008/07/30/1256813.html
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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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package testPackage;
class Test {
public static void main(String[] args) {
String hello = "Hello", lo = "lo";
System.out.print((hello == "Hello") + " ");
System.out.print((Other.hello == hello) + " ");
System.out.print((other.Other.hello == hello) + " ");
System.out.print((hello == ("Hel"+"lo ......
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String str="abc efg ABC";
String regEx="a|f"; //±íʾa»òf
Pattern p=Pattern.compile(regEx);
Matcher m=p.matcher(str);
boolean rs=m.find();
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