ssm开发使用redis作为缓存的使用步骤

<!-- redis配置 -->
 <bean id=\"jedisPoolConfig\" class=\"redis.clients.jedis.JedisPoolConfig\">
  <!-- <property name=\"maxActive\" value=\"90\"/> -->
  <property name=\"maxIdle\" value=\"5\"/>
  <!-- <property name=\"maxWait\" value=\"1000\"/> -->
  <property name=\"testOnBorrow\" value=\"true\"/>
 </bean>
　　　　<!--配置redis数据源-->
 <bean id=\"jedisPool\" class=\"redis.clients.jedis.JedisPool\" destroy-method=\"destroy\">
  <constructor-arg ref=\"jedisPoolConfig\"/>
  <constructor-arg value=\"192.168.21.195\"/>
  <constructor-arg value=\"6379\"/>
 </bean>
　　　　<!--配置自定义的RedisAPI工具类-->
 <bean id=\"redisAPI\" class=\"org.slsale.common.RedisAPI\">
  <property name=\"jedisPool\" ref=\"jedisPool\"/>
 </bean>

package org.slsale.common;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

/**
 * jedisAPI
 * @author luzhewu
 *
 */
public class RedisAPI {
 public JedisPool jedisPool;// redis连接池对象

 public JedisPool getJedisPool() {
  return jedisPool;
 }

 public void setJedisPool(JedisPool jedisPool) {
  this.jedisPool = jedisPool;
 }

 /**
  * set key and value tp redis
  * @param key
  * @param value
  * @return
  */
 public boolean set(String key, String value) {
  Jedis jedis = null;
  try {
   jedis = jedisPool.getResource();// 获取jedis对象
   jedis.set(key, value);
   return true;
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   // 返还到连接池
   returnResource(jedisPool, jedis);
  }
  return false;
 }

 /**
  * 判断某个key是否存在
  * @param key
  * @return
  */
 public boolean exist(String key) {
  Jedis jedis = null;
  try {
   jedis = jedisPool.getResource();
   return jedis.exists(key);
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   // 返还到连接池
   returnResource(jedisPool, jedis);
  }
  return false;
 }

 /**
  * 通过key获取value
  * @param key
  * @return
  */
 public String get(String key) {
  String value = null;
  Jedis jedis = null;
  try {
   jedis = jedisPool.getResource();
   value = jedis.get(key);
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   // 返还到连接池
   returnResource(jedisPool, jedis);
  }
  return value;
 }

 /**
  * 返还到连接池
  * @param jedisPool
  * @param jedis
  */
 public static void returnResource(JedisPool jedisPool, Jedis jedis) {
  if (jedis != null) {
   jedisPool.returnResource(jedis);
  }
 }
}

<!-- redis相关依赖jedis -->
   <dependency>
 <groupId>redis.clients</groupId>
 <artifactId>jedis</artifactId>
 <version>2.6.1</version>