Java使用Jedis操作Redis数据库（纯代码）

RedisUtil工具类

public final class RedisUtil {

    //Redis服务器IP
    private static String ADDR;

    //Redis的端口号
    private static int PORT;

    //访问密码
    private static String AUTH;

    //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;

    //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;

    //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;

    private static int TIMEOUT;

    //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 {
            //初始化配置
            //redis.properties需放在resource文件夹下
            InputStream fis = RedisUtil.class.getClassLoader().getResourceAsStream("redis.properties");
            PropertyResourceBundle props = new PropertyResourceBundle(fis);
            ADDR = props.getString("addr");
            PORT = Integer.parseInt(props.getString("port"));
            AUTH = props.getString("auth");
            MAX_ACTIVE = Integer.parseInt(props.getString("max_active"));
            MAX_IDLE = Integer.parseInt(props.getString("max_idle"));
            MAX_WAIT = Integer.parseInt(props.getString("max_wait"));
            TIMEOUT = Integer.parseInt(props.getString("timeout"));

            JedisPoolConfig config = new JedisPoolConfig();
            config.setMaxTotal(MAX_ACTIVE);
            config.setMaxIdle(MAX_IDLE);
            config.setMaxWaitMillis(MAX_WAIT);
            config.setTestOnBorrow(TEST_ON_BORROW);
            //判断有没有AUTH
            if(StringUtils.isEmpty(AUTH)) {//如果没有密码
                jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT);
            } else {
                jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT, AUTH);
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取Jedis实例
     * @return
     */
    public 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) {
            jedis.close();
            //jedisPool.returnResource(jedis);
        }
    }

    /**
     * redis set操作
     * @param db 操作的数据库编号
     * @param key
     * @param value
     * @return
     */
    public static String set(int db, String key, String value) {
        Jedis jedis = null;
        String result = null;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                result = jedis.set(key, value);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return result;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis setex操作
     * @param db 操作的数据库编号
     * @param key
     * @param value
     * @param seconds
     * @return
     */
    public static String setex(int db, String key, String value, int seconds) {
        Jedis jedis = null;
        String result = null;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                result = jedis.setex(key, seconds, value);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return result;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis set操作
     * @param db 操作的数据库编号
     * @param key
     * @return
     */
    public static String get(int db, String key) {
        Jedis jedis = null;
        String value = null;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                value = jedis.get(key);
            }
            return value;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return value;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis del操作
     * @param db 操作的数据库编号
     * @param key
     * @return
     */
    public static Long del(int db, String key) {
        Jedis jedis = null;
        Long result = null;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                result = jedis.del(key);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return result;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis hmset操作
     * @param db 操作的数据库编号
     * @param key
     * @param value
     * @return
     */
    public static String hmset(int db, String key, Map value) {
        Jedis jedis = null;
        String result = null;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                result = jedis.hmset(key, value);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return result;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis hmset操作,设置过期时间
     * @param db 操作的数据库编号
     * @param key
     * @param value
     * @param seconds 过期时间
     * @return
     */
    public static String hmsetex(int db, String key, Map value, int seconds) {
        Jedis jedis = null;
        String result = null;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                result = jedis.hmset(key, value);
                jedis.expire(key, seconds);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return result;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis hgetAll操作
     * @param db 操作的数据库编号
     * @param key
     * @return
     */
    public static Map hgetAll(int db, String key) {
        Jedis jedis = null;
        Map value = null;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                value = jedis.hgetAll(key);
            }
            return value;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return value;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis sismember操作
     * @param db 操作的数据库编号
     * @param key
     * @param member
     * @return
     */
    public static boolean sismember(int db, String key, String member) {
        Jedis jedis = null;
        boolean result = false;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                result = jedis.sismember(key, member);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return result;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis lpush操作
     * @param db 操作的数据库编号
     * @param key
     * @param value
     * @return
     */
    public static long lpush(int db, String key, String value) {
        Jedis jedis = null;
        long result = 0;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                result = jedis.lpush(key, value);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return result;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis rpop操作
     * @param db 操作的数据库编号
     * @param key
     * @return
     */
    public static String rpop(int db, String key) {
        Jedis jedis = null;
        String value = null;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                value = jedis.rpop(key);
            }
            return value;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return value;
        } finally {
            returnResource(jedis);
        }
    }

    /**
     * redis hset操作
     * @param db 操作的数据库编号
     * @param key
     * @param field
     * @param value
     * @return
     */
    public static long hset(int db, String key, String field, String value) {
        Jedis jedis = null;
        long result = 0;
        try {
            jedis = getJedis();
            if(jedis != null) {
                jedis.select(db);
                result = jedis.hset(key, field, value);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            returnResource(jedis);
            return result;
        } finally {
            returnResource(jedis);
        }
    }

}

resource下需要引入的配置文件

addr=127.0.0.1

port=6379

auth=

max_active=100

max_idle=100

max_wait=10000

timeout=10000

maven需要添加的依赖jar包

      
          org.apache.commons
          commons-lang3
          3.7
      
    
      redis.clients
      jedis
      2.9.0