spring boot整合redis(单机+集群)
如果使用的是redis2.x，在项目中使用客户端分片（Shard）机制,已经很久之前的版本,该换新了(此处略过),
本文讲解基于redis3.x中的集群，通过两部分来阐述spring boot整合redis,在项目中使用jedisCluster机制。
第一部分:spring boot自带整合的redis,比较简单,看下来
1>不用多说,pom.xml文件增加redis与spring boot的依赖
org.springframework.boot
spring-boot-starter-redis
1.4.7.RELEASE
2>application.properties增加redis节点配置
#redis单服务器配置
spring.redis.database=0
spring.redis.host=127.0.0.1
spring.redis.port=6379
spring.redis.password=
spring.redis.pool.max-active=8
spring.redis.pool.max-wait=-1
spring.redis.pool.max-idle=8
spring.redis.pool.min-idle=0
spring.redis.timeout=03>在需要使用的地方增加RedisTemplate依赖,我只在controller试了下.代码如下:
package com.xyy.controller;
import java.util.HashMap;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;
import com.danga.MemCached.MemCachedClient;
import com.xyy.model.Favorite;
import com.xyy.service.FavoriteService;
/**
* Favorite控制层
* @ClassName: FavoriteController
* @author wujing
* @date 2017-07-13 15:09:50
*/
@RestController
@RequestMapping("/favorite")
public class FavoriteController{
private static final Logger LOGGER = LoggerFactory.getLogger(FavoriteController.class);
@Autowired
private FavoriteService favoriteService;
@Autowired
private MemCachedClient memCachedClient ;
@Autowired
private RedisTemplate redisTemplate;
/**
* Favorite编辑
* @Title: update
* @param favorite 修改对象
* @return Object
* @author wujing
* @date 2017-07-13 15:09:50
*/
//@RequestMapping("/detail2/{id}")
public Object detail2(@PathVariable Long id,ModelMap modelMap) {
Map resultMap = new HashMap();
try {
Favorite tempFavorite = favoriteService.selectByPrimaryKey(id);
resultMap.put("status", "success");
resultMap.put("data", tempFavorite);
} catch (Exception e) {
resultMap.put("status", "error");
resultMap.put("errorMsg", "系统异常");
LOGGER.error("Favorite添加异常", e);
}
return resultMap;
}
@RequestMapping("/detail/{id}")
public Object detail(@PathVariable Long id,ModelMap modelMap) {
try {
/*Favorite tempFavorite = (Favorite) memCachedClient.get("favorite:"+id);
if(tempFavorite == null) {
tempFavorite = favoriteService.selectByPrimaryKey(id);
memCachedClient.set("favorite:"+id, tempFavorite);
}*/
ValueOperations operations = redisTemplate.opsForValue();
Favorite tempFavorite = operations.get("favorite:"+id);
if(tempFavorite == null) {
tempFavorite = favoriteService.selectByPrimaryKey(id);
operations.set("favorite:"+id, tempFavorite);
}
modelMap.put("tempFavorite", tempFavorite);
} catch (Exception e) {
LOGGER.error("Favorite查询异常", e);
}
return new ModelAndView("favorite/detail");
}
} 就是这么简单,不得不说spring boot做了很多事,极大的简化了开发的难度 ..让我等屌丝完全沉沦于码农了
随着项目的扩大,数据的增加,项目面临的考验也越来越明显,性能,扩展,容灾..等都是很重要的,这时候分布式或集群就显得尤为重要了
redis 3.X,在项目中使用jedisCluster机制。
1>pom.xml增加jedisCluster依赖
org.springframework.boot
spring-boot-starter-redis
1.4.7.RELEASE
1:直接在application.properties添加,此处就不详细介绍了
2:采用javaben的方式配置(此处需要注意spring boot 1.5以后的版本@ConfigurationProperties取消了locations属性),可以通过@PropertySource("classpath:redis.properties")引入配置文件,当然如果写在application.properties下,不需要引用该注解,如下
package com.xyy.util.cached.redis;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
/**
* redis集群配置文件
* @ClassName: RedisProperties
* @author wangqinghua
* @date 2017年7月24日 下午5:29:19
*/
@Component
@ConfigurationProperties(prefix = "xyy.redis.pool")
@PropertySource("classpath:redis.properties")
public class RedisProperties {
/** redis集群节点 */
private String nodes;
/** 连接超时时间 */
private int timeout;
/** 重连次数 */
private int maxAttempts;
public String getNodes() {
return nodes;
}
public void setNodes(String nodes) {
this.nodes = nodes;
}
public int getTimeout() {
return timeout;
}
public void setTimeout(int timeout) {
this.timeout = timeout;
}
public int getMaxAttempts() {
return maxAttempts;
}
public void setMaxAttempts(int maxAttempts) {
this.maxAttempts = maxAttempts;
}
}redis.properties配置文件如下:
#redis集群配置
xyy.redis.pool.nodes=127.0.0.1:6379,127.0.0.1:6380,127.0.0.1:6381
xyy.redis.pool.timeout=3000
xyy.redis.pool.maxAttempts=5
3>创建JedisCluster对象
package com.xyy.util.cached.redis;
import java.util.HashSet;
import java.util.Set;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import redis.clients.jedis.HostAndPort;
import redis.clients.jedis.JedisCluster;
/**
* 生成JedisCluster对象
* @ClassName: JedisClusterConfig
* @author wangqinghua
* @date 2017年7月24日 下午7:08:03
*/
@Configuration
public class JedisClusterConfig {
@Autowired
private RedisProperties redisProperties;
/**
* 注意：
* 这里返回的JedisCluster是单例的，并且可以直接注入到其他类中去使用
* @return
*/
@Bean
public JedisCluster getJedisCluster() {
String[] serverArray = redisProperties.getNodes().split(",");//获取服务器数组(这里要相信自己的输入，所以没有考虑空指针问题)
Set nodes = new HashSet<>();
for (String ipPort : serverArray) {
String[] ipPortPair = ipPort.split(":");
nodes.add(new HostAndPort(ipPortPair[0].trim(), Integer.valueOf(ipPortPair[1].trim())));
}
return new JedisCluster(nodes, redisProperties.getTimeout(),redisProperties.getMaxAttempts());
}
} 4>自定义RedisTemplate
package com.xyy.util.cached.redis;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import redis.clients.jedis.JedisCluster;
/**
* 自定义redisTemplate
* @ClassName: XyyRedisTemplate
* @author wangqinghua
* @date 2017年7月24日 下午7:09:49
*/
@Component
public class XyyRedisTemplate {
private static final Logger LOGGER = LoggerFactory.getLogger(XyyRedisTemplate.class);
@Autowired
private JedisCluster jedisCluster;
@Autowired
private RedisProperties redisProperties;
private static final String KEY_SPLIT = ":"; //用于隔开缓存前缀与缓存键值
/**
* 设置缓存
* @param prefix 缓存前缀（用于区分缓存，防止缓存键值重复）
* @param key 缓存key
* @param value 缓存value
*/
public void set(String prefix, String key, String value) {
jedisCluster.set(prefix + KEY_SPLIT + key, value);
LOGGER.debug("RedisUtil:set cache key={},value={}", prefix + KEY_SPLIT + key, value);
}
/**
* 设置缓存，并且自己指定过期时间
* @param prefix
* @param key
* @param value
* @param expireTime 过期时间
*/
public void setWithExpireTime(String prefix, String key, String value, int expireTime) {
jedisCluster.setex(prefix + KEY_SPLIT + key, expireTime, value);
LOGGER.debug("RedisUtil:setWithExpireTime cache key={},value={},expireTime={}", prefix + KEY_SPLIT + key, value,
expireTime);
}
/**
* 设置缓存，并且由配置文件指定过期时间
* @param prefix
* @param key
* @param value
*/
public void setWithExpireTime(String prefix, String key, String value) {
int EXPIRE_SECONDS = redisProperties.getTimeout();
jedisCluster.setex(prefix + KEY_SPLIT + key, EXPIRE_SECONDS, value);
LOGGER.debug("RedisUtil:setWithExpireTime cache key={},value={},expireTime={}", prefix + KEY_SPLIT + key, value,
EXPIRE_SECONDS);
}
/**
* 获取指定key的缓存
* @param prefix
* @param key
*/
public String get(String prefix, String key) {
String value = jedisCluster.get(prefix + KEY_SPLIT + key);
LOGGER.debug("RedisUtil:get cache key={},value={}", prefix + KEY_SPLIT + key, value);
return value;
}
/**
* 删除指定key的缓存
* @param prefix
* @param key
*/
public void deleteWithPrefix(String prefix, String key) {
jedisCluster.del(prefix + KEY_SPLIT + key);
LOGGER.debug("RedisUtil:delete cache key={}", prefix + KEY_SPLIT + key);
}
public void delete(String key) {
jedisCluster.del(key);
LOGGER.debug("RedisUtil:delete cache key={}", key);
}
}5>如何使用,和spring boot自带的就很类似了
package com.xyy.controller;
import java.util.HashMap;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.ui.ModelMap;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;
import com.danga.MemCached.MemCachedClient;
import com.xyy.model.Favorite;
import com.xyy.service.FavoriteService;
import com.xyy.util.JsonUtil;
import com.xyy.util.cached.redis.XyyRedisTemplate;
/**
* Favorite控制层
* @ClassName: FavoriteController
* @author wujing
* @date 2017-07-13 15:09:50
*/
@RestController
@RequestMapping("/favorite")
public class FavoriteController{
private static final Logger LOGGER = LoggerFactory.getLogger(FavoriteController.class);
@Autowired
private FavoriteService favoriteService;
@Autowired
private MemCachedClient memCachedClient ;
@Autowired
private RedisTemplate redisTemplate;
@Autowired
private XyyRedisTemplate xyyRedisTemplate;
/**
* Favorite编辑
* @Title: update
* @param favorite 修改对象
* @return Object
* @author wujing
* @date 2017-07-13 15:09:50
*/
//@RequestMapping("/detail2/{id}")
public Object detail2(@PathVariable Long id,ModelMap modelMap) {
Map resultMap = new HashMap();
try {
Favorite tempFavorite = favoriteService.selectByPrimaryKey(id);
resultMap.put("status", "success");
resultMap.put("data", tempFavorite);
} catch (Exception e) {
resultMap.put("status", "error");
resultMap.put("errorMsg", "系统异常");
LOGGER.error("Favorite添加异常", e);
}
return resultMap;
}
@RequestMapping("/detail/{id}")
public Object detail(@PathVariable Long id,ModelMap modelMap) {
try {
/*Favorite tempFavorite = (Favorite) memCachedClient.get("favorite:"+id);
if(tempFavorite == null) {
tempFavorite = favoriteService.selectByPrimaryKey(id);
memCachedClient.set("favorite:"+id, tempFavorite);
}*/
/*ValueOperations operations = redisTemplate.opsForValue();
Favorite tempFavorite = operations.get("favorite:"+id);
if(tempFavorite == null) {
tempFavorite = favoriteService.selectByPrimaryKey(id);
operations.set("favorite:"+id, tempFavorite);
}*/
Favorite tempFavorite = null;
String value = xyyRedisTemplate.get("favorite",String.valueOf(id));
if(StringUtils.isEmpty(value)) {
tempFavorite = favoriteService.selectByPrimaryKey(id);
xyyRedisTemplate.set("favorite",String.valueOf(id), JsonUtil.objToString(tempFavorite));
}else {
tempFavorite = JsonUtil.stringToObj(value, Favorite.class);
}
modelMap.put("tempFavorite", tempFavorite);
} catch (Exception e) {
LOGGER.error("Favorite查询异常", e);
}
return new ModelAndView("favorite/detail");
}
} JsonUtil工具包,为公司自定义文件,这个就不公开了,可以自行采用各种json包来解析 ....
redis整合,在这里,也将告一段落了,有什么疑问欢迎留言!