整合Redis

引入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

配置文件

application.yaml

spring:
  redis:
    host: 127.0.0.1

StringRedisTemplate使用

@SpringBootTest
class SpringbootIntegrationFrameworkApplicationTests {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Test
    void contextLoads() {

        BoundValueOperations<String, String> user = stringRedisTemplate.boundValueOps("user");

        user.set("1");
        user.increment();
        String s = user.get();

        System.out.println(s);

        user.decrement();

        user.setIfAbsent("123");
        user.setIfPresent("222333");

        System.out.println(user.get());
    }
}

结果

2
222333

查看redis（使用的是Windows的RDM软件）：

image-20210512170131129

整合自定义RedisTemplate

使用StringRedisTemplate

变成String是一种序列化。

使用jackson先把对象转化成JSON字符串。然后把字符串存到redis中。读取redis中的数据时，读到的是字符串，使用工具转成对象。

@SpringBootTest
class SpringbootIntegrationFrameworkApplicationTests {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Test
    void contextLoads() throws JsonProcessingException {
        BoundHashOperations<String, Object, Object> users = stringRedisTemplate.boundHashOps("users");

        User user = new User(10L, "赵六", "123456", "sdghg", new Date(), 10, new Date(), new Date());

        ObjectMapper objectMapper = new ObjectMapper();
        String userStr = objectMapper.writeValueAsString(user);

        users.put("user:1", userStr);

        String user1 = (String) users.get("user:1");
        System.out.println(user1);

        // 将从redis读取的字符串转成User对象
        User user2 = objectMapper.readValue(user1, User.class);
        System.out.println(user2);
    }

}

结果

{"id":10,"username":"赵六","password":"123456","salt":"sdghg","birth":1620821229457,"deptId":10,"createTime":1620821229457,"updateTime":1620821229457}
User(id=10, username=赵六, password=123456, salt=sdghg, birth=Wed May 12 20:07:09 CST 2021, deptId=10, createTime=Wed May 12 20:07:09 CST 2021, updateTime=Wed May 12 20:07:09 CST 2021)

查看redis

image-20210512200433285

使用RedisTemplate

变成二进制是一种序列化。

@SpringBootTest
class SpringbootIntegrationFrameworkApplicationTests {

    @Resource
    private RedisTemplate<String, Object> redisTemplate;

    @Test
    void contextLoads() throws JsonProcessingException {
        User user = new User(10L, "赵六", "123456", "sdghg", new Date(), 10, new Date(), new Date());

        BoundValueOperations<String, Object> a = redisTemplate.boundValueOps("a");

        a.set(user);

        System.out.println(a.get());
    }

}

结果

User(id=10, username=赵六, password=123456, salt=sdghg, birth=Wed May 12 20:23:43 CST 2021, deptId=10, createTime=Wed May 12 20:23:43 CST 2021, updateTime=Wed May 12 20:23:43 CST 2021)

查看redis

image-20210512202435160

自定义RedisTemplate实现存取数据

config配置类

@Configuration
public class RedisConfig {

    @Bean("MyRedisTemplate")
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory){
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(factory);
        // 设置序列化的方式
        redisTemplate.setKeySerializer(RedisSerializer.string());
        redisTemplate.setHashKeySerializer(RedisSerializer.string());
        redisTemplate.setValueSerializer(RedisSerializer.json());
        redisTemplate.setHashValueSerializer(RedisSerializer.json());

        return redisTemplate;
    }

}

使用

@SpringBootTest
class SpringbootIntegrationFrameworkApplicationTests {

    @Autowired
    @Qualifier("MyRedisTemplate")
    private RedisTemplate<String, Object> redisTemplate;

    @Test
    void contextLoads() throws JsonProcessingException {
        User user = new User(10L, "赵六", "123456", "sdghg", new Date(), 10, new Date(), new Date());

        BoundValueOperations<String, Object> b = redisTemplate.boundValueOps("b");

        b.set(user);

        System.out.println(b.get());
    }

}

结果：

User(id=10, username=赵六, password=123456, salt=sdghg, birth=Wed May 12 20:36:22 CST 2021, deptId=10, createTime=Wed May 12 20:36:22 CST 2021, updateTime=Wed May 12 20:36:22 CST 2021)

查看redis：

image-20210512203648951