Java使用memcache示例
Windows系统下memcache的安装cmd进入到memcache目录下（win10需要以管理员身份运行cmd）
memcache.exe -d install
memcache.exe -d start
启动memcache服务后可以在windows服务中看到名称为memcache 的服务
Java使用memcache
项目目录如下
User.java
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public class User implements Serializable{
private static final long serialVersionUID = 1L;
private String username;
private String password;
//省略构造函数级getter setter
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((password == null) ? 0 : password.hashCode());
result = prime * result
+ ((username == null) ? 0 : username.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
User other = (User) obj;
if (password == null) {
if (other.password != null)
return false;
} else if (!password.equals(other.password))
return false;
if (username == null) {
if (other.username != null)
return false;
} else if (!username.equals(other.username))
return false;
return true;
}
}
MemcachedUtil.java
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public class MemcachedUtil {
/**
* memcached客户端单例
*/
private static MemCachedClient cachedClient = new MemCachedClient();
/**
* 初始化连接池
*/
static {
//获取连接池的实例
SockIOPool pool = SockIOPool.getInstance();
//服务器列表及其权重
String[] servers = {"127.0.0.1:11211"};
Integer[] weights = {3};
//设置服务器信息
pool.setServers(servers);
pool.setWeights(weights);
//设置初始连接数、最小连接数、最大连接数、最大处理时间
pool.setInitConn(10);
pool.setMinConn(10);
pool.setMaxConn(1000);
pool.setMaxIdle(1000*60*60);
//设置连接池守护线程的睡眠时间
pool.setMaintSleep(60);
//设置TCP参数，连接超时
pool.setNagle(false);
pool.setSocketTO(60);
pool.setSocketConnectTO(0);
//初始化并启动连接池
pool.initialize();
//压缩设置，超过指定大小的都压缩
// cachedClient.setCompressEnable(true);
// cachedClient.setCompressThreshold(1024*1024);
}
private MemcachedUtil(){
}
public static boolean add(String key, Object value) {
return cachedClient.add(key, value);
}
public static boolean add(String key, Object value, Integer expire) {
return cachedClient.add(key, value, expire);
}
public static boolean put(String key, Object value) {
return cachedClient.set(key, value);
}
public static boolean put(String key, Object value, Integer expire) {
return cachedClient.set(key, value, expire);
}
public static boolean replace(String key, Object value) {
return cachedClient.replace(key, value);
}
public static boolean replace(String key, Object value, Integer expire) {
return cachedClient.replace(key, value, expire);
}
public static Object get(String key) {
return cachedClient.get(key);
}
}
MemcachedUtilTest.java测试类
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public class MemcachedUtilTest {
@Test
public void testMemcached() {
MemcachedUtil.put("hello", "world", 60);
String hello = (String) MemcachedUtil.get("hello");
Assert.assertEquals("world", hello);
for(int i = 0; i < 10000; ++i) {
User user = new User("Jason" + i, "123456-" + i);
MemcachedUtil.put("user" + i, user, 60);
Object obj = MemcachedUtil.get("user" + i);
Assert.assertEquals(user, obj);
}
}
}
在Spring中配置并使用memcache
applicationContext.xml配置文件
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<?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.xsd">
<bean id="memcachedPool" class="com.danga.MemCached.SockIOPool"
factory-method="getInstance" init-method="initialize">
<constructor-arg>
<value>neeaMemcachedPool</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>50</value>
</property>
<property name="nagle">
<value>false</value>
</property>
<property name="socketTO">
<value>3000</value>
</property>
</bean>
<bean id="memcachedClient" class="com.danga.MemCached.MemCachedClient">
<constructor-arg>
<value>neeaMemcachedPool</value>
</constructor-arg>
</bean>
</beans>
MemcachedSpringTest.java测试类
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public class MemcachedSpringTest {
private MemCachedClient cachedClient;
@Before
public void init() {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
cachedClient = (MemCachedClient)context.getBean("memcachedClient");
}
@Test
public void testMemcachedSpring() {
User user = new User("lou", "jason");
cachedClient.set("user", user);
User cachedBean = (User)user;
Assert.assertEquals(user, cachedBean);
}
}
本机测试全部通过
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