spring boot 在SpringMVC中使用Jackson并格式化时间

 

全局配置  全局配置  全局配置  Jackson时间格式化

mvc  Jackson 返回时间时，默认会返回时间戳或者是 2018-08-30T12:12:12CST格式的时间字符串

spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8
   

配置了以上参数 只能对Date 类型的时间格式化  对于 LocalDateTime ,Instant 并没有什么效果
只需要添加以下配置就可以解决

@Configuration
public class Java8TimeConfig {

    @Value("${spring.jackson.date-format}")
    private String formatValue;

    @Bean(name = "format")
    DateTimeFormatter format() {
        return DateTimeFormatter.ofPattern(formatValue);
    }

    @Bean
    public ObjectMapper serializingObjectMapper(@Qualifier("format") DateTimeFormatter format) {
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(format));
        javaTimeModule.addSerializer(Instant.class, new InstantCustomSerializer(format));
        javaTimeModule.addSerializer(Date.class, new DateSerializer(false, new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")));
        ObjectMapper mapper = new ObjectMapper()
                .registerModule(new ParameterNamesModule())
                .disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
                .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
                .registerModule(javaTimeModule);
        return mapper;
    }

    class InstantCustomSerializer extends JsonSerializer<Instant> {
        private DateTimeFormatter format;

        private InstantCustomSerializer(DateTimeFormatter formatter) {
            this.format = formatter;
        }

        @Override
        public void serialize(Instant instant, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
            if (instant == null) {
                return;
            }
            String jsonValue = format.format(instant.atZone(ZoneId.systemDefault()));
            jsonGenerator.writeString(jsonValue);
        }
    }

}



需要引入相关jar包 下面是pom文件

<!--jackson 时间格式化-->
<dependency>
    <groupId>com.fasterxml.jackson.module</groupId>
    <artifactId>jackson-module-parameter-names</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jdk8</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>