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redis操作帮助类
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内容图文
import redis.clients.jedis.*;
import java.util.*;
public class RedisHelper {
private static JedisPool pool;
private static RedisHelper redisHelper = null;
/**
* 通过静态工厂方法来沟通对象，复用对象，避免每次重新产生新对象
*/
public static RedisHelper newInstance(String host, int port, String password, int maxIdle, int maxTotal, long maxWaitMillis) {
if (null != redisHelper)
return redisHelper;
synchronized (RedisHelper.class) {
if (null != redisHelper)
return redisHelper;
redisHelper = new RedisHelper(host, port, password, maxIdle, maxTotal, maxWaitMillis);
return redisHelper;
}
}
private RedisHelper(String host, int port, String password, int maxIdle, int maxTotal, long maxWaitMillis) {
if (null != pool)
return;
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxIdle(maxIdle);//最大空闲连接数
config.setMaxTotal(maxTotal);//最大连接数
config.setTestOnBorrow(true);
config.setTestOnReturn(false);
config.setMaxWaitMillis(maxWaitMillis);
pool = new JedisPool(config, host, port, 10000, password);
}
/**
* 没有特别需求，请不要在外部调用此方法
*/
public Jedis getConnection() {
return pool.getResource();
}
public void returnConnection(Jedis conn) {
//自Jedis3.0版本后jedisPool.returnResource()遭弃用,官方重写了Jedis的close方法用以代替
if (null != conn) {
conn.close();
}
}
public Pipeline pipeline() {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.pipelined();
} finally {
this.returnConnection(conn);
}
}
public Set<String> keys(String pattern) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.keys(pattern);
} finally {
this.returnConnection(conn);
}
}
public void set(String key, String value) {
Jedis conn = null;
try {
conn = this.getConnection();
conn.set(key, value);
} finally {
this.returnConnection(conn);
}
}
public long setNx(String key, String value) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.setnx(key, value);
} finally {
this.returnConnection(conn);
}
}
public String get(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.get(key);
} finally {
this.returnConnection(conn);
}
}
public String getSet(String key, String value) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.getSet(key, value);
} finally {
this.returnConnection(conn);
}
}
public long del(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.del(key);
} finally {
this.returnConnection(conn);
}
}
public long del(String... keys) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.del(keys);
} finally {
this.returnConnection(conn);
}
}
/**
* 若 key 存在，返回 true ，否则返回 false 。
*/
public boolean exists(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.exists(key);
} finally {
this.returnConnection(conn);
}
}
/**
* 设置成功，返回 1, key 不存在或设置失败，返回 0
*/
public long pexpire(String key, long milliseconds) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.pexpire(key, milliseconds);
} finally {
this.returnConnection(conn);
}
}
public long hset(String key, String field, String value) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.hset(key, field, value);
} finally {
this.returnConnection(conn);
}
}
/**
* 将哈希表 key 中的域 field 的值设置为 value ，当且仅当域 field 不存在。
* 若域 field 已经存在，该操作无效。
* 如果 key 不存在，一个新哈希表被创建并执行 HSETNX 命令。
*/
public long hsetnx(String key, String field, String value) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.hsetnx(key, field, value);
} finally {
this.returnConnection(conn);
}
}
public long hdel(String key, String... fields) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.hdel(key, fields);
} finally {
this.returnConnection(conn);
}
}
public Set<String> hkeys(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.hkeys(key);
} finally {
this.returnConnection(conn);
}
}
public Map<String, String> hgetAll(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.hgetAll(key);
} finally {
this.returnConnection(conn);
}
}
public String hget(String key, String field) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.hget(key, field);
} finally {
this.returnConnection(conn);
}
}
public long hincrBy(String key, String field, Long value) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.hincrBy(key, field, value);
} finally {
this.returnConnection(conn);
}
}
public Long rpush(String key, String... strings) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.rpush(key, strings);
} finally {
this.returnConnection(conn);
}
}
/**
* 返回元素个数
*/
public Long lpush(String key, String... strings) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.lpush(key, strings);
} finally {
this.returnConnection(conn);
}
}
public String lpop(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.lpop(key);
} finally {
this.returnConnection(conn);
}
}
public String rpop(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.rpop(key);
} finally {
this.returnConnection(conn);
}
}
public List<String> lrange(String key, long start, long end) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.lrange(key, start, end);
} finally {
this.returnConnection(conn);
}
}
public long sadd(String key, String... members) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.sadd(key, members);
} finally {
this.returnConnection(conn);
}
}
public Set<String> sinter(String... keys) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.sinter(keys);
} finally {
this.returnConnection(conn);
}
}
public long scard(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.scard(key);
} finally {
this.returnConnection(conn);
}
}
public String spop(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.spop(key);
} finally {
this.returnConnection(conn);
}
}
public long srem(String key, String... members) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.srem(key, members);
} finally {
this.returnConnection(conn);
}
}
public Set<String> smembers(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.smembers(key);
} finally {
this.returnConnection(conn);
}
}
public Set<String> sunion(String... keys) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.sunion(keys);
} finally {
this.returnConnection(conn);
}
}
public boolean sismember(String key, String member) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.sismember(key, member);
} finally {
this.returnConnection(conn);
}
}
public long increment(String key, long amount) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.incrBy(key, amount);
} finally {
this.returnConnection(conn);
}
}
public double increment(String key, double amount) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.incrByFloat(key, amount);
} finally {
this.returnConnection(conn);
}
}
/**
* 列表长度
*/
public long llen(String key) {
Jedis conn = null;
try {
conn = this.getConnection();
return conn.llen(key);
} finally {
this.returnConnection(conn);
}
}
}
原文：https://www.cnblogs.com/lalalagq/p/10218987.html
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