今天写了半天程序，有点乏了。想想来配置一下tomcat-redis-session-manager吧，但是按照 官方文档配了总是tomcat启动错误。
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java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool$Config
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google了半天终于找到了解决办法，现记录如下。
出现上面错误的原因其实很明显，只是我太粗心了，没有找到类。
当然首先下载所需的包了：
Commons-Pool Jedis tomcat-redis-session-manager
将这些jar包都丢到tomcat的lib目录下，然后配置context.xml了，将如下内容添加到context.xml中
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<
Valve
className
=
"com.radiadesign.catalina.session.RedisSessionHandlerValve"
/>
<
Manager
className
=
"com.radiadesign.catalina.session.RedisSessionManager"
host
=
"localhost"
<!-- optional: defaults to "localhost" -->
port="6379"
<!-- optional: defaults to "6379" -->
database="0"
<!-- optional: defaults to "0" -->
maxInactiveInterval="60"
<!-- optional: defaults to "60" (in seconds) -->
/>
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Value字段需要出现在Manager字段之前，然后启动你的tomcat，在redis-server控制台上就可以看到如下信息了
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[1638] 27 Mar 19:09:14 - Accepted 127.0.0.1:43670
[1638] 27 Mar 19:09:18 - Accepted 127.0.0.1:43671
[1638] 27 Mar 19:09:18 - 1 clients connected (0 slaves), 555984 bytes
in
use
[1638] 27 Mar 19:09:19 - Accepted 127.0.0.1:43673
[1638] 27 Mar 19:09:23 - 1 clients connected (0 slaves), 555984 bytes
in
use
[1638] 27 Mar 19:09:26 * 1 changes
in
3600 seconds. Saving...
[1638] 27 Mar 19:09:26 * Background saving started by pid 7151
[1638] 27 Mar 19:09:26 - Accepted 127.0.0.1:43683
[7151] 27 Mar 19:09:26 * DB saved on disk
[1638] 27 Mar 19:09:26 * Background saving terminated with success
[1638] 27 Mar 19:09:28 - DB 0: 1 keys (1 volatile)
in
4 slots HT.
[1638] 27 Mar 19:09:28 - 2 clients connected (0 slaves), 565608 bytes
in
use
[1638] 27 Mar 19:09:33 - DB 0: 1 keys (1 volatile)
in
4 slots HT.
[1638] 27 Mar 19:09:33 - 2 clients connected (0 slaves), 565608 bytes
in
use
[1638] 27 Mar 19:09:38 - DB 0: 1 keys (1 volatile)
in
4 slots HT.
[1638] 27 Mar 19:09:38 - 2 clients connected (0 slaves), 565608 bytes
in
use
[1638] 27 Mar 19:09:43 - DB 0: 1 keys (1 volatile)
in
4 slots HT.
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忘了说了，tomcat-redis-session-manager不支持tomcat 7.x，tomcat 7.x的支持还在努力中啊，所以如果要用的话，请使用tomcat 6.x
