FastJson配置グローバルLocal DateTimeプロローグ
31707 ワード
最近仕事でJDK 1.8 timeバッグを使って、だんだん前のDate類に取って代わって、以前に比べて、timeカバンのAPIは確かに使いやすくなりました.
しかし、ちょっと卵が痛いところはLocalDateTimeがISO 8601規格をサポートしているところです.即ち、「2018-10 T 05:51:31.94 Z」です.MVCでは、習慣的に[yyy-M-dd HH:mm:ss]を使います.幸いSpringに注釈が付いています.例えば:
注釈の使用を減らすために、FastJsonにデフォルトでロカDateTime類を導入してもいいですか?まず恒例のFastJsonfigを祭ります.
しかし、ちょっと卵が痛いところはLocalDateTimeがISO 8601規格をサポートしているところです.即ち、「2018-10 T 05:51:31.94 Z」です.MVCでは、習慣的に[yyy-M-dd HH:mm:ss]を使います.幸いSpringに注釈が付いています.例えば:
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss)
private LocalDateTime ldt;
@RequestParam(required = false) @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate date
@Configuration
public class LocalDateTimeFormatConfig {
@Bean
public Formatter<LocalDate> localDateFormatter() {
return new Formatter<LocalDate>() {
@Override
public @Nullable String print(@Nullable LocalDate object, @Nullable Locale locale) {
if (Objects.isNull(object)){
return null;
}
return object.format(DateTimeFormatter.ofPattern("yyyy-MM-dd"));
}
@Override
public @Nullable LocalDate parse(@Nullable String text, @Nullable Locale locale) {
if (!StringUtils.hasText(text)) {
return null;
}
return LocalDate.parse(text, DateTimeFormatter.ofPattern("yyyy-MM-dd"));
}
};
}
@Bean
public Formatter<LocalDateTime> localDateTimeFormatter() {
return new Formatter<LocalDateTime>() {
@Override
public @Nullable String print(@Nullable LocalDateTime object, @Nullable Locale locale) {
if (Objects.isNull(object)){
return null;
}
return object.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
}
@Override
public @Nullable LocalDateTime parse(@Nullable String text, @Nullable Locale locale) {
if (!StringUtils.hasText(text)) {
return null;
}
return LocalDateTime.parse(text, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
}
};
}
@Bean
public Formatter<LocalTime> localTimeFormatter() {
return new Formatter<LocalTime>() {
@Override
public @Nullable String print(@Nullable LocalTime object, @Nullable Locale locale) {
if (Objects.isNull(object)){
return null;
}
return object.format(DateTimeFormatter.ofPattern("HH:mm:ss"));
}
@Override
public @Nullable LocalTime parse(@Nullable String text, @Nullable Locale locale) {
if (!StringUtils.hasText(text)) {
return null;
}
return LocalTime.parse(text, DateTimeFormatter.ofPattern("HH:mm:ss"));
}
};
}
}
public class LocalDateTimeConvertConfig {
private String dateTimePattern = "yyyy-MM-dd HH:mm:ss";
private String datePattern = "yyyy-MM-dd";
@Bean
public Converter<String, LocalDateTime> LocalDateTimeConvert() {
return source -> {
DateTimeFormatter df = DateTimeFormatter.ofPattern(dateTimePattern);
LocalDateTime date = null;
try {
date = LocalDateTime.parse(source, df);
} catch (Exception e) {
e.printStackTrace();
}
return date;
};
}
@Bean
public Converter<String, LocalDate> localDateConverter() {
return source -> {
DateTimeFormatter df = DateTimeFormatter.ofPattern(datePattern);
LocalDate date = null;
try {
date = LocalDate.parse(source,df);
}catch (Exception e){
e.printStackTrace();
}
return date;
};
}
// JackSon LocalDateTime, FastJso,
@Bean
public LocalDateTimeSerializer localDateTimeDeserializer() {
return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(dateTimePattern));
}
@Bean
public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
return builder -> builder.serializerByType(LocalDateTime.class, localDateTimeDeserializer());
}
}
注釈の使用を減らすために、FastJsonにデフォルトでロカDateTime類を導入してもいいですか?まず恒例のFastJsonfigを祭ります.
FastJsonConfig fastJsonConfig = new FastJsonConfig();
fastJsonConfig.setSerializerFeatures(
SerializerFeature.PrettyFormat,
SerializerFeature.WriteMapNullValue,
...
SerializerFeature.WriteNullStringAsEmpty);
fastJsonConfig.setCharset(Charset.forName("utf-8"));
...
ValueFilter valueFilter = (o, s, o1) -> {
if (null == o1) {
o1 = "";
}
if (o1 instanceof LocalDateTime){
o1 = ((LocalDateTime) o1).format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
}
return o1;
};
fastJsonConfig.setSerializeFilters(valueFilter);
// ， ， o1 ， LocalDateTime o1 String o1， LocalDateTime ， LocalDateTime
fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
...
// ， ， @JSONField format ， Date ，LocalDateTime ，LocalDate 。（ ）
public class LocalDateTimeSerializer implements ObjectSerializer {
public static final LocalDateTimeSerializer instance = new LocalDateTimeSerializer();
private static final String defaultPattern = "yyyy-MM-dd HH:mm:ss";
public LocalDateTimeSerializer() {
}
@Override
public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
SerializeWriter out = serializer.out;
if (object == null) {
out.writeNull();
} else {
LocalDateTime result = (LocalDateTime) object;
out.writeString(result.format(DateTimeFormatter.ofPattern(defaultPattern)));
}
}
}
SerializeConfig serializeConfig = SerializeConfig.globalInstance;
serializeConfig.put(LocalDateTime.class, LocalDateTimeSerializer.instance);
fastJsonConfig.setSerializeConfig(serializeConfig);
// ，@JSONField ， LocalDateTime
...