RedisUtil 工具类

package com..;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import redis.clients.jedis.Jedis;
public class RedisUtil {
//    redis-server.exe redis.windows.conf   --->启动 redis 
//    redis-cli.exe -h 127.0.0.1 -p 6379    ---->操作 redis
    
    public RedisUtil() {
        
    }
    private static Jedis jedis;// redis实例   jar包引入在最下方
    private static String host;//地址
    private static String port;//端口
    private static String password;//授权密码
    private static String timeout;//超时时间:单位MS
    private static String maxIdle;//最大空闲数:空闲链接数大于maxIdle时,将进行回收
    private static String maxActive;//最大连接数:能够同时建立的"最大链接个数"
    private static String maxWait;//最大等待时间:单位ms
    private static String testOnBorrow;//在获取连接时,是否验证有效性
    
    static{
        //加载properties配置文件
        Properties properties = new Properties();
        InputStream is = RedisUtil.class.getClassLoader().getResourceAsStream("redis_config.properties");
        try {
            properties.load(is);
        } catch (IOException e) {
            e.printStackTrace();
        }
        host = properties.getProperty("redis.single.host");
        port = properties.getProperty("redis.single.port");
        password = properties.getProperty("redis.password");
        timeout = properties.getProperty("redis.timeout");
        maxIdle = properties.getProperty("redis.maxIdle");
        maxActive = properties.getProperty("redis.maxActive");
        maxWait = properties.getProperty("redis.maxWait");
        testOnBorrow = properties.getProperty("redis.testOnBorrow");
        // 得到Jedis/JedisPool实例并且设置配置
        jedis = new Jedis(host,Integer.parseInt(port),Integer.parseInt(timeout));
     //jedis.auth("123456");//密码 }
/** * 写入缓存 * @param key * @param value * @return */ public static boolean set (final String key,String value){ boolean result = false; try { jedis.set(key, value); result = true; } catch (Exception e) { e.printStackTrace(); System.out.println("set cache error"); } return result ; } /** * 读取缓存 * @param key * @return */ public static String get(final String key) { String result =null; result = jedis.get(key); return result; } /** * 删除key对应的value * @param key */ public static void del(final String key) { if(key!=null&&key.length()>=1&&!key.equals("")&&jedis.exists(key)){ jedis.del(key); } } /** * 判断缓存中是否有key对应的value * @param key * @return */ public static boolean exists(final String key) { return jedis.exists(key); } /** * 写入缓存(规定缓存时间) * @param key * @param value * @param expireSecond * @return */ public static boolean set(final String key,String value,Long expireSecond) { boolean result = false; try { // NX代表不存在才set,EX代表秒,PX代表毫秒 jedis.set(key, value, "NX", "EX", expireSecond); result = true; } catch (Exception e) { e.printStackTrace(); System.out.println("set cache error on time"); } return result; } /** * <p> * 通过key向list头部添加字符串 * </p> * * @param key * @param strs * 可以使一个string 也可以使string数组 * @return 返回list的value个数 */ public static Long lpush(String key, String... strs) { Long res = null; res = jedis.lpush(key, strs); return res; } }
<!-- 引入 jedis 包驱动: -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>
原文地址:https://www.cnblogs.com/lifan12589/p/13502104.html