java全局日期类型转换配置

女爷i 2024-03-22 10:23 14阅读 0赞

#### 1、为什么需要自定义日期类型转换器？ ####

在控制器接收客户端请求参数，客户端请求的数据是字符串类型

我们之所以可以使用int、double类型接收是因为框架内部类型转换器

SpringMVC关于时间类型转换并不很好，需要我们自己手动类型转换

#### 2、导入依赖 ####

<dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-core</artifactId>
        <version>5.3.8</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

#### 3、核心配置类 ####

/**
     * @author zzw
     * @description TODO 自定义时间参数出入参转换类
     * @date 2022-11-15 17:29
     */
    @Configuration
    public class DateHandlerConfig {
        
        
    	/**
         * 默认日期时间格式
         */
    	private static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
    	
        /**
         * 默认日期格式
         */
        private static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
        
        /**
         * 默认时间格式
         */
        private static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";
        
        /**
         * Date转换器
         * 采用hutool的日期解析工具类Dateutil可以匹配任意格式日期字符串
         */
        @Bean
        public Converter<String, Date> dateConverter()
        	return new Converter<String, Date>() {
        
        		@Override
                public Date convert(String source) {
        
                	return DateUtil.parse(source.trim());
               	}
             };
        }
        
        /**
         * LocalDate转换器
         */
    	@Bean
    	public Converter<String, LocalDate> localDateConverter() {
        
      		return new Converter<String, LocalDate>() {
        
          		@Override
          		public LocalDate convert(String source) {
        
              		return LocalDate.parse(source, DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT));
          		}
      		};
      
    	}
    	
    	/**
    	 * LocalTime转换器
         */
      	@Bean
    	public Converter<String, LocalTime> localTimeConverter() {
        
     		return new Converter<String, LocalTime>() {
        
          		@Override
          		public LocalTime convert(String source) {
        
              		return LocalTime.parse(source, DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT));
          		}
      		};
      	}
      	
      	/**
      	 *	LocalDateTime转换器
         */
    	@Bean
      	public Converter<String, LocalDateTime> localDateTimeConverter() {
        
      		return new Converter<String, LocalDateTime>() {
        
          		@Override
       			public LocalDateTime convert(String source) {
        
              		return LocalDateTime.parse(source, DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT));
          		}
      		};
      
    	}
    	
    	/**
      	 * Json序列化和反序列化转换器
         */
    	@Bean
        public ObjectMapper objectMapper() {
        
    		ObjectMapper objectMapper = new ObjectMapper();
            //java8日期 Local系列序列化和反序列化模块
            JavaTimeModule javaTimeModule = new JavaTimeModule();
            javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)));
            javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)));
            javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));
            javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)));
            javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)));
            javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));
            
            objectMapper.registerModule(new ParameterNamesModule()).registerModule(new Jdk8Module()).registerModule(javaTimeModule);
            
            objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
            objectMapper.disable(DeserializationFeature.ADJUST_DATES_TO_CONTEXT_TIME_ZONE);
            // 忽略json字符串中不识别的属性
            objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
            // 忽略无法转换的对象
            objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
            // PrettyPrinter 格式化输出
            objectMapper.configure(SerializationFeature.INDENT_OUTPUT, true);
            // NULL不参与序列化
            objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
            // 指定时区
    		objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
            /**
             * Date日期类型字符串全局处理, 默认格式为：yyyy-MM-dd HH:mm:ss
             * 局部处理某个Date属性字段接收或返回日期格式yyyy-MM-dd, 可采用@JsonFormat(pattern = "yyyy-MM-dd", timezone="GMT+8")注解标注该属性
      		 */
            objectMapper.setDateFormat(new SimpleDateFormat(DEFAULT_DATE_TIME_FORMAT));
    		return objectMapper;
    	}
    }