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SpringBoot笔记--Jackson
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SpringUtil.getBean<GenericConversionService>().addConverter(Date2LocalDateTimeConverter())
var handerAdapter = SpringUtil.context.getBean(RequestMappingHandlerAdapter::class.java);
var listResolvers = mutableListOf<HandlerMethodArgumentResolver>()
listResolvers.add(RequestParameterConverter(listOf(ApiParam::class.java)));
listResolvers.addAll(handerAdapter.argumentResolvers)
handerAdapter.argumentResolvers = listResolvers;
internal class MyJsonMapper
@JvmOverloads private constructor()
: ObjectMapper() {
init {
// 设置输出时包含属性的风格
this.findAndRegisterModules();
this.setSerializationInclusion(JsonInclude.Include.NON_EMPTY)
// 允许单引号、允许不带引号的字段名称
this.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true)
this.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true)
// 设置输入时忽略在JSON字符串中存在但Java对象实际没有的属性
this.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)
// 空值处理为空串
this.serializerProvider.setNullValueSerializer(object : JsonSerializer<Any>() {
@Throws(IOException::class, JsonProcessingException::class)
override fun serialize(value: Any, jgen: JsonGenerator,
provider: SerializerProvider) {
jgen.writeString("")
}
})
this.registerModule(CustomModule());
// 进行HTML解码。
// this.registerModule(SimpleModule().addSerializer(String::class.java, object : JsonSerializer<String>() {
// @Throws(IOException::class, JsonProcessingException::class)
// override fun serialize(value: String, jgen: JsonGenerator,
// provider: SerializerProvider) {
// jgen.writeString(StringEscapeUtils.unescapeHtml4(value))
// }
// }))
// 设置时区
this.setTimeZone(TimeZone.getDefault())//getTimeZone("GMT+8:00")
}
companion object {
/**
* 创建只输出非Null且非Empty(如List.isEmpty)的属性到Json字符串的Mapper,建议在外部接口中使用.
*/
val instance: MyJsonMapper = MyJsonMapper();
}
}
// 先定义一个json生成器
class ObjectIdJsonSerializer : JsonSerializer<ObjectId>() {
override fun serialize(o: ObjectId?, j: JsonGenerator, s: SerializerProvider) {
if (o == null) {
j.writeNull()
} else {
j.writeString(o.toString())
}
}
}
class LocalDateJsonSerializer : JsonSerializer<LocalDate>() {
override fun serialize(value: LocalDate?, generator: JsonGenerator, serializers: SerializerProvider) {
if (value == null) {
generator.writeNull()
} else {
generator.writeNumber(Date.from(value.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant()).time)
}
}
}
class LocalTimeJsonSerializer : JsonSerializer<LocalTime>() {
override fun serialize(value: LocalTime?, generator: JsonGenerator, serializers: SerializerProvider) {
if (value == null) {
generator.writeNull()
} else {
generator.writeString(value.AsString())
}
}
}
class LocalDateTimeJsonSerializer : JsonSerializer<LocalDateTime>() {
override fun serialize(value: LocalDateTime?, generator: JsonGenerator, serializers: SerializerProvider) {
if (value == null) {
generator.writeNull()
} else {
generator.writeNumber(Date.from(value.atZone(ZoneId.systemDefault()).toInstant()).time)
}
}
}
class LocalDateJsonDeserializer : JsonDeserializer<LocalDate>() {
override fun deserialize(json: JsonParser?, ctxt: DeserializationContext?): LocalDate? {
if (json == null) {
return null;
}
if (json.valueAsString.contains("-")) {
return json.valueAsString.AsLocalDateTime().toLocalDate();
}
return Date(json.longValue).AsLocalDateTime().toLocalDate();
}
}
class LocalTimeJsonDeserializer : JsonDeserializer<LocalTime>() {
override fun deserialize(json: JsonParser?, ctxt: DeserializationContext?): LocalTime? {
if (json == null) {
return null;
}
if (json.valueAsString.contains(".")) {
return LocalTime.parse(json.valueAsString, DateTimeFormatter.ofPattern("HH:mm:ss.sss"))
}
return LocalTime.parse(json.valueAsString, DateTimeFormatter.ofPattern("HH:mm:ss"))
}
}
class LocalDateTimeJsonDeserializer : JsonDeserializer<LocalDateTime>() {
override fun deserialize(json: JsonParser?, ctxt: DeserializationContext?): LocalDateTime? {
if (json == null) {
return null;
}
if (json.valueAsString.contains("-")) {
return json.valueAsString.AsLocalDateTime();
}
return Date(json.longValue).AsLocalDateTime();
}
}
//Jackson 输出的时候，进行自定义序列化格式。
// http://www.jianshu.com/p/a0fb6559f56d
@Component
class CustomModule() : SimpleModule(PackageVersion.VERSION) {
init {
addSerializer(ObjectId::class.java, ObjectIdJsonSerializer());
addSerializer(LocalDate::class.java, LocalDateJsonSerializer());
addSerializer(LocalTime::class.java, LocalTimeJsonSerializer());
addSerializer(LocalDateTime::class.java, LocalDateTimeJsonSerializer());
addDeserializer(LocalDate::class.java, LocalDateJsonDeserializer())
addDeserializer(LocalTime::class.java, LocalTimeJsonDeserializer())
addDeserializer(LocalDateTime::class.java, LocalDateTimeJsonDeserializer())
}
}
fun <T> T.ToJson(): String {
if (this is String) return this;
return MyJsonMapper.instance.writeValueAsString(this) ?: ""
}
fun <T> String.FromJson(collectionClass: Class<T>): T {
if (collectionClass == String::class.java) {
return this as T
}
var jsonString = this.RemoveComment().Remove("\r\n", "\n")
if (jsonString.isEmpty()) {
return collectionClass.newInstance();
}
return MyJsonMapper.instance.readValue(jsonString, collectionClass)!!
}
inline fun <reified T> String.FromJson(): T {
return this.FromJson(T::class.java)
}
class RequestParameterConverter(var canIgnoreAnnotationClazzes: List<Class<*>> = listOf()) : HandlerMethodArgumentResolver {
override fun supportsParameter(parameter: MethodParameter?): Boolean {
if (parameter == null) return false
if (ServletRequest::class.java.isAssignableFrom(parameter.parameterType)) return false
if (ServletResponse::class.java.isAssignableFrom(parameter.parameterType)) return false
if (HttpSession::class.java.isAssignableFrom(parameter.parameterType)) return false
if (parameter.hasParameterAnnotation(PathVariable::class.java)) return false;
if (parameter.hasParameterAnnotation(CookieValue::class.java)) return false;
if (parameter.hasParameterAnnotation(RequestHeader::class.java)) return false;
if (parameter.hasParameterAnnotation(RequestParam::class.java)) return false;
var parameterAnnotations = parameter.parameterAnnotations.toMutableList();
parameterAnnotations.removeAll { Nullable::class.java.isInstance(it) }
parameterAnnotations.removeAll { NotNull::class.java.isInstance(it) }
canIgnoreAnnotationClazzes.forEach { ignoreClazz ->
parameterAnnotations.removeAll { ignoreClazz.isInstance(it) }
}
if (parameterAnnotations.size > 0) return false;
return true
//return parameter?.hasParameterAnnotation(JsonValue::class.java) ?: false;
}
override fun resolveArgument(parameter: MethodParameter?, mavContainer: ModelAndViewContainer?, webRequest: NativeWebRequest?, binderFactory: WebDataBinderFactory?): Any? {
if (parameter == null || mavContainer == null || webRequest == null || binderFactory == null) return null
var key = parameter.parameterName
var request = (webRequest as ServletWebRequest).request as MyHttpRequestWrapper;
var value: Any? = null
if (request.json.containsKey(key)) {
value = request.json.get(key)
} else if (request.requestMap.contains(key)) {
value = request.requestMap.get(request.queryString);
}
if (value == null || (value is String && value.isEmpty())) {
if (parameter.parameterType == String::class.java) {
return "";
} else if (Number::class.java.isAssignableFrom(parameter.parameterType)) {
return MyUtil.getSimpleClassDefaultValue(parameter.parameterType);
} else if (parameter.parameterType.isArray) {
return "[]".FromJson(parameter.parameterType)
} else if (Iterable::class.java.isAssignableFrom(parameter.parameterType)) {
return "[]".FromJson(parameter.parameterType);
}
return null;
// var nullable = parameter.parameterAnnotations.any { Nullable::class.java.isInstance(it) }
//
// if (nullable) {
// return null;
// }
// return MyUtil.getSimpleClassDefaultValue(parameter.parameterType)
}
if (parameter.parameterType.isEnum) {
return value.AsString().ToEnum(parameter.parameterType)
} else if (value.javaClass.isInstance(parameter.parameterType)) {
return value;
} else if (parameter.parameterType == Boolean::class.java) {
return value.AsBoolean()
} else if (parameter.parameterType == Character::class.java) {
return value.toString()[0]
} else if (parameter.parameterType == Byte::class.java) {
return value.AsInt().toByte()
} else if (parameter.parameterType == Short::class.java) {
return value.AsInt().toShort()
} else if (parameter.parameterType == Int::class.java ||
parameter.parameterType == java.lang.Integer::class.java) {
return value.AsInt()
} else if (parameter.parameterType == Long::class.java) {
return value.AsLong()
} else if (parameter.parameterType == Float::class.java) {
return value.AsDouble()
} else if (parameter.parameterType == Double::class.java) {
return value.AsDouble().toLong()
} else if (parameter.parameterType == String::class.java) {
return value.AsString()
} else if (parameter.parameterType == LocalDate::class.java) {
return value.AsLocalDateTime().toLocalDate()
} else if (parameter.parameterType == LocalTime::class.java) {
return value.AsLocalDateTime().toLocalTime()
} else if (parameter.parameterType == LocalDateTime::class.java) {
return value.AsLocalDateTime()
} else if (parameter.parameterType == Date::class.java) {
return Date.from(value.AsLocalDateTime().atZone(ZoneId.systemDefault()).toInstant());
} else {
return value.AsString().FromJson(parameter.parameterType);
}
return value
}
}
@Configuration
open class MongoConfig {
@Bean
@Throws(Exception::class)
open fun mongoTemplate(): MongoTemplate {
var dbFactory = SpringUtil.getBean<MongoDbFactory>();
//remove _class
val converter = MappingMongoConverter(DefaultDbRefResolver(dbFactory), MongoMappingContext())
converter.typeMapper = DefaultMongoTypeMapper(null)
(converter.conversionService as GenericConversionService).addConverter(Date2LocalDateTimeConverter())
return MongoTemplate(dbFactory, converter)
}
}
class Date2LocalDateTimeConverter : GenericConverter {
override fun getConvertibleTypes(): MutableSet<GenericConverter.ConvertiblePair> {
var pairs = hashSetOf<GenericConverter.ConvertiblePair>();
pairs.add(GenericConverter.ConvertiblePair(String::class.java, LocalDate::class.java));
pairs.add(GenericConverter.ConvertiblePair(String::class.java, LocalTime::class.java));
pairs.add(GenericConverter.ConvertiblePair(String::class.java, LocalDateTime::class.java));
pairs.add(GenericConverter.ConvertiblePair(Date::class.java, LocalDate::class.java));
pairs.add(GenericConverter.ConvertiblePair(Date::class.java, LocalTime::class.java));
pairs.add(GenericConverter.ConvertiblePair(Date::class.java, LocalDateTime::class.java));
pairs.add(GenericConverter.ConvertiblePair(LocalDate::class.java, Date::class.java));
pairs.add(GenericConverter.ConvertiblePair(LocalTime::class.java, Date::class.java));
pairs.add(GenericConverter.ConvertiblePair(LocalDateTime::class.java, Date::class.java));
return pairs;
}
override fun convert(value: Any?, sourceType: TypeDescriptor?, targetType: TypeDescriptor?): Any? {
if (value == null || sourceType == null || targetType == null) return null
var valueClass = sourceType.type;
var targetClass = targetType.type;
if (valueClass == String::class.java) {
var strValue = value.AsString();
if (strValue.isEmpty()) {
return null;
}
if (targetClass == LocalDate::class.java) {
return strValue.AsLocalDateTime().toLocalDate();
}
if (targetClass == LocalTime::class.java) {
return strValue.AsLocalDateTime().toLocalTime()
}
if (targetClass == LocalDateTime::class.java) {
return strValue.AsLocalDateTime();
}
}
if (valueClass == Date::class.java) {
if (targetClass == LocalDate::class.java) {
return value.AsLocalDateTime().toLocalDate();
}
if (targetClass == LocalTime::class.java) {
return value.AsLocalDateTime().toLocalTime();
}
if (targetClass == LocalDateTime::class.java) {
return value.AsLocalDateTime()
}
}
if (targetClass == Date::class.java) {
if (valueClass == LocalDate::class.java) {
return Date.from((value as LocalDate).atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());
}
if (valueClass == LocalTime::class.java) {
return Date.from((value as LocalTime).atDate("1970-01-01".AsLocalDateTime().toLocalDate()).atZone(ZoneId.systemDefault()).toInstant());
}
if (valueClass == LocalDateTime::class.java) {
return Date.from((value as LocalDateTime).atZone(ZoneId.systemDefault()).toInstant());
}
}
return null;
}
}
问题
返回实体时,如:
- JsonTypedResult 类型, 当有消息时, 仅返回: JsonResult
- JsonTypedResult 类型, 当 data.id 为 "000000000" 时, 返回 id= ""
