RedisUtil: Jedis连接自动释放
package cloud.app.prod.home.utils; import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisPool; import redis.clients.jedis.JedisPoolConfig; public class RedisUtil { // Redis服务器IP private static String ADDR = "127.0.0.1"; // Redis的端口号 private static int PORT = 6379; // 访问密码 private static String AUTH = "scrm__12345"; // 可用连接实例的最大数目,默认值为8; // 如果赋值为-1,则表示不限制;如果pool已经分配了maxActive个jedis实例,则此时pool的状态为exhausted(耗尽)。 private static int MAX_ACTIVE = 1024; // 控制一个pool最多有多少个状态为idle(空闲的)的jedis实例,默认值也是8。 private static int MAX_IDLE = 200; // 等待可用连接的最大时间,单位毫秒,默认值为-1,表示永不超时。如果超过等待时间,则直接抛出JedisConnectionException; private static int MAX_WAIT = 10000; private static int TIMEOUT = 10000; // 在borrow一个jedis实例时,是否提前进行validate操作;如果为true,则得到的jedis实例均是可用的; private static boolean TEST_ON_BORROW = true; private static JedisPool jedisPool = null; /** * 初始化Redis连接池 */ static { try { JedisPoolConfig config = new JedisPoolConfig(); config.setMaxActive(MAX_ACTIVE); config.setMaxIdle(MAX_IDLE); config.setMaxWait(MAX_WAIT); config.setTestOnBorrow(TEST_ON_BORROW); jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT, AUTH); } 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); } } /** * Jedis对象出异常的时候,回收Jedis对象资源 * * @param jedis */ public static void returnBrokenResource(final Jedis jedis) { if (jedis != null) { jedisPool.returnBrokenResource(jedis); } } /** * 通过Redis的key获取值,并释放连接资源 * @param key * @return 成功返回value,失败返回null */ public static String get(String key) { Jedis jedis = null; String value = null; try { jedis = getJedis(); if (null != jedis) { value = jedis.get(key); } } catch (Exception e) { returnBrokenResource(jedis); e.printStackTrace(); } finally { returnResource(jedis); } return value; } /** * 向redis存入key和value(如果key已经存在 则覆盖),并释放连接资源 * @param key * @param value */ public static void set(String key, String value) { Jedis jedis = null; try { jedis = getJedis(); if (null != jedis) { jedis.set(key, value); } } catch (Exception e) { returnBrokenResource(jedis); e.printStackTrace(); } finally { returnResource(jedis); } } /** * 向redis存入key和value(如果key已经存在 则覆盖),并且设置存活时间,及释放连接资源 * @param key * @param value * @param seconds */ public static void set(String key, String value, int seconds) { Jedis jedis = null; try { jedis = getJedis(); if (null != jedis) { jedis.set(key, value); jedis.expire(key, seconds); } } catch (Exception e) { returnBrokenResource(jedis); e.printStackTrace(); } finally { returnResource(jedis); } } public static String byte2hex(byte[] buffer) { String h = "0x"; for (byte aBuffer : buffer) { String temp = Integer.toHexString(aBuffer & 0xFF); if (temp.length() == 1) { temp = "0" + temp; } h = h + " " + temp; } return h; } }