redis 单实例使用及简单封装

如何安装redis不作讲解，增长pom依赖

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

1.配置文件  redisSimple.properties

redis.ip=127.0.0.1
redis.port=6379
#最大链接数
redis.max.total=20

#最大空闲数
redis.max.idle=10

#最小空闲数
redis.min.idle=2

#从jedis链接池获取链接时，校验并返回可用的链接
redis.test.borrow=true

#把链接放回jedis链接池时，校验并返回可用的链接
redis.test.return=false

 

2.读取配置文件类：在集群里有讲解，再也不赘述

3.单实例链接池：

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
public class RedisPool {
    private static JedisPool pool;//jedis链接池
    private static Integer maxTotal = Integer.parseInt(PropertiesUtil.getProperty("redis.max.total","20")); //最大链接数
    private static Integer maxIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.max.idle","20"));//在jedispool中最大的idle状态(空闲的)的jedis实例的个数
    private static Integer minIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.min.idle","20"));//在jedispool中最小的idle状态(空闲的)的jedis实例的个数

    private static Boolean testOnBorrow = Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.borrow","true"));//在borrow一个jedis实例的时候，是否要进行验证操做，若是赋值true。则获得的jedis实例确定是能够用的。
    private static Boolean testOnReturn = Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.return","true"));//在return一个jedis实例的时候，是否要进行验证操做，若是赋值true。则放回jedispool的jedis实例确定是能够用的。

    private static String redisIp = PropertiesUtil.getProperty("redis.ip");
    private static Integer redisPort = Integer.parseInt(PropertiesUtil.getProperty("redis.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);//链接耗尽的时候，是否阻塞，false会抛出异常，true阻塞直到超时。默认为true。
        pool = new JedisPool(config,redisIp,redisPort,1000*2);
    }
    static{
        initPool();
    }
    public static Jedis getJedis(){
        return pool.getResource();
    }
    public static void returnBrokenResource(Jedis jedis){
        pool.returnBrokenResource(jedis);
    }
    public static void returnResource(Jedis jedis){
        pool.returnResource(jedis);
    }
    public static void main(String[] args) {
        Jedis jedis = pool.getResource();
        jedis.set("geelykey","geelyvalue");
        returnResource(jedis);
        pool.destroy();//临时调用，销毁链接池中的全部链接
        System.out.println("program is end");


    }

4，简单工具类

import RedisPool;
import lombok.extern.slf4j.Slf4j;
import redis.clients.jedis.Jedis;
@Slf4j
public class RedisPoolUtil {
    /**
     * 设置key的有效期，单位是秒
     * @param key
     * @param exTime
     * @return
     */
    public static Long expire(String key,int exTime){
        Jedis jedis = null;
        Long result = null;
        try {
            jedis = RedisPool.getJedis();
            result = jedis.expire(key,exTime);
        } catch (Exception e) {
            log.error("expire key:{} error",key,e);
            RedisPool.returnBrokenResource(jedis);
            return result;
        }
        RedisPool.returnResource(jedis);
        return result;
    }
    //exTime的单位是秒
    public static String setEx(String key,String value,int exTime){
        Jedis jedis = null;
        String result = null;
        try {
            jedis = RedisPool.getJedis();
            result = jedis.setex(key,exTime,value);
        } catch (Exception e) {
            log.error("setex key:{} value:{} error",key,value,e);
            RedisPool.returnBrokenResource(jedis);
            return result;
        }
        RedisPool.returnResource(jedis);
        return result;
    }
    public static String set(String key,String value){
        Jedis jedis = null;
        String result = null;

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

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

    public static Long del(String key){
        Jedis jedis = null;
        Long result = null;
        try {
            jedis = RedisPool.getJedis();
            result = jedis.del(key);
        } catch (Exception e) {
            log.error("del key:{} error",key,e);
            RedisPool.returnBrokenResource(jedis);
            return result;
        }
        RedisPool.returnResource(jedis);
        return result;
    }
//简单测试
    public static void main(String[] args) {
        Jedis jedis = RedisPool.getJedis();

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

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

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

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

        RedisShardedPoolUtil.del("keyTest");
        String aaa = RedisShardedPoolUtil.get(null);
        System.out.println(aaa);

        System.out.println("end");


    }


}