关于Jedis的用法以及Jedis使用Redis事务

        <!-- 导入jedis的包 -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>4.2.2</version>
        </dependency>
        <!-- fastJSON-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.50</version>
        </dependency>

public class TestPing {
    public static void main(String[] args) {
        //1、new Jedis对象即可
        Jedis jedis = new Jedis("127.0.0.1",6379);
        //Jedis所有的命令就是我们之前学习的指令！
        System.out.println(jedis.ping());;
    }
}

package com.uno;

import com.alibaba.fastjson.JSONObject;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.Transaction;

public class TestTx {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("127.0.0.1", 6379);
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("hello","world");
        jsonObject.put("name", "UNO");
        String result = jsonObject.toJSONString();
        //1、开启事务
        Transaction multi = jedis.multi();
        //jedis.watch(result);  //加乐观锁，监视
        try {
            //2、命令入队
            multi.set("user1", result);
            multi.set("user2",result);
            //3、执行，这三个步骤也都是和linux中操作redis命令一模一样
            multi.exec();
        } catch (Exception e) {
            //当出现错误，放弃事务
            multi.discard();
            throw new RuntimeException(e);
        } finally {
            System.out.println(jedis.get("user1"));
            System.out.println(jedis.get("user2"));
            //关闭连接
            jedis.close();
        }
    }
}

package com.uno;

import com.alibaba.fastjson.JSONObject;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.Transaction;

public class TestTx {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("127.0.0.1", 6379);
        jedis.flushDB(); //先清理一下数据库，免得被上面的代码在redis设置的值影响
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("hello","world");
        jsonObject.put("name", "UNO");
        String result = jsonObject.toJSONString();
        //1、开启事务
        Transaction multi = jedis.multi();
//        jedis.watch(result);  //加乐观锁，监视
        try {
            //2、命令入队
            multi.set("user1", result);
            multi.set("user2",result);
            int i = 1/0;  //手动设置一个运行时异常，看是不是会出现运行时异常，然后被catch捕获
            //3、执行，这三个步骤也都是和linux中操作redis命令一模一样
            multi.exec();
        } catch (Exception e) {
            //放弃事务
            multi.discard();
            throw new RuntimeException(e);
        } finally {
            System.out.println(jedis.get("user1"));
            System.out.println(jedis.get("user2"));
            //关闭连接
            jedis.close();
        }
    }
}

Jedis jedis = new Jedis("服务器的外网ip",6379);
jedis.auth("redis的密码");
System.out.println(jedis.ping());
（输出PONG的话就成功了）