Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

javaµ÷Óô洢¹ý³Ì

//µ÷Óô洢¹ý³Ì´ø²Î
            CallableStatement ca = conn.prepareCall("{call Login (?,?)}");
            ca.setString(1,username);
            ca.setString(2,password);
            ca.execute();
//µ÷Óô洢¹ý³Ì´ø·µ»Ø²ÎÊýµÄ
            CallableStatement ca = conn.prepareCall("{call Login (?,?,?)}");
            ca.setString(1,username);
            ca.setString(2,password);
            ca.registerOutParameter(3,java.sql.Types.INTEGER);
            ca.execute();
            int returnOut = ca.getInt(3);
 //µ÷Óô洢¹ý³Ì´ø·µ»ØÖµµÄreturn
            CallableStatement ca = conn.prepareCall("{?=call Login (?,?,?)}");
            ca.setString(2,username);
            ca.setString(3,password);
            ca.registerOutParameter(1,java.sql.Types.INTEGER);
            ca.execute();
            int returnOut = ca.getInt(1);
    //µ÷Óô洢¹ý³Ì·µ»ØÁ½¸ö½á¹û¼¯
            CallableStatement ca = conn.prepareCall("{call Login (?,?,?)}");
            ca.setString(1,usern


Ïà¹ØÎĵµ£º

Java Reflection (JAVA·´Éä)

Reflection ÊÇ Java ³ÌÐò¿ª·¢ÓïÑÔµÄÌØÕ÷Ö®Ò»£¬ËüÔÊÐíÔËÐÐÖÐµÄ Java ³ÌÐò¶Ô×ÔÉí½øÐмì²é£¬»òÕß˵“×ÔÉ󔣬²¢ÄÜÖ±½Ó²Ù×÷³ÌÐòµÄÄÚ²¿ÊôÐÔ¡£ÀýÈ磬ʹÓÃËüÄÜ»ñµÃ Java ÀàÖи÷³ÉÔ±µÄÃû³Æ²¢ÏÔʾ³öÀ´¡£
Java µÄÕâÒ»ÄÜÁ¦ÔÚʵ¼ÊÓ¦ÓÃÖÐÒ²ÐíÓõò»ÊǺܶ࣬µ«ÊÇÔÚÆäËüµÄ³ÌÐòÉè¼ÆÓïÑÔÖиù±¾¾Í²»´æÔÚÕâÒ»ÌØÐÔ¡£ÀýÈ磬Pascal¡¢C ......

JavaÖеķºÐÍ

    1¡¢Java.utilµÄ¼¯ºÏÀàÖеÄÔªËØ±ØÐëÊǶÔÏ󻯵ģ¬ËûÃDz»ÄÜÊÇ»ù±¾ÀàÐÍ¡£Èç²»ÄÜÉùÃ÷Set<char>»òList<int>¡£µ«¶ÔList<Integer>£¬¿ÉÒÔÍùÀïÃæ¼ÓintÐÍÊý¾Ý£¬Ëü»áÓÃJavaµÄautoboxing»úÖÆ×Ô¶¯×ª»»³ÉInteger¶ÔÏó¡£
    2¡¢²ÎÊý»¯ÀàÖеÄÀàÐͲÎÊý¿ÉÒÔÊÇÊý×éÀàÐÍ£¬ÈçMap< ......

JavaÁ¬½ÓmysqlÊý¾Ý¿â

Ê×ÏÈ£¬´ò¿ªMySQL Query Browser£¬ÔÚµ±Ç°TestÊý¾Ý¿âÏ£¬Ð½¨Ò»¸östudent±í£¬ÓÐÈçÏÂÊôÐÔ£º
create table student (name varchar(10),id int(2),sex varchar(10));
 
³ÌÐò¼ûÏ£º
package com.JDBC;
import java.sql.*;
public class JDBCTest {
public static void main(String[] args) {String driver = "com.mys ......

javaÀàÐÍת»»×ܽá

ÀàÐÍת»»×ܽ᣺
1.Ô­ÐÍÊý¾Ýbyte,short,int,long,float,double,char,boolean,СÀàÐÍÊý¾Ý¿ÉÒÔÖ±½Ó¸³¸ø´óÀàÐÍÊý¾ÝÀýÈç
 int a=1;byte b=2;short c=3;float d=3;double e=4;char f='a';boolean g=true;long l=10;
c=b;
a=f;
d=a;
e=d;
byteÐÍÊý¾Ý²»ÄÜÖ±½Ó¸³¸øcharÐÍÊý¾Ý£¬ÒòΪbyte±íʾµÄÊÇ8λÓзûºÅÊý£¬¶øchar±íʾµ ......

java ±È½ÏÆ÷µÄʹÓÃ

¶ÔÓÚÒ»¸öʵÏÖÁËComparable½Ó¿ÚµÄ¶ÔÏ󣬸ýӿÚÖ»ÄÜʵÏÖÒ»´Î¡£Èç¹ûÔÚÒ»¸ö¼¯ºÏÀïÃæÐèҪʹÓÃidÅÅÐò£¬¶øÔÚÁíÍâÒ»¸ö¼¯ºÏÀïÐèÒª°´Ãû×ÖÅÅÐòÕâʱ¾ÍÐèÒªÔÚÕâ¸ö¼¯ºÏÀïÃæÖ¸¶¨±È½ÏÆ÷¡£
Comparable½Ó¿ÚÉùÃ÷ÁËcompareTo(Object o)·½·¨
Comparator ½Ó¿ÚÉùÃ÷ÁËcompare(Object o1,Object o2)·½·¨
eg:
µÚÒ»¸öÊ÷¼¯Êǰ´ÕÕ¶ÔÏóĬÈϵÄidÅÅÐò£¬µ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ