singleton錛歋pringIoc瀹瑰櫒鍙細鍒涘緩璇ean鐨勫敮涓瀹炰緥錛屾墍鏈夌殑璇鋒眰鍜屽紩鐢ㄩ兘鍙嬌鐢ㄨ繖涓疄渚?
Property: 姣忔璇鋒眰閮藉垱寤轟竴涓疄渚?
request: 鍦ㄤ竴嬈ttp璇鋒眰涓紝瀹瑰櫒浼氳繑鍥炶Bean鐨勫悓涓涓疄渚嬶紝鑰屽浜庝笉鍚岀殑鐢ㄦ埛璇鋒眰錛屼細榪斿洖涓嶅悓鐨勫疄渚嬨傞渶瑕佹敞鎰忕殑鏄紝璇ヤ綔鐢ㄥ煙浠呭湪鍩轟簬Web鐨? Spring ApplicationContext鎯呭艦涓嬫湁鏁堬紝浠ヤ笅鐨剆ession鍜実lobal Session涔熸槸濡傛
session錛氬悓涓婏紝鍞竴鐨勫尯鍒槸璇鋒眰鐨勪綔鐢ㄥ煙鍙樹負浜唖ession
global session錛氬叏灞鐨凥ttpSession涓紝瀹瑰櫒浼氳繑鍥炶bean鐨勫悓涓涓疄渚嬶紝鍏稿瀷涓哄湪鏄嬌鐢╬ortlet context鐨勬椂鍊欐湁鏁堬紙榪欎釜姒傚康鏈漢涔熶笉鎳傦級
娉ㄦ剰錛氬鏋滆鐢ㄥ埌request錛宻ession錛実lobal session鏃墮渶瑕侀厤緗?
servlet2.4鍙婁互涓婏細
鍦╳eb.xml涓坊鍔狅細
<listener>
<listener-class>org.springframework.web.context.scope.RequestContextListener />
</listener>
servlet2.4浠ヤ笅錛?
闇瑕侀厤緗竴涓繃婊ゅ櫒
<filter>
<filter-name>XXXX</filter-name>
<filter-class>org.springframework.web.filter.RequestContextFilter</filter-class>
<filter-mapping>
<filter-name>XXXX</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
鍙﹀錛屼粠2.0寮濮嬶紝鍙互鑷繁瀹氫箟浣滅敤鍩燂紝浣嗛渶瑕佸疄鐜皊cope錛屽茍閲嶅啓get鍜宺emove鏂規硶
鐗瑰埆瑕佸紩璧鋒敞鎰忕殑鏄細
涓鑸儏鍐典笅鍓嶉潰涓ょ浣滅敤鍩熸槸澶熺敤鐨勶紝浣嗗鏋滄湁榪欐牱涓縐嶆儏鍐碉細singleton綾誨瀷鐨刡ean寮曠敤涓涓猵rototype鐨刡ean鏃朵細鍑虹幇闂錛屽洜涓? singleton鍙垵濮嬪寲涓嬈★紝浣唒rototype姣忚姹備竴嬈￠兘浼氭湁涓涓柊鐨勫璞★紝浣唒rototype綾誨瀷鐨刡ean鏄痵ingleton綾誨瀷 bean鐨勪竴涓睘鎬э紝鐞嗘墍褰撶劧涓嶅彲鑳芥湁鏂皃rototpye鐨刡ean浜х敓錛屼笌鎴戜滑鐨勮姹備笉絎?
瑙ｅ喅鏂規硶錛?
1.鏀懼純Ioc錛岃繖涓庤璁″垵琛蜂笉絎︼紝騫朵唬鐮侀棿浼氭湁鑰﹀悎
2錛孡ookup鏂規硶娉ㄥ叆錛屾帹鑽?
浣嗗湪鐢↙ookup鏂規硶娉ㄥ叆鏃朵篃闇瑕佹敞鎰忎竴鐐癸細闇瑕佸湪寮曠敤鐨凚ean涓畾涓涓竴涓娊璞″湴榪斿洖琚紩鐢ㄥ璞＄殑鏂規硶
package com.huyong.lookup;
import java.util.Calendar;
/**
* @author HuYong Email:yate7571@hotmail.com
*/
public class CurrentTime {
private Calendar now = Calendar.getInstance();
public void printCurrentTime() {
System.out.println("Current Time:" + now.getTime());
}
}
package com.huyong.lookup;
/**
* @author HuYong Email:yate7571@hotmail.com
*/
public abstract class LookupBean {
private CurrentTime currentTime;
public CurrentTime getCurrentTime() {
return currentTime;
}
public void setCurrentTime(CurrentTime currentTime) {
this.currentTime = currentTime;
}
public abstract CurrentTime createCurrentTime();
}
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="currentTime" class="com.huyong.lookup.CurrentTime"
scope="prototype">
</bean>
<bean id="lookupBean" class="com.huyong.lookup.LookupBean"
scope="singleton">
<lookup-method name="createCurrentTime" bean="currentTime" />
<property name="currentTime" ref="currentTime"></property>
</bean>
</beans>
Main Test錛?
package com.huyong.lookup;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
/**
* @author HuYong Email:yate7571@hotmail.com
*/
public class LookupMain {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
ClassPathResource resource = new ClassPathResource(
"applicationContext.xml");
BeanFactory factory = new XmlBeanFactory(resource);
LookupBean lookupBean = (LookupBean) factory.getBean("lookupBean");
System.out.println("----------first time---------");
System.out.println("getCurrentTime:");
lookupBean.getCurrentTime().printCurrentTime();
System.out.println("createCurrentTime:");
lookupBean.createCurrentTime().printCurrentTime();
Thread.sleep(12345);
System.out.println("---------second time---------");
System.out.println("getCurrentTime:");
LookupBean lookupBean02 = (LookupBean) factory.getBean("lookupBean");
lookupBean02.getCurrentTime().printCurrentTime();
System.out.println("createCurrentTime:");
lookupBean02.createCurrentTime().printCurrentTime();
}
}
]]>
瑕佸啀JSP閲岄潰寰楀埌ApplicationContext闇瑕佽繖涔堝仛錛岄鍏坕mport="org.springframework.web.context.support.*,org.springframework.context.*"
鐒跺悗鍙互閫氳繃濡備綍鍋氭硶錛?/p>
ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
榪欐牱灝卞緱鍒頒簡ApplicationContext錛屽氨鍙互鎿嶄綔Spring浜嗐?/p>
JSP鏈潵灝卞彲浠ヨ涓烘槸涓涓猄ervlet錛屾墍浠ヤ嬌鐢╣etServletContext()灝辨槸鐞嗘墍搴斿綋浜嗐?/p>
涓錛歸eb.xml閰嶇疆
<servlet>
<servlet-name>context</servlet-name>
<servlet-class>
org.springframework.web.context.ContextLoaderServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
浜岋細鍦↗SP
<%@ page import="org.springframework.context.ApplicationContext"%>
<%@ page import="org.springframework.web.context.support.WebApplicationContextUtils"%>
<%@ page import="com.yourcompany.service.CategoryService"%>
<%
//涓婇潰鐨凜ategoryService寮曠敤鏄垜鑷繁鐨勪笢瑗?br />
//applicationContext.xml涓竴瀹氳鏈夊畬鏁寸殑渚濊禆閾撅紝浠巇ataSource鍒癈ategoryService
ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());
CategoryService cs = (CategoryService) ctx.getBean("CategoryService");
List list =cs.getCategoryDAO().findAll();
%>
]]>