Java程序操作Redis（二）

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1 部署Redis环境，可参考

http://blog.itpub.net/29485627/viewspace-2139764/

2 建立Java Project，并添加commons-pool2-2.2,jedis-2.7.3, log4j-1.2.16, log4j-api-2.7.jar, log4j-core-2.7五个包。

3 在sr/com/zheng下建立RedisUti.java，内容为

package com.zheng;import org.apache.logging.log4j.LogManager;import org.apache.logging.log4j.Logger;import redis.clients.jedis.Jedis;import redis.clients.jedis.JedisPool;import redis.clients.jedis.JedisPoolConfig;public final class RedisUtil {    private static Logger logger = LogManager.getLogger(RedisUtil.class);    private static String ADDR = "192.168.121.210";    private static int PORT = 6379;    private static String AUTH = null;    private static int MAX_ACTIVE = 300;    private static int MAX_IDLE = 200;    private static int MAX_WAIT = 10000;    private static int TIMEOUT = 10000;    private static boolean TEST_ON_BORROW = true;    private static JedisPool jedisPool = null;    private static Jedis jedis = null;    static {        try {            init();        } catch (Exception e) {            logger.error("初始化Redis出错，" + e);        }    }    private synchronized static void init() {        JedisPoolConfig config = new JedisPoolConfig();        config.setMaxIdle(MAX_IDLE);        config.setMaxWaitMillis(MAX_WAIT);        config.setTestOnBorrow(TEST_ON_BORROW);        config.setMaxTotal(MAX_ACTIVE);        jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT, AUTH);    }    static Jedis getJedis() {        try {            if (jedisPool != null) {                jedis = jedisPool.getResource();            } else {                init();                jedis = jedisPool.getResource();            }        } catch (Exception e) {            logger.error("获取Redis实例出错，" + e);        }        return jedis;    }    public static String set(String key, String value) {        return set(key, value, null);    }    public static String set(String key, String value, Integer timeout) {        String result = null;        Jedis jedis = RedisUtil.getJedis();        if (jedis == null) {            return result;        }        try {            result = jedis.set(key, value);            if (null != timeout) {                jedis.expire(key, timeout);            }        } catch (Exception e) {            logger.error(e.getMessage(), e);        } finally {            if (null != jedis) {                jedis.close();            }        }        return result;    }    public static String get(String key) {        String result = null;        Jedis jedis = RedisUtil.getJedis();        if (jedis == null) {            return result;        }        try {            result = jedis.get(key);        } catch (Exception e) {            logger.error(e.getMessage(), e);        } finally {            if (null != jedis) {                jedis.close();            }        }        return result;    }    public static boolean del(String key) {        Boolean result = Boolean.FALSE;        Jedis jedis = RedisUtil.getJedis();        if (null == jedis) {            return Boolean.FALSE;        }        try {            jedis.del(key);        } catch (Exception e) {            logger.error("Error occured when delete, " + e);        } finally {            if (null != jedis) {                jedis.close();            }        }        return result;    }    public static Long append(String key, String value) {        Long result = Long.valueOf(0);        Jedis jedis = RedisUtil.getJedis();        if (null == jedis) {            return result;        }        try {            result = jedis.append(key, value);        } catch (Exception e) {            logger.error("追加redis数据出错，" + e);        } finally {            if (null != jedis) {                jedis.close();            }        }        return result;    }    public static Boolean exists(String key) {        Boolean result = Boolean.FALSE;        Jedis jedis = RedisUtil.getJedis();        if (null == jedis) {            return result;        }        try {            result = jedis.exists(key);        } catch (Exception e) {            logger.error("Error when examine, " + e);        } finally {            if (null != jedis) {                jedis.close();            }        }        return result;    }}

4 在src/com/zheng/下建立RedisTest.java，内容为

package com.zheng;import com.zheng.RedisUtil;public class RedisTest {public static void main(String[] args) {RedisUtil.getJedis().set("name", "Zheng");System.out.println(RedisUtil.getJedis().get("name"));}}

5 在src下建立log4j2.xml，内容为

<?xml version="1.0" encoding="UTF-8"?><Configuration status="WARN">  <Appenders>    <Console name="Console" target="SYSTEM_OUT">      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>    </Console>  </Appenders>  <Loggers>     <Logger name="com.demo.NamedHierarchy" level="trace">       <AppenderRef ref="Console"/></Logger><Logger name="com.demo" level="debug">       <AppenderRef ref="Console"/></Logger>    <Root level="error">      <AppenderRef ref="Console"/>    </Root>      </Loggers></Configuration>

6 运行RedisTest.java，结果为

7 代码下载地址为

https://github.com/zhenghaishu/RedisUtil

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