ÈçºÎʹÓÃProxyģʽ¼°JavaÄÚ½¨µÄ¶¯Ì¬´úÀí»úÖÆ
1.Proxy
ģʽ
´úÀíģʽ֧³Ö½«Ä³Ð©²Ù×÷´Óʵ¼ÊµÄ¶ÔÏóÖзÖÀë³öÀ´£¬Í¨¹ýËüµÄ´úÀíÀàÌṩ´¦Àí¡£ÕâÑù±ãÓÚÐ޸ĺ͹ÜÀíÕâÐ©ÌØ¶¨µÄ²Ù×÷¡£
ÏÂÃæÊ¾ÀýÒ»¸ö´úÀíģʽµÄʵÏÖ¡£
<<interface>>Subject.java
package
com.zj.proxy;
public
interface
Subject {
void
operation1();
void
operation2(String arg);
}
ÏÖʵÀà
RealSubject.java
package
com.zj.proxy;
public
class
RealSubject
implements
Subject {
public
void
operation1() {
System.
out
.println(
"Realer do operation1"
);
}
public
void
operation2(String arg) {
System.
out
.println(
"Realer do operation2 with "
+ arg);
}
}
´úÀíÀà
ProxySubject.java
package
com.zj.proxy;
public
class
ProxySubject
implements
Subject {
private
Subject
proxied
;
//
±»´úÀí¶ÔÏó
public
ProxySubject(Subject
proxied) {
this
.
proxied
= proxied;
}
public
void
operation1() {
System.
out
.println(
"Proxyer do operation1"
);
proxied
.operation1();
}
public
void
operation2(String arg) {
System.
out
.println(
"Proxyer do operation2 with "
+ arg);
proxied
.operation2(arg);
}
}
²âÊÔÀà
SimpleProxyDemo.java
package
com.zj.proxy.client;
import
com.zj.proxy.Subject;
import
com.zj.proxy.RealSubject;
import
com.zj.proxy.ProxySubject;
public
class
SimpleProx
Ïà¹ØÎĵµ£º
/**
*ÐèÒª´«Èë pageNo µ±Ç°Ò³
* pageSizeÒ»Ò³ÏÔʾµÄÌõÊý
  ......
¡¡¡¡javaÖÐÓÐÁ½ÖÖ°üµÄµ¼Èë»úÖÆ£¬×ܽáÈçÏ£º
¡¡¡¡µ¥ÀàÐ͵¼Èë(single-type-import)£¬ÀýÈçimport java.io.File;
¡¡¡¡°´ÐèÀàÐ͵¼Èë(type-import-on-demand)£¬ÀýÈç import java.io.*;
¡¡¡¡¹ØÓÚÕâÁ½ÖÖµ¼ÈëÀàÐÍ´ó¼Ò¸÷ÓÐËù°®£¬ÖÚ˵·×ç¡¡£ÕâÀï·ÖÎöÒ»ÏÂÕâÁ½ÖÖµ¼ÈëÀàÐ͵ĴóÖ¹¤×÷ÔÀí¹©´ó¼Ò²Î¿¼¡£
¡¡¡¡µ¥ÀàÐ͵¼Èë±È½ÏºÃÀí½â£¬½ö½öµ ......
ËãÊõÒì³£ÀࣺArithmeticExecption
¡¡¡¡¿ÕÖ¸ÕëÒì³£ÀࣺNullPointerException
¡¡¡¡ÀàÐÍÇ¿ÖÆ×ª»»Òì³££ºClassCastException
¡¡¡¡Êý×鸺ϱêÒì³££ºNegativeArrayException
¡¡¡¡Êý×éϱêÔ½½çÒì³££ºArrayIndexOutOfBoundsException
¡¡¡¡Î¥±³°²È«ÔÔòÒì³££ºSecturityException
¡¡¡¡ÎļþÒѽáÊøÒì³££ºEOFException
¡¡¡¡ÎļþÎ´Õ ......
JAVA±ÊÊÔÌ⾫»ª°æ1.0
public class Test2
{
public static void main(String[] args)
{
Float a = new Float(3.4);
&n ......
ºÜ¾µäµÄ¶«Î÷,±»×ªµÄµ½´¦¶¼ÊÇ, ÏÈдÔÎÄ:
µÚÒ»£¬Ì¸Ì¸final, finally, finalizeµÄÇø±ð¡£
¡¡final ÓÃÓÚÉùÃ÷ÊôÐÔ£¬·½·¨ºÍÀ࣬·Ö±ð±íʾÊôÐÔ²»¿É±ä£¬·½·¨²»¿É¸²¸Ç£¬À಻¿É¼Ì³Ð¡£finallyÊÇÒì³£´¦ÀíÓï¾ä½á¹¹µÄÒ»²¿·Ö£¬±íʾ×ÜÊÇÖ´ÐС£finalizeÊÇ ObjectÀàµÄÒ»¸ö·½·¨£¬ÔÚÀ¬»øÊÕ¼¯Æ÷Ö´ÐеÄʱºò»áµ÷Óñ»»ØÊÕ¶ÔÏóµÄ´Ë·½·¨£¬¿ÉÒÔ¸²¸Ç ......