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详解java操作Redis数据库的redis工具(RedisUtil,jedis工具JedisUtil,JedisPoolUtil)

时间:2021-11-29 13:37     来源/作者:miniduhua

该工具包含是封装了jedis,包含redis.properties和jedisPool,序列化使用的是protostuff,map类型操作使用的是fastjson

自己抽空写的,基本只要理解什么是get,什么是set就可以使用redis数据库了

下载地址:点击打开链接

JedisPoolUtil的源码:

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package com.bsy.common;
 
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Properties;
 
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
 
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
 
public class JedisPoolUtil {
 
    private static final String PROPERTIES_PATH = "redis.properties";
    private static JedisPool jedisPool;
 
    
    static {
        if (jedisPool == null) {
            try {
                init();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
 
    /**
     * 初始化Jedis连接池
     *
     * @throws IOException
     */
    private static void init() throws IOException {
        URL resource = JedisPoolUtil.class.getClassLoader().getResource(PROPERTIES_PATH);
        if (resource == null) {
            throw new FileNotFoundException("没有找到指定redis的配置文件:" + PROPERTIES_PATH);
        }
        //加载配置文件
        InputStream input = new FileInputStream(resource.getFile());
        Properties p = new Properties();
        p.load(input);
        //开始配置JedisPool
        String host = p.getProperty("redis.host") == null ? "localhost" : p.getProperty("redis.host");
        int port = p.getProperty("redis.port") == null ? 6379 : Integer.parseInt(p.getProperty("redis.port"));
        String auth = p.getProperty("redis.auth");
        int poolTimeOut = p.getProperty("connectionTimeOut") == null ? 2000
                : Integer.parseInt(p.getProperty("connectionTimeOut"));
        //判断使用默认的配置方式还是采用自定义配置方式,
        boolean isSetDefault = p.getProperty("defaultSetting") == null ? true
                : Boolean.parseBoolean(p.getProperty("defaultSetting"));
        if (isSetDefault) {
            jedisPool = new JedisPool(new GenericObjectPoolConfig(), host, port, poolTimeOut, auth);
        } else {
            JedisPoolConfig config = new JedisPoolConfig();
            String blockWhenExhausted = p.getProperty("redis.blockWhenExhausted");
            if (blockWhenExhausted != null) {
                config.setBlockWhenExhausted(Boolean.parseBoolean(blockWhenExhausted));
            }
            String evictionPolicyClassName = p.getProperty("redis.evictionPolicyClassName");
            if (evictionPolicyClassName != null) {
                config.setEvictionPolicyClassName(evictionPolicyClassName);
            }
            String jmxEnabled = p.getProperty("redis.jmxEnabled");
            if (jmxEnabled != null) {
                config.setJmxEnabled(Boolean.parseBoolean(jmxEnabled));
            }
            String lifo = p.getProperty("redis.lifo");
            if (lifo != null) {
                config.setLifo(Boolean.parseBoolean(lifo));
            }
            String maxIdle = p.getProperty("redis.maxIdle");
            if (maxIdle != null) {
                config.setMaxIdle(Integer.parseInt(maxIdle));
            }
            String maxTotal = p.getProperty("redis.maxTotal");
            if (maxTotal != null) {
                config.setMaxTotal(Integer.parseInt(maxTotal));
            }
            String maxWaitMillis = p.getProperty("redis.maxWaitMillis");
            if (maxWaitMillis != null) {
                config.setMaxWaitMillis(Long.parseLong(maxWaitMillis));
            }
            String minEvictableIdleTimeMillis = p.getProperty("redis.minEvictableIdleTimeMillis");
            if (minEvictableIdleTimeMillis != null) {
                config.setMinEvictableIdleTimeMillis(Long.parseLong(minEvictableIdleTimeMillis));
            }
            String minIdle = p.getProperty("redis.minIdle");
            if (minIdle != null) {
                config.setMinIdle(Integer.parseInt(minIdle));
            }
            String numTestsPerEvictionRun = p.getProperty("redis.numTestsPerEvictionRun");
            if (numTestsPerEvictionRun != null) {
                config.setNumTestsPerEvictionRun(Integer.parseInt(numTestsPerEvictionRun));
            }
            String softMinEvictableIdleTimeMillis = p.getProperty("redis.softMinEvictableIdleTimeMillis");
            if (softMinEvictableIdleTimeMillis != null) {
                config.setSoftMinEvictableIdleTimeMillis(Long.parseLong(softMinEvictableIdleTimeMillis));
            }
            String testOnBorrow = p.getProperty("redis.testOnBorrow");
            if (testOnBorrow != null) {
                config.setTestOnBorrow(Boolean.parseBoolean(testOnBorrow));
            }
            String testWhileIdle = p.getProperty("redis.testWhileIdle");
            if (testWhileIdle != null) {
                config.setTestWhileIdle(Boolean.parseBoolean(testWhileIdle));
            }
            String timeBetweenEvictionRunsMillis = p.getProperty("redus.timeBetweenEvictionRunsMillis");
            if (timeBetweenEvictionRunsMillis != null) {
                config.setTimeBetweenEvictionRunsMillis(Long.parseLong(timeBetweenEvictionRunsMillis));
            }
            jedisPool = new JedisPool(config, host, port, poolTimeOut, auth);
        }
 
    }
 
    public static Jedis getJedis() {
        return jedisPool.getResource();
    }
 
    public static void closeJedis(Jedis jedis) {
        if (jedis != null) {
            jedis.close();
        }
    }
 
}

redis.properties源码:

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#redis地址
redis.host=localhost
#redis端口号
redis.port=6379
#redis的密码
#redis.auth=
 
#是否使用JedisPool默认的配置,确定true,默认true
#defaultSetting=false;
#jedisPool的timeout时间,默认2000
#connectionTimeOut=
#连接耗尽时是否阻塞, false报异常,ture阻塞直到超时, 默认true
#redis.blockWhenExhausted=true
#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)
#redis.evictionPolicyClassName=org.apache.commons.pool2.impl.DefaultEvictionPolicy
#是否启用pool的jmx管理功能, 默认true
#redis.jmxEnabled=true
#是否启用后进先出, 默认true
#redis.lifo=true
#最大空闲连接数, 默认8
#redis.maxIdle=8   
#最大连接数, 默认8
#redis.maxTotal=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
#redis.maxWaitMillis=-1
#逐出连接的最小空闲时间 默认1800000毫秒(30分钟)
#redis.minEvictableIdleTimeMillis=1800000
#最小空闲连接数, 默认0
#redis.minIdle=0
#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
#redis.numTestsPerEvictionRun=3
#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)  
#redis.softMinEvictableIdleTimeMillis=1800000
#在获取连接的时候检查有效性, 默认false
#redis.testOnBorrow=false
#在空闲时检查有效性, 默认false
#redis.testWhileIdle=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
#redus.timeBetweenEvictionRunsMillis=-1

JedisUtil源码:

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package com.bsy.common;
 
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
 
import com.alibaba.fastjson.JSON;
import com.dyuproject.protostuff.LinkedBuffer;
import com.dyuproject.protostuff.ProtostuffIOUtil;
import com.dyuproject.protostuff.runtime.RuntimeSchema;
 
import redis.clients.jedis.Jedis;
import redis.clients.jedis.exceptions.JedisDataException;
 
/**
 * jedis的帮助工具 本类map依赖fastjson,对象与集合使用protostuff序列化框架 jedis版本2.9.0
 * protostuff相关版本1.0.8 fastjson版本1.2.32 使用maven自动添加依赖
 *
 * @author Mirren
 *
 */
public class JedisUtil {
    private static final int DEFAULT_SETEX_TIMEOUT = 60 * 60;// setex的默认时间
 
    /**
     * 添加一个字符串值,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     */
    public static int set(String key, String value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            if (jedis.set(key, value).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
 
    }
 
    /**
     * 缓存一个字符串值,成功返回1,失败返回0,默认缓存时间为1小时,以本类的常量DEFAULT_SETEX_TIMEOUT为准
     *
     * @param key
     * @param value
     * @return
     */
    public static int setEx(String key, String value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            if (jedis.setex(key, DEFAULT_SETEX_TIMEOUT, value).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个字符串值,成功返回1,失败返回0,缓存时间以timeout为准,单位秒
     *
     * @param key
     * @param value
     * @param timeout
     * @return
     */
    public static int setEx(String key, String value, int timeout) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            if (jedis.setex(key, timeout, value).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个指定类型的对象,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     */
    public static <T> int set(String key, T value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            byte[] data = enSeri(value);
            if (jedis.set(key.getBytes(), data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个指定类型的对象,成功返回1,失败返回0,默认缓存时间为1小时,以本类的常量DEFAULT_SETEX_TIMEOUT为准
     *
     * @param key
     * @param value
     * @return
     */
    public static <T> int setEx(String key, T value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            byte[] data = enSeri(value);
            if (jedis.setex(key.getBytes(), DEFAULT_SETEX_TIMEOUT, data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个指定类型的对象,成功返回1,失败返回0,缓存时间以timeout为准,单位秒
     *
     * @param key
     * @param value
     * @param timeout
     * @return
     */
    public static <T> int setEx(String key, T value, int timeout) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            byte[] data = enSeri(value);
            if (jedis.setex(key.getBytes(), timeout, data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 将一个数值+1,成功返回+后的结果,失败返回null
     *
     * @param key
     * @return
     * @throws JedisDataException
     */
    public static Long incr(String key) throws JedisDataException {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            return jedis.incr(key);
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 将一个数值-1,成功返回-后的结果,失败返回null
     *
     * @param key
     * @return
     * @throws JedisDataException
     */
    public static Long decr(String key) throws JedisDataException {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            return jedis.decr(key);
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个字符串值到list中,,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     */
    public static int setList(String key, String... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            Long result = jedis.rpush(key, value);
            if (result != null && result != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个字符串值到list中,全部list的key默认缓存时间为1小时,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     */
    public static int setExList(String key, String... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            Long result = jedis.rpush(key, value);
            jedis.expire(key, DEFAULT_SETEX_TIMEOUT);
            if (result != null && result != 0) {
                return 1;
            } else {
                return 0;
            }
 
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个字符串值到list中,全部list的key缓存时间为timeOut,单位为秒,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     */
    public static int setExList(String key, int timeOut, String... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            Long result = jedis.rpush(key, value);
            jedis.expire(key, timeOut);
            if (result != null && result != 0) {
                return 1;
            } else {
                return 0;
            }
 
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个<T>类型对象值到list中,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     */
    @SafeVarargs
    public static <T> int setList(String key, T... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            int res = 0;
            for (T t : value) {
                byte[] data = enSeri(t);
                Long result = jedis.rpush(key.getBytes(), data);
                if (result != null && result != 0) {
                    res++;
                }
            }
            if (res != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个<T>类型对象值到list中,全部list的key默认缓存时间为1小时,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     */
    @SafeVarargs
    public static <T> int setExList(String key, T... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            int res = 0;
            for (T t : value) {
                byte[] data = enSeri(t);
                Long result = jedis.rpush(key.getBytes(), data);
                if (result != null && result != 0) {
                    res++;
                }
            }
            jedis.expire(key, DEFAULT_SETEX_TIMEOUT);
            if (res != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个<T>类型对象值到list中,全部list的key缓存时间为timeOut,单位秒,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     */
    @SafeVarargs
    public static <T> int setExList(String key, int timeOut, T... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            int res = 0;
            for (T t : value) {
                byte[] data = enSeri(t);
                Long result = jedis.rpush(key.getBytes(), data);
                if (result != null && result != 0) {
                    res++;
                }
            }
            jedis.expire(key, timeOut);
            if (res != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个List集合成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @return
     * @throws IOException
     * @throws RuntimeException
     */
    public static <T> int setList(String key, List<T> value) throws RuntimeException, IOException {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            byte[] data = enSeriList(value);
            if (jedis.set(key.getBytes(), data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个List<T>集合,成功返回1,失败返回0,默认缓存时间为1小时,以本类的常量DEFAULT_SETEX_TIMEOUT为准
     *
     * @param key
     * @param value
     * @return
     * @throws IOException
     * @throws RuntimeException
     */
 
    public static <T> int setExList(String key, List<T> value) throws RuntimeException, IOException {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            byte[] data = enSeriList(value);
            if (jedis.setex(key.getBytes(), DEFAULT_SETEX_TIMEOUT, data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个List<T>集合,成功返回1,失败返回0,缓存时间以timeout为准,单位秒
     *
     * @param key
     * @param value
     * @param timeout
     * @return
     * @throws IOException
     * @throws RuntimeException
     */
    public static <T> int setExList(String key, List<T> value, int timeout) throws RuntimeException, IOException {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            byte[] data = enSeriList(value);
            if (jedis.setex(key.getBytes(), timeout, data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个字符串到set,如果key存在就在就最追加,如果key不存在就创建,成功返回1,失败或者没有受影响返回0
     *
     * @param key
     * @param value
     * @return
     */
    public static int setSet(String key, String... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            Long result = jedis.sadd(key, value);
            if (result != null && result != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个字符串set,如果key存在就在就最追加,整个set的key默认一小时后过期,如果key存在就在可以种继续添加,如果key不存在就创建,成功返回1,失败或者没有受影响返回0
     *
     * @param key
     * @param value
     * @return
     */
    public static int setExSet(String key, String... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            Long result = jedis.sadd(key, value);
            jedis.expire(key, DEFAULT_SETEX_TIMEOUT);
            if (result != null && result != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个字符串set,如果key存在就在就最追加,整个set的key有效时间为timeOut时间,单位秒,如果key存在就在可以种继续添加,如果key不存在就创建,,成功返回1,失败或者没有受影响返回0
     *
     * @param key
     * @param value
     * @return
     */
    public static int setExSet(String key, int timeOut, String... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            Long result = jedis.sadd(key, value);
            jedis.expire(key, timeOut);
            if (result != null && result != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个<T>类型到set集合,如果key存在就在就最追加,成功返回1,失败或者没有受影响返回0
     *
     * @param key
     * @param value
     * @return
     */
    @SafeVarargs
    public static <T> int setSet(String key, T... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            int res = 0;
            for (T t : value) {
                byte[] data = enSeri(t);
                Long result = jedis.sadd(key.getBytes(), data);
                if (result != null && result != 0) {
                    res++;
                }
            }
            if (res != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个<T>类型到set集合,如果key存在就在就最追加,整个set的key默认有效时间为1小时,成功返回1,失败或者没有受影响返回0
     *
     * @param key
     * @param value
     * @return
     */
    @SafeVarargs
    public static <T> int setExSet(String key, T... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            int res = 0;
            for (T t : value) {
                byte[] data = enSeri(t);
                Long result = jedis.sadd(key.getBytes(), data);
                if (result != null && result != 0) {
                    res++;
                }
            }
            jedis.expire(key, DEFAULT_SETEX_TIMEOUT);
            if (res != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个<T>类型到set集合,如果key存在就在就最追加,整个set的key有效时间为timeOut,单位秒,成功返回1,失败或者没有受影响返回0
     *
     * @param key
     * @param value
     * @return
     */
    @SafeVarargs
    public static <T> int setExSet(String key, int timeOut, T... value) {
        if (isValueNull(key, value)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            int res = 0;
            for (T t : value) {
                byte[] data = enSeri(t);
                Long result = jedis.sadd(key.getBytes(), data);
                if (result != null && result != 0) {
                    res++;
                }
            }
            jedis.expire(key, timeOut);
            if (res != 0) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 添加一个Map<K, V>集合,成功返回1,失败返回0
     *
     * @param key
     * @param value
     * @param timeout
     * @return
     */
    public static <K, V> int setMap(String key, Map<K, V> value) {
        if (value == null || key == null || "".equals(key)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            String data = JSON.toJSONString(value);
            if (jedis.set(key, data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个Map<K, V>集合,成功返回1,失败返回0,默认缓存时间为1小时,以本类的常量DEFAULT_SETEX_TIMEOUT为准
     *
     * @param key
     * @param value
     * @param timeout
     * @return
     */
    public static <K, V> int setExMap(String key, Map<K, V> value) {
        if (value == null || key == null || "".equals(key)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            String data = JSON.toJSONString(value);
            if (jedis.setex(key, DEFAULT_SETEX_TIMEOUT, data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 缓存一个Map<K, V>集合,成功返回1,失败返回0,缓存时间以timeout为准,单位秒
     *
     * @param key
     * @param value
     * @param timeout
     * @return
     */
    public static <K, V> int setExMap(String key, Map<K, V> value, int timeout) {
        if (value == null || key == null || "".equals(key)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            String data = JSON.toJSONString(value);
            if (jedis.setex(key, timeout, data).equalsIgnoreCase("ok")) {
                return 1;
            } else {
                return 0;
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获取一个字符串值
     *
     * @param key
     * @return
     */
    public static String get(String key) {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            return jedis.get(key);
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得一个指定类型的对象
     *
     * @param key
     * @param value
     * @return
     */
    public static <T> T get(String key, Class<T> clazz) {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
 
            byte[] data = jedis.get(key.getBytes());
            T result = deSeri(data, clazz);
            return result;
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得一个字符串集合,区间以偏移量 START 和 END 指定。 其中 0 表示列表的第一个元素, 1
     * 表示列表的第二个元素,以此类推。 你也可以使用负数下标,以 -1 表示列表的最后一个元素, -2 表示列表的倒数第二个元素,以此类推。
     *
     * @param key
     * @param start
     * @param end
     * @return
     */
    public static List<String> getList(String key, long start, long end) {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            List<String> result = jedis.lrange(key, start, end);
            return result;
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得一个<T>类型的对象集合,区间以偏移量 START 和 END 指定。 其中 0 表示列表的第一个元素, 1 表示列表的第二个元素,以此类推。
     * 你也可以使用负数下标,以 -1 表示列表的最后一个元素, -2 表示列表的倒数第二个元素,以此类推。
     *
     * @param key
     * @param start
     * @param end
     * @return
     */
    public static <T> List<T> getList(String key, long start, long end, Class<T> clazz) {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            List<byte[]> lrange = jedis.lrange(key.getBytes(), start, end);
            List<T> result = null;
            if (lrange != null) {
                for (byte[] data : lrange) {
                    if (result == null) {
                        result = new ArrayList<>();
                    }
                    result.add(deSeri(data, clazz));
                }
            }
            return result;
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得list中存了多少个值
     *
     * @return
     */
    public static long getListCount(String key) {
        if (isValueNull(key)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            return jedis.llen(key);
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得一个List<T>的集合,
     *
     * @param key
     *            键
     * @param clazz
     *            返回集合的类型
     * @return
     * @throws IOException
     */
    public static <T> List<T> getList(String key, Class<T> clazz) throws IOException {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            byte[] data = jedis.get(key.getBytes());
            List<T> result = deSeriList(data, clazz);
            return result;
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得一个字符串set集合
     *
     * @param key
     * @return
     */
    public static Set<String> getSet(String key) {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            Set<String> result = jedis.smembers(key);
            return result;
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得一个字符串set集合
     *
     * @param key
     * @return
     */
    public static <T> Set<T> getSet(String key, Class<T> clazz) {
        if (isValueNull(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            Set<byte[]> smembers = jedis.smembers(key.getBytes());
            Set<T> result = null;
            if (smembers != null) {
                for (byte[] data : smembers) {
                    if (result == null) {
                        result = new HashSet<>();
                    }
                    result.add(deSeri(data, clazz));
                }
            }
            return result;
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得集合中存在多少个值
     *
     * @param key
     * @return
     */
    public static long getSetCount(String key) {
        if (isValueNull(key)) {
            return 0;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            return jedis.scard(key);
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 获得一个Map<v,k>的集合
     *
     * @param key
     * @param v
     * @param k
     * @return
     */
    public static <K, V> Map<K, V> getMap(String key, Class<K> k, Class<V> v) {
        if (key == null || "".equals(key)) {
            return null;
        }
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            String data = jedis.get(key);
            @SuppressWarnings("unchecked")
            Map<K, V> result = (Map<K, V>) JSON.parseObject(data);
            return result;
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    /**
     * 删除一个值
     *
     * @param key
     */
    public static void del(String... key) {
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtil.getJedis();
            for (int i = 0; i < key.length; i++) {
                jedis.del(key);
            }
        } finally {
            JedisPoolUtil.closeJedis(jedis);
        }
    }
 
    // --------------------------公用方法区------------------------------------
    /**
     * 检查值是否为null,如果为null返回true,不为null返回false
     *
     * @param obj
     * @return
     */
    private static boolean isValueNull(Object... obj) {
        for (int i = 0; i < obj.length; i++) {
            if (obj[i] == null || "".equals(obj[i])) {
                return true;
            }
        }
        return false;
    }
 
    /**
     * 序列化一个对象
     *
     * @param value
     * @return
     */
    private static <T> byte[] enSeri(T value) {
        @SuppressWarnings("unchecked")
        RuntimeSchema<T> schema = (RuntimeSchema<T>) RuntimeSchema.createFrom(value.getClass());
        byte[] data = ProtostuffIOUtil.toByteArray(value, schema,
                LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE));
        return data;
    }
 
    /**
     * 反序列化一个对象
     *
     * @param t
     * @return
     */
    private static <T> T deSeri(byte[] data, Class<T> clazz) {
        if (data == null || data.length == 0) {
            return null;
        }
        RuntimeSchema<T> schema = RuntimeSchema.createFrom(clazz);
        T result = schema.newMessage();
        ProtostuffIOUtil.mergeFrom(data, result, schema);
        return result;
    }
 
    /**
     * 序列化List集合
     *
     * @param list
     * @return
     * @throws IOException
     */
    private static <T> byte[] enSeriList(List<T> list) throws RuntimeException, IOException {
        if (list == null || list.size() == 0) {
            throw new RuntimeException("集合不能为空!");
        }
        @SuppressWarnings("unchecked")
        RuntimeSchema<T> schema = (RuntimeSchema<T>) RuntimeSchema.getSchema(list.get(0).getClass());
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ProtostuffIOUtil.writeListTo(out, list, schema, LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE));
        byte[] byteArray = out.toByteArray();
        return byteArray;
    }
 
    /**
     * 反序列化List集合
     *
     * @param data
     * @param clazz
     * @return
     * @throws IOException
     */
    private static <T> List<T> deSeriList(byte[] data, Class<T> clazz) throws IOException {
        if (data == null || data.length == 0) {
            return null;
        }
        RuntimeSchema<T> schema = RuntimeSchema.createFrom(clazz);
        List<T> result = ProtostuffIOUtil.parseListFrom(new ByteArrayInputStream(data), schema);
        return result;
    }
 
}

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原文链接:https://blog.csdn.net/miniduhua/article/details/76219737

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