internship：其他配置类的编写

整体的项目架构相比之前写的demo多了其他的配置，比如涉及硬件，需要编写有关于硬件的代码；涉及遥感获取地理信息需要编写引用高德api来实现；此外还有其他一些零零碎碎需要编写的功能，使整个项目体系更为完整。但是唯一不变的还是 controller service及其对应的实现类 之后对应另一个service层 编写相应的mapper，最开始的都是打框架。

RedisConfig:

/** * redis配置 @EnableCaching @Configuration public class RedisConfig extends CachingConfigurerSupport { /** * 生成key的策略 */
    @Bean
    @Override
    public KeyGenerator keyGenerator() {
    
        return (target, method, params) -> {
    
            StringBuilder sb = new StringBuilder();
            sb.append(method.getName());
            for (Object obj : params) {
    
                sb.append("_").append(obj.toString());
            }
            return sb.toString();
        };
    }

    /** * 缓存管理器 */
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
    
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = jackson2JsonRedisSerializer();
        RedisCacheConfiguration redisCacheConfiguration =
                RedisCacheConfiguration.defaultCacheConfig()
                        .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                        .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                        .entryTtl(Duration.ofHours(1));
        return RedisCacheManager
                .builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
                .cacheDefaults(redisCacheConfiguration).build();
    }

    /** * RedisTemplate配置 */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
    
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = jackson2JsonRedisSerializer();
        //序列化 value 时使用此序列化方法
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        // 序列化 key 时
        StringRedisSerializer srs = new StringRedisSerializer();
        template.setKeySerializer(srs);
        template.setHashKeySerializer(srs);
        template.afterPropertiesSet();
        return template;
    }

    public Jackson2JsonRedisSerializer jackson2JsonRedisSerializer() {
    
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        jackson2JsonRedisSerializer.setObjectMapper(new ObjectMapper()
                .setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY)
                //解决jackson2无法反序列化LocalDate、 LocalDateTime的问题
                .disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
                .registerModule(new JavaTimeModule())
                //设置存入缓存时按具体的类型存入
                .activateDefaultTyping(LaissezFaireSubTypeValidator.instance,
                        ObjectMapper.DefaultTyping.NON_FINAL,
                        JsonTypeInfo.As.WRAPPER_ARRAY));
        return jackson2JsonRedisSerializer;
    }
}

WebMvcConfigurer配置类其实是Spring内部的一种配置方式，采用JavaBean的形式来代替传统的xml配置文件形式进行针对框架个性化定制，可以自定义一些Handler，Interceptor，ViewResolver，MessageConverter。基于java-based方式的spring mvc配置，需要创建一个配置类并实现WebMvcConfigurer 接口；

webconfig:

@Configuration
public class WebConfig implements WebMvcConfigurer {
    

    @Value("${server.file-upload-path}")
    private String filePath;
    /** * * @param registry */
    @Override
    public void addCorsMappings(CorsRegistry registry) {
    
        registry.addMapping("/**")
                .allowedOriginPatterns("*")
                .allowedHeaders("*")
                .allowedMethods("*")
                .allowCredentials(true);
    }

    /** * 静态路径 * @param registry */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
    
        //在默认"/**"静态文件映射上添加"file: filePath/"
        registry.addResourceHandler("/**").addResourceLocations("classpath:/static/", "/","file:" + filePath);
    }

    /** * 文件上传临时目录 * @return */
    @Bean
    MultipartConfigElement multipartConfigElement() {
    
        MultipartConfigFactory factory = new MultipartConfigFactory();
        String tmpPath = filePath + File.separator + "temp" + File.separator;
        File file = new File(tmpPath);
        if (!file.exists()) {
    
            file.mkdirs();
        }
        factory.setLocation(tmpPath);
        return factory.createMultipartConfig();
    }
}