SpringCloud 项目中实现多模块共享配置类

超、凢脫俗 2024-04-08 13:43 10阅读 0赞

> 需求场景：
> 
> 假设存在微服A，微服B，微服C三个微服务，这三个微服务都需要使用Redis客户端，在使用时，我们需要为每个微服务配置一个`RedisConfig`类，而该配置类有些时候是一样的，并没有因为服务不同而产生差异，那么假如我三个服务都要使用Redis,那这是三个微服务都将需要配置一遍`RedisConfig`，这就造成了代码的冗余

*  **解决方案**  
    使用`@Import`注解

例：  
1.提取一个公共模块，用于存放实体类，工具类，配置类  
例：  
![在这里插入图片描述][b429aed14e2640b2b065f4b56992c749.png]  
2.在`api-commos`模块中，创建`RedisConfig`类

import com.fasterxml.jackson.annotation.JsonAutoDetect;
    import com.fasterxml.jackson.annotation.JsonTypeInfo;
    import com.fasterxml.jackson.annotation.PropertyAccessor;
    import com.fasterxml.jackson.databind.ObjectMapper;
    import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
    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.Jackson2JsonRedisSerializer;
    import org.springframework.data.redis.serializer.StringRedisSerializer;
    
    /**
     * @Description: reids配置类
     */
    @Configuration
    public class RedisConfig {
        
        @Bean(name = "redisTemplate")
        public RedisTemplate<String, Object> getRedisTemplate(RedisConnectionFactory factory) {
        
            RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();
            redisTemplate.setConnectionFactory(factory);
    
            StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
    
            redisTemplate.setKeySerializer(stringRedisSerializer); // key的序列化类型
    
            Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
            ObjectMapper objectMapper = new ObjectMapper();
            objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
            objectMapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance ,
                    ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);
            jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
            jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
    
            redisTemplate.setValueSerializer(jackson2JsonRedisSerializer); // value的序列化类型
            redisTemplate.setHashKeySerializer(stringRedisSerializer);
            redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
            redisTemplate.afterPropertiesSet();
            return redisTemplate;
        }
    }

3.导入该木块的依赖

4.在服务A，服务B, 服务C的启动类上分别引入该配置类

@Import({
        
            com.wf.apicommons.config.RedisConfig.class
    })
    public class UserManagementApplication {
        
        public static void main(String[] args) {
        
            SpringApplication.run(UserManagementApplication.class, args);
             log.info("服务A");
        }
    }

//解决引入spring注入的工具类，无法找到的错误
    @Import({
        
            com.wf.apicommons.config.RedisConfig.class
    })
    public class MessageBoardApplication {
        
        public static void main(String[] args) {
        
            SpringApplication.run(MessageBoardApplication.class, args);
            log.info("服务B");
        }
    }

[b429aed14e2640b2b065f4b56992c749.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/08/0139471c17fa4197ba1a1af9fb3d49dd.png