(六)SpringBoot2.0基础篇- Redis整合(JedisCluster集群连接)

时间:2024-06-23 21:03:20

一、环境

  Redis:4.0.9

  SpringBoot:2.0.1

  Redis安装:Linux(Redhat)安装Redis

二、SpringBoot整合Redis

  1、项目基本搭建:

    我们基于(五)SpringBoot2.0基础篇- Mybatis与插件生成代码 该项目来做Redis整合;

  2、添加maven相关依赖和Redis的连接信息:

    Pom.xml

    <!-- Redis的依赖库 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-redis</artifactId>
<version>1.4.7.RELEASE</version>
</dependency> <!-- fastJson 依赖库 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.28</version>
</dependency> <!-- aop依赖库-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>

    application.properties:

spring.redis.cluster.nodes=192.168.1.124:7001

  3、创建RedisProperties属性类和RedisConfig配置类,将JedisCluster放入Spring容器中:

    RedisConfigurationProperties:
package com.cn.common.redis;

import java.util.ArrayList;
import java.util.List;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration; /**
* @program: spring-boot-example
* @description:
* @author:
* @create: 2018-05-16 15:15
**/
@Configuration
@ConfigurationProperties(prefix = "spring.redis.cluster")
public class RedisConfigurationProperties { private List<String> nodes = new ArrayList<>(); public List<String> getNodes() {
return nodes;
} public void setNodes(List<String> nodes) {
this.nodes = nodes;
}
}
    RedisConfig:
package com.cn.common.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; /**
* @program: spring-boot-example
* @description: Redis的配置文件
* @author:
* @create: 2018-05-16 15:01
**/
@Configuration
public class RedisConfig { @Autowired
private RedisConfigurationProperties redisConfigurationProperties; @Bean
public JedisCluster jedisCluster() {
Set<HostAndPort> nodeSet = new HashSet<>();
for(String node :redisConfigurationProperties.getNodes()) {
String[] split = node.split(":");
nodeSet.add(new HostAndPort(split[0],Integer.valueOf(split[1])));
}
return new JedisCluster(nodeSet);
} }

  4、创建封装Redis的增删改查(JedisService,JedisServiceImpl):

package com.cn.common.service;

import java.util.List;
import java.util.Map;
import redis.clients.jedis.GeoRadiusResponse; /**
* @program: spring-boot-example
* @description:
* @author:
* @create: 2018-05-16 15:27
**/
public interface JedisService { /**
* @Description: 是否存在
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
boolean exists(String key); /**
* @Description:缓存set值
* @Param: seconds:缓存时间,不设置则为0
* @return:
* @Author:
* @Date: 2018/5/16
*/
String set(String key,String value,int seconds); /**
* @Description: 重新缓存getSet值
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
String getSet(String key,String value, int seconds); /**
* @Description: 获取set值
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
String get(String key); /**
* @Description: 添加地理位置
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
Long geoadd(String key,double longitude,double latitude,byte[] obj); /**
* @Description: 地理位置查询
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
List<GeoRadiusResponse> georadius(String key,double longitude,double latitude); /**
* @Description: 删除key
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
void delKey(String key); /**
* @Description: 删除native key
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
void delNativeKey(String key); /**
* @Description: 获取map格式的数据
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
Map<String ,Object> getMapData(String key); /**
* @Description: 加锁,避免重复提交
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
boolean lock(String key,int seconds); /**
* @Description: 解锁
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
void unlock(String key); /**
* @Description: 统计锁定次数
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
String getLocakValue(String key);
}

JedisService.java

package com.cn.common.service;

import com.alibaba.fastjson.JSON;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import redis.clients.jedis.GeoRadiusResponse;
import redis.clients.jedis.JedisCluster; /**
* @program: spring-boot-example
* @description:
* @author:
* @create: 2018-05-16 15:45
**/
@Service
public class JedisServiceImpl implements JedisService { @Autowired
private JedisCluster jedisCluster; @Override
public boolean exists(String key) {
boolean flag = false;
flag = jedisCluster.exists(key);
return flag;
} @Override
public String set(String key, String value, int seconds) {
String responseResult = jedisCluster.set(key,value);
if(seconds!=0)
jedisCluster.expire(key,seconds);
return responseResult;
} @Override
public String getSet(String key, String value, int seconds) {
String jedisClusterSet = jedisCluster.getSet(key, value);
jedisCluster.expire(key,seconds);
return jedisClusterSet;
} @Override
public String get(String key) {
String str = jedisCluster.get(key);
return str;
} @Override
public Long geoadd(String key, double longitude, double latitude, byte[] obj) {
return null;
} @Override
public List<GeoRadiusResponse> georadius(String key, double longitude, double latitude) {
return null;
} @Override
public void delKey(String key) {
jedisCluster.del(key);
} @Override
public void delNativeKey(String key) {
jedisCluster.del(key);
} @Override
public Map<String, Object> getMapData(String key) {
String str = jedisCluster.get(key);
Map<String,Object> map = JSON.parseObject(str, Map.class);
return map;
} /**
* @Description: 如为第一次,则加上锁,每次调用值会自动加1
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
@Override
public boolean lock(String key, int seconds) {
if(jedisCluster.incr(key)==1) {
jedisCluster.expire(key,seconds);
return false;
}
return true;
} @Override
public void unlock(String key) {
jedisCluster.del(key);
} @Override
public String getLocakValue(String key) {
return jedisCluster.get(key);
} }

JedisServiceImpl.java

  5、创建注解类和切面类(我使用注解来实现缓存的set和get):

    RedisCache:
package com.cn.common.redis;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target; /**
* @Description: 加上该注解,代理service命中缓存则从缓存中读取数据,否则从service业务逻辑获得,并存入缓存
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD,ElementType.TYPE})
@Documented
public @interface RedisCache { /**
* @Description: 数据返回类型
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
Class type(); /**
* @Description: 数据缓存时间单位s秒
* @Param: 默认10分钟
* @return:
* @Author:
* @Date: 2018/5/16
*/
int cacheTime() default 600; }

    RedisCacheAspect:

package com.cn.common.redis;

import com.alibaba.fastjson.JSON;
import com.cn.common.service.JedisService;
import java.lang.reflect.Method;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component; /**
* @program: spring-boot-example
* @description:
* @author:
* @create: 2018-05-16 16:29
**/ @Aspect
@Component
public class RedisCacheAspect { private Logger logger = LoggerFactory.getLogger(this.getClass()); @Autowired
private JedisService jedisService; @Pointcut("execution(public * com.cn.service..*.*(..))")
public void webAspect(){} @Around("webAspect()")
public Object redisCache(ProceedingJoinPoint pjp) throws Throwable {
//得到类名、方法名和参数
String redisResult = "";
String className = pjp.getTarget().getClass().getName();
String methodName = pjp.getSignature().getName();
Object[] args = pjp.getArgs();
//根据类名,方法名和参数生成key
String key = genKey(className,methodName,args);
logger.info("生成的key[{}]",key);
//得到被代理的方法
Signature signature = pjp.getSignature();
if(!(signature instanceof MethodSignature)){
throw new IllegalArgumentException();
}
MethodSignature methodSignature = (MethodSignature) signature;
Method method = pjp.getTarget().getClass().getMethod(methodSignature.getName(),methodSignature.getParameterTypes());
//得到被代理的方法上的注解
Class modelType = method.getAnnotation(RedisCache.class).type();
int cacheTime = method.getAnnotation(RedisCache.class).cacheTime();
Object result = null;
if(!jedisService.exists(key)) {
logger.info("缓存未命中");
//缓存不存在,则调用原方法,并将结果放入缓存中
result = pjp.proceed(args);
redisResult = JSON.toJSONString(result);
jedisService.set(key,redisResult,cacheTime);
} else{
//缓存命中
logger.info("缓存命中");
redisResult = jedisService.get(key);
//得到被代理方法的返回值类型
Class returnType = method.getReturnType();
result = JSON.parseObject(redisResult,returnType);
}
return result;
} /**
* @Description: 生成key
* @Param:
* @return:
* @Author:
* @Date: 2018/5/16
*/
private String genKey(String className, String methodName, Object[] args) {
StringBuilder sb = new StringBuilder("SpringBoot:");
sb.append(className);
sb.append("_");
sb.append(methodName);
sb.append("_");
for (Object object: args) {
logger.info("obj:"+object);
if(object!=null) {
sb.append(object+"");
sb.append("_");
}
}
return sb.toString();
} }

  6、在StudentServiceImpl中加入缓存注释:

    StudentServiceImpl:

package com.cn.service;

import com.cn.common.redis.RedisCache;
import com.cn.entity.Student;
import com.cn.mapper.StudentMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service; /**
* @program: spring-boot-example
* @description:
* @author:
* @create: 2018-05-11 10:55
**/
@Service
public class StudentServiceImpl implements StudentService{ @Autowired
private StudentMapper studentMapper; @Override
@RedisCache(type = Student.class)
public Student getStudentByPrimaryKey(int id) {
return studentMapper.selectByPrimaryKey(id);
}
}

  7、启动测试:

    第一次调用:

    (六)SpringBoot2.0基础篇- Redis整合(JedisCluster集群连接)

    查看控制台:

    (六)SpringBoot2.0基础篇- Redis整合(JedisCluster集群连接)

    (六)SpringBoot2.0基础篇- Redis整合(JedisCluster集群连接)

    第二次调用:

    (六)SpringBoot2.0基础篇- Redis整合(JedisCluster集群连接)

    查看控制台:

    (六)SpringBoot2.0基础篇- Redis整合(JedisCluster集群连接)

    发现第二次未打印出MyBatis的查询日志,并且显示缓存命中,通过RedisDeskManager工具查看Redis缓存:

    (六)SpringBoot2.0基础篇- Redis整合(JedisCluster集群连接)

    

实例代码:https://gitee.com/lfalex/spring-boot-example/tree/dev/spring-boot-mybatis-redis