spring 項目中redis多實例入門及簡單封裝

1.引入依賴

<dependency>
  <groupId>redis.clients</groupId>
  <artifactId>jedis</artifactId>
  <version>2.6.0</version>
</dependency>

2.配置鏈接屬性創建 redis.properties 文件

redis1.ip=127.0.0.1//你的redis集羣IP
redis1.port=6379//端口，有密碼的須要配置密碼
redis2.ip=127.0.0.1
redis2.port=6380
#最大鏈接數
redis.max.total=20
#最大空閒數
redis.max.idle=10
#最小空閒數
redis.min.idle=2
#從jedis鏈接池獲取鏈接時，校驗並返回可用的鏈接
redis.test.borrow=true
#把鏈接放回jedis鏈接池時，校驗並返回可用的鏈接
redis.test.return=false

3.讀取配置文件類 新建PropertiesUtil.java  記得導入包哦

public class PropertiesUtil {
    private static Properties props;
    static {
        String fileName = "redis.properties";
        props = new Properties();
        try {
            props.load(new InputStreamReader(PropertiesUtil.class.getClassLoader().getResourceAsStream(fileName),"UTF-8"));
        } catch (IOException e) {
            log.error("配置文件讀取異常",e);
        }
    }
    public static String getProperty(String key){
        String value = props.getProperty(key.trim());
        if(StringUtils.isBlank(value)){
            return null;
        }
        return value.trim();
    }

    public static String getProperty(String key,String defaultValue){

        String value = props.getProperty(key.trim());
        if(StringUtils.isBlank(value)){
            value = defaultValue;
        }
        return value.trim();
    }



}

4.建立鏈接池類RedisShardPool.java 記得導入你的配置文件類

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.JedisShardInfo;
import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;
import redis.clients.util.Hashing;
import redis.clients.util.Sharded;
import java.util.ArrayList;
import java.util.List;
public class RedisShardedPool {
    private static ShardedJedisPool pool;//sharded jedis鏈接池
    private static Integer maxTotal = Integer.parseInt(PropertiesUtil.getProperty("redis.max.total","20")); //最大鏈接數
    private static Integer maxIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.max.idle","20"));//在jedispool中最大的idle狀態(空閒的)的jedis實例的個數
    private static Integer minIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.min.idle","20"));//在jedispool中最小的idle狀態(空閒的)的jedis實例的個數

    private static Boolean testOnBorrow = Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.borrow","true"));//在borrow一個jedis實例的時候，是否要進行驗證操做，若是賦值true。則獲得的jedis實例確定是能夠用的。
    private static Boolean testOnReturn = Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.return","true"));//在return一個jedis實例的時候，是否要進行驗證操做，若是賦值true。則放回jedispool的jedis實例確定是能夠用的。

    private static String redis1Ip = PropertiesUtil.getProperty("redis1.ip");
    private static Integer redis1Port = Integer.parseInt(PropertiesUtil.getProperty("redis1.port"));
    private static String redis2Ip = PropertiesUtil.getProperty("redis2.ip");
    private static Integer redis2Port = Integer.parseInt(PropertiesUtil.getProperty("redis2.port"));
    private static void initPool(){
        JedisPoolConfig config = new JedisPoolConfig();

        config.setMaxTotal(maxTotal);
        config.setMaxIdle(maxIdle);
        config.setMinIdle(minIdle);

        config.setTestOnBorrow(testOnBorrow);
        config.setTestOnReturn(testOnReturn);

        config.setBlockWhenExhausted(true);//鏈接耗盡的時候，是否阻塞，false會拋出異常，true阻塞直到超時。默認爲true。

        JedisShardInfo info1 = new JedisShardInfo(redis1Ip,redis1Port,1000*2);

        JedisShardInfo info2 = new JedisShardInfo(redis2Ip,redis2Port,1000*2);

        List<JedisShardInfo> jedisShardInfoList = new ArrayList<JedisShardInfo>(2);

        jedisShardInfoList.add(info1);
        jedisShardInfoList.add(info2);

        pool = new ShardedJedisPool(config,jedisShardInfoList, Hashing.MURMUR_HASH, Sharded.DEFAULT_KEY_TAG_PATTERN);
    }

    static{
        initPool();
    }

    public static ShardedJedis getJedis(){
        return pool.getResource();
    }


    public static void returnBrokenResource(ShardedJedis jedis){
        pool.returnBrokenResource(jedis);
    }



    public static void returnResource(ShardedJedis jedis){
        pool.returnResource(jedis);
    }

//簡單測試，可刪除
    public static void main(String[] args) {
        ShardedJedis jedis = pool.getResource();

        for(int i =0;i<10;i++){
            jedis.set("key"+i,"value"+i);
        }
        returnResource(jedis);

//        pool.destroy();//臨時調用，銷燬鏈接池中的全部鏈接
        System.out.println("program is end");


    }
}

5.簡單工具類 RedisShardedPoolUtil.java

import RedisShardedPool;//你的鏈接池
import lombok.extern.slf4j.Slf4j;
import redis.clients.jedis.ShardedJedis;
@Slf4j
public class RedisShardedPoolUtil {
    /**
     * 設置key的有效期，單位是秒
     * @param key
     * @param exTime
     * @return
     */
   public static Long expire(String key,int exTime){
        ShardedJedis jedis = null;
        Long result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.expire(key,exTime);
        } catch (Exception e) {
            log.error("expire key:{} error",key,e);
            RedisShardedPool.returnBrokenResource(jedis);
            return result;
        }
        RedisShardedPool.returnResource(jedis);
        return result;
    }

    //exTime的單位是秒
    public static String setEx(String key,String value,int exTime){
        ShardedJedis jedis = null;
        String result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.setex(key,exTime,value);
        } catch (Exception e) {
            log.error("setex key:{} value:{} error",key,value,e);
            RedisShardedPool.returnBrokenResource(jedis);
            return result;
        }
        RedisShardedPool.returnResource(jedis);
        return result;
    }

    public static String set(String key,String value){
        ShardedJedis jedis = null;
        String result = null;

        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.set(key,value);
        } catch (Exception e) {
            log.error("set key:{} value:{} error",key,value,e);
            RedisShardedPool.returnBrokenResource(jedis);
            return result;
        }
        RedisShardedPool.returnResource(jedis);
        return result;
    }

    public static String get(String key){
        ShardedJedis jedis = null;
        String result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.get(key);
        } catch (Exception e) {
            log.error("get key:{} error",key,e);
            RedisShardedPool.returnBrokenResource(jedis);
            return result;
        }
        RedisShardedPool.returnResource(jedis);
        return result;
    }

    public static Long del(String key){
        ShardedJedis jedis = null;
        Long result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.del(key);
        } catch (Exception e) {
            log.error("del key:{} error",key,e);
            RedisShardedPool.returnBrokenResource(jedis);
            return result;
        }
        RedisShardedPool.returnResource(jedis);
        return result;
    }


    public static String getSet(String key,String value) {
        ShardedJedis jedis = null;
        String result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.getSet(key,value);
        } catch (Exception e) {
            log.error("getset key:{} error", key, e);
            RedisShardedPool.returnBrokenResource(jedis);
            return result;
        }
        RedisShardedPool.returnResource(jedis);
        return result;
    }

    public static Long setnx(String key, String value) {
        ShardedJedis jedis = null;
        Long result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.setnx(key, value);
        } catch (Exception e) {
            log.error("setnx key:{} value:{} error", key, value, e);
            RedisShardedPool.returnBrokenResource(jedis);
            return result;
        }
        RedisShardedPool.returnResource(jedis);
        return result;
    }

//簡單測試，可刪除
    public static void main(String[] args) {
        ShardedJedis jedis = RedisShardedPool.getJedis();

        RedisPoolUtil.set("keyTest","value");

        String value = RedisPoolUtil.get("keyTest");

        RedisPoolUtil.setEx("keyex","valueex",60*10);

        RedisPoolUtil.expire("keyTest",60*20);

        RedisPoolUtil.del("keyTest");


        String aaa = RedisPoolUtil.get(null);
        System.out.println(aaa);

        System.out.println("end");


    }



}