package com.vincent.rsf.openApi.entity.params;
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import com.fasterxml.jackson.core.JsonParser;
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import com.fasterxml.jackson.core.JsonToken;
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import com.fasterxml.jackson.databind.DeserializationContext;
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import com.fasterxml.jackson.databind.JsonDeserializer;
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import java.io.IOException;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.TimeZone;
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/**
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* 支持时间戳（秒/毫秒）与字符串 "yyyy-MM-dd HH:mm:ss" 的 Date 反序列化，与 @JsonFormat 配合使用。
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*/
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public class FlexibleDateDeserializer extends JsonDeserializer<Date> {
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private static final long MS_THRESHOLD = 10_000_000_000L; // 大于此为毫秒
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private static final String PATTERN = "yyyy-MM-dd HH:mm:ss";
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private static final TimeZone DEFAULT_TZ = TimeZone.getTimeZone("GMT+8");
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@Override
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public Date deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
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JsonToken t = p.getCurrentToken();
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if (t == JsonToken.VALUE_NUMBER_INT || t == JsonToken.VALUE_NUMBER_FLOAT) {
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long v = p.getLongValue();
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long ms = v >= MS_THRESHOLD ? v : v * 1000;
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return new Date(ms);
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}
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if (t == JsonToken.VALUE_STRING) {
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String s = p.getText().trim();
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if (s.isEmpty()) return null;
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try {
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long v = Long.parseLong(s);
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long ms = v >= MS_THRESHOLD ? v : v * 1000;
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return new Date(ms);
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} catch (NumberFormatException ignored) {
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}
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try {
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SimpleDateFormat sdf = new SimpleDateFormat(PATTERN);
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sdf.setTimeZone(DEFAULT_TZ);
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sdf.setLenient(false);
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return sdf.parse(s);
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} catch (Exception ignored) {
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}
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if (s.length() >= 10 && s.charAt(4) == '-' && s.charAt(7) == '-') {
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try {
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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sdf.setTimeZone(DEFAULT_TZ);
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sdf.setLenient(false);
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return sdf.parse(s.substring(0, 10));
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} catch (Exception ignored) {
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}
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}
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return null;
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}
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if (t == JsonToken.VALUE_NULL) return null;
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return (Date) ctxt.handleUnexpectedToken(Date.class, p);
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}
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}
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