第五课 tomcat集群使用redis实现session共享
2018-08-27 本文已影响1人
Arroganter
1、网上查找资料，大部分从下面网址下载java代码，因是几年前实现的（大概2,3年前吧），不支持tomcat8
https://github.com/jcoleman/tomcat-redis-session-manager
2、在myeclipse 新建一个maven项目【maven-archetype-quickstart】
源文件新建包名com.orangefunction.tomcat.redissessions
讲下载下来的java类拷贝到该包之下（这些java类只实现tomcat7，实现tomcat8需要做一些修改）
JavaSerializer.java
RedisSession.java
RedisSessionHandlerValve.java
RedisSessionManager.java
Serializer.java
SessionSerializationMetadata.java
image.png
3、maven设置
====tomcat8 maven pom.xml====
<dependencies>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-catalina</artifactId>
<version>8.0.33</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.7.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin> <!-- 打jar包 -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.0</version>
<configuration>
<!-- 源代码编译版本 -->
<source>1.8</source>
<!-- 目标平台编译版本 -->
<target>1.8</target>
<!-- 字符集编码 -->
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
image.png
image.png
将打包出来的tomcat-redis的jar包和
jedis-2.7.2.jar
commons-pool2-2.3.jar
拷贝到tomcat的lib文件夹下面
4、tomcat配置
====tomcat context.xml====
<!--
com.orangefunction.tomcat.redissessions 是自定义maven项目的报名路径，切需要与maven 中 RedisSessionManager的serializationStrategyClass值一致
-->
<!-- redis session 共享配置 -->
<Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />
<Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager"
host="127.0.0.1"
port="6379"
database="0"
maxInactiveInterval="60" />
5、需要特别注意的是项目中要存入session的对象必须实现序列化，否知会出现序列化错误
public class Test implements Serializable {
private static final long serialVersionUID = 5021582410009851677L;
......
}
tomcat209
<%@ page import="com.neuedu.bean.Person" %><%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2018/7/17
Time:
13:57
To change this template use File | Settings | File Templates.
--%>
<%@ page
contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<%
Person person = new Person();
person.setId(3);
person.setName("zhangsan");
session.setAttribute("person",person);
session.setAttribute("msg","hello");
%>
<%=session.getId()%>
tomcat141
</body>
</html>
tomcat209
<%@ page import="com.neuedu.bean.Person" %><%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2018/7/17
Time:
13:57
To change this template use File | Settings | File Templates.
--%>
<%@ page
contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<%
if(session.getAttribute("person") != null)
{
Person person = (Person)session.getAttribute("person");
out.print(person.getName());
}
else
{
out.print("null");
}
%>
<%=session.getId()%>
tomcat209
</body>
</html>
