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,当然如果你打算深入学习的话,最好还是找一些相关的java视频教程来看看。



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