如何使用redis的java客户端

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首先需要使用Jedis连接redis服务器。

1.连接单机版

先把jedis依赖的jar包添加到工程中。

//单机版测试

@Test

publicvoid testJedisSingle() throws Exception {

//创建一个Jedis对象

Jedis jedis = new Jedis("192.168.25.153", 6379);

jedis.set("test", "hello jedis");

String string = jedis.get("test");

System.out.println(string);

jedis.close();

}

使用连接池：

//使用连接池

@Test

publicvoid testJedisPool() throws Exception {

//创建一个连接池对象

//系统中应该是单例的。

JedisPool jedisPool = new JedisPool("192.168.25.153", 6379);

//从连接池中获得一个连接

Jedis jedis = jedisPool.getResource();

String result = jedis.get("test");

System.out.println(result);

//jedis必须关闭

jedis.close();

//系统关闭时关闭连接池

jedisPool.close();

}

2. 集群版使用Jedis

//连接redis集群

@Test

publicvoid testJedisCluster() throws Exception {

//创建一个JedisCluster对象

Set<HostAndPort>nodes = new HashSet<>();

nodes.add(new HostAndPort("192.168.25.153", 7001));

nodes.add(new HostAndPort("192.168.25.153", 7002));

nodes.add(new HostAndPort("192.168.25.153", 7003));

nodes.add(new HostAndPort("192.168.25.153", 7004));

nodes.add(new HostAndPort("192.168.25.153", 7005));

nodes.add(new HostAndPort("192.168.25.153", 7006));

//在nodes中指定每个节点的地址

//jedisCluster在系统中是单例的。

JedisCluster jedisCluster = new JedisCluster(nodes);

jedisCluster.set("name", "zhangsan");

jedisCluster.set("value", "100");

String name = jedisCluster.get("name");

String value = jedisCluster.get("value");

System.out.println(name);

System.out.println(value);

//系统关闭时关闭jedisCluster

jedisCluster.close();

}

1.1 项目中使用jedis

思路：创建一个redis操作的接口。分别创建两个实现类对应redis 的单机版和集群版。当使用单机版redis时，配置单机版的实现类，当使用集群版本的时候，配置集群版的实现类。

1.1.1 单机版实现类

/**

* redis客户端单机版实现类

publicclass JedisClientSingle implements JedisClient{

@Autowired

private JedisPooljedisPool;

@Override

public String set(Stringkey, String value) {

Jedis jedis = jedisPool.getResource();

String result = jedis.set(key,value);

jedis.close();

returnresult;

}

@Override

public String get(Stringkey) {

Jedis jedis = jedisPool.getResource();

String result = jedis.get(key);

jedis.close();

returnresult;

}

@Override

public Long hset(Stringkey, String item, Stringvalue) {

Jedis jedis = jedisPool.getResource();

Long result = jedis.hset(key,item, value);

jedis.close();

returnresult;

}

@Override

public String hget(Stringkey, String item) {

Jedis jedis = jedisPool.getResource();

String result = jedis.hget(key,item);

jedis.close();

returnresult;

}

@Override

public Long incr(Stringkey) {

Jedis jedis = jedisPool.getResource();

Long result = jedis.incr(key);

jedis.close();

returnresult;

}

@Override

public Long decr(Stringkey) {

Jedis jedis = jedisPool.getResource();

Long result = jedis.decr(key);

jedis.close();

returnresult;

}

@Override

public Long expire(Stringkey, intsecond) {

Jedis jedis = jedisPool.getResource();

Long result = jedis.expire(key,second);

jedis.close();

returnresult;

}

@Override

public Long ttl(Stringkey) {

Jedis jedis = jedisPool.getResource();

Long result = jedis.ttl(key);

jedis.close();

returnresult;

}

1.1.2 集群版

/**

* redis客户端集群版实现类

**/

publicclass JedisClientCluster implements JedisClient {

@Autowired

private JedisClusterjedisCluster;

@Override

public String set(Stringkey, String value) {

returnjedisCluster.set(key,value);

}

@Override

public String get(Stringkey) {

returnjedisCluster.get(key);

}

@Override

public Long hset(Stringkey, String item, Stringvalue) {

returnjedisCluster.hset(key,item, value);

}

@Override

public String hget(Stringkey, String item) {

returnjedisCluster.hget(key,item);

}

@Override

public Long incr(Stringkey) {

returnjedisCluster.incr(key);

}

@Override

public Long decr(Stringkey) {

returnjedisCluster.decr(key);

}

@Override

public Long expire(Stringkey, intsecond) {

returnjedisCluster.expire(key,second);

}

@Override

public Long ttl(Stringkey) {

returnjedisCluster.ttl(key);

}

1.1.3 Spring的配置

<?xmlversion="1.0"encoding="UTF-8"?>

<beansxmlns="http://www.springframework.org/schema/beans"

xmlns:context="http://www.springframework.org/schema/context"xmlns:p="http://www.springframework.org/schema/p"

xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd

http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd

http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd

http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

<context:component-scanbase-package="com.taotao.rest.service"></context:component-scan>

<constructor-argname="host"value="192.168.25.153"></constructor-arg>

<constructor-argname="port"value="6379"></constructor-arg>

</bean>

<!-- <bean id="jedisCluster" class="redis.clients.jedis.JedisCluster">

<constructor-arg>

<set>

<constructor-arg name="host" value="192.168.25.153"/>

<constructor-arg name="port" value="7001"/>

</bean>

<constructor-arg name="host" value="192.168.25.153"/>

<constructor-arg name="port" value="7002"/>

</bean>

<constructor-arg name="host" value="192.168.25.153"/>

<constructor-arg name="port" value="7003"/>

</bean>

<constructor-arg name="host" value="192.168.25.153"/>

<constructor-arg name="port" value="7004"/>

</bean>

<constructor-arg name="host" value="192.168.25.153"/>

<constructor-arg name="port" value="7005"/>

</bean>

<constructor-arg name="host" value="192.168.25.153"/>

<constructor-arg name="port" value="7006"/>

</bean>

</set>

</constructor-arg>

</bean>

</beans>

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