É÷ÓÃJava×°ÏäÓë²ðÏä
ת×Ôhttp://xyiyy.javaeye.com/blog/358401
J2SE5.0ºóÌṩÁË×Ô¶¯×°ÏäÓë²ðÏäµÄ¹¦ÄÜ£¬´Ë¹¦ÄÜÊÂʵÉÏÊDZàÒëÆ÷À´°ïÄúµÄ棬±àÒëÆ÷ÔÚ±àÒëʱÆÚÒÀÄúËù±àдµÄ·½·¨£¬¾ö¶¨ÊÇ·ñ½øÐÐ×°Ïä»ò²ðÏ䶯×÷¡£ÀýÈ磺
Integer i = 100;
Ï൱ÓÚ±àÒëÆ÷ΪÄú×÷ÒÔϵÄÓï·¨±àÒ룺
Integer i = new Integer(100);
ËäÈ»´Ë¹¦Äܷܺ½±ã£¬µ«ÔÚ³ÌÐòÔËÐн׶ÎÄúµÃÁ˽âJavaµÄÓïÒå¡£ÈçÏÂÃæµÄ³ÌÐòÄܱàÒëͨ¹ý£º
Integer i = null;
int j = i;
´Ë³ÌÐò±àÒëʱͨ¹ý£¬µ«ÔËÐÐʱ»áÓдíÎó¡£ÒòΪÕâÖÖд·¨Ï൱ÓÚ£º
Integer i = null;
int j = i.intValue();
ÓÉÓÚiʵ¼ÊÉÏûÓвο¼ÖÁÈκεĶÔÏó£¬ËùÒÔ²»ÄܲÙ×÷intValue()·½·¨£¬ÉÏÃæ³ÌÐòÔËÐÐʱ»á³öÏÖNullPointerException´íÎó¡£
×Ô¶¯×°Ïä¡¢²ðÏäµÄ¹¦ÄÜÌṩÁË·½±ãÐÔ£¬µ«Òþ²ØÁËһϸ½Ú£¬ËùÒÔ±ØÐëСÐÄ¡£ÈçÏÂÁдúÂë1£º
public class AutoBoxDemo2
{
public static void main(String[] args)
{
Ïà¹ØÎĵµ£º
Java json lib
¸ù¾Ýhttp://www.javaeye.com/topic/561368̸µ½µÄÒ»¸öjacksonµÄjsonÐòÁл¯¹¤¾ßÐÔÄܱÈjson-libµÈÒªºÃ
ÎÞÂÛÊÇÔڵͲ¢·¢»¹ÊǸ߲¢·¢µÄÇé¿öÏ£¬Ê±¼äÐÔÄÜÉÏ£¬jacksonʹÓÃÖØÓÃObjectMapper·½Ê½´ó´óÓÅÓÚʹÓÃjson-lib·½Ê½£¬ÉõÓÚjacksonʹÓ÷ÇÖØÓÃObjectMapper·½Ê½Ò²ÂÔÓÅÓÚjson-lib·½Ê½¡£ÁíÍâÒ²¿ÉÒÔ¿´³ö£¬jacksonÔÚÖØÓà ......
java»·¾³Ïµ÷ÓÃVC++±àдµÄ¶¯Ì¬Á´½Ó¿âÎļþ
Ò»£¬¿ª·¢Æ½Ì¨£º
MyEclipse 6.0£¬VC++6.0
¶þ£¬JNI»ù´¡ÖªÊ¶£º
JNI(java native interface)£¬JAVA±¾µØ½Ó¿Úµ÷Óã¬Ä¿µÄÊÇΪÁËJAVA¿ÉÒÔµ÷Óñ¾µØ³ÌÐò¡£
Èý£¬½»»¥¹ý³Ì£º
1£¬½¨Á¢javaÀà¡£ÀýÈ磬½¨Á¢Ò»¸öRSA¼ÓÃܽâÃܵÄÀࣺ
package zkxx.ctais2.client.common;
public class RsaE ......
Hibernate
Hibernate
ÊÇÒ»¸öÓÅÐãµÄ³Ö¾Ã»¯¿ò¼Ü
˲ʱ״̬£¬³Ö¾Ã״̬
ORM
£º¶ÔÏó¹ØÏµÓ³É䣬Íê³É¶ÔÏóÊý¾Ýµ½¹ØÏµÊý¾ÝµÄÓ³Éä»úÖÆ
ʹÓÃ
Hibernate
µÄÈýÏî×¼±¸¹¤×÷ÊÇ£º
1¡¢
Ìí¼Ó
hibernate
¿â
......
Java³ÌÐòµ÷Óô洢¹ý³ÌÑéÖ¤Óû§µÇ¼
package com.yzy.jdbc.dao;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import oracle.jdbc.OracleTypes;
public class LoginDao {
public boolean loginValidate(String username, Stri ......
ʲôÊÇJavaÐéÄâ»ú
JavaÐéÄâ»ú£¨Java Virtual Machine) ¼ò³ÆJVM
¡¡¡¡JavaÐéÄâ»úÊÇÒ»¸öÏëÏóÖеĻúÆ÷,ÔÚʵ¼ÊµÄ¼ÆËã»úÉÏͨ¹ýÈí¼þÄ£ÄâÀ´ÊµÏÖ¡£JavaÐéÄâ»úÓÐ×Ô¼ºÏëÏóÖеÄÓ²¼þ,Èç´¦ÀíÆ÷¡¢¶ÑÕ»¡¢¼Ä´æÆ÷µÈ,»¹¾ßÓÐÏàÓ¦µÄÖ¸Áîϵͳ¡£
JavaÐéÄâ»úµÄÌØµã
¡¡¡¡JavaÓïÑÔµÄÒ»¸ö·Ç³£ÖØÒªµÄÌØµã¾ÍÊÇÓëÆ½Ì¨µÄÎÞ¹ØÐÔ¡£¶øÊ¹ÓÃJavaÐéÄâ»úÊÇÊµÏ ......