Java連線Redis

在Java程式中使用Redis之前，需要確保在機器上安裝了Redis的Java驅動程式和Java環境。可以先在將Java電腦上並組態好環境。

安裝

現在，讓我們看看如何設定Redis Java驅動程式。

• 下載jedis.jar - http://repo1.maven.org/maven2/redis/clients/jedis/2.1.0/jedis-2.1.0-sources.jar ，確保下載的jedis.jar是最新版本。
• 將jedis.jar包含到類路徑中。

Java連線到Redis伺服器

請參考以下一個簡單的範例程式碼 -

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()); 
   } 
}

現在，編譯並執行上面的程式來測試與Redis伺服器的連線。可以根據需要更改路徑。假設jedis.jar的當前版本在當前路徑中可以使用。
執行上面程式碼，將生成以下結果 -

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

Redis Java字串範例

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("tutorialname")); 
   } 
}

執行上面程式碼，將生成以下結果 -

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

Redis Java列表範例

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)); 
      } 
   } 
}

執行上面程式碼，將生成以下結果 -

$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鍵範例

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)); 
      } 
   } 
}

執行上面程式碼，將生成以下結果 -

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