spring-data-redis是spring-data模块的一部分,专门用来支持在spring管理项目对redis的操作,使用java操作redis最常用的是使用jedis,但并不是只有jedis可以使用,像jdbc-redis jredis也都属于redis的java客户端,他们之间是无法兼容的,如果你在一个项目中使用了jedis,然后后来决定弃用掉改用jdbc-redis就比较麻烦了,spring-data-redis提供了redis的java客户端的抽象,在开发中可以忽略掉切换具体的客户端所带来的影响,而且他本身就属于spring的一部分,比起单纯的使用jedis,更加稳定.管理起来更加自动化.(当然jedis的缺点不止以上).
引入依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> </dependency>
编写配置文件
spring: redis: host: ip地址 port: 6379 password: 密码 lettuce: pool: max-active: 8 max-idle: 8 min-idle: 0 max-wait: 100ms
编写测试类
@SpringBootTest class RedisDemoApplicationTests { @Autowired private RedisTemplate redisTemplate; @Test void testString(){ redisTemplate.opsForValue().set("name","shengyi"); Object name = redisTemplate.opsForValue().get("name"); System.out.println("name = " + name); } }
@Configuration public class RedisConfig { @Bean public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) { RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>(); //设置工厂 redisTemplate.setConnectionFactory(redisConnectionFactory); //设置序列化工具 GenericJackson2JsonRedisSerializer redisSerializer = new GenericJackson2JsonRedisSerializer(); //采用string序列化 redisTemplate.setKeySerializer(RedisSerializer.string()); redisTemplate.setHashKeySerializer(RedisSerializer.string()); //采用json序列化 redisTemplate.setValueSerializer(redisSerializer); redisTemplate.setHashValueSerializer(redisSerializer); return redisTemplate; } }
key和value的序列化默认都是String。
所以当存取对象时需要进行手动序列化
@Autowired private StringRedisTemplate stringRedisTemplate; //JSON工具 private static final ObjectMapper mapper = new ObjectMapper(); @Test void stringRedisTemplateTest() throws JsonProcessingException { Student student = new Student("枫叶", 18); //手动序列化 String s = mapper.writeValueAsString(student); //写入到redis stringRedisTemplate.opsForValue().set("student:1", s); //读取数据 String s1 = stringRedisTemplate.opsForValue().get("student:1"); //反序列化 Student student1 = mapper.readValue(s1, Student.class); System.out.println("student1 = " + student1); } @Autowired private StringRedisTemplate stringRedisTemplate; //JSON工具 private static final ObjectMapper mapper = new ObjectMapper(); @Test void stringRedisTemplateTest() throws JsonProcessingException { Student student = new Student("枫叶", 18); //手动序列化 String s = mapper.writeValueAsString(student); //写入到redis stringRedisTemplate.opsForValue().set("student:1", s); //读取数据 String s1 = stringRedisTemplate.opsForValue().get("student:1"); //反序列化 Student student1 = mapper.readValue(s1, Student.class); System.out.println("student1 = " + student1); }