Java Òì³£´¦Àí
Java Òì³££¨ Exception£©·ÖΪÊÜ¿ØÒì³£ºÍ²»ÊÜ¿ØÒì³£Á½ÖÖ¡£ÆäÖÐÊÜ¿ØÒì³£±ØÐëÇ¿ÖÆÖ´Ðв¶»ñ»òÕßÉùÃ÷£¬·ñÔò½«³öÏÖ±àÒë´íÎó¡£ ¶ÔÓÚ·ÇÊÜ
¿ØÒì³£java±àÒëÆ÷²»»á¼ì²é´úÂëÒÔÈ·¶¨ÊDz¶»ñ»òÕßÉùÃ÷²»ÊÜ¿ØÒì³£¡£¾¡¹Ü±àÒëÆ÷¶Ô²»ÊÜ¿ØÒ쳣ûÓв¶»ñ»òÕßÉùÃ÷µÄÇ¿ÖÆÒªÇ󣬵«ÖªµÀ·¢ÉúÕâÖÖÒ쳣ʱӦÌṩºÏÊʵÄÒì³£´¦Àí´úÂë¡£
ThrowableÀà¼Ì³Ð×ÔobjectÀà¡£
1.ThrowableÒÔϵÄÒì³£¶¼¿ÉÒÔ±»²¶»ñ
2.ËùÓÐErrorÀ༰Æä×ÓÀà´ú±íjavaÔËÐÐʱϵͳÖпÉÄÜ·¢ÉúµÄÒì³£Çé¿ö£¬ÊÇÖÂÃüµÄ£¬¼´³ÌÐòÓöµ½Á˷dz£ÑÏÖØµÄ²»Õý³£×´Ì¬£¬²»Äܼòµ¥»Ö¸´Ö´ÐУ¬Õâ¾ÍÊÇ´íÎó¡£È磺ÄÚ´æºÄ¾¡¡¢ÏµÍ³ÄÚ²¿´íÎóµÈ£¬Í¨³£ÎÒÃÇ£¨Ó¦ÓóÌÐò£©²»Ó¦²¶»ñÕâЩÒì³£¡£
3.ËùÓÐExceptionÀ༰Æä×ÓÀà´ú±íjava³ÌÐòÖпÉÄÜ·¢ÉúµÄÒì³£Çé¿ö£¬ÊÇ·ÇÖÂÃüµÄ£¬Í¨¹ýijÖÖÐÞÕýºó³ÌÐò»¹ÄܼÌÐøÖ´ÐС£ÕâÀà´íÎó½Ð×÷Òì³£¡£È磺Îļþ²»´æÔÚ¡¢ÎÞЧµÄϱꡢ¿ÕÒýÓá¢ÍøÂç¶Ï¿ª¡¢´òÓ¡»úÍÑ»ú¡¢´ÅÅÌÂúÁ˵ȣ¬Í¨³£ÎÒÃÇ£¨Ó¦ÓóÌÐò£©¿ÉÒÔ²¶»ñÕâЩÒì³£¡£
§
Òì³£´¦Àí½á¹¹¿É·ÖΪ£ºtry-catch½á¹¹£¬try-catch-finally½á¹¹ £¬ try-finally½á¹¹ ¡£
§
§
try-catch½á¹¹
§try{
§ //¿ÉÄܲúÉúÒì³£µÄ´úÂë
§ }
§catch(someException e){
§ //´¦ÀíÒì³£µÄ´úÂë
§ }
§catch(someException e){
§ //´¦ÀíÒì³£µÄ´úÂë
§ }
try-catch-finally½á¹¹
§ try{
§ //¿ÉÄܲúÉúÒì³£µÄ´úÂë
§ }catch(someException e){
§ //´¦ÀíÒì³£µÄ´úÂë
§ } finally{
§ //±ØÐëÖ´ÐеĴúÂë
§ }
try-finally½á¹¹
§ try{
§ //¿ÉÄܲúÉúÒì³£µÄ´úÂë
§ }finally{
§ //±ØÐëÖ´ÐеĴúÂë
§ }
Ïà¹ØÎĵµ£º
Javaѧϰ´ÓÈëÃŵ½¾«Í¨
Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......
ÎÒÏÖÔÚÊÇÈí¼þѧԺ´ó¶þµÄѧÉú£¬ÎÒÃÇѧµÄ½Ì²ÄÊÇ¡¶JavaÓïÑÔ³ÌÐòÉè¼Æ¡·£¬ÏÖÔÚѧµÄÊǽø½×ƪ£¬¿ÉÊÇÎҸоõºÃÏñ»¹ÊÇʲô¶¼²»»á°¡£¡Èç¹ûÕæ¸øÎÒÒ»¸öÌâÄ¿ÈÃÎÒ×Ô¼ºÈ¥×ö£¬ÎÒÏëÎÒ»á×ö²»³öÀ´¡£²»¹ýÈç¹û¿´×ÅÊéȥʵÏÖÒ»¸ö¹¦ÄÜÎÒ»¹ÒªÏëºÜ¾Ã²Å»á×ö³öÀ´£¬Ò²ÐíÊÇÎÒѧϰ»¹²»¹ýÈÏÕæ£¬×Ô¼º¶¯ÊÖµÄÄÜÁ¦»¹Ã»ÓÐÑø³É£¬Ò²ÐíÊÇÎÒ´ ......
package com.yc.eap.util;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.apache.common ......
½á¹¹Ä£Ê½£¨££©
Adapter(ÊÊÅäÆ÷)
½«Ò»¸öÀàµÄ½Ó¿Úת»»³É¿Í»§Ï£ÍûµÄÁíÍâÒ»¸ö½Ó¿Ú¡£AdapterģʽʹµÃÔ±¾ÓÉÓÚ½Ó¿Ú²»¼æÈݶø²»ÄÜÒ»Æð¹¤×÷µÄÄÇЩÀà¿ÉÒÔÒ»Æð¹¤×÷¡£
Adapter·ÖΪ2ÖÖ:
ÀàÊÊÅäÆ÷ºÍ¶ÔÏóÊÊÅäÆ÷¡£AdapterºÍAdapteeÖ®¼äÊÇis-a¹ØÏµµÄʱºò£¬ÊôÓÚÀàÊÊÅäÆ÷£¬AdapterºÍAdapteeÖ®¼äÊÇhas-a¹ØÏµµÄʱºò£¬ÊôÓÚ¶ÔÏóÊÊÅäÆ÷¡£ ......