JAVA¸ß¼¶Èí¼þ¹¤³Ìʦ¾ÍÒµ°à
¿Î³ÌÄÚÈÝ
¸ü¼ÓʵÓÿÆÑ§µÄJava»ù´¡¿Î³Ì
¾ßÓÐÔúʵµÄ±àÂ빦µ×ÊÇÒ»¸öJava¹¤³Ìʦ±Ø±¸µÄÄÜÁ¦£¬ÎÒÃÇÁ¦Çó´ÓѧԱ½Ó´¥JavaµÄµÚÒ»ÌìÆð¾ÍÅàÑøÆäÐγÉÕýȷ˼¿¼ÎÊÌâµÄ·½Ê½¡£ÎÒÃǵĹØ×¢µã²»½ö½öÔÚÓÚ¶Ôij¸öÀà¿â£¨API£©µÄÕÆÎÕ£¬¸ü¶àµÄÊÇÏòѧԱչʾÆóÒµÖÐÕæÕýÒªÖØÊÓµÄÎÊÌ⣬ÀýÈçÒì³£ÈçºÎ´¦Àí¡¢Ëã·¨ÈçºÎÓÅ»¯µÈ¡£Í¬Ê±£¬ÎÒÃÇ×¢ÖØÈÃÑ§Ô±Ñø³ÉÁ¼ºÃµÄ±àÂëºÍÎĵµ×¢ÊÍϰ¹ß£¬±àд³öÆóÒµÈϿɵĴúÂë¡£
Ö÷ÒªÄÚÈݰüÀ¨£º
ÃæÏò¶ÔÏó³ÌÐòÉè¼Æ¡¢Java»ù´¡ºÍºËÐÄAPI£»Java¸ß¼¶ÌØÐÔ£¨¶àỊ̈߳¬·´É䣬¶¯Ì¬´úÀíµÈµÈ£©£»Éè¼ÆÄ£Ê½¼°ÆäÓ¦Óã»Linux²Ù×÷ϵͳµÈ¡£
Á÷ÐеÄÊý¾Ý¿â¿Î³Ì
¶ÔÓÚÆóÒµ¼¶Ó¦ÓÃϵͳ£¬Êý¾Ý¿âÖÁ¹ØÖØÒª£¬¿Î³ÌѡȡÁËÆóÒµ¼¶Êý¾Ý¿âOracleºÍ¹ã·ºÊ¹ÓõĿªÔ´Êý¾Ý¿âMySQL£¬ÖØµã¹Ø×¢Êý¾Ý¿âµÄÉè¼ÆºÍÊý¾ÝµÄ·ÃÎʼ¼ÇÉ¡£
Ö÷ÒªÄÚÈݰüÀ¨£º
OracleÊý¾Ý¿â»ù´¡£»Êý¾Ý¿âÉè¼Æ£»PL/SQL¸ß¼¶±à³Ì£»OracleÊý¾Ý·ÃÎÊÓÅ»¯£»MySQLÊý¾Ý¿â»ù´¡µÈ¡£
¸ü¾ßʵÓüÛÖµµÄ»ùÓÚB/SϵͳµÄ¿Î³ÌÌåϵ
»ùÓÚä¯ÀÀÆ÷µÄB/SÌåϵ½á¹¹£¬ÊÇĿǰÆóҵϵͳÖг£ÓÃÇÒ³ÉÊìµÄÌåϵ½á¹¹£¬ÊÇÎÒÃÇÏîĿʵսÖÐËù¹Ø×¢µÄÖØµã¡£
AJAX(Asynchronous Java script and XML)ÊǶàÖÖ¼¼ÊõµÄ×ۺϣ¬ÔÚĿǰµÄWeb2.0Èȳ±Öеõ½Á˹㷺µÄÓ¦Óá£ÔÚÎÒÃǵĿγÌÌåϵÖн«½²ÊöÈçºÎʹÓÃAJAX¹¹½¨¸üΪ¶¯Ì¬£¬²¢ÇÒÏìÓ¦¸üÁéÃôµÄWebÓ¦ÓóÌÐò¡£
Ö÷ÒªÄÚÈݰüÀ¨£º
JDBC£»JSP/Servlet£»Tomcat·þÎñÆ÷»ù´¡£»Tomcat¸ß¼¶ÅäÖã»Java script ¸ß¼¶±à³Ì£»AJAXºËÐÄÄÚÈÝ£»AJAX³£Óÿò¼Ü¼°±êÇ©¿âµÈ¡£
J2EEÇáÁ¿¼¶½â¾ö·½°¸
Struts¡¢Spring¡¢HibernateÊÇÒµÄÚ¶¦¶¦´óÃûµÄ¿ªÔ´¿ò¼Ü¡£µ«ÎÒÃǹØ×¢µÄ²»½ö½öÊÇ֪ʶ±¾Éí£¬ ¸üÊÇÓ¦¸Ã×ñѵĹý³Ì£º“ÆóÒµÏîÄ¿ÖгöÏÖÁËʲôÎÊÌâ”→“ÕâЩ¿ò¼Ü½â¾öÕâЩÎÊÌâµÄ²ßÂÔÊÇʲô”→“ÈçºÎÀûÓÃÕâЩ¿ò¼ÜÊìÁ·µØ½â¾öÎÊÌâ”→“ÕâЩ¿ò¼Ü»áÓÐÄÄЩ±×¶ËºÍ²»×㣬ÔÚʵ¼ùÏîÄ¿ÖÐÈçºÎÈ¥ÓÅ»¯ºÍÀ©Õ¹”¡£
Ö÷ÒªÄÚÈݰüÀ¨£º
Struts£»Spring£»HibernateµÈ¡£
Java EEºËÐļ¼Êõ£¨¼ÓÈëEJB 3.0£©
Java EEºËÐÄ·þÎñJNDI¡¢RMI¡¢JMS¡¢JTAµÈÊDZȽϳÉÊìµÄ¼¼Êõ£¬ÊÇÆóÒµ¼¶ÏîÄ¿µÄ»ù´¡£¬ÊÇÎÒÃÇÐèÒªÖØµã¹Ø×¢µÄ»°Ìâ¡£ EJB 3.0µÄ·¢²¼¸øEJB´øÀ´ÁËеĻîÁ¦£¬ÎÒÃÇÒªÁì»áÆäºËÐÄ£¬°ÑÎÕ¼¼Êõ·¢Õ¹µÄÂöÂç¡£
Ö÷ÒªÄÚÈݰüÀ¨£º
Java EEºËÐÄ·þÎñ£¨JNDI¡¢JTA¡¢JMS£©£»Java EEºËÐÄÉè¼ÆÄ£Ê½£»EJB£¨°üÀ¨EJB 3.0£©µÈ¡£
¼«ÏÞ±à³Ì·½·¨£¨XP£©¡¢ÊµÓÃµÄÆóÒµ¿ª·¢»·¾³
¼«ÏÞ±à³Ì£¨XP£©£¬ÕâÒ»¾¹ýʵ¼ù¿¼ÑéµÄÈí¼þ¿ª·¢·½·¨£¬ÒѾ±»Ðí¶à´óÐÍ¿ª·¢ÍŶӳɹ
Ïà¹ØÎĵµ£º
javaÖеÄʼþ»úÖÆµÄ²ÎÓëÕßÓÐ3ÖÖ½ÇÉ«£º
1.event object£º¾ÍÊÇʼþ²úÉúʱ¾ßÌåµÄ“ʼþ”£¬ÓÃÓÚlistenerµÄÏàÓ¦µÄ·½·¨Ö®ÖУ¬×÷Ϊ²ÎÊý£¬Ò»°ã´æÔÚÓëlisternerµÄ·½·¨Ö®ÖÐ
2.event source£º¾ßÌåµÄ½ÓÊÜʼþµÄʵÌ壬±ÈÈç˵£¬Äãµã»÷Ò»¸öbutton£¬ÄÇôbutton¾ÍÊÇevent source£¬ÕâÑùÄã±ØÐëʹbutton¶ÔijЩʼþ½øÐÐÏàÓ¦£¬Äã¾ÍÐè ......
½üÀ´ÔÚ×öJAVAʱÓõ½ÎļþµÄѹËõÓë½âѹ,ÆäÖÐÅöµ½Á˸öÎÊÌâ:ÏÈÓÃJAVA´úÂë´ò°üºÃµÄJARÎļþ¾¹ýC#µÄzlib´¦Àíºó,¾¹È»²»ÄÜÐÞ¸Ä!
ÍøÉÏÕÒÁ˺ÃЩ´úÂë¶¼²»¿ÉÐÐ,JAVA´´½¨µÄJAR°üÔÚÐ޸ĵÄʱºò¿ÉÒÔ·¢ÏÖ¿ªÊ¼Óиö·¾¶·û'/'»ò'\',ËäÈ»ÔÚ´Ë¿ÉÒÔÐÞ¸ÄJARÎļþ,µ«ÊÇ×ܾõµÃÒþ»¼³öÔÚÕâ,ºóÀ´µÄÊÂÊ ......
ÎÊÌâÃèÊö
Exception in thread "main" java.lang.OutOfMemoryError:
Java heap space
½â¾ö·½°¸[ת]
Ò»Ö±¶¼ÖªµÀ¿ÉÒÔÉèÖÃjvm heap´óС£¬Ò»Ö±ÓÃeclipseд/µ÷ÊÔjava³ÌÐò¡£Ò»Ö±ÓÃÃüÁîÐÐor
console¼Ó²ÎÊýÅܳÌÐò¡£ÏÖÏó£ºÔÚeclipseµÄÅäÖÃÎļþeclipse.iniÖÐÉèÖÃ-vmargs -Xms500m
-Xmx1024m
£¬ÔÚeclipseÖ ......
/*Decryptor*/
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
/**
* Decrypt the password get form Xpress GUI
*/
public class Decryptor{
//¼ÓÃÜ
  ......
// ´´½¨Excel
String destFileName = tableName + ".xls";//ÎļþÃû
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment; filename=".concat(String .valueOf(destFileNa ......