1. Maven 坐标：
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.1.0</version>
</dependency>2.代码：
package com.wwx.utils;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
public class JedisPoolUtil{
/**
* 创建JedisPool实例
*/
private static volatile JedisPool pool = null;
//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 = null;
//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 int DATA_BASE = 0;
/**
* 私有化构造方法JedisPoolUtil.
*/
private JedisPoolUtil() {}
/**
*
* @Title: getJedisPoolInstance
* @Description: TODO(JedisPool的连接池)
* @return JedisPool 返回类型
* @throws
*/
public static JedisPool getJedisPoolInstance() {
if (pool == null) {
synchronized (JedisPoolUtil.class) {
if (pool == null) {
JedisPoolConfig poolConfig = new JedisPoolConfig();
poolConfig.setMaxActive(MAX_ACTIVE);
poolConfig.setMaxIdle(MAX_IDLE);
poolConfig.setMaxWait(MAX_WAIT);
poolConfig.setTestOnBorrow(TEST_ON_BORROW);
pool = new JedisPool(poolConfig, ADDR, PORT, TIMEOUT, AUTH, DATA_BASE);
}
}
}
return pool;
}
/**
*
* @Title: release
* @Description: TODO(回收jedis)
* @param pool
* @param jedis void 返回类型
* @throws
*/
public static void release(JedisPool pool,Jedis jedis) {
if (jedis != null) {
pool.returnResourceObject(jedis);
}
}
/**
*
* @Title: set
* @Description: TODO(设置一个值向Redis)
* @param key 指定的键
* @param value 指定的值
* @return String 返回类型
* @throws
*/
public static String set(String key,String value) {
// TODO Auto-generated method stub
Jedis jedis = null;
String set = null;
try {
jedis = pool.getResource();
set = jedis.set(key, value);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: set
* @Description: TODO(设置一个值向Redis 可以选择数据库)
* @param key 指定的键
* @param value 指定的值
* @param dbIndex 数据库下标
* @return String 返回类型
* @throws
*/
public static String set(String key,String value,int dbIndex) {
// TODO Auto-generated method stub
Jedis jedis = null;
String set = null;
try {
jedis = pool.getResource();
jedis.select(dbIndex);
set = jedis.set(key, value);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: get
* @Description: TODO(获取一个值)
* @param key 指定的键
* @return String 返回类型
* @throws
*/
public static String get(String key) {
// TODO Auto-generated method stub
Jedis jedis = null;
String set = null;
try {
jedis = pool.getResource();
set = jedis.get(key);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: get
* @Description: TODO(获取一个值 可以选择数据库)
* @param key 指定的键
* @param dbIndex 数据库下标
* @return String 返回类型
* @throws
*/
public static String get(String key,int dbIndex) {
// TODO Auto-generated method stub
Jedis jedis = null;
String set = null;
try {
jedis = pool.getResource();
jedis.select(dbIndex);
set = jedis.get(key);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: setOutTime
* @Description: TODO(给指定键设置一个过期时间)
* @param key 指定的键
* @param seconds 设置的秒数
* @return Long 返回类型
* @throws
*/
public static Long setOutTime(String key,int seconds) {
// TODO Auto-generated method stub
Jedis jedis = null;
Long set = null;
try {
jedis = pool.getResource();
set = jedis.expire(key, seconds);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: setOutTime
* @Description: TODO(给指定键设置一个过期时间 可以选择数据库)
* @param key 指定的键
* @param seconds 设置秒数
* @param dbIndex 数据库下标
* @return Long 返回类型
* @throws
*/
public static Long setOutTime(String key,int seconds,int dbIndex) {
// TODO Auto-generated method stub
Jedis jedis = null;
Long set = null;
try {
jedis = pool.getResource();
jedis.select(dbIndex);
set = jedis.expire(key, seconds);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: exists
* @Description: TODO(判断指定键是否存在)
* @param key 指定的键
* @return Boolean 返回类型
* @throws
*/
public static Boolean exists(String key) {
// TODO Auto-generated method stub
Jedis jedis = null;
Boolean set = null;
try {
jedis = pool.getResource();
set = jedis.exists(key);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: exists
* @Description: TODO(判断指定键是否存在 可以选择数据库)
* @param key 指定得键
* @param dbIndex 数据库下标
* @return Boolean 返回类型
* @throws
*/
public static Boolean exists(String key,int dbIndex) {
// TODO Auto-generated method stub
Jedis jedis = null;
Boolean set = null;
try {
jedis = pool.getResource();
jedis.select(dbIndex);
set = jedis.exists(key);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: del
* @Description: TODO(删除指定的值)
* @param keys 要删除值的名称 这里是个字符串无限参数
* @return Long 返回类型
* @throws
*/
public static Long del(String...keys) {
// TODO Auto-generated method stub
Jedis jedis = null;
Long set = null;
try {
jedis = pool.getResource();
set = jedis.del(keys);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: del
* @Description: TODO(删除指定的值 可以选择数据库)
* @param dbIndex 数据库下标
* @param keys 要删除值的名称 这里是个字符串无限参数
* @return Long 返回类型
* @throws
*/
public static Long del(int dbIndex,String...keys) {
// TODO Auto-generated method stub
Jedis jedis = null;
Long set = null;
try {
jedis = pool.getResource();
jedis.select(dbIndex);
set = jedis.del(keys);
} catch (Exception e) {
// TODO: handle exception
pool.returnBrokenResource(jedis);
e.printStackTrace();
}finally {
release(pool, jedis);
}
return set;
}
/**
*
* @Title: setAUTH
* @Description: TODO(设置密码默认为 null <p>如果没有密码请不要设置</p>)
* @param aUTH void 返回类型
* @throws
*/
public static void setPassword(String upass) {
AUTH = upass;
}
/**
*
* @Title: setDATA_BASE
* @Description: TODO(选择数据库 默认为0号数据库)
* @param dATA_BASE void 返回类型
* @throws
*/
public static void setdataBase(int dbIndex) {
DATA_BASE = dbIndex;
}
/*
* 测试
*/
public static void main(String[] args) {
JedisPoolUtil.DATA_BASE = 2;
JedisPoolUtil.getJedisPoolInstance();
String set = JedisPoolUtil.set("wong", "666");
System.out.println(set);
}
}