Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

JavaÊý¾Ý¿âÁ¬½Ó³ØÀàÔ´Âë

À´×Ô:http://www.cnblogs.com/shiyangxt/archive/2008/07/30/1256813.html
»·¾³£ºMyEclipse
 
Êý¾Ý¿â£ºmysql
 
Ê×ÏÈн¨JavaÏîÄ¿£¬È»ºóн¨Á½¸öÀ࣬һ¸öÊý¾Ý¿âÁ¬½Ó³ØÀ࣬һ¸ö²âÊÔÀà¡£
 
·Ö±ðÃüÃûConnectionPool£¬ConnectionPoolTest¡£
 
È»ºóн¨Ò»¸öÅäÖÃÎļþ£¬ÃüÃû£ºdbpool.properties¡£
 
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


Ïà¹ØÎĵµ£º

¶¼ÊDZàÂëÈǵĻö java±à³Ì

    ×î½üÔÚÓÃÈóǬÔÚ×öһЩwebÏîÄ¿µÄ±¨±í£¬ÆäÖÐÓÐÒ»¸öÅúÁ¿´òÓ¡µÄ±¨±í¡£ÐèÒª°Ñ²ÎÊý´«µ½±¨±íÀµ±°ÑÖÐÎÄ´«µ½ÀïÃæÊ±×ÜʱÂÒÂ룬²ÉÓÃÁ˸÷ÖÖתÂ뷽ʽ£¬Ò²Ã»×ª¹ýÀ´£¬ÔÎ.........
Ϊʲô»áÓÐÕâô¶àµÄ±àÂ룬ºÃÍ·ÌÛѽ... ......

JAVA¹æ·¶Ñ§Ï°——String×ÖÃæ³£Á¿

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 ......

java³ÌÐòÔ±³É³¤È«¼Æ»®

=====================================
ǰÑÔ
ÔÚ̫ԭ¾­ÀúÁËÒ»ÄêµÄÍ´¿à¿ª·¢Ö®ºó£¬ÏîÄ¿ÒѾ­ÈÕÇ÷Îȶ¨£¬½ÓÏÂÀ´µÄ¹¤×÷¾ÍÊÇÄÃÏÖÓеĴúÂëµ½ÆäËûµÄÊ¡ÊнøÐÐʵʩ¡¢È»ºó×öһЩ±¾µØ»¯¿ª·¢¡£ÈÕ×ÓÏà¶ÔÇáËÉÁËÐí¶à£¬ÓÚÊÇ¿ÉÒÔ³é³öʱ¼äÀ´ÎÂϰһÏ»ù´¡µÄ¼¼Êõ֪ʶ£¬¸ø×Ô¼ºÁÐÁËÒ»¸ö¸´Ï°Ìá¸Ù£¬ÕâÒ²ÊÇÒ»¸öjava³ÌÐòÔ±ËùÓ¦¸ÃÕÆÎÕµÄ֪ʶÂöÂç¡£
=== ......

JAVA ÕýÔò±í´ïʽ4ÖÖ³£ÓõŦÄÜ

ÕýÔò±í´ïʽÔÚ×Ö·û´®´¦ÀíÉÏÓÐ×ÅÇ¿´óµÄ¹¦ÄÜ£¬sunÔÚjdk1.4¼ÓÈëÁ˶ÔËüµÄÖ§³Ö
ÏÂÃæ¼òµ¥µÄ˵ÏÂËüµÄ4ÖÖ³£Óù¦ÄÜ£º
²éѯ£º
ÒÔÏÂÊÇ´úÂëÆ¬¶Î£º
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();
Èç¹ûstrÖÐÓÐregEx£¬ÄÇôrsΪtru ......

C/C++ÓÚJavaÖ®¼äµÄ»¥Ïàµ÷ÓÃ

ÀûÓÃJNI¼¼Êõ£¬¿ÉÒÔ×öµ½C/C++ÓëJavaÖ®¼äµÄÏ໥µ÷Óá£
1¡¢Javaµ÷ÓÃC/C++½Ó¿Ú
Õâ¸öÊÇJNI×î»ù±¾µÄÓ¦Óã¬JNIÓкܶàÕâ·½ÃæµÄÀý×Ó´úÂë¡£Ò»°ã°ÑC/C++д³É¶¯Ì¬Á´½Ó¿â£»ÔÚJava³ÌÐòÔÚLoadLibrary£¬ÀûÓÃnative½Ó¿Ú£¬¼´¿ÉÍê³Éµ÷Óá£
2¡¢C/C++»Øµ÷Java½Ó¿Ú
ÕâÖÖÓ÷¨£¬JNIµÄÀý×ӱȽÏÉÙ¡£Æäʵ£¬Ò²±È½Ï¼òµ¥£¬JNIÒ²ÌṩÁËÕâÑùµÄ½Ó¿Ú¡ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ