Spring-data-redis集成redis的方法

Redis  /  管理员 发布于 7年前   389

Spring-data-redis是spring大家族的一部分，提供了在srping应用中通过简单的配置访问redis服务，对reids底层开发包(Jedis, JRedis, and RJC)进行了高度封装。

一、安装redis服务

1、下载安装redis服务，安装完成后会自动启动redis服务

sudo apt-get install redis-server

2、下载完成后，我们可以通过命令检查redis服务进程

ps -aux|grep redis

结果如下图所示：

3、也可以检查Redis服务的状态

netstat -nlt|grep 6379#结果如下：# tcp 0 0 127.0.0.1:6379 0.0.0.0:* LISTEN

4、通过命令检查redis服务状态

sudo /etc/init.d/redis-server status# 结果如下：redis-server is running

二、配置redis

# 编辑redis配置文件sudo vim /etc/redis/redis.conf# 在vim中设置redis访问密码requirepass 123456# 在vim中注释bind，设置允许远程访问，redis默认只允许本机访问#bind 127.0.0.1# 重启redis服务sudo /etc/init.d/redis-server restart# 客户端访问redis服务sudo redis-cli# 客户端登录并访问redis服务sudo redis-cli -a youpassword# 远程客户端登录并访问redis服务sudo redis-cli -a youpassword -h 192.168.1.22

三、编写java代码

1、cache接口定义

public interface Cache {    /**     * 添加     * @param key     * @param value     */    void put(Object key, Object value);        /**     * 得到key的值     * @param key     * @return     */    Object get(Object key);    /**     * 移除key     * @param key     * @return     */    Object remove(Object key);}

2、cache接口实现

import org.springframework.dao.DataAccessException;import org.springframework.data.redis.connection.RedisConnection;import org.springframework.data.redis.connection.RedisListCommands;import org.springframework.data.redis.connection.RedisStringCommands;import org.springframework.data.redis.connection.RedisZSetCommands;import org.springframework.data.redis.connection.jedis.JedisConverters;import org.springframework.data.redis.core.Cursor;import org.springframework.data.redis.core.RedisCallback;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.data.redis.core.ScanOptions;import org.springframework.data.redis.core.types.Expiration;import org.springframework.data.redis.serializer.RedisSerializer;import redis.clients.jedis.Jedis;public class DefaultRedisCache implements Cache {    private final static Logger logger = LoggerFactory.getLogger(DefaultRedisCache.class);    private RedisTemplate redisTemplate;    //秒    private final static Long DEFAULT_EXPIRE = 12 * 60 * 60L;    public DefaultRedisCache(RedisTemplate redisTemplate) {        this.redisTemplate = redisTemplate;    }    @Override    public void put(final Object key, final Object value) {        put(key, value, DEFAULT_EXPIRE);    }    @Override    public Object get(final Object key) {        return redisTemplate.execute(new RedisCallback() {@Overridepublic Object doInRedis(RedisConnection connection) throws DataAccessException {    RedisSerializer<Object> serializer = getRedisSerializer();    byte[] keyByte = serializer.serialize(key);    if(keyByte == null){        return null;    }    byte[] bytes = connection.get(keyByte);    if (bytes == null) {        return null;    }    return serializer.deserialize(bytes);}        });    }    @Override    public Object remove(final Object key) {        return redisTemplate.execute(new RedisCallback() {@Overridepublic Object doInRedis(RedisConnection connection) throws DataAccessException {    RedisSerializer<Object> serializer = getRedisSerializer();    if (key == null) {        return null;    }    byte[] bytes = serializer.serialize(key);    return connection.del(bytes);}        });    }

3、配置applicationContext-cache-test.xml文件

<?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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">    <context:property-placeholder location="classpath:redis-config.properties" ignore-unresolvable="true"/>    <!-- jedis pool配置 -->    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">        <property name="maxTotal" value="${commons.cache.redis.maxTotal}" />        <property name="maxIdle" value="${commons.cache.redis.maxIdle}" />        <property name="maxWaitMillis" value="${commons.cache.redis.maxWait}" />        <property name="testOnBorrow" value="${commons.cache.redis.testOnBorrow}" />        <property name="testOnReturn" value="${commons.cache.redis.testOnReturn}" />    </bean>    <!-- spring data redis -->    <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">        <property name="usePool" value="true"></property>        <property name="hostName" value="${commons.cache.redis.host}" />        <property name="port" value="${commons.cache.redis.port}" />        <property name="password" value="${commons.cache.redis.password}" />        <property name="timeout" value="${commons.cache.redis.timeout}" />        <!--<property name="database" value="${commons.cache.redis.default.db}"></property>-->        <property name="poolConfig" ref="jedisPoolConfig" />    </bean>    <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">        <property name="connectionFactory" ref="jedisConnectionFactory" />    </bean>        <!-- 自定义缓存工厂接口 -->    <bean id="cacheFactory" class="com.xxx.cache.factory.CacheFactory"  p:redisTemplate-ref="redisTemplate"/></beans>

4、配置redis-config.properties文件

# jedis pool配置commons.cache.redis.maxTotal=1000commons.cache.redis.maxIdle=600commons.cache.redis.maxWait=1000commons.cache.redis.testOnBorrow=truecommons.cache.redis.testOnReturn=true# spring data redis 配置commons.cache.redis.host=192.168.1.230commons.cache.redis.port=6379commons.cache.redis.password=123456commons.cache.redis.timeout=1000

5、测试

@ContextConfiguration(locations = {        "classpath:applicationContext-cache-test.xml"})@RunWith(SpringJUnit4ClassRunner.class)public class CacheTest extends BaseTest{    @Autowired    private Cache cache;    @Test    public void redisTest() {        // 添加key为username的值到redis缓存里        cache.put("username","nathan");        // 获取值        Object username = cache.get("username");        System.out.println("cache.get = " + username);        // 删除值//        cache.remove("username");//        Object delResult = cache.get("username");//        System.out.println("cache.remove = " + delResult);    }}

更多redis知识请关注redis入门教程栏目。

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