JSPһЩ±êÇ©, ¶ÔÓ¦µÄ java´úÂë
1.
<jsp:useBran id="cb" class="bean.CounterBean" >
</jsp:useBean>
¶ÔÓ¦´úÂ룺 <%CounterBean cb = new CounterBean();%>
2.
<jsp:setProperty name ="cb" property="count" value = "23"/> ¶ÔÓ¦´úÂ룺
<%-- cb.setCount(Integer.paseInt("23"))- -%>
3.
<jsp:setProperty name ="cb" property="count" ¶ÔÓ¦´úÂ룺
<%-- out.print(cb.getCount())--%>
4.(ÖØµã) <jsp:useBean id = "counterBean"
scope = "request"
class = "bean.CounterBean" />
¶ÔÓ¦´úÂ룺
<% bean.CouterBean counterBean = (bean.CouterBean)request.getAttribute("counterBean");
if(counterBean = null){
counterBean = new bean.CounterBean();
request.SetAttribute("counterBean",counterBean)
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1. ¼ò½é
2. °²×°
3. log4j»ù±¾¸ÅÄî
3.1. Logger
3.2. Appender
3.2.1. ʹÓÃConsoleAppender
3.2.2. ʹÓÃFileAppender
3.2.3. ʹÓÃWriterAppender
3.3. Layout
3.4. »ù±¾Ê¾Àý
3.4.1. SimpleLayoutºÍFileAppender
3.4.2. HTMLLayoutºÍWriterAppender
3.4.3. PatternLayoutºÍConsoleAppender
4. ʹÓÃÍⲿ ......
JCP SE/EE Ö´ÐÐίԱ»á
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JSR 330
—— Dependency Injection for Java¡£¸Ã¹æ·¶ÓÚ ½ñÄê 5 Ô 9 ÈÕ
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¶ÔÓÚѧϰstaticÎÒÃÇÏÈÀ´¿´Á½¸öÀý×Ó£º
//Example 1 Tst.java£¬no main() method
package com.blogchina.qb2049;
public class Tst
{
static { System.out.println("111111"); }
}
ÔËÐнá¹ûΪ: 111111
Exception in thread "main" java.lang.NoSuchMethodError: main
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