如何使用 Jedis 在 Java 中使用 Redis-CFANZ编程社区

关于如何在 Java 中使用 redis 有多个客户端。在本教程中，我们将使用 Jedis，一个简单、快速的 Redis Java 客户端。我们还将使用 Maven 作为我们的构建工具，否则您可以在项目中导入 jedis 的 jar 文件。此外，这假设您已经安装了 redis 服务器，如果没有，请访问此链接以了解如何配置一个。

1.添加Jedis依赖使用Redis

我们需要在 pom.xml 中添加 jedis 依赖才能使用 jedis。在您的pom.xml中，在 Dependencies 部分下，添加

<dependency>

<groupId>redis.clients</groupId>

<artifactId>jedis</artifactId>

<version>2.4.2</version>

</dependency>

2.创建示例类

这是一个简单的 Java 类。它使用 Redis的SET和HASH命令。您可以在他们的网站上学习 Redis 中的不同命令。

JedisMain.java

import redis.clients.jedis.Jedis;

import redis.clients.jedis.JedisPool;

import redis.clients.jedis.exceptions.JedisException;

import java.util.HashMap;

import java.util.Map;

import java.util.Set;

public class JedisMain {

//address of your redis server

private static final String redisHost = "localhost";

private static final Integer redisPort = 6379;

//the jedis connection pool..

private static JedisPool pool = null;

public JedisMain() {

//configure our pool connection

pool = new JedisPool(redisHost, redisPort);

}

public void addSets() {

//let us first add some data in our redis server using Redis SET.

String key = "members";

String member1 = "Sedarius";

String member2 = "Richard";

String member3 = "Joe";

//get a jedis connection jedis connection pool

Jedis jedis = pool.getResource();

try {

//save to redis

jedis.sadd(key, member1, member2, member3);

//after saving the data, lets retrieve them to be sure that it has really added in redis

Set members = jedis.smembers(key);

for (String member : members) {

System.out.println(member);

}

} catch (JedisException e) {

//if something wrong happen, return it back to the pool

if (null != jedis) {

pool.returnBrokenResource(jedis);

jedis = null;

}

} finally {

///it's important to return the Jedis instance to the pool once you've finished using it

if (null != jedis)

pool.returnResource(jedis);

}

public void addHash() {

//add some values in Redis HASH

String key = "javapointers";

Map<String, String> map = new HashMap<>();

map.put("name", "Java Pointers");

map.put("domain", "www.javapointers.com");

map.put("description", "Learn how to program in Java");

Jedis jedis = pool.getResource();

try {

//save to redis

jedis.hmset(key, map);

//after saving the data, lets retrieve them to be sure that it has really added in redis

Map<String, String> retrieveMap = jedis.hgetAll(key);

for (String keyMap : retrieveMap.keySet()) {

System.out.println(keyMap + " " + retrieveMap.get(keyMap));

}

} catch (JedisException e) {

//if something wrong happen, return it back to the pool

if (null != jedis) {

pool.returnBrokenResource(jedis);

jedis = null;

}

} finally {

///it's important to return the Jedis instance to the pool once you've finished using it

if (null != jedis)

pool.returnResource(jedis);

}

public static void main(String[] args){

JedisMain main = new JedisMain();

main.addSets();

main.addHash();

}

3.运行Main方法

运行类文件，它应该打印以下值：

Joe

Sedarius

Richard

domain www.javapointers.com

name Java Pointers

description Learn how to program in Java

在我们的 Redis 服务器中验证这一点，以确保它确实保存了数据