SSM框架SpringMVC+ Spring + MyBatis（集成redis缓存）

淩亂°似流年 2023-03-14 10:53 68阅读 0赞

## 1.pom.xml  ##

<dependency>
    			<groupId>redis.clients</groupId>
    			<artifactId>jedis</artifactId>
    			<version>2.9.0</version>
    		</dependency>
    
    		
    		<dependency>
    			<groupId>org.springframework.data</groupId>
    			<artifactId>spring-data-redis</artifactId>
    			<version>1.6.2.RELEASE</version>
    		</dependency>

引入redis的依赖，这里遇到的问题Could not initialize class org.springframework.data.redis.connection.jedis.JedisConnectionFactory

经查阅是redis的版本问题，用上面的版本即可解决该问题。

# 2.redis.properties #

redis.host=127.0.0.1
    redis.port=6379
    redis.maxIdle=300
    redis.maxWaitMillis=1000
    redis.maxTotal=600
    redis.testOnBorrow=true
    redis.testOnReturn=true

redis的配置，启动本地的redis的服务

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2_size_16_color_FFFFFF_t_70][]

# 3.spring-redis.xml #

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	   xmlns="http://www.springframework.org/schema/beans"
    	   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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd ">
    
    	
    	
    
    
        
        <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
            <property name="locations">
                <list>
                    <value>classpath*:redis.properties</value>
                </list>
            </property>
            <property name="ignoreUnresolvablePlaceholders" value="true" />
        </bean>
    
    	<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
    		<property name="maxTotal" value="${redis.maxTotal}"/>
            <property name="maxWaitMillis" value="${redis.maxWaitMillis}"/>
            <property name="testOnReturn" value="${redis.testOnReturn}"/>
    		<property name="maxIdle" value="${redis.maxIdle}" />
    		<property name="testOnBorrow" value="${redis.testOnBorrow}"/>
    	</bean>
    
    	
    	<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" >
    		<property name="hostName" value="${redis.host}"></property>
    		<property name="port" value="${redis.port}"></property>
    		
    		<property name="poolConfig"  ref="poolConfig"></property>
    	</bean>
    
        
        <bean id="jdkSerializationRedisSerializer" class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
        <bean id="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
    
        
        <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
            <property name="connectionFactory" ref="jedisConnectionFactory"></property>
            <property name="keySerializer" ref="stringRedisSerializer"></property>
            <property name="valueSerializer" ref="jdkSerializationRedisSerializer"></property>
        </bean>
    
    </beans>

配置redis的连接信息。

**这里遇到的问题是，项目中有两个properties配置文件，一个数据库的，一个redis的，所以需要采用以下方式配置**

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
            <property name="locations">
                <list>
                    <value>classpath*:redis.properties</value>
                </list>
            </property>
            <property name="ignoreUnresolvablePlaceholders" value="true" />
        </bean>

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    		<property name="locations">
    			<list>
    				<value>classpath*:jdbc.properties</value>
    			</list>
    		</property>
    		<property name="ignoreUnresolvablePlaceholders" value="true" />
    	</bean>

# 4.BookController中实现redis #

@Autowired
    	private RedisTemplate redisTemplate;
    	/**
    	 * 这里就是测试redis
    	 */
    	@RequestMapping(value = "/redis", method = RequestMethod.GET)
    	private String redis(Model model) {
    		Book book = (Book) redisTemplate.opsForValue().get("book");
    		if (book == null){
    			book = bookService.getById(1001);
    			logger.info("从数据库获取id为1001的图书{};", book);
    			// 将数据设置到缓存中 30秒的有效期
    			redisTemplate.opsForValue().set("book",book,30, TimeUnit.SECONDS);
    		}else {
    			logger.info("从redis缓存中获取id为1001的图书{};", book);
    		}
    		model.addAttribute("book", book);
    		return "detail";
    	}

测试结果：

**第一次访问 [http://localhost:8082/ssm\_war/book/redis][http_localhost_8082_ssm_war_book_redis]**

从数据库获取id为1001的图书Book \[bookId=1001, name=高并发处理, number=10\];

**第二次访问**：从redis缓存中获取id为1001的图书Book \[bookId=1001, name=高并发处理, number=10\];

自此完成了简单的redis的缓存，注意里面的实体类需要序列化。

**使用redis的客户端也可以看到缓存的book的信息。**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2_size_16_color_FFFFFF_t_70 1][]

**下载代码 [https://github.com/ChenXbFrank/ssm/tree/devlop/][https_github.com_ChenXbFrank_ssm_tree_devlop]  **

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2_size_16_color_FFFFFF_t_70]: /images/20230312/c45ce5e409b94c7698b835c5e56d6d2c.png
[http_localhost_8082_ssm_war_book_redis]: http://localhost:8082/ssm_war/book/redis
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2_size_16_color_FFFFFF_t_70 1]: /images/20230312/11bc8c658b294b96914896001017147b.png
[https_github.com_ChenXbFrank_ssm_tree_devlop]: https://github.com/ChenXbFrank/ssm/tree/devlop/