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

JAVAµ÷ÓÃMYSQL´æ´¢¹ý³Ì

JAVAµ÷ÓÃMYSQL´æ´¢¹ý³Ì
¹¤³ÌÊÓͼ£º
´úÂëÇåµ¥£º
myconn.java
package org.apache.sh_mysql.test;
import java.sql.*;
public class MyConn {

private static final String DRIVER = "com.mysql.jdbc.Driver";
private static final String URL = "jdbc:mysql://localhost/test?useUnicode=true&characterEncoding=GBK";
private static final String USER = "root";
private static final String PASSWORD ="root";
static {
try {
Class.forName(DRIVER);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* »ñÈ¡Á¬½Ó
*
* @return
* @throws Exception
*/
public Connection getConnection() throws Exception {
return DriverManager.getConnection(URL, USER, PASSWORD);
}
/**
* ÊÍ·Å×ÊÔ´
*
* @param rs
* @param statement
* @param conn
*/
public void close(ResultSet rs, CallableStatement stmt, Connection conn) {
try{
if (rs != null) {
rs.close();
}
if (stmt != null) {
stmt.close();
}
if (conn != null) {
conn.close();
}
}catch(Exception e){
e.printStackTrace();
}
}
}

´úÂëÇåµ¥£º
mytest.java
package org.apache.sh_mysql.test;
import java.sql.*;
public class MyTest {
MyConn c=new MyConn();

public void handleData() {
try {
Connection conn=c.getConnection();
CallableStatement call=conn.prepareCall("{call pro_stu_count(?)}");
call.registerOutParameter(1, Types.INTEGER);
call.execute();
int count=call.getInt(1);
System.out.println(count);

} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
public static void main(String[] args) {
MyTest t=new MyTest();
t.handleData();

}
}


Ïà¹ØÎĵµ£º

Java theory and practice

1. Multiply-Thread
Locks offer two primary features: mutual exclusion and visibility. Mutual exclusion means only one thread at a time may hold a given lock, so only one thread at a time will be using the shared data. Visibility is to ensure that changes made to shared data prior to releasing a lo ......

JAVA NIO TCP SOCKET ÁÄÌìȺ·¢

ÒÔǰ¶¼ÊÇÓÃÒ»°ãµÄsocket±à³Ì£¬ÓÃÏß³ÌÀ´¿ØÖÆ¡£×î½üͻȻÓÃnioÀ´×öЩ¶«Î÷¡£
nioµÄºÃ´¦ÎÒÀ´ËµÒ»Ï£ºµÚÒ»£¬¶Áд¶¼ÊÇ»ùÓÚ¿éµÄ£¬Ð§Âʸߡ£µÚ¶þ£¬Í¨¹ýÒýÈëselector,¼ò»¯ÁËÍøÂç±à³ÌÄ£ÐÍ£¬Òì²½·Ç×èÈû¡£
¼ÈÈ»ÓÐÕâô¶àºÃ´¦£¬ÄǾÍд¸öNIO TCPÍøÂçÁÄÌìÊÒÀ´Á·Á·ÊÖ°É¡£
ÒòΪûÓÐдgui£¬ÊÇ»ùÓÚ¿ØÖÆÌ¨µÄËùÒÔûд˽Á˵IJ¿·Ö£¬Ö»Ð´Á˹«¹²ÁÄÌìÊ ......

JAVA NIO TCP SOCKET ÁÄÌìȺ·¢(²¢·¢¶àÏß³ÌдÏûϢƪ)

·þÎñÆ÷ÖÐתÏûÏ¢£¬ÊÇ·ÑʱµÄÊ£¬¿ÉÒÔ¼ÓÈë¶àÏ̡߳£ÕâÑùÒÔÀ´£¬»á²úÉúºÜ¶àÏ̡߳£¿ÉÒÔÔËÓÃÏ̳߳ØÀ´¹ÜÀí¡£
ÕâÀïÔËÓÃjava.util.concurrent°üµÄExecutors.newCachedThreadPoolÀ´¹ÜÀí¡£
·Ï»°ÉÙ˵£¬ÉÏ´úÂ룺
·þÎñÆ÷¶Ë£ºMySocketServer.java
/*
 * To change this template, choose Tools | Templates
 * and open the ......

Java JDBCÖ±Á¬

public class www {
public static void main(String[]args) throws Exception {
//µÚÒ»²½£º¼ÓÔØÇý¶¯£¨Çý¶¯jar°ü±ØÐë¼ÓÈëclasspathÖУ©
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
//µÚ¶þ²½£º½¨Á¢Á¬½Ó£¨¸ù¾Ýʵ¼ÊÇé¿öÌæ»»Êý¾Ý¿âµÄÖ÷»úµØÖ·¡¢¶Ë¿ÚºÅ¡¢Êý¾Ý¿âÃ÷¡¢µÇ¼à ......

javaºÍc#µÄËø

ÒªÔÚJavaÖлñµÃijһ±äÁ¿µÄËø£¬±ØÐëÔÚ´úÂëµÄÊ×β¶þ¶Ë¼ÓÉÏsynchronized¹Ø½¡×Ö£¬Ö¸Ã÷ÐèÒª»ñµÃËøµÄ¶ÔÏó¡£Ò»µ©Ï߳̿ªÊ¼Ö´ÐÐsynchronized¿éÖеĴúÂ룬Ëü¾Í»ñµÃÁ˶ÔÕâÒ»¶ÔÏóµÄËøµÄ¿ØÖÆÈ¨¡£Í¬Ñù£¬Ò»µ©Ïß³ÌÒѾ­À뿪ÁËsynchronized¿é£¬ËüÒ²½«ÊÍ·ÅÕâÒ»¶ÔÏóµÄËø¡£ÎÒÃÇÒѾ­ÖªµÀ£¬C#Ò²ÓÐÒ»¸öÏàËÆµÄ±»³Æ×÷lockµÄ¹Ø½¡×Ö¡£³ýÁËlockÕâ¸ö¹Ø½¡×Ö ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ