Redis，JedisPool工具类
导入相关依赖：
commons-pool2-2.3.jar
jedis-2.7.0.jar
1、JedisPool
package com.yj.test.javaBases.testJedis;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisCommands;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
public class TestJedis {
public static final Logger logger = LoggerFactory.getLogger(TestJedis.class);
// Jedispool
JedisCommands jedisCommands;
JedisPool jedisPool;
JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
String ip = "192.168.x.x";
int port = 6379;
int timeout = 2000;
public TestJedis() {
// 初始化jedis
// 设置配置
jedisPoolConfig.setMaxTotal(1024);
jedisPoolConfig.setMaxIdle(100);
jedisPoolConfig.setMaxWaitMillis(100);
jedisPoolConfig.setTestOnBorrow(false);//jedis 第一次启动时，会报错
jedisPoolConfig.setTestOnReturn(true);
// 初始化JedisPool
jedisPool = new JedisPool(jedisPoolConfig, ip, port, timeout);
//
Jedis jedis = jedisPool.getResource();
jedisCommands = jedis;
}
public void setValue(String key, String value) {
this.jedisCommands.set(key, value);
}
public String getValue(String key) {
return this.jedisCommands.get(key);
}
public static void main(String[] args) {
TestJedis testJedis = new TestJedis();
testJedis.setValue("testJedisKey", "testJedisValue");
logger.info("get value from redis:{}",testJedis.getValue("testJedisKey"));
}
}
详细配置解释代码
package com.test;
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 = "192.168.0.41";
//Redis的端口号
private static int PORT = 6379;
//访问密码
private static String AUTH = "admin";
//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_TOTAL = 8;
//最小空闲连接数, 默认0
private static int MIN_IDLE=0;
//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。
//最大空闲连接数, 默认8个
private static int MAX_IDLE = 8;
//获取连接时的最大等待毫秒数(如果设置为阻塞时BlockWhenExhausted),如果超时就抛异常, 小于零:阻塞不确定的时间, 默认-1
//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 = -1;
private static int TIMEOUT = 10000;
//连接耗尽时是否阻塞, false报异常,ture阻塞直到超时, 默认true
private static boolean BLOCK_WHEN_EXHAUSTED = false;
//设置的逐出策略类名, 默认DefaultEvictionPolicy(当连接超过最大空闲时间,或连接数超过最大空闲连接数)
private static String EVICTION_POLICY_CLASSNAME="org.apache.commons.pool2.impl.DefaultEvictionPolicy";
//是否启用pool的jmx管理功能, 默认true
private static boolean JMX_ENABLED=true;
//MBean ObjectName = new ObjectName("org.apache.commons.pool2:type=GenericObjectPool,name=" + "pool" + i); 默认为"pool", JMX不熟,具体不知道是干啥的...默认就好.
private static String JMX_NAME_PREFIX="pool";
//是否启用后进先出, 默认true
private static boolean LIFO=true;
//逐出连接的最小空闲时间 默认1800000毫秒(30分钟)
private static long MIN_EVICTABLE_IDLE_TIME_MILLIS=1800000L;
//对象空闲多久后逐出, 当空闲时间>该值 且 空闲连接>最大空闲数 时直接逐出,不再根据MinEvictableIdleTimeMillis判断 (默认逐出策略)
private static long SOFT_MIN_EVICTABLE_IDLE_TIME_MILLIS=1800000L;
//每次逐出检查时 逐出的最大数目 如果为负数就是 : 1/abs(n), 默认3
private static int NUM_TESTS_PER_EVICYION_RUN=3;
//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；
//在获取连接的时候检查有效性, 默认false
private static boolean TEST_ON_BORROW = false;
//在空闲时检查有效性, 默认false
private static boolean TEST_WHILEIDLE=false;
//逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1
private static long TIME_BERWEEN_EVICTION_RUNS_MILLIS=-1;
private static JedisPool jedisPool = null;
/**
* 初始化Redis连接池
*/
static {
try {
JedisPoolConfig config = new JedisPoolConfig();
config.setBlockWhenExhausted(BLOCK_WHEN_EXHAUSTED);
config.setEvictionPolicyClassName(EVICTION_POLICY_CLASSNAME);
config.setJmxEnabled(JMX_ENABLED);
config.setJmxNamePrefix(JMX_NAME_PREFIX);
config.setLifo(LIFO);
config.setMaxIdle(MAX_IDLE);
config.setMaxTotal(MAX_TOTAL);
config.setMaxWaitMillis(MAX_WAIT);
config.setMinEvictableIdleTimeMillis(MIN_EVICTABLE_IDLE_TIME_MILLIS);
config.setMinIdle(MIN_IDLE);
config.setNumTestsPerEvictionRun(NUM_TESTS_PER_EVICYION_RUN);
config.setSoftMinEvictableIdleTimeMillis(SOFT_MIN_EVICTABLE_IDLE_TIME_MILLIS);
config.setTestOnBorrow(TEST_ON_BORROW);
config.setTestWhileIdle(TEST_WHILEIDLE);
config.setTimeBetweenEvictionRunsMillis(TIME_BERWEEN_EVICTION_RUNS_MILLIS);
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 close(final Jedis jedis) {
if (jedis != null) {
jedis.close();
}
}
}
2、Jedis工具类
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
public class RedisUtil {
//服务器IP地址
private static String ADDR = "ip";
//端口
private static int PORT = 6379;
//密码
private static String AUTH = "";
//连接实例的最大连接数
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;
//连接超时的时间
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;
//数据库模式是16个数据库 0~15
public static final int DEFAULT_DATABASE = 0;
/**
* 初始化Redis连接池
*/
static {
try {
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(MAX_ACTIVE);
config.setMaxIdle(MAX_IDLE);
config.setMaxWaitMillis(MAX_WAIT);
config.setTestOnBorrow(TEST_ON_BORROW);
jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT, null, DEFAULT_DATABASE);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 获取Jedis实例
*/
public synchronized static Jedis getJedis() {
try {
if (jedisPool != null) {
Jedis resource = jedisPool.getResource();
System.out.println("redis--服务正在运行: " + resource.ping());
return resource;
} else {
return null;
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public synchronized Jedis getJedisPublic() {
try {
if (jedisPool != null) {
Jedis resource = jedisPool.getResource();
System.out.println("redis--服务正在运行: " + resource.ping());
return resource;
} else {
return null;
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/***
*
* 释放资源
*/
public static void returnResource(final Jedis jedis) {
if (jedis != null) {
jedisPool.returnResource(jedis);
}
}
public static void main(String[] args) {
Jedis jedis = RedisUtil.getJedis();
jedis.lpush("site-list", "Runoob");
jedis.lpush("site-list", "Google");
jedis.lpush("site-list", "Taobao");
jedis.hset("OverDrive", "vehicle", "1");
jedis.hset("OverDrive", "car", "1");
jedis.expire("OverDrive", 60);
jedis.set("runoobkey", "www.runoob.com");
// 获取存储的数据并输出
System.out.println("redis 存储的字符串为: " + jedis.get("runoobkey"));
RedisUtil.returnResource(jedis);
}
}