jedis链接redis_redis和jedis关系

<dependencies>
  	<dependency>
  		<groupId>redis.clients</groupId>
  		<artifactId>jedis</artifactId>
  		<version>3.2.0</version>
  	</dependency>
  	<!-- fastjson -->
  	<dependency>
  		<groupId>com.alibaba</groupId>
  		<artifactId>fastjson</artifactId>
  		<version>1.2.62</version>
  	</dependency>
  </dependencies>

Jedis jedis=new Jedis("192.168.1.1",6379); //第一个引号里填linux主机ip地址，如果是本地redis，那么就是127.0.0.1，第二个填端口号
jedis.auth("123456"); //redis连接密码，如果没有可以省略
System.out.println(jedis.ping());

Jedis jedis=new Jedis("192.168.1.1",6379);
System.out.println("清空数据:"+jedis.flushDB());
System.out.println("判断某个键是否存在:"+jedis.exists("username"));
System.out.println("新增<'username,'zhangsan'>键值对:"+jedis.set("username", "zhangsan"));
System.out.println("新增<'password,'123456'>键值对:"+jedis.set("password", "123456"));
System.out.println("系统中所有键:"+jedis.keys("*"));
System.out.println("删除键password:"+jedis.del("password"));
System.out.println("判断password是否存在:"+jedis.exists("password"));
System.out.println("查看键username储存的值的类型:"+jedis.type("username"));
System.out.println("查看键username中存储的数据:"+jedis.get("username"));
System.out.println("查看当前key的数量:"+jedis.dbSize());

        //获取Jedis对象
		Jedis jedis=new Jedis("192.168.1.1",6379);
		//设置json数据
		JSONObject jsonObject= new JSONObject();
		jsonObject.put("username", "张三");
		jsonObject.put("password", "12346");
		String user=jsonObject.toJSONString();
		//开启事务
		Transaction multi=jedis.multi();
		try {
			multi.set("user", user);
			multi.exec();  //提交事务
		} catch (Exception e) {
			multi.discard(); //放弃事务
		}finally {
			System.out.println(jedis.get("user"));
			jedis.close(); //关闭连接
		}