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

[ת]JavaÁ¬½ÓSQLite dbÊý¾Ý¿âÎļþ

JavaÁ¬½ÓSQLiteÊý¾Ý¿âÏê½â ÏÂÔØSQLiteÊý¾Ý¿âµÄJDBC ÕâÀï¸ø³öÒ»¸öÖÐÎÄÕ¾µãµÄURL: ÉèÖû·¾³±äÁ¿£º ½«ÏÂÔØµ½µÄ°ü½âѹºóµÃµ½jar°ü sqlitejdbc-v033-nested.jar ·Åµ½%JAVA_HOME%\lib Ï£¬²¢ÇÒ½«ÆäÌí¼Óµ½classpathϵͳ»·¾³±äÁ¿ÖÐ,ÎÒµÄclasspathϵͳ»·¾³±äÁ¿ÏÖÔÚΪ: .;%JAVA_HOME%\lib;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;%JAVA_HOME%\lib\sqlitejdbc-v033-nested.jar
3 ÔÚÄãµÄ´úÂëÖÐÒýÓÃÕâ¸öÇý¶¯:
Class.forName("org.sqlite.JDBC");
Connection conn = DriverManager.getConnection("jdbc:sqlite:filename");//filenameΪÄãµÄSQLiteÊý¾ÝÃû³Æ
// ... use the database ...
conn.close();
ʾÀý³ÌÐòÈçÏ£º
import java.sql.*;
import org.sqlite.JDBC;
/**
* ÕâÊǸö·Ç³£¼òµ¥µÄSQLiteµÄJava³ÌÐò,
* ³ÌÐòÖд´½¨Êý¾Ý¿â¡¢´´½¨±í¡¢È»ºó²åÈëÊý¾Ý£¬
* ×îºó¶Á³öÊý¾ÝÏÔʾ³öÀ´
* @author zieckey (http://zieckey.cublog.cn)
*/
public class TestSQLite
{
public static void main(String[] args)
{
try
{
//Á¬½ÓSQLiteµÄJDBC
 
Class.forName("org.sqlite.JDBC");

//½¨Á¢Ò»¸öÊý¾Ý¿âÃûzieckey.dbµÄÁ¬½Ó£¬Èç¹û²»´æÔÚ¾ÍÔÚµ±Ç°Ä¿Â¼Ï´´½¨Ö®
 
Connection conn = DriverManager.getConnection("jdbc:sqlite:zieckey.db");

Statement stat = conn.createStatement();

stat.executeUpdate( "create table tbl1(name varchar(20), salary int);" );//´´½¨Ò»¸ö±í£¬Á½ÁÐ
 

stat.executeUpdate( "insert into tbl1 values('ZhangSan',8000);" ); //²åÈëÊý¾Ý
 
stat.executeUpdate( "insert into tbl1 values('LiSi',7800);" );
stat.executeUpdate( "insert into tbl1 values('WangWu',5800);" );
stat.executeUpdate( "insert into tbl1 values('ZhaoLiu',9100);" );
 
ResultSet rs = stat.executeQuery("select * from tbl1;"); //²éѯÊý¾Ý
 
while (rs.next()) { //½«²éѯµ½µÄÊý¾Ý´òÓ¡³öÀ´
 
System.out.print("name = " + rs.getString("name") + " "); //ÁÐÊôÐÔÒ»
 
System.out.println("salary = " + rs.getString("salary


Ïà¹ØÎĵµ£º

java×ÔѧµãµÎ


String Óë StringBufferÇø±ð:
String×Ö·û´®¶ÔÏóÊDz»¿É±äµÄ£»StringBufferÊDZ䳤ºÍ¿ÉдµÄ¶¯Ì¬×Ö·ûÐòÁУ¬¿ÉÒÔ×Ô¶¯µØÔö¼Ó¿Õ¼ä¡£
Integer var = new Integer();//ÓÐÓï·¨´íÎó
Integer var = new Integer(2);//悦﵀
javaµÄVector³ÉÔ±ÊÇÒªÓÃelementAt(i)³ÉÔ±º¯ÊýÀ´»ñµÃµÄ£¬²»ÄÜÓÃve[i]µÃµ½¡£
Vector::public Enumeration& ......

Java»ù±¾Óï·¨

 finalize·½·¨
ËüÊÇjava.lang.ObjectÀàÖеķ½·¨. ÊÇprotectedµÄ.
ȱʡʱÕâ¸ö·½·¨ÊǿյÄ. JavaÔËÐÐϵͳÔÚÀ¬»ø»ØÊÕʱÔÚ¶ÔÏó±»³·Ïú֮ǰµ÷ÓÃÕâ¸ö·½·¨. µ«ÓÉÓÚÀ¬»øµ¥Ôª
»ØÊÕµÄʱ¼äÊDz»È·¶¨µÄ.ËùÒÔ²»Äܹý·ÖÒÀÀµËü(ÕâºÍc++µÄÎö¹¹º¯Êý²»Í¬). 
¶øÖ»ÄÜÊÇ"ÔÚ¶ÔÏó±»³·Ïú֮ǰ"×öһЩ´¦Àí.ÀýÈç¿ÉÒÔÔÚÕâÀï¹Ø±Õ¹¹Ôì·½·¨Öдò¿ ......

JAVA¼¯ºÏ

Vector : »ùÓÚArrayµÄList£¬Æäʵ¾ÍÊÇ·â×°ÁËArrayËù²»¾ß±¸µÄһЩ¹¦ÄÜ·½±ãÎÒÃÇʹÓã¬Ëü²»¿ÉÄÜ×ßÈëArrayµÄÏÞÖÆ¡£ÐÔÄÜÒ²¾Í²»¿ÉÄÜ
³¬Ô½Array¡£ËùÒÔ£¬ÔÚ¿ÉÄܵÄÇé¿öÏ£¬ÎÒÃÇÒª¶àÔËÓÃArray¡£ÁíÍâºÜÖØÒªµÄÒ»µã¾ÍÊÇVector“sychronized”µÄ£¬Õâ¸öÒ²ÊÇVectorºÍ
ArrayListµÄΨһµÄÇø±ð¡£
ArrayList£ºÍ¬VectorÒ»ÑùÊÇÒ»¸ö»ùÓ ......

Java±à³Ì¹æ·¶

 packageµÄÃüÃû package µÄÃû×ÖÓÉÈ«²¿Ð¡Ð´µÄ×Öĸ×é³É£¬ÀýÈ磺cn.mybole¡£
classºÍinterfaceµÄÃüÃû classºÍinterfaceµÄÃû×ÖÓÉ´óд×Öĸ¿ªÍ·¶øÆäËû×Öĸ¶¼Ð¡Ð´µÄµ¥´Ê×é³É£¬ÀýÈ磺Person£¬RuntimeException¡£
class±äÁ¿µÄÃüÃû ±äÁ¿µÄÃû×ÖÓÃÒ»¸öСд×Öĸ¿ªÍ·£¬ºóÃæµÄµ¥´ÊÓôóд×Öĸ¿ªÍ·,ÀýÈ磺index£¬currentImage¡£
clas ......

javaÀàÐÍѧϰ


Ò»¸öjavaÎļþÖУ¬ÓÐÇÒÖ»ÓÐÒ»¸öpublicÀà
float ff= 1.3f;(4B)
int 4B;
long 8B;
double 8B;
byte Ò»×Ö½ÚÕûÐÍ
char 2B
Êý×é
int num[] = new int[3];
int[] num;
num = new int[3];
int [] num = new int[]{1,2,3};
int [][] num;
num = new int[3][4];
//²»Í¬³¤
num = new int[3][];
num[0] = new int[5]; ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ