RedisUtils工具类

package com.zyjournals.web.front.module.utils;

import com.alibaba.fastjson.JSON;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.Set;
import java.util.concurrent.TimeUnit;

/**
 * Redis工具类
 * @author ZTY
 */
@Component
public class RedisUtils
{

    @Resource(name = "stringRedisTemplate")
    private ValueOperations<String, String> valueOperations;

    /**  默认过期时长，单位：秒 */
    public final static long                DEFAULT_EXPIRE = 60 * 60 * 24;

    /**  不设置过期时长 */
    public final static long                NOT_EXPIRE     = -1;

    /**
     * 插入缓存默认时间
     * @param key 键
     * @param value 值
     * @author zmr
     */
    public void set(String key, Object value)
    {
        set(key, value, DEFAULT_EXPIRE);
    }

    /**
     * 插入缓存
     * @param key 键
     * @param value 值
     * @param expire 过期时间(s)
     * @author zmr
     */
    public void set(String key, Object value, long expire)
    {

        //时间大于0时，设置过期时间
        if(expire > 0){
            valueOperations.set(key,toJson(value), expire, TimeUnit.SECONDS);
        }else {
            valueOperations.set(key, toJson(value));
        }
    }

    /**
     * 返回字符串结果
     * @param key 键
     * @return
     * @author zmr
     */
    public String get(String key)
    {
        return valueOperations.get(key);
    }

    /**
     * 返回指定类型结果
     * @param key 键
     * @param clazz 类型class
     * @return
     * @author zmr
     */
    public <T> T get(String key, Class<T> clazz)
    {
        String value = valueOperations.get(key);
        return value == null ? null : fromJson(value, clazz);
    }

    /**
     * 删除缓存
     * @param key 键
     * @author zmr
     */
    public void delete(String key)
    {
        valueOperations.getOperations().delete(key);
    }

    /**
     *  查找匹配的key
     * @param pattern
     * @return
     */
    public Set<String> keys(String pattern){
        return valueOperations.getOperations().keys(pattern);
    }
    /**
     * 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> T fromJson(String json, Class<T> clazz)
    {
        return JSON.parseObject(json, clazz);
    }

}