Getting started with Redis's Java usage

Because of the project needs, recently learned the use of Redis

Redis installation in a server CentOS environment is relatively straightforward.

If you want to install on Windows, you can refer to someone else's article

http://blog.csdn.net/renfufei/article/details/38474435

Redis login, no password is required by default, port number is 6379 by default

Use visualizer Redis-desktop-manager to view data under Windows

Redis supports the following types of data structures as a cache database:

String (string), hash (hash), list, set (set), and Zset (sorted set: Ordered set)

The project uses Java as the development language, only need to introduce Jedis, commons-pool2 two jar package, if you need to add a spring-data-redis with spring

Jedis is the object in Java that is used to manipulate Redis

The simplest way to create:

Jedis jedis=New Jedis ("192.168.1.101");

Port number is used by default, no password authentication is used

Insert a string:

Jedis.set ("name", "Gary");

Execution results, you can see the insertion of a string gary,key to name

You can also set multiple key-value pairs at once:

Jedis.mset ("name", "Gary", "Age", "$", "email", "xxxxxx.163.com");

If it is an int value, you can also add 1 directly:

JEDIS.INCR ("Age");

Determine if key exists:

System.out.println (jedis.exists ("name")); System.out.println (Jedis.exists ("name2"));

To set the expiration time for a key:

Jedis.expire ("name", 5); Expired after//5s

Second parameter unit is second

Remove the value of key:

System.out.println ("Name:" +jedis.get ("name"));

Delete key:

Jedis.del ("name");

Redis also has a feature for publishing subscriptions that can implement Message Queuing

Getting started with Redis's Java usage