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java如何使用redis

2026-03-02 23:49:46Java

使用Java操作Redis的基本方法

添加依赖

在Maven项目中引入Jedis或Lettuce客户端依赖：

<!-- Jedis -->
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>4.3.1</version>
</dependency>

<!-- Lettuce -->
<dependency>
    <groupId>io.lettuce</groupId>
    <artifactId>lettuce-core</artifactId>
    <version>6.2.3.RELEASE</version>
</dependency>

基础连接与操作（Jedis示例）

// 创建连接
Jedis jedis = new Jedis("localhost", 6379);

// 字符串操作
jedis.set("key", "value");
String value = jedis.get("key");

// 哈希操作
jedis.hset("user:1", "name", "Alice");
Map<String, String> user = jedis.hgetAll("user:1");

// 关闭连接
jedis.close();

使用连接池（JedisPool）

JedisPoolConfig poolConfig = new JedisPoolConfig();
poolConfig.setMaxTotal(10);

try (JedisPool pool = new JedisPool(poolConfig, "localhost", 6379);
     Jedis jedis = pool.getResource()) {
    jedis.sadd("tags", "Java", "Redis");
    Set<String> tags = jedis.smembers("tags");
}

Lettuce客户端示例

RedisClient client = RedisClient.create("redis://localhost:6379");
StatefulRedisConnection<String, String> connection = client.connect();

RedisCommands<String, String> commands = connection.sync();
commands.set("counter", "100");
String counter = commands.get("counter");

connection.close();
client.shutdown();

高级功能实现

使用Redis事务：

try (Jedis jedis = new Jedis("localhost")) {
    Transaction tx = jedis.multi();
    tx.set("a", "1");
    tx.incr("b");
    tx.exec();
}

发布/订阅模式：

Jedis jedis = new Jedis("localhost");
jedis.subscribe(new JedisPubSub() {
    @Override
    public void onMessage(String channel, String message) {
        System.out.println("Received: " + message);
    }
}, "channel");

Spring Data Redis整合

配置Spring Boot项目：

spring:
  redis:
    host: localhost
    port: 6379

使用RedisTemplate：

java如何使用redis

@Autowired
private RedisTemplate<String, Object> redisTemplate;

public void saveUser(User user) {
    redisTemplate.opsForValue().set("user:" + user.getId(), user);
}