Java Redis 连接池 Jedis 工具类，java基础面试笔试题

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import org.slf4j.Logger; import org.slf4j.LoggerFactory; import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisPool; import redis.clients.jedis.JedisPoolConfig; import java.io.IOException; import java.io.InputStream; import java.util.Properties; public class MyJedisPool { private final static Logger logger = LoggerFactory.getLogger(MyJedisPool.class); private static JedisPool readPool = null; private static JedisPool writePool = null; //静态代码初始化池配置 static { try{ Properties props = new Properties(); InputStream in = MyJedisPool.class.getResourceAsStream("/redis.properties"); props.load(in); //创建jedis池配置实例 JedisPoolConfig config = new JedisPoolConfig(); //设置池配置项值 config.setMaxTotal(Integer.valueOf(props.getProperty("jedis.pool.maxActive"))); config.setMaxIdle(Integer.valueOf(props.getProperty("jedis.pool.maxIdle"))); config.setMaxWaitMillis(Long.valueOf(props.getProperty("jedis.pool.maxWait"))); config.setTestOnBorrow(Boolean.valueOf(props.getProperty("jedis.pool.testOnBorrow"))); config.setTestOnReturn(Boolean.valueOf(props.getProperty("jedis.pool.testOnReturn"))); //根据配置实例化jedis池 readPool = new JedisPool(config, props.getProperty("redisReadURL"), Integer.valueOf(props.getProperty("redisReadPort"))); writePool = new JedisPool(config, props.getProperty("redisWriteURL"), Integer.valueOf(props.getProperty("redisWritePort"))); }catch (IOException e) { logger.info("redis连接池异常",e); } } /**获得jedis对象*/ public static Jedis getReadJedisObject(){ return readPool.getResource(); } /**获得jedis对象*/ public static Jedis getWriteJedisObject(){ return writePool.getResource(); } /**归还jedis对象*/ public static void returnJedisOjbect(Jedis jedis){ if (jedis != null) { jedis.close(); } } }

import redis.clients.jedis.Jedis;import java.util.Set;public class RedisUtils {/*** 获取hash表中所有key* @param name* @return*/public static Set<String> getHashAllKey(String name){Jedis jedis = null;try {jedis = MyJedisPool.getReadJedisObject();return jedis.hkeys(name);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 从redis hash表中获取* @param hashName* @param key* @return*/public static String getHashKV(String hashName,String key){Jedis jedis = null;try {jedis = MyJedisPool.getReadJedisObject();return jedis.hget(hashName, key);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 删除hash表的键值对* @param hashName* @param key*/public static Long delHashKV(String hashName,String key){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.hdel(hashName,key);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 存放hash表键值对* @param hashName* @param key* @param value*/public static Long setHashKV(String hashName,String key,String value){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.hset(hashName,key,value);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 删除键值对* @param k* @return*/public static Long delKV(String k){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.del(k);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 放键值对* 永久* @param k* @param v*/public static String setKV(String k, String v){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.set(k, v);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 放键值对** @param k* @param v*/public static String setKV(String k,int second, String v){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.setex(k,second, v);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 根据key取value** @param k* @return*/public static String getKV(String k){Jedis jedis = null;try {jedis = MyJedisPool.getReadJedisObject();return jedis.get(k);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}}import java.util.Set;public class RedisUtils {/*** 获取hash表中所有key* @param name* @return*/public static Set<String> getHashAllKey(String name){Jedis jedis = null;try {jedis = MyJedisPool.getReadJedisObject();return jedis.hkeys(name);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 从redis hash表中获取* @param hashName* @param key* @return*/public static String getHashKV(String hashName,String key){Jedis jedis = null;try {jedis = MyJedisPool.getReadJedisObject();return jedis.hget(hashName, key);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 删除hash表的键值对* @param hashName* @param key*/public static Long delHashKV(String hashName,String key){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.hdel(hashName,key);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 存放hash表键值对* @param hashName* @param key* @param value*/public static Long setHashKV(String hashName,String key,String value){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.hset(hashName,key,value);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 删除键值对* @param k* @return*/public static Long delKV(String k){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.del(k);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 放键值对* 永久* @param k* @param v*/public static String setKV(String k, String v){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.set(k, v);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 放键值对** @param k* @param v*/public static String setKV(String k,int second, String v){Jedis jedis = null;try {jedis = MyJedisPool.getWriteJedisObject();return jedis.setex(k,second, v);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}/*** 根据key取value** @param k* @return*/public static String getKV(String k){Jedis jedis = null;try {jedis = MyJedisPool.getReadJedisObject();return jedis.get(k);}catch (Exception e){e.printStackTrace();}finally {MyJedisPool.returnJedisOjbect(jedis);}return null;}}

转载：https://www.cnblogs.com/yanqin/p/8342836.html

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