redis集成spring，使用注解缓存

爱被打了一巴掌 2022-05-15 13:54 281阅读 0赞

### 1.创建一个maven工程redis-cache ###

### 2.pom文件的依赖 ###

<dependency>
    	    <groupId>org.junit.jupiter</groupId>
    	    <artifactId>junit-jupiter-engine</artifactId>
    	    <version>5.2.0</version>
    	    <scope>test</scope>
    	</dependency>
    	<dependency>
    	    <groupId>org.junit.platform</groupId>
    	    <artifactId>junit-platform-runner</artifactId>
    	    <version>1.2.0</version>
    	    <scope>test</scope>
    	</dependency>
      	<dependency>
    	    <groupId>org.freemarker</groupId>
    	    <artifactId>freemarker</artifactId>
    	    <version>2.3.28</version>
    	</dependency>
      	
    	<dependency>
    	    <groupId>redis.clients</groupId>
    	    <artifactId>jedis</artifactId>
    	    <version>2.9.0</version>
    	</dependency>
    	<dependency>
    	    <groupId>org.springframework</groupId>
    	    <artifactId>spring-webmvc</artifactId>
    	    <version>5.1.1.RELEASE</version>
    	</dependency>
    	
    	<dependency>
    	    <groupId>org.springframework</groupId>
    	    <artifactId>spring-test</artifactId>
    	    <version>5.1.1.RELEASE</version>
    	    <scope>test</scope>
    	</dependency>
    	
    	
    	<dependency>
    	    <groupId>org.springframework.data</groupId>
    	    <artifactId>spring-data-redis</artifactId>
    	    <version>2.1.1.RELEASE</version>
    	</dependency>

### 3. spring-redis-cache.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:p="http://www.springframework.org/schema/p"
    	xmlns:c="http://www.springframework.org/schema/c"
    	xmlns:context="http://www.springframework.org/schema/context"
    	xmlns:jee="http://www.springframework.org/schema/jee"
    	xmlns:tx="http://www.springframework.org/schema/tx"
    	xmlns:aop="http://www.springframework.org/schema/aop"
    	xmlns:cache="http://www.springframework.org/schema/cache"
    	xsi:schemaLocation="  
                http://www.springframework.org/schema/beans 
                http://www.springframework.org/schema/beans/spring-beans-4.2.xsd  
                http://www.springframework.org/schema/context 
                http://www.springframework.org/schema/context/spring-context-4.2.xsd 
                http://www.springframework.org/schema/cache 
                http://www.springframework.org/schema/cache/spring-cache-4.2.xsd ">
        
        <context:component-scan base-package="com.szcatic"/>
    	
        <cache:annotation-driven cache-manager="redisCacheManager"/>
    	
    	<bean id="redisCacheManager" class="org.springframework.data.redis.cache.RedisCacheManager"
            factory-method="create" c:connection-factory-ref="jedisConnectionFactory" />
            
    	
    	<bean id="redisClusterConfiguration"
    		class="org.springframework.data.redis.connection.RedisClusterConfiguration">
    		<property name="maxRedirects" value="3"></property>
    		
    		<property name="clusterNodes">
    			<set>
    				<bean
    					class="org.springframework.data.redis.connection.RedisClusterNode">
    					<constructor-arg name="host" value="127.0.0.1 "></constructor-arg>
    					<constructor-arg name="port" value="7000"></constructor-arg>
    				</bean>
    				<bean
    					class="org.springframework.data.redis.connection.RedisClusterNode">
    					<constructor-arg name="host" value="127.0.0.1 "></constructor-arg>
    					<constructor-arg name="port" value="7001"></constructor-arg>
    				</bean>
    				<bean
    					class="org.springframework.data.redis.connection.RedisClusterNode">
    					<constructor-arg name="host" value="127.0.0.1 "></constructor-arg>
    					<constructor-arg name="port" value="7002"></constructor-arg>
    				</bean>
    				<bean
    					class="org.springframework.data.redis.connection.RedisClusterNode">
    					<constructor-arg name="host" value="127.0.0.1"></constructor-arg>
    					<constructor-arg name="port" value="7003"></constructor-arg>
    				</bean>
    				<bean
    					class="org.springframework.data.redis.connection.RedisClusterNode">
    					<constructor-arg name="host" value="127.0.0.1"></constructor-arg>
    					<constructor-arg name="port" value="7004"></constructor-arg>
    				</bean>
    				<bean
    					class="org.springframework.data.redis.connection.RedisClusterNode">
    					<constructor-arg name="host" value="127.0.0.1"></constructor-arg>
    					<constructor-arg name="port" value="7005"></constructor-arg>
    				</bean>
    			</set>
    		</property>
    	</bean>
    	<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
    		<property name="maxIdle" value="100" />
    		<property name="maxTotal" value="600" />
    	</bean>
    	<bean id="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer" />
    	<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
    		<constructor-arg ref="redisClusterConfiguration" />
    		<constructor-arg ref="jedisPoolConfig" />
    	</bean>
    	
    	<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
    		<property name="connectionFactory" ref="jedisConnectionFactory" />
    		
    		<property name="keySerializer" ref="stringRedisSerializer" />
    		<property name="hashKeySerializer" ref="stringRedisSerializer" />
    	</bean>
    
    </beans>

### 4.UserDao查询数据接口 ###

package com.szcatic.dao;
    
    import org.springframework.cache.annotation.CacheEvict;
    import org.springframework.cache.annotation.CachePut;
    import org.springframework.cache.annotation.Cacheable;
    import org.springframework.stereotype.Repository;
    
    @Repository
    public class UserDao {
    	
    	/**
    	 * 注解@Cacheable声明Spring在调用方法之前，首先应该在缓存中查找方法的返回值。
    	 * 如果这个值能够找到，就会返回存储的值，
    	 * 否则的话，这个方法就会被调用，返回值会放在缓存之中。
    	 * @param userId
    	 * @return
    	 */
    	@Cacheable(value = "userCache", key = "1000")
    	public String getUserName(String userName) {
    		System.out.println("查询用户名");
    		return userName;
    	}
    	
    	/**
    	 * 主要针对方法配置，能够根据方法的请求参数对其结果进行缓存，
    	 * 和 @Cacheable 不同的是，它每次都会触发真实方法的调用
    	 * @param userName
    	 */
    	@CachePut(value = "userCache", key = "1000")
    	public String updateUserName(String userName) {
    		System.out.println("更新用户名并添加到缓存");
    		return userName;
    	}
    	
    	/**
    	 * 是否清空所有缓存内容，缺省为 false，
    	 * 如果指定为 true，则方法调用后将立即清空所有缓存
    	 */
    	@CacheEvict(value="userCache", allEntries=true)
    	public void deleteUserName() {
    		System.out.println("删除数据并清空缓存");
    	}
    	
    }

### 5.测试类 ###

package com.szcatic.test;
    
    import org.junit.jupiter.api.Test;
    import org.junit.jupiter.api.extension.ExtendWith;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.test.context.ContextConfiguration;
    import org.springframework.test.context.junit.jupiter.SpringExtension;
    
    import com.szcatic.dao.UserDao;
    
    @ExtendWith(SpringExtension.class)
    @ContextConfiguration("classpath:spring-redis-cache.xml") 
    public class CacheTest {
    	
    	@Autowired
    	private UserDao userDao;
    	
    	@Test
    	void testGetUserName() {
    		String userName = userDao.getUserName("zhangsan");
    		System.out.println(userName);
    	}
    	
    	@Test
    	void testUpdateUserName() {
    		String userName = userDao.updateUserName("lisi");
    		System.out.println(userName);
    	}
    	
    	@Test
    	void testDeleteUserName() {
    		userDao.deleteUserName();
    	}
    	
    	@Test
    	void testAll() {
    		testDeleteUserName();
    		testGetUserName();
    		testUpdateUserName();
    		testGetUserName();
    		testDeleteUserName();
    		testGetUserName();
    	}
    	
    	
    }

###  6.testAll测试方法运行结果： ###

删除数据并清空缓存
    查询用户名
    zhangsan
    更新用户名并添加到缓存
    lisi
    lisi
    删除数据并清空缓存
    查询用户名
    zhangsan

### 7.项目目录结构 ###

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