原文地址：http://www.cnblogs.com/zhongshengzhen/  
先安装libevent,memcached依赖libevent的lib
[root@VM_64_81_centos download]#  wget http://www.monkey.org/~provos/libevent-1.2.tar.gz
[root@VM_64_81_centos download]#  tar zxvf libevent-1.2.tar.gz
[root@VM_64_81_centos download]# cd libevent-1.2
 
设置安装目录
[root@VM_64_81_centos libevent-1.2]# ./configure –prefix=/usr/
 
安装
[root@VM_64_81_centos libevent-1.2]# make && make install
   
测试是否安装成功
[root@VM_64_81_centos memcached-1.2.0]#  ls -al /usr/lib | grep libevent 

lrwxrwxrwx   1 root root     21 Jan 14 17:47 libevent-1.2.so.1 -> libevent-1.2.so.1.0.3

-rwxr-xr-x   1 root root 264056 Jan 14 17:47 libevent-1.2.so.1.0.3

-rw-r–r–   1 root root 430396 Jan 14 17:47 libevent.a

-rwxr-xr-x   1 root root    814 Jan 14 17:47 libevent.la

lrwxrwxrwx   1 root root     21 Jan 14 17:47 libevent.so -> libevent-1.2.so.1.0.3    
安装memcache Memcache是一个hash表形式的缓存服务。用户缓存数据达到提供响应效率和处理高并发的情况。
[root@VM_64_81_centos download]# wget http://www.danga.com/memcached/dist/memcached-1.2.0.tar.gz
[root@VM_64_81_centos download]# tar zxvf 
memcached-1.2.0.tar.gz
[root@VM_64_81_centos download]#cd memcached-1.2.0
[root@VM_64_81_centos memcached-1.2.0]# ./configure -with-libevent=/usr
[root@VM_64_81_centos memcached-1.2.0]# make
[root@VM_64_81_centos memcached-1.2.0]# make install  
测试是否安装成功 [root@VM_64_81_centos memcached-1.2.0]#  ls -al /usr/local/bin/mem* 

-rwxr-xr-x 1 root root 113188 Jan 14 17:51 /usr/local/bin/memcached

-rwxr-xr-x 1 root root 117535 Jan 14 17:51 /usr/local/bin/memcached-debug  
启动memcached 
[root@a ~]# 
/usr/local/bin/memcached -d -m 512 -u root -l 127.0.0.1 -p 11211 -c 256 -P /tmp/memcached.pid
root 用户名
512缓存大小512M
192.168.137.33 本机ip
11211分配的端口
256是连接数  
 
SPRINGMVC配置memcached
#######################设置Memcached服务器参数#######################
#设置服务器地址
memcached.server=目标服务器ip:11211  #该端口号默认为11211
#容错
memcached.failOver=true
#设置初始连接数
memcached.initConn=20
#设置最小连接数
memcached.minConn=10
#设置最大连接数
memcached.maxConn=250
#设置连接池维护线程的睡眠时间
memcached.maintSleep=3000
#设置是否使用Nagle算法（Socket的参数），如果是true在写数据时不缓冲，立即发送出去
memcached.nagle=false
#设置socket的读取等待超时时间
memcached.socketTO=3000
#设置连接心跳监测开关
memcached.aliveCheck=true  
卸载memcached 1.结束memcached进程

# killall memcached

2.删除memcached目录及文件

# rm -rf /usr/local/memcached

# rm -f /etc/rc.d/init.d/memcached

3.关闭memcached开机启动

# chkconfig memcached off

4.把memcached移出开机启动

# chkconfig –del memcached  
错误说明： 1、[root@VM_64_81_centos memcached-1.2.0]# /usr/local/bin/memcached -d -m 512 -u root -l 127.0.0.1 -p 11211 -c 256 -P /tmp/memcached.pid

/usr/local/bin/memcached: error while loading shared libraries: libevent-1.2.so.1: cannot open shared object file: No such file or directory

解决： 原因是memcached在/usr/lib/找不到文件，因而设置一个软连接如下：
[root@VM_64_81_centos lib]# ln -s /usr/lib/libevent-1.2.so.1  /usr/lib64/
 
 spring+java测试Memcache
spring配置：

<bean id=”testCached” class=”com.danga.MemCached.MemCachedClient”>
<constructor-arg><value>neeaMemcachedPoolUserLogin</value></constructor-arg>
</bean>
<bean id=”memcachedPooluserLogin” class=”com.danga.MemCached.SockIOPool” factory-method=”getInstance”
init-method=”initialize” destroy-method=”shutDown”>
<constructor-arg><value>neeaMemcachedPoolUserLogin</value></constructor-arg>
<property name=”servers”>
<list>
<value>127.0.0.1:11211</value>
</list>
</property>
<property name=”initConn”><value>20</value></property>
<property name=”minConn”><value>10</value></property>
<property name=”maxConn”><value>800</value></property>
<property name=”maintSleep”><value>30</value></property>
<property name=”nagle”><value>false</value></property>
<property name=”socketTO”><value>3000</value></property>
</bean>

JAVA代码：

@Component
public class SysCacheHelper {
@Autowired
@Qualifier(“testCached”)
private MemCachedClient cache;

public boolean setSysCache(int categoryId, TSysConfig sysConfig){
return cache.set(Constants.SYS_PREFIX + categoryId, sysConfig, LoginedCacheHelper.get3DayCalendarTime(Constants.SYS_CACHE_EXPIRED_DAY));
}
public TSysConfig getSysCache(int categoryId){
return (TSysConfig)cache.get(Constants.SYS_PREFIX + categoryId);
}
public boolean removeSysCache(int categoryId){
return cache.delete(Constants.SYS_PREFIX + categoryId);
}
}

可以调用方法查看memcached中的内容。

示例代码只是摘录重要片段。