redis简单配置

Posted 2020-10-13

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redis的使用十分简单，这次以jedis(shardedJedisPool)为例:

(1).导入相应jar包

<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.9.0</version>
</dependency>

(2).使用spring整合redis

<?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">


    <!--shardedJedisPool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>200</value>
        </property>
        <property name="maxIdle">
            <value>50</value>
        </property>
        <property name="testOnBorrow" value="true"/>
        <property name="testOnReturn" value="true"/>
    </bean>

    <bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool"  scope="singleton">
        <constructor-arg index="0" ref="jedisPoolConfig" />
        <constructor-arg index="1">
            <list>
                <bean class="redis.clients.jedis.JedisShardInfo">
                    <constructor-arg name="host" value="redis://:[email protected]:6379/0" />
                </bean>
            </list>
        </constructor-arg>
    </bean>
</beans>

(3).创建统一类来管理Redis实例

package com.btc.reids;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;

@Repository("jedisDS")
public class RedisDataSource {
    
    private static final Logger LOG = LoggerFactory.getLogger(RedisDataSource.class);

    @Autowired
    private ShardedJedisPool shardedJedisPool;

    public ShardedJedis getRedisClient() {
        ShardedJedis shardJedis = null;
        try {
            shardJedis = shardedJedisPool.getResource();
            return shardJedis;
        } catch (Exception e) {
            LOG.error("[JedisDS] getRedisClent error:" + e.getMessage());
            if (null != shardJedis)
                shardJedis.close();
        }
        return null;
    }

    public void returnResource(ShardedJedis shardedJedis) {
        shardedJedis.close();
    }

    public void returnResource(ShardedJedis shardedJedis, boolean broken) {
        shardedJedis.close();
    }

}
(4).编写实现操作的具体方法

package com.btc.reids;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import redis.clients.jedis.ShardedJedis;

@Repository("redisClient")
public class RedisClient {
    private static final Logger log = LoggerFactory.getLogger(RedisClient.class);

    @Autowired
    private RedisDataSource redisDataSource;

    public void disconnect() {
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        shardedJedis.disconnect();
    }

    /**
     * 设置单个值
     * 
     * @param key
     * @param value
     * @return
     */
    public String set(String key, String value) {
        String result = null;

        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.set(key, value);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    /**
     * 获取单个值
     * 
     * @param key
     * @return
     */
    public String get(String key) {
        String result = null;
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        if (shardedJedis == null) {
            return result;
        }

        boolean broken = false;
        try {
            result = shardedJedis.get(key);

        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    public Boolean exists(String key) {
        Boolean result = false;
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.exists(key);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    public String type(String key) {
        String result = null;
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.type(key);

        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    /**
     * 在某段时间后失效
     * 
     * @param key
     * @param seconds
     * @return
     */
    public Long expire(String key, int seconds) {
        Long result = null;
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.expire(key, seconds);

        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    /**
     * 在某个时间点失效
     * 
     * @param key
     * @param unixTime
     * @return
     */
    public Long expireAt(String key, long unixTime) {
        Long result = null;
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.expireAt(key, unixTime);

        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    public Long ttl(String key) {
        Long result = null;
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.ttl(key);

        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    public boolean setbit(String key, long offset, boolean value) {

        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        boolean result = false;
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.setbit(key, offset, value);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    public boolean getbit(String key, long offset) {
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        boolean result = false;
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;

        try {
            result = shardedJedis.getbit(key, offset);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    public long setRange(String key, long offset, String value) {
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        long result = 0;
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.setrange(key, offset, value);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }

    public String getRange(String key, long startOffset, long endOffset) {
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        String result = null;
        if (shardedJedis == null) {
            return result;
        }
        boolean broken = false;
        try {
            result = shardedJedis.getrange(key, startOffset, endOffset);

        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }
    
    public boolean del(String key){
        boolean result = false;
        ShardedJedis shardedJedis = redisDataSource.getRedisClient();
        if (shardedJedis == null) {
            return result;
        }

        boolean broken = false;
        try {
             shardedJedis.del(key);
             result =true;

        } catch (Exception e) {
            log.error(e.getMessage(), e);
            broken = true;
        } finally {
            redisDataSource.returnResource(shardedJedis, broken);
        }
        return result;
    }
}
到此redis的配置就已经完成了。
下面写个简单类来测试一下：

package com.btc.controller.pcweb;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.btc.reids.RedisClient;
import com.btc.service.manage.HelloService;

import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;

@Controller
public class helloTest {
    
    
    @Autowired
    private RedisClient redisClient;


    @RequestMapping(value = "/demo_set",method = RequestMethod.GET)
    @ResponseBody
    public String demo_set(String key,String value){
        //存入键值对
        redisClient.set(key,value);

        return "set";
    }

    @RequestMapping(value = "/demo_get",method = RequestMethod.GET)
    @ResponseBody
    public String demo_get(String key){
        //根据键值获得数据
        String result = redisClient.get(key);
        return result;
    }
}

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