Jedis的基本操作

Jedis基本使用

1. 本机连接虚拟机的Redis服务

• 修改redis的conf配置文件，使得redis可以被本地之外的机器访问

1295458-20180702232454375-651792456.png

• 关闭centos系统的防火墙

systemctl status firewalld.service # 查看防火墙状态
systemctl stop firewalld.service  # 关闭防火墙

2. 新建maven项目引入相关测试依赖

<dependencies>
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.8.1</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.56</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
</dependencies>

3. 编写测试文件，测试是否可以与redis正常交互

//基础功能测试
@Test
public void testRedis(){
    Jedis jedis = new Jedis("192.168.44.142", 6379);
    System.out.println(jedis.ping());
    System.out.println(jedis.set("name", "yorick"));
    System.out.println(jedis.set("age", "23"));
    System.out.println(jedis.get("name"));
    System.out.println(jedis.exists("name"));
    System.out.println(jedis.del("name"));
    System.out.println(jedis.keys("*"));
    System.out.println(jedis.flushDB());
    System.out.println(jedis.keys("*"));
    jedis.close();
}

4. 编写事务，测试是否可以正确执行事务操作

//事务测试
@Test
public void testMulti(){
    //构造json数据
    JSONObject jsonObject = new JSONObject();
    jsonObject.put("name","yorick");
    jsonObject.put("age",23);
    String result = jsonObject.toJSONString();
    //连接redis
    Jedis jedis = new Jedis("192.168.44.142", 6379);
    //清空数据库
    jedis.flushDB();
    //开启事务
    Transaction multi = jedis.multi();
    try {
        //设置值
        multi.set("user",result);
        //出错回滚
        //int i = 1/0;
        //提交事务
        multi.exec();
    }catch (Exception e){
        //放弃事务
        multi.discard();
        e.printStackTrace();
    }finally {
        //获取值
        System.out.println(jedis.get("user"));
        jedis.close();
    }
}

参考地址：https://www.bilibili.com/video/BV1S54y1R7SB