spring集成jedis简单实例
jedis是redis的java客户端,spring将redis连接池作为一个bean配置。
“redis.clients.jedis.JedisPool”,这是单机环境适用的redis连接池。
1、maven导入相关包:
<!-- redis依赖包 --> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.9.0</version> </dependency>
2、下面是单机环境下redis连接池的配置:
<?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"
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">
<!-- 引入jedis的properties配置文件 -->
<!--如果你有多个数据源需要通过<context:property-placeholder管理,且不愿意放在一个配置文件里,那么一定要加上ignore-unresolvable=“true"-->
<context:property-placeholder location="classpath:properties/redis.properties" ignore-unresolvable="true" />
<!--Jedis连接池的相关配置-->
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<!--新版是maxTotal,旧版是maxActive-->
<property name="maxTotal">
<value>${redis.pool.maxActive}</value>
</property>
<property name="maxIdle">
<value>${redis.pool.maxIdle}</value>
</property>
<property name="testOnBorrow" value="true"/>
<property name="testOnReturn" value="true"/>
</bean>
<bean id="jedisPool" class="redis.clients.jedis.JedisPool">
<constructor-arg name="poolConfig" ref="jedisPoolConfig" />
<constructor-arg name="host" value="${redis.host}" />
<constructor-arg name="port" value="${redis.port}" type="int" />
<constructor-arg name="timeout" value="${redis.timeout}" type="int" />
<constructor-arg name="password" value="${redis.password}" />
<constructor-arg name="database" value="${redis.database}" type="int" />
</bean>
</beans>
3、对应的classpath:properties/redis.properties.xml为:
#最大分配的对象数 redis.pool.maxActive=200 #最大能够保持idel状态的对象数 redis.pool.maxIdle=50 redis.pool.minIdle=10 redis.pool.maxWaitMillis=20000 #当池内没有返回对象时,最大等待时间 redis.pool.maxWait=300 #格式:redis://:[密码]@[服务器地址]:[端口]/[db index] redis.uri = redis://:12345@127.0.0.1:6379/0 redis.host = 127.0.0.1 redis.port = 6379 redis.timeout=30000 redis.password = 12345 redis.database = 0
4、RedisUtil
package com.ctid.business.redis.util;
import javax.annotation.Resource;
import org.springframework.stereotype.Component;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
@Component
public class RedisUtil {
@Resource
private JedisPool jedisPool;// 注入JedisPool
public String get(String key) {// 获取指定 key 的值。如果 key 不存在,返回 nil
Jedis jedis = jedisPool.getResource();
String string = jedis.get(key);
jedis.close();
return string;
}
public String set(String key, String value) {// 设置一些字符串值
Jedis jedis = jedisPool.getResource();
String string = jedis.set(key, value);
jedis.close();
return string;
}
public String hget(String hkey, String key) {// 获取哈希表中指定字段的值
Jedis jedis = jedisPool.getResource();
String string = jedis.hget(hkey, key);
jedis.close();
return string;
}
public long hset(String hkey, String key, String value) {// 为哈希表中的字段赋值
Jedis jedis = jedisPool.getResource();
long result = jedis.hset(hkey, key, value);
jedis.close();
return result;
}
public long incr(String key) {// 将 key 中储存的数字值增一,如果 key 不存在,那么 key 的值会先被初始化为
// 0 ,然后再执行INCR操作
Jedis jedis = jedisPool.getResource();
long result = jedis.incr(key);
jedis.close();
return result;
}
public long expire(String key, int second) {// 设置key的到期时间
Jedis jedis = jedisPool.getResource();
long result = jedis.expire(key, second);
jedis.close();
return result;
}
public long ttl(String key) {// 以秒为单位返回 key 的剩余过期时间
Jedis jedis = jedisPool.getResource();
long result = jedis.ttl(key);
jedis.close();
return result;
}
public long del(String key) {// 根据key删除
Jedis jedis = jedisPool.getResource();
long result = jedis.del(key);
jedis.close();
return result;
}
public long hdel(String hkey, String key) {// 删除哈希表key中的一个或多个指定字段
Jedis jedis = jedisPool.getResource();
long result = jedis.hdel(hkey, key);
jedis.close();
return result;
}
}
5、redisUtil调用
package com.ctid.business.redis.testIpv6;
import javax.annotation.Resource;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Service;
import com.ctid.business.redis.util.RedisUtil;
@Service
public class TestIpv6 {
private static final Log LOGGER = LogFactory.getLog(TestIpv6.class);
@Resource
private RedisUtil redisUtil;
public void testIpv6() {
LOGGER.info("redis======================================");
String result1 = redisUtil.set("test", "1111");
LOGGER.info("redis设置值:" + result1);
String result2 = redisUtil.get("test");
LOGGER.info("redis查询值:" + result2);
}
}