OSCache缓存机制实战-优快云博客

本文链接：https://blog.youkuaiyun.com/jaytse/article/details/2710728

rel="File-List" href="file:///C:%5CDOCUME%7E1%5CADMINI%7E1%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml"> rel="Edit-Time-Data" href="file:///C:%5CDOCUME%7E1%5CADMINI%7E1%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_editdata.mso">

新建项目StudyOSCache, 目录如下所示

https://p-blog.youkuaiyun.com/images/p_blog_youkuaiyun.com/jaytse/EntryImages/20080725/p.JPG

commons-logging.properties

org.apache.commons.logging.Log=org.apache.commons.logging.impl.Log4JLogger

log4j.properties

log4j.rootLogger=DEBUG,stdout,file

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=[start]%d{yyyy/MM/dd/ HH:mm:ss}[DATE]%n%p[PRIORITY]%n%x[NDC]%n%t[THREAD] n%c[CATEGORY]%n%m[MESSAGE]%n%n

log4j.appender.file=org.apache.log4j.RollingFileAppender

log4j.appender.file.File=oscache.log

log4j.appender.file.MaxFileSize=100KB

log4j.appender.file.MaxBackupIndex=5

log4j.appender.file.layout=org.apache.log4j.PatternLayout

log4j.appender.file.layout.ConversionPattern=[start]%d{yyyy/MM/dd/ HH:mm:ss}[DATE]%n%p[PRIORITY]%n%x[NDC]%n%t[THREAD] n%c[CATEGORY]%n%m[MESSAGE]%n%n

log4j.logger.org.apache.commons=ERROR

log4j.logger.com.opensymphony.oscache.base=INFO

oscache.properties

cache.capacity=1000

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_4.xsd"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_4.xsd"

id="WebApp_ID" version="2.5">

<display-name>StudyOSCache</display-name>

<taglib-uri>oscache</taglib-uri>

<taglib-location>/WEB-INF/classes/oscache.tld</taglib-location>

</taglib>

</web-app>

cache1.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"

pageEncoding="GB18030"%>

<%@ page import="java.util.*" %>

<%@ taglib uri="oscache" prefix="cache" %>

<!DOCTYPE html PUBLIC "-//W 3C //DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>Insert title here</title>

</head>

<body>

没有缓存的日期: <%= new Date() %><p>

<cache:cache time="30">

每30秒刷新缓存一次的日期: <%= new Date() %><p>

</cache:cache>

<cache:cache key="testcache">

手动刷新缓存的日期: <%= new Date() %> <p>

</cache:cache>

</body>

</html>

cache2.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"

pageEncoding="GB18030"%>

<%@ taglib uri="oscache" prefix="cache" %>

<!DOCTYPE html PUBLIC "-//W 3C //DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>Insert title here</title>

</head>

<body>

缓存已刷新...<p>

<cache:flush key="testcache" scope="application"/>

</body>

</html>

注意在web.xml中, EC Europea生成如下的web.xml,并不能很好的运行Taglib,将2.5改为2.4就没有问题了

原文件为:

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

id="WebApp_ID" version="2.5">

修改后文件为:

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_4.xsd"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_4.xsd"

id="WebApp_ID" version="2.5">

OSCACHE基础应用