javaÎļþ¹ýÂËÆ÷µÄʹÓÃ
javaÎļþ¹ýÂËÆ÷µÄʹÓôúÂëÈçÏ£º
²âÊÔ´úÂ룺package file;
import java.io.File;
public class fileFilter {
public static void main(String[] args) {
File file = new File("d:\\");//ÉèÖÃÎļþ·¾¶
for (File fileList : file.listFiles(new file.MyFileFilter())) {
System.out.println(fileList.getName());
}
}
}
¹ýÂËÆ÷´úÂ룺
package file;
import java.io.File;
import java.io.FileFilter;
public class MyFileFilter implements FileFilter {
//ʵÏÖFileFilterµÄ·½·¨
public boolean accept(File arg0) {
if (arg0.getName().endsWith(".class")) {
return true;
}
return false;
}
}
Ïà¹ØÎĵµ£º
ÀàµÄ³õʼ»¯ºÍ¶ÔÏó³õʼ»¯ÊÇ JVM ¹ÜÀíµÄÀàÐÍÉúÃüÖÜÆÚÖзdz£ÖØÒªµÄÁ½¸ö»·½Ú£¬Google ÁËÒ»±éÍøÂ磬ÓйØÀà×°ÔØ»úÖÆµÄÎÄÕµ¹ÊDz»ÉÙ£¬È»¶øÀà³õʼ»¯ºÍ¶ÔÏó³õʼ»¯µÄÎÄÕ²¢²»¶à£¬ÌرðÊÇ´Ó×Ö½ÚÂëºÍ JVM ²ã´ÎÀ´·ÖÎöµÄÎÄÕ¸üÊÇÏÊÓÐËù¼û¡£
±¾ÎÄÖ÷Òª¶ÔÀàºÍ¶ÔÏó³õʼ»¯È«¹ý³Ì½øÐзÖÎö£¬Í¨¹ýÒ»¸öʵ¼ÊÎÊÌâÒýÈ룬½«Ô´´úÂëת»»³É JVM ×Ö½ÚÂëºó£¬ ......
¶¨Òå:
SingletonģʽÖ÷Òª×÷ÓÃÊDZ£Ö¤ÔÚJavaÓ¦ÓóÌÐòÖУ¬Ò»¸öÀàClassÖ»ÓÐÒ»¸öʵÀý´æÔÚ¡£
Ôںܶà²Ù×÷ÖУ¬±ÈÈ罨Á¢Ä¿Â¼ Êý¾Ý¿âÁ¬½Ó¶¼ÐèÒªÕâÑùµÄµ¥Ï̲߳Ù×÷¡£
»¹ÓÐ, singletonÄܹ»±»×´Ì¬»¯;
ÕâÑù£¬¶à¸öµ¥Ì¬ÀàÔÚÒ»Æð¾Í¿ÉÒÔ×÷Ϊһ¸ö״̬²Ö¿âÒ»ÑùÏòÍâÌṩ·þÎñ£¬±ÈÈ磬ÄãÒªÂÛ̳ÖеÄÌû×Ó¼ÆÊýÆ÷£¬Ã¿´Îä¯ÀÀÒ»´ÎÐèÒª¼ÆÊý£¬µ¥Ì¬ÀàÄÜ·ñ ......
ǰÑÔ£º
±¾ÎÄÊǶÔJava¼¯ºÏ¿ò¼Ü×öÁËÒ»¸ö¸ÅÀ¨ÐԵĽâ˵£¬Ä¿µÄÊǶÔJava¼¯ºÏ¿ò¼ÜÌåϵÓиö×ÜÌåÈÏʶ£¬Èç¹ûÄãÏëѧϰ¾ßÌåµÄ½Ó¿ÚºÍÀàµÄʹÓ÷½·¨£¬Çë²Î¿´Java APIÎĵµ¡£
Ò»¡¢¸ÅÊö
Êý¾Ý½á¹¹¶Ô³ÌÐòÉè¼ÆÓÐ×ÅÉîÔ¶µÄÓ°Ï죬ÔÚÃæÏò¹ý³ÌµÄCÓïÑÔÖУ¬Êý¾Ý¿â½á¹¹ÓÃstructÀ´ÃèÊö£¬¶øÔÚÃæÏò¶ÔÏóµÄ±à³ÌÖУ¬Êý¾Ý½á¹¹ÊÇÓÃÀàÀ´ÃèÊöµÄ£¬²¢ÇÒ°üº¬ÓжԸÃÊ ......
1.Éú³ÉgifͼƬ¸ñʽµÄ
package com.cssweb.common.util;
import java.io.*;
import java.util.*;
import com.sun.image.codec.jpeg.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.awt.*;
import java.awt.image.*;
/*
* ¹¦ÄÜ£ºµ÷ÓÃAuthServlet¿ÉÒÔÉú³ÉÒ»¸öÑéÖ¤ÂëͼƬ,ͼƬµÄ¿í¶ÈºÍ¸ß¶È¿ÉÒ ......
ÓÃJava±àдӦÓÃʱ£¬ÓÐʱÐèÒªÔÚ³ÌÐòÖе÷ÓÃÁíÒ»¸öÏֳɵĿÉÖ´ÐгÌÐò»òϵͳÃüÁÕâʱ¿ÉÒÔͨ¹ý×éºÏʹÓÃJavaÌṩµÄRuntimeÀàºÍProcessÀàµÄ·½·¨ÊµÏÖ¡£ÏÂÃæÊÇÒ»ÖֱȽϵäÐ͵ijÌÐòģʽ£º
...
Process process = Runtime.getRuntime().exec(".\\p.exe");
process.waitfor( );
...
ÔÚÉÏÃæµÄ³ÌÐòÖУ¬µÚÒ»Ðеē.\\p.exe& ......