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我们下载第一个
额案后基本一路默认就行了
安装后,服务自动启动,以后也不用自动启动。
出现这个表示我们连接上了。
Spring整合Redis
引入依赖
- spring-boot-starter-data-redis
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
配置Redis
- 配置数据库参数
# RedisProperties
spring.redis.database=11#第11个库,这个随便
spring.redis.host=localhost
spring.redis.port=6379#端口
- 编写配置类,构造RedisTemplate
这个springboot已经帮我们配了,但是默认object,我想改成string
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
@Configuration
public class RedisConfig {
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(factory);
// 设置key的序列化方式
template.setKeySerializer(RedisSerializer.string());
// 设置value的序列化方式
template.setValueSerializer(RedisSerializer.json());
// 设置hash的key的序列化方式
template.setHashKeySerializer(RedisSerializer.string());
// 设置hash的value的序列化方式
template.setHashValueSerializer(RedisSerializer.json());
template.afterPropertiesSet();
return template;
}
}
访问Redis
- redisTemplate.opsForValue()
- redisTemplate.opsForHash()
- redisTemplate.opsForList()
- redisTemplate.opsForSet()
- redisTemplate.opsForZSet()
@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration(classes = CommunityApplication.class)
public class RedisTests {
@Autowired
private RedisTemplate redisTemplate;
@Test
public void testStrings() {
String redisKey = "test:count";
redisTemplate.opsForValue().set(redisKey, 1);
System.out.println(redisTemplate.opsForValue().get(redisKey));
System.out.println(redisTemplate.opsForValue().increment(redisKey));
System.out.println(redisTemplate.opsForValue().decrement(redisKey));
}
@Test
public void testHashes() {
String redisKey = "test:user";
redisTemplate.opsForHash().put(redisKey, "id", 1);
redisTemplate.opsForHash().put(redisKey, "username", "zhangsan");
System.out.println(redisTemplate.opsForHash().get(redisKey, "id"));
System.out.println(redisTemplate.opsForHash().get(redisKey, "username"));
}
@Test
public void testLists() {
String redisKey = "test:ids";
redisTemplate.opsForList().leftPush(redisKey, 101);
redisTemplate.opsForList().leftPush(redisKey, 102);
redisTemplate.opsForList().leftPush(redisKey, 103);
System.out.println(redisTemplate.opsForList().size(redisKey));
System.out.println(redisTemplate.opsForList().index(redisKey, 0));
System.out.println(redisTemplate.opsForList().range(redisKey, 0, 2));
System.out.println(redisTemplate.opsForList().leftPop(redisKey));
System.out.println(redisTemplate.opsForList().leftPop(redisKey));
System.out.println(redisTemplate.opsForList().leftPop(redisKey));
}
@Test
public void testSets() {
String redisKey = "test:teachers";
redisTemplate.opsForSet().add(redisKey, "刘备", "关羽", "张飞", "赵云", "诸葛亮");
System.out.println(redisTemplate.opsForSet().size(redisKey));
System.out.println(redisTemplate.opsForSet().pop(redisKey));
System.out.println(redisTemplate.opsForSet().members(redisKey));
}
@Test
public void testSortedSets() {
String redisKey = "test:students";
redisTemplate.opsForZSet().add(redisKey, "唐僧", 80);
redisTemplate.opsForZSet().add(redisKey, "悟空", 90);
redisTemplate.opsForZSet().add(redisKey, "八戒", 50);
redisTemplate.opsForZSet().add(redisKey, "沙僧", 70);
redisTemplate.opsForZSet().add(redisKey, "白龙马", 60);
System.out.println(redisTemplate.opsForZSet().zCard(redisKey));
System.out.println(redisTemplate.opsForZSet().score(redisKey, "八戒"));
System.out.println(redisTemplate.opsForZSet().reverseRank(redisKey, "八戒"));
System.out.println(redisTemplate.opsForZSet().reverseRange(redisKey, 0, 2));
}
@Test
public void testKeys() {
redisTemplate.delete("test:user");
System.out.println(redisTemplate.hasKey("test:user"));
redisTemplate.expire("test:students", 10, TimeUnit.SECONDS);
}
}
这样还是稍微有点麻烦,我们其实可以绑定key
// 多次访问同一个key
@Test
public void testBoundOperations() {
String redisKey = "test:count";
BoundValueOperations operations = redisTemplate.boundValueOps(redisKey);
operations.increment();
operations.increment();
operations.increment();
operations.increment();
operations.increment();
System.out.println(operations.get());
}