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<String, String> 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<String, String> 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<String, String> hgetAll(int db, String key) {
Jedis jedis = null;
Map<String, String> 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
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.7</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
