Java連接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電腦上並配置好環境。

安裝

現在，讓我們看看如何設置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連接到Redis伺服器

請參考以下一個簡單的示例代碼 -

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，編譯並運行上面的程式來測試與Redis伺服器的連接。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。
執行上面代碼，將生成以下結果 -

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

Redis Java字串示例

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"));
   }
}

執行上面代碼，將生成以下結果 -

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

Redis Java列表示例

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));
      }
   }
}

執行上面代碼，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鍵示例

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));
      }
   }
}

執行上面代碼，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