java¶ÁÐ´ËøÊµÏÖ»úÖÆ
package thread.lock;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
/**
* @file_name ReadAndWriteLockDemo.java
* @description ¶ÁÐ´ËøDEMO
* @author ÕÅÃ÷ÁÁ
* @date 2009.09.27
*/
public class ReadAndWriteLockDemo {
ReentrantReadWriteLock rwLock = new ReentrantReadWriteLock();
// ¶ÁËø
Lock rLock = rwLock.readLock();
// Ð´Ëø
Lock wLock = rwLock.writeLock();
// »õ¼Ü
List<String> stock = new ArrayList<String>();
//»¥³âËø
ReentrantLock lock = new ReentrantLock();
/**
* ÉÌÆ·ÂòÂô
* <br>
* µ±ÉÌÆ·ÊýÁ¿Ð¡ÓÚ1ʱ£¬ÊͷŶÁËø²¢»ñÈ¡Ð´Ëø Éú²úÉÌÆ·ºó£¬
* <br>
* Ëø½µ¼¶ÔÚÐ´Ëø±£»¤ÏÂÖØÐ»ñÈ¡¶ÁËø²¢Ïû·ÑÉÌÆ·
*/
public void sell() {
// lock.lock();
try {
rLock.lock();
if (stock.size() <= 0) {
rLock.unlock();
wLock.lock();
manufacture();
rLock.lock();
wLock.unlock();
}
consume();
rLock.unlock();
} finally {
// lock.unlock();
}
}
/**
* Éú²úÉÌÆ·
*/
private void manufacture() {
stock.add("product");
}
/**
* Ïû·ÑÉÌÆ·
*/
private void consume() {
System.err.println(stock.remove(0));
}
public static void main(String[] args) {
final ReadAndWriteLockDemo rwDemo = new ReadAndWriteLockDemo();
rwDemo.sell();
// Thread t1 = new Thread("threa--1") {
// public void run() {
// rwDemo.sell(
Ïà¹ØÎĵµ£º
InputSteam,OutputStream:¶Ô×ֽڵIJÙ×÷
Reader,Writer:¶Ô×Ö·ûµÄ²Ù×÷
InputStreamReader,OutputStreamReader:×Ö½Ú->×Ö·ûµÄת»»,×Ö·û->×Ö½ÚµÄת»»
FilterInputSteam,FilterOutputStream:¹ýÂË×Ö½ÚÊäÈëÁ÷(Êä³öÁ÷)µÄ³¬Àà
FilterReader,FilterWriter:¹ýÂË×Ö·ûÊäÈëÁ÷(Êä³öÁ÷)µÄ³¬Àà
BufferedInputStream,BufferedOutp ......
1.µÃµ½µ±Ç°µÄʱ¼ä
Calendar cal = Calendar.getInstance();
String time=formatter.format(cal.getTime());
String strEnd=time.substring(0, 16);// 2007-10-30 09:30
Calendar cal = Calendar.getInstance();
String time=formatter.format(cal.getTime());
String strEnd=time.subst ......
¶ÔÓÚÔÓïÀàÐ͵ÄÊý×飬Èçint[] a,ÔÚCÀïÃæÖ»ÒªÕâÑù¶¨ÒåÖ®ºó¾Í¿ÉÒÔÓÃa[i]ʹÓÃÁË£¬µ«ÊÇÔÚJAVAÀïÃæÊDz»Ðе쬱ØÐëÓÃint[] a = new int[LENGTH];À´ÎªÊý×é·ÖÅä¿Õ¼ä¡£ÕâÀïµÄa¸üÓ¦¸Ã¿´³ÉCÀïÃæµÄÖ¸Õ룬ËüºÍCÀïÃæµÄint* aÊÇÒ»ÑùµÄ£¬ÒòΪÕâ¸öa£¨CÀïÃæµÄ£©Ò²ÒªÏÈmallocÒ»¸ö¿Õ¼äÖ®ºó²Å¿ ......
String keyword = request.getParameter("keyword");
String timeRange = request.getParameter("timeRange");
String type = request.getParameter("type");
StringBuffer sql = new StringBuffer();
sql.append("use webstation_leadall s ......
½ñÌì¸ø´ó¼Ò·ÖÏíÒ»ÏÂÈçºÎ±¸·ÝºÍ»Ø¸´sql server Êý¾Ý£¬
Ê×ÏÈÈ·±£Äã¾ßÓÐDBµÄ×î¸ßȨÏÞ
ÔÚJAVA´úÂëÖÐ Äã¿ÉÒÔÕâÑùдpublic class Opp extends TestCase{
public void test1()
{
try
{
Connection con = DBUtils.getConn();
String sql="backup database tdzl to disk='d:\\tdzl.bak'";
Statement st = con.c ......