serialnum

Author: caoxicaoSource: http://blog.csdn.net/caoxicao Code Analysis:Function checkserialnum (Whatid, what, retailer, curr, whse){If (form1.salesman. value = ""){Alert ("select a store first ");Return;}If (event. keycode = 13){VaR oxmlhttp = new activexobject ("Microsoft. XMLHTTP "); Oxmlhttp. Open ("Post", "qrysn. asp? Serialnum = "+ What +" retailer = "+ retailer +" curr = "+ curr +" whse = "+ whse, false ); Oxmlhttp. Send ();If (Unescape (oxmlhtt

I used a previous article to explain how to dynamically add a line of technology. Function checkserialnum (Whatid, what, retailer, curr, whse){If (form1.salesman. value = ""){Alert ("select a store first ");Return;}If (event. keycode = 13){VaR oxmlhttp = new activexobject ("Microsoft. XMLHTTP "); Oxmlhttp. Open ("Post", "qrysn. asp? Serialnum = "+ What +" retailer = "+ retailer +" curr = "+ curr +" whse = "+ whse, false ); Oxmlhttp. Send ();If (Une

processes are analyzed based on the output results. Class SerialNum public class SerialNum {// The next serial number to be assigned private static int nextSerialNum = 0; public static ThreadLocal serialNum = new ThreadLocal() { protected synchronized Object initialValue() { return new Integer(nextSerialNum++); } }; public st

1, in multithreaded programming, sometimes need to automatically generates each start line into a unique identity, this time, through a threadlocal variable to save the identity of each thread is the most effective, most convenient way.2. ThreadLocal instances are typically private static fields in a class3, in the construction of threadlocal, by overriding the subclass of the method to rewrite the sequence number. The purpose of generating the serial number for each thread is thus achieved.Impo

class Serialnum {//The next serial number to be assigned private static int nextserialnum = 0; public static ThreadLocal Serialnum = new ThreadLocal () { protected synchronized Object InitialValue () { return NE W Integer (nextserialnum++); } }; public static int Get () { return ((Integer) (Serialnum.get ())). Intvalue (); public static void Set (int val) {

= thread. currentthread ();Object o = values. Get (curthread );If (O = NULL ! Values. containskey (curthread )){O = initialvalue ();Values. Put (curthread, O );}Return O;} Public void set (Object newvalue ){Values. Put (thread. currentthread (), newvalue );} Public object initialvalue (){Return NULL;}} Of course, this is not an industrial implementation, but the general idea of threadlocal implementation in JDK is similar to this. Threadlocal usage If you want to initialize other values for the

Java objects are instantiated in the following ways:1. Use new2. Factory mode3. Reflection4. Clone () method5. Deserialization mode/** implementing Cloneable and Serializable interfaces */ public class book implements Cloneable, Serializable { Private static final long serialversionuid = 1L; Private Integer Serialnum;//serial number private String name;//Library name Public book () { System.out.println ("default constructor "); }

, this is not an industrial implementation, but the general idea of threadlocal implementation in JDK is similar to this. Threadlocal usage If you want to initialize other values for the thread local variable, You need to implement the threadlocal subclass and override this method. Generally, a internal Anonymous class is used to subclass threadlocal. For example, in the following example, the serialnum class assigns an serial number for each clas

Generally, the serial number of an application is required to generate the last several consecutive strings according to certain rules. below is the code used in my project to generate the serial number, in which the lock mechanism is used. Import java. text. simpleDateFormat; import java. util. date; import org. apache. commons. lang3.StringUtils;/*** generate the serial number tool class * @ version V1.0 * @ date: 5:21:37 */public class SerialNum {

There are many ways to create multithreading in Java, here's a quick comb1. Inheriting the thread classInherit the Java.lang.Thread class, create a local multithreaded class, overload the Run () method, and invoke the thread's method to start the threads. The sample code is as follows:Mythread.javaPublicClassMyThreadExtendsThread {PublicvoidRun () {Privateint copy =0; System.out.println ("Thread ID:" + thread.currentthread (). GetName () +"= = Print Time:" + system.currenttimemillis ()); System.

Copy Code code as follows: Import Java.text.SimpleDateFormat; Import Java.util.Date; Import Org.apache.commons.lang3.StringUtils; /*** Produces the serial Number tool class* @version V1.0* @date: 2013-11-16 5:21:37*/ public class Serialnum { private static String count = "000";private static String DateValue = "20131115"; /** * produces serial number */ public synchronized static String Getmoveorderno () { long No = 0; simpled

There are currently three types of SQL Server wildcard characters, "%", "_", "[charlist]", and three are used for fuzzy queries.The following are presented separately:1, "%""%" is used for any string containing 0 or more characters, instead of the indeterminate part of the query condition, in general, the% wildcard is used to match the following characters, and is a full-text search with a slower speedExample: SELECT * from PRODUCEDATATB WHERE serialnum