ͨ¹ýJava¼¸ÐдúÂë½ØÈ¡ÆÁÄ»
ͨ¹ýjava.awt.RobotµÄcreateScreenCapture½ØÆÁ¡£
public static void captureScreen(String fileName) throws Exception {
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle screenRectangle = new Rectangle(screenSize);
Robot robot = new Robot();
BufferedImage image = robot.createScreenCapture(screenRectangle);
ImageIO.write(image, "png", new File(fileName));
}
Ïà¹ØÎĵµ£º
1. MD5¼ÓÃÜ£¬³£ÓÃÓÚ¼ÓÃÜÓû§ÃûÃÜÂ룬µ±Óû§Ñé֤ʱ¡£
¡¡ ¡¡protected byte[] encrypt(byte[] obj) ...{
¡¡¡¡try ...{
¡¡¡¡MessageDigest md5 = MessageDigest.getInstance("MD5");
¡¡¡¡md5.update(obj);
¡¡¡¡return md5.digest();
¡¡¡¡} catch (NoSuchAlgorithmException e) ...{
¡¡¡¡e.printStackTrace();
¡ ......
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 ......
ÎÄÕÂÓÃʵÀý´úÂëչʾÁËJavaÖжàÏ̷߳ÃÎʹ²Ïí×ÊÔ´
ʱÏß³Ìͬ²½
µÄÖØÒªÐÔ¡£
·Ö±ðͨ¹ýÔÚÁ½¸öÏß³ÌÖÐͬʱ·ÃÎÊ(µ÷ÓÃget_id*·½·¨)¾¹ýͬ²½´¦Àí(lock¼°Synchronized)µÄ¹²Ïí×ÊÔ´(tmp)¼°Î´¾¹ýͬ²½´¦ÀíµÄ¹²Ïí×ÊÔ´(tmp)À´ËµÃ÷ͬ²½´¦ÀíµÄµÄ×÷Óá£
mainÖзÖÁ½²¿·Ö:
1£©Ç°°ë²¿·Ö£¬non-synchronization²¿·ÖÓÃÀ´²âÊÔûÓÐ×öͬ²½´¦ÀíµÄ´úÂë ......
JDBC¶ÁÈ¡Êý¾Ý¿âÔªÊý¾Ý,Éú³ÉJAVAʵÌåÀà
package com.nffish.util;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import com.nffish.c ......