Redis工具类，不用框架时备用

redis.hostName=127.0.0.1
redis.port=6379
redis.database=3
redis.timeout=15000
redis.usePool=true
redis.maxWaitMillis=3000
redis.maxIdle=1000
redis.minEvictableIdleTimeMillis=300000
redis.numTestsPerEvictionRun=3
redis.timeBetweenEvictionRunsMillis=60000
redis.maxTotal=10

　　

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

public class RedisCacheUtil {

	private static Logger logger = LoggerFactory.getLogger(RedisCacheUtil.class);
	private final JedisPoolConfig cfg;
	private final JedisPool jedis_pool;

	private RedisCacheUtil() {
		cfg = getConfig();
		jedis_pool = getJedisPool();
	}

	private JedisPool getJedisPool() {
		String host = PropertiesUtil.getInstance().findPropVal("redis.hostName");
		int port = (int) PropertiesUtil.getInstance().findPropVal("redis.port", Integer.class);
		int timeout = (int) PropertiesUtil.getInstance().findPropVal("redis.timeout", Integer.class);
		int db=(int) PropertiesUtil.getInstance().findPropVal("redis.database", Integer.class);
		JedisPool pool = new JedisPool(cfg, host, port, timeout, null, db);
		return pool;
	}

	// private JedisConnectionFactory getJedisConnectionFactory() {
	// JedisConnectionFactory fac = new JedisConnectionFactory(cfg);
	// return fac;
	// }
	//
	// public ValueOperations<String, String> getOptionTool() {
	// JedisConnectionFactory fac = getJedisConnectionFactory();
	// RedisTemplate<String, String> tmp = new RedisTemplate<>();
	// tmp.setConnectionFactory(fac);
	// tmp.setKeySerializer(new StringRedisSerializer());
	// tmp.setValueSerializer(new StringRedisSerializer());
	// return tmp.opsForValue();
	// }
	//
	// public ValueOperations<String, Object> getOptionToolBinary() {
	// JedisConnectionFactory fac = getJedisConnectionFactory();
	// RedisTemplate<String, Object> tmp = new RedisTemplate<>();
	// tmp.setConnectionFactory(fac);
	// tmp.setKeySerializer(new StringRedisSerializer());
	// tmp.setValueSerializer(new GenericJackson2JsonRedisSerializer());
	// return tmp.opsForValue();
	// }

	private JedisPoolConfig getConfig() {
		JedisPoolConfig cfg = new JedisPoolConfig();
		int maxIdle = (int) PropertiesUtil.getInstance().findPropVal("redis.maxIdle", Integer.class);
		int minEvictableIdleTimeMillis = (int) PropertiesUtil.getInstance()
				.findPropVal("redis.minEvictableIdleTimeMillis", Integer.class);
		int numTestsPerEvictionRun = (int) PropertiesUtil.getInstance().findPropVal("redis.numTestsPerEvictionRun",
				Integer.class);
		int timeBetweenEvictionRunsMillis = (int) PropertiesUtil.getInstance()
				.findPropVal("redis.timeBetweenEvictionRunsMillis", Integer.class);
		long maxWaitMillis= (long) PropertiesUtil.getInstance()
				.findPropVal("redis.maxWaitMillis", Long.class);
		int maxTotal= (int) PropertiesUtil.getInstance()
				.findPropVal("redis.maxTotal", Integer.class);
		cfg.setMaxIdle(maxIdle);
		cfg.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
		cfg.setNumTestsPerEvictionRun(numTestsPerEvictionRun);
		cfg.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
		cfg.setMaxWaitMillis(maxWaitMillis);
		cfg.setMaxTotal(maxTotal);
		return cfg;
	}

	private static final RedisCacheUtil instance = new RedisCacheUtil();

	public static final RedisCacheUtil instance() {
		return instance;
	}

	/**
	 * 将数据写入内存
	 * 
	 * @param key
	 * @param val
	 */
	public void add(String key, String val) {
		Jedis jedis = jedis_pool.getResource();
		jedis.set(key, val);
		jedis.close();
	}

	/**
	 * 获取数据
	 * 
	 * @param key
	 * @param val
	 */
	public String get(String key) {
		Jedis jedis = jedis_pool.getResource();
		String tmp = jedis.get(key);
		jedis.close();
		
		if (tmp == null) {
			tmp = "";
		}
		return tmp;
	}

	/**
	 * 将内存数据写入磁盘，恢复时或者重启服务自动加载
	 */
	public void writeToDB() {
		Jedis jedis = jedis_pool.getResource();
		jedis.save();
		jedis.close();
	}

	/**
	 * 追加内容
	 * 
	 * @param key
	 * @param val
	 */
	public void append(String key, String val) {
		Jedis jedis = jedis_pool.getResource();
		jedis.append(key, val);
		jedis.close();
	}

	/**
	 * 删除key，删除内存中的数据
	 * 
	 * @param key
	 */
	public void del(String key) {
		Jedis jedis = jedis_pool.getResource();
		jedis.del(key);
		jedis.close();
	}

	/**
	 * 取除内存数据,将其转换为jsonArray
	 * 
	 * @param key
	 * @return
	 */
	public JSONArray getJSONArray(String key) {
		Jedis jedis = jedis_pool.getResource();
		String val = jedis.get(key);
		jedis.close();
		
		if (val == null || val.trim().length() == 0) {
			return new JSONArray();
		} else {
			try {
				return JSONObject.parseObject(val).getJSONArray("data");
			} catch (Exception e) {
				logger.error(e.getMessage());
				return JSONArray.parseArray(val);
			}
		}
	}
}