SSM 整合之Redis

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_40369944/article/details/84258818

ssm整合：https://blog.csdn.net/qq_40369944/article/details/84256767

1.导入依赖

<spring.redis.version>1.6.0.RELEASE</spring.redis.version>
    <jedis.version>2.7.2</jedis.version>
    <commons.version>2.4.2</commons.version>



<!-- config redis data and client jar-->
    <dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-redis</artifactId>
      <version>${spring.redis.version}</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-pool2 -->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-pool2</artifactId>
      <version>${commons.version}</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
    <dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
      <version>${jedis.version}</version>
    </dependency>

2.在resources中创建redis.properties

redis.host=47.106.8.233
redis.port=6379
redis.password=

redis.maxIdle=300
redis.maxWaitMillis=1000
redis.maxTotal=600
redis.testOnBorrow=true
redis.testOnReturn=true

3.在resources中创建redis-context.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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd">
    <!--扫描redis配置文件-->
    <context:property-placeholder ignore-unresolvable="true" location="classpath:redis.properties"/>
    <!--设置连接池-->
    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxIdle" value="${redis.maxIdle}"/>
        <property name="maxTotal" value="${redis.maxTotal}" />
        <property name="maxWaitMillis" value="${redis.maxWaitMillis}" />
        <property name="testOnBorrow" value="${redis.testOnBorrow}" />
        <property name="testOnReturn" value="${redis.testOnReturn}" />
    </bean>
    <!--设置链接属性-->
    <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
          p:hostName="${redis.host}"
          p:port="${redis.port}"
          p:password="${redis.password}"
          p:pool-config-ref="poolConfig"
          p:timeout="100000"/>
    <!-- Jedis模板配置  -->
    <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
        <property name="connectionFactory"   ref="connectionFactory" />
    </bean>

</beans>

4.在Spring.xml中引入配置

<!-- 引入redis配置文件 -->
    <import resource="classpath:redis-context.xml"/>

5.创建RedisUtil

@Component
public class RedisUtil {
    @Autowired
    private RedisTemplate redisTemplate;

    
    /**
     * 删除对应的value
     *
     * @param key
     */
    public void remove(final String key) {
        if (exists(key)) {
            redisTemplate.delete(key);
        }
    }

    /**
     * 判断缓存中是否有对应的value
     *
     * @param key
     * @return
     */
    public boolean exists(final String key) {
        return redisTemplate.hasKey(key);
    }

    /**
     * 读取缓存
     *
     * @param key
     * @return
     */
    public Object get(final String key) {
        Object result = null;
        ValueOperations<Serializable, Object> operations = redisTemplate
                .opsForValue();
        result = operations.get(key);
        return result;
    }

    /**
     * 写入缓存
     *
     * @param key
     * @param value
     * @return
     */
    public boolean set(final String key, Object value) {
        boolean result = false;
        try {
            ValueOperations<Serializable, Object> operations = redisTemplate
                    .opsForValue();
            operations.set(key, value);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 写入缓存
     *
     * @param key
     * @param value
     * @return
     */
    public boolean set(final String key, Object value, Long expireTime) {
        boolean result = false;
        try {
            ValueOperations<Serializable, Object> operations = redisTemplate
                    .opsForValue();
            operations.set(key, value);
            redisTemplate.expire(key, expireTime, TimeUnit.SECONDS);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
    
}

6.创建controller

@Controller
@RequestMapping("/index")
public class indexController {

    @Resource
    private RedisUtil redisUtil;

    @RequestMapping("/a")
    @ResponseBody
    public String index(){
        redisUtil.set("aa","123");
        System.out.println( redisUtil.get("aa"));

        return "Hello";
    }
}

7.创建index.jsp

<a href="/index/a.do">redis</a>

 

8.测试

8.1运行界面

8.2 结果

控制台输出：

界面显示：