spring集成redis(单节点)

redis是一种非关系型数据库，与mongoDB不同的是redis是内存数据库，所以访问速度很快。常用作缓存和发布-订阅式的消息队列。redis官方没有提供windows版本的软件。windows版本一直是微软维护的。

下载地址：https://github.com/MSOpenTech/redis/releases。

这里是redis相关的教程。http://muxiulin.cn/archives/1197

在spring中集成redis很简单，这里用的是ssm框架+maven构建的项目。

1、首先是需要引入的pom.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.redis</groupId>
  <artifactId>spring-redis</artifactId>
  <version>1.0-SNAPSHOT</version>

  <name>spring-redis</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <maven.compiler.source>1.7</maven.compiler.source>
      <maven.compiler.target>1.7</maven.compiler.target>
      <spring.version>4.3.17.RELEASE</spring.version>
  </properties>

  <dependencies>
      <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.11</version>
          <scope>test</scope>
      </dependency>

      <!-- 日志 -->
      <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-api</artifactId>
          <version>1.7.25</version>
      </dependency>
      <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
          <version>1.7.25</version>
      </dependency>

      <!-- redis -->
      <dependency>
          <groupId>org.springframework.data</groupId>
          <artifactId>spring-data-redis</artifactId>
          <version>1.7.2.RELEASE</version>
      </dependency>
      <dependency>
          <groupId>redis.clients</groupId>
          <artifactId>jedis</artifactId>
          <version>2.9.0</version>
      </dependency>

      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-aop</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-tx</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-beans</artifactId>
          <version>${spring.version}</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context-support</artifactId>
          <version>${spring.version}</version>
      </dependency>

      <dependency>
          <groupId>com.google.code.gson</groupId>
          <artifactId>gson</artifactId>
          <version>2.8.5</version>
      </dependency>

      <dependency>
          <groupId>com.alibaba</groupId>
          <artifactId>fastjson</artifactId>
          <version>1.2.45</version>
      </dependency>
      <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-databind</artifactId>
          <version>2.8.8</version>
      </dependency>

      <dependency>
          <groupId>org.apache.commons</groupId>
          <artifactId>commons-lang3</artifactId>
          <version>3.7</version>
      </dependency>

  </dependencies>

  <build>
      <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
          <plugins>
              <plugin>
                  <groupId>org.apache.maven.plugins</groupId>
                  <artifactId>maven-compiler-plugin</artifactId>
                  <version>3.5.1</version>
                  <configuration>
                      <source>1.7</source>
                      <target>1.7</target>
                  </configuration>
              </plugin>
              <plugin>
                <artifactId>maven-clean-plugin</artifactId>
                <version>3.0.0</version>
              </plugin>
              <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
              <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <version>3.0.2</version>
              </plugin>
              <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
              </plugin>
              <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.20.1</version>
              </plugin>
              <plugin>
                <artifactId>maven-jar-plugin</artifactId>
                <version>3.0.2</version>
              </plugin>
              <plugin>
                <artifactId>maven-install-plugin</artifactId>
                <version>2.5.2</version>
              </plugin>
              <plugin>
                <artifactId>maven-deploy-plugin</artifactId>
                <version>2.8.2</version>
              </plugin>
          </plugins>
      </pluginManagement>
  </build>
</project>

2、Redis参数配置 ：redis.properties

#ip地址
redis.host=127.0.0.1
#端口号
redis.port=6389  
#如果有密码
redis.pass=123456
redis.dbIndex=0  
redis.expiration=3000  
#最大空闲数
redis.maxIdle=300 
#连接池的最大数据库连接数。设为0表示无限制,如果是jedis 2.4以后用redis.maxTotal 
redis.maxActive=600  
#最大建立连接等待时间
redis.maxWait=1000  
#是否在从池中取出连接前进行检验,如果检验失败,则从池中去除连接并尝试取出另一个
redis.testOnBorrow=true
#客户端超时时间单位是毫秒 默认是2000
redis.timeout=10000  
#控制一个pool可分配多少个jedis实例,用来替换上面的redis.maxActive,如果是jedis 2.4以后用该属性
redis.maxTotal=1000  
#最大建立连接等待时间。如果超过此时间将接到异常。设为-1表示无限制。
redis.maxWaitMillis=1000  
#连接的最小空闲时间 默认1800000毫秒(30分钟)
redis.minEvictableIdleTimeMillis=300000  
#每次释放连接的最大数目,默认3
redis.numTestsPerEvictionRun=1024  
#逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1
redis.timeBetweenEvictionRunsMillis=30000  
#在空闲时检查有效性, 默认false
redis.testWhileIdle=true

3、Redis配置文件：redis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
      xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
      xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
   <description>redis单节点</description>


   <!-- 加载properties文件 -->
   <bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
      <property name="locations">
         <list>
            <value>classpath*:/redis.properties</value>
         </list>
      </property>
   </bean>

   <!-- 配置JedisPoolConfig实例 -->
   <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
      <!--最大空闲数-->
      <property name="maxIdle" value="${redis.maxIdle}" />
      <!--连接池的最大数据库连接数  -->
      <property name="maxTotal" value="${redis.maxActive}" />
      <!--最大建立连接等待时间-->
      <property name="maxWaitMillis" value="${redis.maxWait}" />
      <!--是否在从池中取出连接前进行检验,如果检验失败,则从池中去除连接并尝试取出另一个-->
      <property name="testOnBorrow" value="${redis.testOnBorrow}" />
      <!--逐出连接的最小空闲时间 默认1800000毫秒(30分钟)-->
      <property name="minEvictableIdleTimeMillis" value="${redis.minEvictableIdleTimeMillis}" />
      <!--每次逐出检查时 逐出的最大数目 如果为负数就是 : 1/abs(n), 默认3-->
      <property name="numTestsPerEvictionRun" value="${redis.numTestsPerEvictionRun}" />
      <!--逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1-->
      <property name="timeBetweenEvictionRunsMillis" value="${redis.timeBetweenEvictionRunsMillis}" />
   </bean>

   <!-- 配置JedisConnectionFactory -->
   <bean id="jedisConnectionFactory"
        class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
      <property name="hostName" value="${redis.host}" />
      <property name="port" value="${redis.port}" />
      <property name="password" value="${redis.pass}" />
      <property name="database" value="${redis.dbIndex}" />
      <property name="poolConfig" ref="poolConfig" />
   </bean>

   <!-- key序列化 -->
   <bean id="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer" />

   <bean id="stringRedisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
      <property name="connectionFactory" ref="jedisConnectionFactory" />
   </bean>

   <!-- 配置RedisTemplate -->
   <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
      <property name="connectionFactory" ref="jedisConnectionFactory" />
      <!--<property name="keySerializer">
         <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
      </property>
      <property name="valueSerializer">
         <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
      </property>
      <property name="hashKeySerializer">
         <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
      </property>
      <property name="hashValueSerializer">
         <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
      </property>-->
   </bean>

   <!-- 配置RedisCacheManager -->
   <bean id="redisCacheManager" class="org.springframework.data.redis.cache.RedisCacheManager">
      <constructor-arg name="redisOperations" ref="redisTemplate" />
      <property name="defaultExpiration" value="${redis.expiration}" />
   </bean>

   <!-- 配置RedisCacheConfig -->
   <bean id="redisCacheConfig" class="com.custom.config.redis.RedisCacheConfig">
      <constructor-arg ref="jedisConnectionFactory" />
      <constructor-arg ref="redisTemplate" />
      <constructor-arg ref="redisCacheManager" />
   </bean>
</beans>

4、将redis配置文件加入到applicationContext中：applicationContext-basic.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
      xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
      xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
   <description>Spring公共配置 </description>

   <!-- 使用annotation 自动注册bean, 并保证@Required、@Autowired的属性被注入 -->
   <context:component-scan base-package="com.custom">
      <context:include-filter type="annotation" expression="org.springframework.stereotype.Service" />
   </context:component-scan>

   <!-- redis单节点配置 -->
   <import resource="classpath*:redis.xml" />


</beans>

5、RedisCacheCofig配置文件：RedisCacheConfig.java

import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;

import java.lang.reflect.Method;


/**
 * Copyright (C), 2011-2018 {company}
 * FileName: com.huateng.config.RedisCacheConfig.java
 * Author: xxx
 * Email: xxx
 * Date: 2018/6/6 17:49
 * Description:
 * History:
 * <Author>      <Time>    <version>    <desc>
 * {xxx}   17:49    1.0          Create
 */
@Configuration
@EnableCaching
public class RedisCacheConfig extends CachingConfigurerSupport {
    private volatile JedisConnectionFactory jedisConnectionFactory;
    private volatile RedisTemplate<String, String> redisTemplate;
    private volatile RedisCacheManager redisCacheManager;

    public RedisCacheConfig() {
        super();
    }

    /**
     * 带参数的构造方法 初始化所有的成员变量
     *
     * @param jedisConnectionFactory
     * @param redisTemplate
     * @param redisCacheManager
     */
    public RedisCacheConfig(JedisConnectionFactory jedisConnectionFactory, RedisTemplate<String, String> redisTemplate,
                            RedisCacheManager redisCacheManager) {
        this.jedisConnectionFactory = jedisConnectionFactory;
        this.redisTemplate = redisTemplate;
        this.redisCacheManager = redisCacheManager;
    }

    public JedisConnectionFactory getJedisConnecionFactory() {
        return jedisConnectionFactory;
    }

    public RedisTemplate<String, String> getRedisTemplate() {
        return redisTemplate;
    }

    public RedisCacheManager getRedisCacheManager() {
        return redisCacheManager;
    }

    @Bean
    public KeyGenerator customKeyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... objects) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : objects) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };
    }
}

6、redis实现方法的结果缓存

缓存机制说明：所有的查询结果都放进了缓存，也就是把MySQL查询的结果放到了redis中去，
然后第二次发起该条查询时就可以从redis中去读取查询的结果，从而不与MySQL交互，从而达到优化的效果，
redis的查询速度之于MySQL的查询速度相当于 内存读写速度 /硬盘读写速度
@Cacheable("a")注解的意义就是把该方法的查询结果放到redis中去，

下一次再发起查询就去redis中去取，存在redis中的数据的key就是a；

@CacheEvict(value={"a","b"},allEntries=true) 的意思就是

执行该方法后要清除redis中key名称为a,b的数据；

如下示例：

@Cacheable("testMethod") //标注该方法查询的结果进入缓存，再次访问时直接读取缓存中的数据
public String testMethod(){
    return "123456";
}

@CacheEvict(value= {"testMethod"},allEntries=true)
public void deleteRedis() {

}

spring集成redis(单节点)

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