redis工具类-白红宇

redis工具类

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发布时间：2019-06-09

本文共 2242 字，大约阅读时间需要 7 分钟。

import com.alibaba.fastjson.JSON;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.stereotype.Service;import javax.annotation.Resource;import java.util.concurrent.TimeUnit;/** * Redis工具类 */@Servicepublic class RedisUtils {    @Resource(name = "redisTemplate")    private RedisTemplate
     
       redisTemplate;    /**  默认过期时长，单位：秒 */    public final static long DEFAULT_EXPIRE = 60 * 60 * 24L;    /**  不设置过期时长 */    public final static long NOT_EXPIRE = -1L;    public void set(String key, Object value, long expire){        redisTemplate.opsForValue().set(key, toJson(value));        if(expire != NOT_EXPIRE){            redisTemplate.expire(key, expire, TimeUnit.SECONDS);        }    }    public void set(String key, Object value){        set(key, value, DEFAULT_EXPIRE);    }    public 
      
        T get(String key, Class
       
         clazz, long expire) {        String value = redisTemplate.opsForValue().get(key);        if(expire != NOT_EXPIRE){            redisTemplate.expire(key, expire, TimeUnit.SECONDS);        }        return value == null ? null : fromJson(value, clazz);    }    public 
        
          T get(String key, Class
         
           clazz) {        return get(key, clazz, NOT_EXPIRE);    }    public String get(String key, long expire) {        String value = redisTemplate.opsForValue().get(key);        if(expire != NOT_EXPIRE){            redisTemplate.expire(key, expire, TimeUnit.SECONDS);        }        return value;    }    public String get(String key) {        return get(key, NOT_EXPIRE);    }    public void delete(String key) {        redisTemplate.delete(key);    }    /**     * Object转成JSON数据     */    private String toJson(Object object){        if(object instanceof Integer || object instanceof Long || object instanceof Float ||                object instanceof Double || object instanceof Boolean || object instanceof String){            return String.valueOf(object);        }        return JSON.toJSONString(object);    }    /**     * JSON数据，转成Object     */    private 
          
            T fromJson(String json, Class
           
             clazz){ return JSON.parseObject(json, clazz); }}