java»ñÈ¡¿Í»§¶Ëip
public String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
Ïà¹ØÎĵµ£º
Java NIO APIÏê½â
ÔÚJDK
1.4ÒÔǰ£¬JavaµÄIO²Ù×÷¼¯ÖÐÔÚjava.ioÕâ¸ö°üÖУ¬ÊÇ»ùÓÚÁ÷µÄ×èÈû£¨blocking£©API¡£¶ÔÓÚ´ó¶àÊýÓ¦ÓÃÀ´Ëµ£¬ÕâÑùµÄAPIʹÓúܷ½
±ã£¬È»¶ø£¬Ò»Ð©¶ÔÐÔÄÜÒªÇó½Ï¸ßµÄÓ¦Óã¬ÓÈÆäÊÇ·þÎñ¶ËÓ¦Óã¬ÍùÍùÐèÒªÒ»¸ö¸üΪÓÐЧµÄ·½Ê½À´´¦ÀíIO¡£´ÓJDK 1.4Æð£¬NIO
API×÷Ϊһ¸ö»ùÓÚ»º³åÇø£¬²¢ÄÜÌṩ·Ç×èÈû(non-blo ......
µÚÒ»£¬Ì¸Ì¸final, finally, finalizeµÄÇø±ð¡£
×î³£±»Îʵ½¡£
µÚ¶þ£¬Anonymous Inner Class (ÄäÃûÄÚ²¿Àà) ÊÇ·ñ¿ÉÒÔextends(¼Ì³Ð)ÆäËüÀ࣬ÊÇ·ñ¿ÉÒÔimplements(ʵÏÖ)interface(½Ó¿Ú)?
µÚÈý£¬Static Nested Class ºÍ Inner ClassµÄ²»Í¬£¬ËµµÃÔ½¶àÔ½ºÃ(ÃæÊÔÌâÓеĺÜÁýͳ)¡£
µÚËÄ£¬&ºÍ&&µÄÇø±ð¡£
Õâ¸öÎʵúÜÉÙ¡£
......
´ÓÍøÉϲéÕÒ×ÊÁÏjava/jsp»ñµÃ¿Í»§¶Ë(IE)Íø¿¨MACµØÖ·µÄ·½·¨´ó¸ÅÓÐÈýÖÖ¡£
1¡¢Í¨¹ýÃüÁʽ£¬ÔÚ¿Í»§¶ËÖ´ÐÐIpconfig µÈµÈ
2¡¢Í¨¹ýActiveXµÄ·½·¨
3¡¢Í¨¹ýÏò137µÄ¶Ë¿Ú·¢ËͲéѯָÁîµÄ·½·¨
¼ò½é£º
µÚÒ»ÖÖ·½·¨,ÔÚÕæÕýÓõ½Ê±ºò²»ÖªµÀΪʲô»ñµÃmacµØÖ·µÄÖ¸Áî×èÈûÁË,²»ÍùϼÌÐøÖ´ÐС£¶øÇÒËÙ¶ÈÊÇÕâÈýÖÖ·½·¨ÖÐ×îÂýµÄÒ»ÖÖ¡£
´úÂëÈçÏ ......
¹Ø¼ü×Ö: java ½øÖÆ×ª»»
Ê®½øÖÆ×ª³ÉÊ®Áù½øÖÆ£º
Integer.toHexString(int i)
Ê®½øÖÆ×ª³É°Ë½øÖÆ
Integer.toOctalString(int i)
Ê®½øÖÆ×ª³É¶þ½øÖÆ
Integer.toBinaryString(int i)
Ê®Áù½øÖÆ×ª³ÉÊ®½øÖÆ
Integer.valueOf("FFFF",16).toString()
°Ë½øÖÆ×ª³ÉÊ®½øÖÆ
Integer.valueOf("876",8).toString()
¶þ½øÖ ......
.classÆäʵÊÇÔÚjavaÔËÐÐʱ¾Í¼ÓÔØ½øÈ¥µÄ
getClass()ÊÇÔËÐгÌÐòʱ¶¯Ì¬¼ÓÔØµÄ
ÏÂÃæÒÔÀý×Ó˵Ã÷:
Ê×ÏȽ¨Ò»¸ö»ùÀàBaseclass
package classyongfa;
public class Baseclass {
private String height;
public String getHeight()
{
return height;
}
public void setHeight(String height)
{
&n ......