Springboot 时间格式化

方法一：属性上加注解

时间属性上添加注解：@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")

@Data  
@Builder  
@NoArgsConstructor  
@AllArgsConstructor  
public class Employee implements Serializable {  
  

    private Long id;  

    private String username;  

    private String name;  


    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")  
    private LocalDateTime createTime;  

    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")  
    private LocalDateTime updateTime;  

  
}

方法二： 方法参数中添加注解@DateTimeFormat

/**  
* 营业额统计  
* @param begin  
* @param end  
* @return  
*/  
@GetMapping("/turnoverStatistics")  
@ApiOperation("营业额统计")  
public Result<TurnoverReportVO> turnoverStatistics(  
    @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate begin,  
    @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate end){  
    log.info("营业额数据统计：{},{}",begin,end);  
    return Result.success(reportService.getTurnoverStatistics(begin,end));  
}

方法三：拓展spring mvc的消息转换器

重写父类方法extendMessageConverters

@Configuration  
@Slf4j  
public class WebMvcConfiguration extends WebMvcConfigurationSupport {  
  
    @Autowired  
    private JwtTokenAdminInterceptor jwtTokenAdminInterceptor;  
    @Autowired  
    private JwtTokenUserInterceptor jwtTokenUserInterceptor;  

    /**  
    * 注册自定义拦截器  
    * @param registry  
    */  
    protected void addInterceptors(InterceptorRegistry registry) {  
        log.info("开始注册自定义拦截器...");  
        registry.addInterceptor(jwtTokenAdminInterceptor)  
        .addPathPatterns("/admin/**")  
        .excludePathPatterns("/admin/employee/login");  

        registry.addInterceptor(jwtTokenUserInterceptor)  
        .addPathPatterns("/user/**")  
        .excludePathPatterns("/user/user/login")  
        .excludePathPatterns("/user/shop/status");  
    }  


    /**  
    * 设置静态资源映射，主要是访问接口文档（html、js、css）  
    * @param registry  
    */  
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {  
    log.info("开始设置静态资源映射...");  
    registry.addResourceHandler("/doc.html").addResourceLocations("classpath:/META-INF/resources/");  
    registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");  
    }  

    /**  
    * 扩展Spring MVC框架的消息转化器  
    * @param converters  
    */  
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {  
        log.info("扩展消息转换器...");  
        //创建一个消息转换器对象  
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();  
        //需要为消息转换器设置一个对象转换器，对象转换器可以将Java对象序列化为json数据  
        converter.setObjectMapper(new JacksonObjectMapper());  
        //将自己的消息转化器加入容器中  
        converters.add(0,converter);  
    }  
}

创建对象转换器JacksonObjectMapper

/**  
* 对象映射器:基于jackson将Java对象转为json，或者将json转为Java对象  
* 将JSON解析为Java对象的过程称为 [从JSON反序列化Java对象]  
* 从Java对象生成JSON的过程称为 [序列化Java对象到JSON]  
*/  
public class JacksonObjectMapper extends ObjectMapper {  
  
    public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";  
    //public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";  
    public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm";  
    public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";  

    public JacksonObjectMapper() {  
    super();  
    //收到未知属性时不报异常  
    this.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);  

    //反序列化时，属性不存在的兼容处理  
    this.getDeserializationConfig().withoutFeatures(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);  

    SimpleModule simpleModule = new SimpleModule()  
    .addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))  
    .addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))  
    .addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)))  
    .addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))  
    .addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))  
    .addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));  

    //注册功能模块 例如，可以添加自定义序列化器和反序列化器  
    this.registerModule(simpleModule);  
    }  
}

目录结构