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¶ÔÓÚ Java 1.2£¬ÄúÖ»ÐèÓÃ
Authenticator.setDefault() °²×°Ò»¸ö Authenticator¡£ÕâÑù£¬µ±ÐèÒªÈÏ֤ʱ£¬ÒѰ²×°µÄ Authenticator µÄ
getPasswordAuthentication() ·½·¨¾Í»á±»µ÷Óã¬È»ºóÄú¾Í¿ÉÒÔÓÃÊʵ±µÄÓû§ÃûºÍ¿ÚÁîÀ´ÉèÖà PasswordAuthentication ʵÀý¡£¾ÍÕâô¼òµ¥¡£ 
 
package
cn.arthurs.web;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.Authenticator;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.PasswordAuthentication;
import java.net.URL;
import java.util.Properties;
import org.apache.log4j.Logger;
public class WebUnit {
 private static final Logger log = Logger.getLogger( WebUnit.class );
 
 /**
  * ·µ»ØÒ»¸öÍøÕ¾µÄÔ´´úÂë,ÐèÒª´«ÈëÒ»¸öÍøÕ¾µÄÍøÖ·
  * @param webUrl
  * @return
  */
 public static String getWebContent(String webUrl){
  URL url;
  HttpURLConnection conn;
  InputStream stream;
  StringBuffer  text  =  new  StringBuffer();
  String temp="";
  try {
   url = new URL(webUrl);
   
   //Èç¹ûÐèÒª´úÀí·þÎñÆ÷
   if(false){
      Properties prop =
System.getProperties();        
      // ÉèÖÃhttp·ÃÎÊҪʹÓõĴúÀí·þÎñÆ÷µÄµØÖ·           
      prop.setProperty("http.proxyHost",
"bmcdc.bmsa.com");        
      // ÉèÖÃhttp·ÃÎÊҪʹÓõĴúÀí·þÎñÆ÷µÄ¶Ë¿Ú           
      prop.setProperty("http.proxyPort",
"1865");        
      // ÉèÖò»ÐèҪͨ¹ý´úÀí·þÎñÆ÷


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CµÄenum struct ÒÔ¼° JavaµÄenum

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enum name{
a,b,c
};

 
struct name{
int a;
int b;
char c;
};

 
or
 
typedef struct{
int a;
int b;
char c;
}Name;

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enum name n1,n2,n3;
n1=a;
n2=b;
n3=enum name(3-1);
struct name sn1,sn2;
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JAVA¶¨Ê±Ö´ÐÐÈÎÎñµÄÈýÖÖ·½·¨

JAVA¶¨Ê±Ö´ÐÐÈÎÎñµÄÈýÖÖ·½·¨ 
1) java.util.Timer
Õâ¸ö·½·¨Ó¦¸ÃÊÇ×î³£Óõ쬲»¹ýÕâ¸ö·½·¨ÐèÒªÊÖ¹¤Æô¶¯ÄãµÄÈÎÎñ£º
Timer timer=new Timer();
timer.schedule(new ListByDayTimerTask(),10000,86400000);
ÕâÀïµÄListByDayTimerTaskÀà±ØÐëextends TimerTaskÀïÃæµÄrun()·½·¨¡£
2) ServletContextListener
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