Spring整合Jedis
1.单实例
step1：毫无疑问，首先需要在pom.xml中配置Jedis依赖
redis.clients
jedis
2.9.0
step2：在resources中添加settings.properties，配置redis相关属性
#jedisPoolConfig
redis.minIdle=100
redis.maxIdle=500
redis.maxTotal=50000
redis.maxWaitMillis=10000
redis.testOnBorrow=true
#jedisPool
redis.host=127.0.0.1
redis.port=6379
redis.timeout=2000
step3：在spring-context.xml配置JedisPoolConfig及JedisPool
classpath:settings.properties
JedisPool只有简单配置，如果需要增加其它配置项（如密码等），请自行参照JedisPool的构造方法进行配置
step4：在TestController中测试是否连接成功
package controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
@Controller
public class TestController {
@Autowired
private JedisPool jedisPool;
@RequestMapping(value = "test",method = RequestMethod.GET,produces = "application/json;charset=utf-8")
@ResponseBody
public String test(){
return jedisPool.getResource().ping();
}
public static void main(String[] args) {
Jedis jedis = new Jedis("127.0.0.1",6379);
System.out.println(jedis.ping());
}
}
step5：启动、运行、报错
nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
查看源码发现JedisPoolConfig继承自GenericObjectPoolConfig
package redis.clients.jedis;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
public class JedisPoolConfig extends GenericObjectPoolConfig {
public JedisPoolConfig() {
this.setTestWhileIdle(true);
this.setMinEvictableIdleTimeMillis(60000L);
this.setTimeBetweenEvictionRunsMillis(30000L);
this.setNumTestsPerEvictionRun(-1);
}
}
而GenericObjectPoolConfig在package org.apache.commons.pool2.impl中，所以需要引入commons-pool2依赖
org.apache.commons
commons-pool2
2.4.2
再次运行，得到“Pong”的response结果，测试成功
2.配置Redis简单主从复制
Jedis对redis的集群支持也很完善，实例化SharedJedisPool即可
classpath:settings.properties
3.sentinel模式
仅仅配置了主从复制是不够的，没有sentinel就不能实现故障转移，redis集群就失去意义了。
spring-data-redis对sentinel提供了很好的支持，详细配置如下
pom.xml
4.0.0
me.com
springmvc
1.0-SNAPSHOT
4.3.0.RELEASE
org.springframework
spring-core
${spring.version}
org.springframework
spring-context
${spring.version}
org.springframework
spring-webmvc
${spring.version}
redis.clients
jedis
2.9.0
org.apache.commons
commons-pool2
2.4.2
org.springframework.data
spring-data-redis
1.8.0.RELEASE
settings.properties
#jedisPoolConfig
redis.maxTotal=50000
redis.maxIdle=500
redis.minIdle=100
redis.maxWaitMillis=10000
redis.testOnBorrow=true
#redis-sentinel
redis.sentinel=127.0.0.1:26379
redis.master=mymaster
spring-context.xml
classpath:settings.properties
${redis.sentinel}
TestController
package controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class TestController {
@Autowired
private StringRedisTemplate stringRedisTemplate;
@RequestMapping(value = "test",method = RequestMethod.GET,produces = "application/json;charset=utf-8")
@ResponseBody
public String test(){
stringRedisTemplate.opsForValue().set("key1","v1");
return stringRedisTemplate.opsForValue().get("key1");
}
}
另外，特别提醒：
sentinel.conf配置文件中明确说明，需要绑定ip或者解除保护模式（生产环境下建议绑定ip）
# *** IMPORTANT ***
#
# By default Sentinel will not be reachable from interfaces different than
# localhost, either use the 'bind' directive to bind to a list of network
# interfaces, or disable protected mode with "protected-mode no" by
# adding it to this configuration file.
#
# Before doing that MAKE SURE the instance is protected from the outside
# world via firewalling or other means.
#
# For example you may use one of the following:
#
# bind 127.0.0.1 192.168.1.1
#
# protected-mode no
否则会报错：All sentinels down, cannot determine where is mymaster master is running...
4.配置Redis Cluster
Redis Cluster是3.0版本后的一种集群系统，它实现了数据分片，解决了单机数据容量瓶颈问题，同时也实现了高可用。
使用Spring+Jedis配置Redis Cluster也非常简单。
org.springframework.data.redis.connection.RedisClusterConfiguration和org.springframework.data.redis.connection.jedis.JedisConnectionFactory已经为我们封装好了所有的设置，再通过org.springframework.data.redis.core.StringRedisTemplate，就可以在代码中很方便地对Redis进行读写！