redis.pool redispool.setString

/**
 * @类描述 redis 工具
 * @功能名 POJO
 * @author zxf
 * @date 2014年11月25日
 */
public final class RedisUtil {	private static JedisPool jedisPool = null;
    /**
     * 初始化Redis连接池
     */
    static {
        try {
        	//加载redis配置文件
    	    ResourceBundle bundle = ResourceBundle.getBundle("redis");  
    	    if (bundle == null) {  
    	        throw new IllegalArgumentException("[redis.properties] is not found!");  
    	    } 
    	    int maxActivity = Integer.valueOf(bundle.getString("redis.pool.maxActive"));
    	    int maxIdle = Integer.valueOf(bundle.getString("redis.pool.maxIdle"));
    	    long maxWait = Long.valueOf(bundle.getString("redis.pool.maxWait"));
    	    boolean testOnBorrow = Boolean.valueOf(bundle.getString("redis.pool.testOnBorrow"));
    	    boolean onreturn = Boolean.valueOf(bundle.getString("redis.pool.testOnReturn"));

    		//创建jedis池配置实例
            JedisPoolConfig config = new JedisPoolConfig();
            //设置池配置项值
    	    config.setMaxActive(maxActivity);
    	    config.setMaxIdle(maxIdle);  
    	    config.setMaxWait(maxWait);  
    	    config.setTestOnBorrow(testOnBorrow);  
    	    config.setTestOnReturn(onreturn);  
    	    jedisPool = new JedisPool(config, bundle.getString("redis.ip"), Integer.valueOf(bundle.getString("redis.port")));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取Jedis实例
     * @return
     */
    public synchronized static Jedis getJedis() {
        try {
            if (jedisPool != null) {
                Jedis resource = jedisPool.getResource();
                return resource;
            } else {
                return null;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 释放jedis资源
     * @param jedis
     */
    public static void returnResource(final Jedis jedis) {
        if (jedis != null) {
            jedisPool.returnResource(jedis);
        }
    }	/**
	 * 查询数据
	 */
	public String  find(String key,String value){
		Jedis jedis = null;
		try {
			jedis = jedisPool.getResource();  
			return jedis.get(key);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}finally{  
            jedisPool.returnResource(jedis);  
        }
	}

	/**
	 * 查询特定字符串
	 */
	public String findSubStr(String key,Integer startOffset,Integer endOffset){
		Jedis jedis = null;
		try {
			jedis = jedisPool.getResource();  
			return jedis.getrange(key, startOffset, endOffset);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}finally{  
            jedisPool.returnResource(jedis);  
        }
	}
	 /** 
     * 向缓存中设置字符串内容 新增数据|修改
     * @param key key 
     * @param value value 
     * @return 
     * @throws Exception 
     */  
    public static int add(String key,String value) throws Exception{  
        Jedis jedis = null;  
        try {  
            jedis = jedisPool.getResource();  
            jedis.set(key, value);  
            return 0;  
        } catch (Exception e) {  
            e.printStackTrace();  
            return -1;  
        }finally{  
            jedisPool.returnResource(jedis);  
        }  
    }  

	/** 
     * 删除缓存中得对象，根据key 
     * @param key 
     * @return 
     */  
    public static int del(String key){  
        Jedis jedis = null;  
        try {  
            jedis = jedisPool.getResource();  
            jedis.del(key);  
            return 0;  
        } catch (Exception e) {  
            e.printStackTrace();  
            return -1;  
        }finally{  
            jedisPool.returnResource(jedis);  
        }  
    }  

}