标签：style blog http io ar color os 使用 sp
首先不得不服Spring这个宇宙无敌的开源框架，几乎整合了所有流行的其它框架，http://projects.spring.io/spring-data/ 从这上面看，当下流行的redis、solr、hadoop、mongoDB、couchBase... 全都收入囊中。对于redis整合而言，主要用到的是spring-data-redis
使用步骤：
一、pom添加依赖项
<dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.4.1.RELEASE</version> </dependency>
其它Spring必备组件，比如Core,Beans之类，大家自行添加吧
观察一下：
jedis、jredis等常用java的redis client已经支持了，不知道以后会不会集成Redisson，spring-data-redis提供了一个非常有用的类：StringRedisTemplate
对于大多数缓存应用场景而言，字符串是最常用的缓存项，用StringRedisTemplate可以轻松应付。
二、spring配置
1 <bean id="redisSentinelConfiguration" 2 class="org.springframework.data.redis.connection.RedisSentinelConfiguration"> 3 <property name="master"> 4 <bean class="org.springframework.data.redis.connection.RedisNode"> 5 <property name="name" value="mymaster"></property> 6 </bean> 7 </property> 8 <property name="sentinels"> 9 <set> 10 <bean class="org.springframework.data.redis.connection.RedisNode"> 11 <constructor-arg index="0" value="10.6.1**.**5" /> 12 <constructor-arg index="1" value="7031" /> 13 </bean> 14 <bean class="org.springframework.data.redis.connection.RedisNode"> 15 <constructor-arg index="0" value="10.6.1**.**6" /> 16 <constructor-arg index="1" value="7031" /> 17 </bean> 18 <bean class="org.springframework.data.redis.connection.RedisNode"> 19 <constructor-arg index="0" value="10.6.1**.**1" /> 20 <constructor-arg index="1" value="7031" /> 21 </bean> 22 </set> 23 </property> 24 </bean> 25 26 <bean id="jedisConnFactory" 27 class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> 28 <constructor-arg ref="redisSentinelConfiguration" /> 29 </bean> 30 31 <bean id="stringRedisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate"> 32 <property name="connectionFactory" ref="jedisConnFactory" /> 33 </bean>
这里我们使用Sentinel模式来配置redis连接，从上篇学习知道，sentinel是一种高可用架构，个人推荐在生产环境中使用sentinel模式。
三、单元测试
1 @Test 2 public void testSpringRedis() { 3 ConfigurableApplicationContext ctx = null; 4 try { 5 ctx = new ClassPathXmlApplicationContext("spring.xml"); 6 7 StringRedisTemplate stringRedisTemplate = ctx.getBean("stringRedisTemplate", StringRedisTemplate.class); 8 9 // String读写 10 stringRedisTemplate.delete("myStr"); 11 stringRedisTemplate.opsForValue().set("myStr", "http://yjmyzz.cnblogs.com/"); 12 System.out.println(stringRedisTemplate.opsForValue().get("myStr")); 13 System.out.println("---------------"); 14 15 // List读写 16 stringRedisTemplate.delete("myList"); 17 stringRedisTemplate.opsForList().rightPush("myList", "A"); 18 stringRedisTemplate.opsForList().rightPush("myList", "B"); 19 stringRedisTemplate.opsForList().leftPush("myList", "0"); 20 List<String> listCache = stringRedisTemplate.opsForList().range( 21 "myList", 0, -1); 22 for (String s : listCache) { 23 System.out.println(s); 24 } 25 System.out.println("---------------"); 26 27 // Set读写 28 stringRedisTemplate.delete("mySet"); 29 stringRedisTemplate.opsForSet().add("mySet", "A"); 30 stringRedisTemplate.opsForSet().add("mySet", "B"); 31 stringRedisTemplate.opsForSet().add("mySet", "C"); 32 Set<String> setCache = stringRedisTemplate.opsForSet().members( 33 "mySet"); 34 for (String s : setCache) { 35 System.out.println(s); 36 } 37 System.out.println("---------------"); 38 39 // Hash读写 40 stringRedisTemplate.delete("myHash"); 41 stringRedisTemplate.opsForHash().put("myHash", "PEK", "北京"); 42 stringRedisTemplate.opsForHash().put("myHash", "SHA", "上海虹桥"); 43 stringRedisTemplate.opsForHash().put("myHash", "PVG", "浦东"); 44 Map<Object, Object> hashCache = stringRedisTemplate.opsForHash() 45 .entries("myHash"); 46 for (Map.Entry<Object, Object> entry : hashCache.entrySet()) { 47 System.out.println(entry.getKey() + " - " + entry.getValue()); 48 } 49 50 System.out.println("---------------"); 51 52 } finally { 53 if (ctx != null && ctx.isActive()) { 54 ctx.close(); 55 } 56 } 57 58 }
运行一下，行云流水般的输出：
...
信息: Created JedisPool to master at 10.6.144.***:7030
http://yjmyzz.cnblogs.com/
---------------
0
A
B
---------------
C
B
A
---------------
SHA - 上海虹桥
PVG - 浦东
PEK - 北京
---------------
...
注意红色标出部分，从eclipse控制台的输出，还能看出当前的master是哪台服务器
三、POJO对象的缓存
Spring提供的StringRedisTemplate只能对String操作，大多数情况下已经够用，但如果真需要向redis中存放POJO对象也不难，我们可以参考StringRedisTemplate的源码，扩展出ObjectRedisTemplate
1 package org.springframework.data.redis.core; 2 3 import org.springframework.data.redis.connection.DefaultStringRedisConnection; 4 import org.springframework.data.redis.connection.RedisConnection; 5 import org.springframework.data.redis.connection.RedisConnectionFactory; 6 import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer; 7 import org.springframework.data.redis.serializer.RedisSerializer; 8 9 public class ObjectRedisTemplate<T> extends RedisTemplate<String, T> { 10 11 public ObjectRedisTemplate(RedisConnectionFactory connectionFactory, 12 Class<T> clazz) { 13 14 RedisSerializer<T> objectSerializer = new Jackson2JsonRedisSerializer<T>( 15 clazz); 16 setKeySerializer(objectSerializer); 17 setValueSerializer(objectSerializer); 18 setHashKeySerializer(objectSerializer); 19 setHashValueSerializer(objectSerializer); 20 21 setConnectionFactory(connectionFactory); 22 afterPropertiesSet(); 23 } 24 25 protected RedisConnection preProcessConnection(RedisConnection connection, 26 boolean existingConnection) { 27 return new DefaultStringRedisConnection(connection); 28 } 29 }
然后就可以这样用了：
1 @Test 2 public void testSpringRedis() { 3 ConfigurableApplicationContext ctx = null; 4 try { 5 ctx = new ClassPathXmlApplicationContext("spring.xml"); 6 7 JedisConnectionFactory connFactory = ctx.getBean( 8 "jedisConnFactory", JedisConnectionFactory.class); 9 10 ObjectRedisTemplate<SampleBean> template = new ObjectRedisTemplate<SampleBean>( 11 connFactory, SampleBean.class); 12 13 template.delete("myBean"); 14 SampleBean bean = new SampleBean("菩提树下的杨过"); 15 template.opsForValue().set("myBean", bean); 16 17 System.out.println(template.opsForValue().get("myBean")); 18 19 } finally { 20 if (ctx != null && ctx.isActive()) { 21 ctx.close(); 22 } 23 } 24 }
其中SampleBean的定义如下：
1 package com.cnblogs.yjmyzz; 2 3 import java.io.Serializable; 4 5 public class SampleBean implements Serializable { 6 7 private static final long serialVersionUID = -303232410998377570L; 8 9 private String name; 10 11 public SampleBean() { 12 } 13 14 public SampleBean(String name) { 15 this.name = name; 16 } 17 18 public String getName() { 19 return name; 20 } 21 22 public void setName(String name) { 23 this.name = name; 24 } 25 26 public String toString() { 27 return "name:" + name; 28 } 29 30 }
注：由于不是标准的String类型，所以在redis控制台，用./redis-cli get myBean是看不到缓存内容的，只能得到nil的输出，不要误以为set没成功！通过代码是可以正常get到缓存值的。
标签：style blog http io ar color os 使用 sp
原文地址：http://www.cnblogs.com/yjmyzz/p/integrate-redis-with-spring.html
