Redis - Java

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Before you start using Redis in your Java programs, you need to make sure that you have Redis Java driver and Java set up on the machine. You can check our Java tutorial for Java installation on your machine.

Installation

Now, let us see how to set up Redis Java driver.

  • You need to download the jar from the path Download jedis.jar. Make sure to download the latest release of it.

  • You need to include the jedis.jar into your classpath.

Connect to Redis Server

import redis.clients.jedis.Jedis; 

public class RedisJava { 
   public static void main(String[] args) { 
      //Connecting to Redis server on localhost 
      Jedis jedis = new Jedis("localhost"); 
      System.out.println("Connection to server sucessfully"); 
      //check whether server is running or not 
      System.out.println("Server is running: "+jedis.ping()); 
   } 
}

Now, let's compile and run the above program to test the connection to Redis server. You can change your path as per your requirement. We are assuming the current version of jedis.jar is available in the current path.

$javac RedisJava.java 
$java RedisJava 
Connection to server sucessfully 
Server is running: PONG

Redis Java String Example

import redis.clients.jedis.Jedis; 

public class RedisStringJava { 
   public static void main(String[] args) { 
      //Connecting to Redis server on localhost 
      Jedis jedis = new Jedis("localhost"); 
      System.out.println("Connection to server sucessfully"); 
      //set the data in redis string 
      jedis.set("tutorial-name", "Redis tutorial"); 
      // Get the stored data and print it 
      System.out.println("Stored string in redis:: "+ jedis.get("tutorial-name")); 
   } 
}

Now, let's compile and run the above program.

$javac RedisStringJava.java 
$java RedisStringJava 
Connection to server sucessfully 
Stored string in redis:: Redis tutorial

Redis Java List Example

import redis.clients.jedis.Jedis; 

public class RedisListJava { 
   public static void main(String[] args) { 
   
      //Connecting to Redis server on localhost 
      Jedis jedis = new Jedis("localhost"); 
      System.out.println("Connection to server sucessfully"); 
      
      //store data in redis list 
      jedis.lpush("tutorial-list", "Redis"); 
      jedis.lpush("tutorial-list", "Mongodb"); 
      jedis.lpush("tutorial-list", "Mysql"); 
      // Get the stored data and print it 
      List<String> list = jedis.lrange("tutorial-list", 0 ,5); 
      
      for(int i = 0; i<list.size(); i++) { 
         System.out.println("Stored string in redis:: "+list.get(i)); 
      } 
   } 
}

Now, let's compile and run the above program.

$javac RedisListJava.java 
$java RedisListJava 
Connection to server sucessfully 
Stored string in redis:: Redis 
Stored string in redis:: Mongodb 
Stored string in redis:: Mysql

Redis Java Keys Example

import redis.clients.jedis.Jedis; 

public class RedisKeyJava { 
   public static void main(String[] args) { 
   
      //Connecting to Redis server on localhost 
      Jedis jedis = new Jedis("localhost"); 
      System.out.println("Connection to server sucessfully"); 
      //store data in redis list 
      // Get the stored data and print it 
      List<String> list = jedis.keys("*"); 
      
      for(int i = 0; i<list.size(); i++) { 
         System.out.println("List of stored keys:: "+list.get(i)); 
      } 
   } 
}

Now, let's compile and run the above program.

$javac RedisKeyJava.java 
$java RedisKeyJava 
Connection to server sucessfully 
List of stored keys:: tutorial-name 
List of stored keys:: tutorial-list
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