fix bug

hutool-core/src/main/java/cn/hutool/core/convert/impl/TemporalAccessorConverter.java

@@ -3,6 +3,7 @@ package cn.hutool.core.convert.impl;
 import cn.hutool.core.convert.AbstractConverter;
 import cn.hutool.core.date.DateTime;
 import cn.hutool.core.date.DateUtil;
+import cn.hutool.core.date.format.GlobalCustomFormat;
 import cn.hutool.core.text.StrUtil;
 import cn.hutool.core.util.ObjUtil;
 
@@ -156,7 +157,15 @@ public class TemporalAccessorConverter extends AbstractConverter {
 			return IsoEra.of(Math.toIntExact(time));
 		}
 
-		return parseFromInstant(targetClass, Instant.ofEpochMilli(time), null);
+		final Instant instant;
+		if(GlobalCustomFormat.FORMAT_SECONDS.equals(this.format)){
+			// https://gitee.com/dromara/hutool/issues/I6IS5B
+			// Unix时间戳
+			instant = Instant.ofEpochSecond(time);
+		}else{
+			instant = Instant.ofEpochMilli(time);
+		}
+		return parseFromInstant(targetClass, instant, null);
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/date/format/GlobalCustomFormat.java

@@ -18,7 +18,13 @@ import java.util.function.Function;
  */
 public class GlobalCustomFormat {
 
+	/**
+	 * 格式：秒时间戳（Unix时间戳）
+	 */
 	public static final String FORMAT_SECONDS = "#sss";
+	/**
+	 * 格式：毫秒时间戳
+	 */
 	public static final String FORMAT_MILLISECONDS = "#SSS";
 
 	private static final Map<CharSequence, Function<Date, String>> formatterMap;

hutool-json/src/main/java/cn/hutool/json/convert/JSONConverter.java

@@ -6,14 +6,24 @@ import cn.hutool.core.convert.Convert;
 import cn.hutool.core.convert.ConvertException;
 import cn.hutool.core.convert.Converter;
 import cn.hutool.core.convert.RegisterConverter;
-import cn.hutool.core.convert.impl.*;
+import cn.hutool.core.convert.impl.ArrayConverter;
+import cn.hutool.core.convert.impl.CollectionConverter;
+import cn.hutool.core.convert.impl.DateConverter;
+import cn.hutool.core.convert.impl.MapConverter;
+import cn.hutool.core.convert.impl.TemporalAccessorConverter;
 import cn.hutool.core.map.MapWrapper;
 import cn.hutool.core.reflect.ConstructorUtil;
 import cn.hutool.core.reflect.TypeReference;
 import cn.hutool.core.reflect.TypeUtil;
 import cn.hutool.core.text.StrUtil;
 import cn.hutool.core.util.ArrayUtil;
-import cn.hutool.json.*;
+import cn.hutool.json.InternalJSONUtil;
+import cn.hutool.json.JSON;
+import cn.hutool.json.JSONArray;
+import cn.hutool.json.JSONConfig;
+import cn.hutool.json.JSONException;
+import cn.hutool.json.JSONObject;
+import cn.hutool.json.JSONUtil;
 import cn.hutool.json.serialize.JSONDeserializer;
 import cn.hutool.json.serialize.JSONString;
 

hutool-json/src/main/java/cn/hutool/json/jwt/Claims.java

@@ -1,6 +1,7 @@
 package cn.hutool.json.jwt;
 
 import cn.hutool.core.codec.BaseN.Base64;
+import cn.hutool.core.date.format.GlobalCustomFormat;
 import cn.hutool.core.lang.Assert;
 import cn.hutool.core.map.MapUtil;
 import cn.hutool.json.JSONConfig;
@@ -21,7 +22,7 @@ public class Claims implements Serializable {
 	private static final long serialVersionUID = 1L;
 
 	// 时间使用秒级时间戳表示
-	private final JSONConfig CONFIG = JSONConfig.of().setDateFormat("#sss");
+	private final JSONConfig CONFIG = JSONConfig.of().setDateFormat(GlobalCustomFormat.FORMAT_SECONDS);
 
 	private JSONObject claimJSON;
 

hutool-json/src/test/java/cn/hutool/json/jwt/IssueI6IS5BTest.java

@@ -0,0 +1,55 @@
+package cn.hutool.json.jwt;
+
+import cn.hutool.core.date.DateUtil;
+import cn.hutool.core.date.TimeUtil;
+import cn.hutool.json.JSONObject;
+import cn.hutool.json.JSONUtil;
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.nio.charset.StandardCharsets;
+import java.time.LocalDateTime;
+import java.util.Date;
+
+/**
+ * https://gitee.com/dromara/hutool/issues/I6IS5B
+ */
+public class IssueI6IS5BTest {
+
+	@Test
+	public void payloadToBeanTest() {
+		final LocalDateTime iat = TimeUtil.of(DateUtil.parse("2023-03-03"));
+		final JwtToken jwtToken = new JwtToken();
+		jwtToken.setIat(iat);
+		final String token = JWTUtil.createToken(JSONUtil.parseObj(jwtToken), "123".getBytes(StandardCharsets.UTF_8));
+		Assert.assertEquals("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpYXQiOjE2Nzc3NzI4MDB9.SXU_mm1wT5lNoK-Dq5Y8f3BItv_44zuAlyeWLqajpXg", token);
+		final JSONObject payloads = JWTUtil.parseToken(token).getPayloads();
+		Assert.assertEquals("{\"iat\":1677772800}", payloads.toString());
+		final JwtToken o = payloads.toBean(JwtToken.class);
+		Assert.assertEquals(iat, o.getIat());
+	}
+
+	@Data
+	static class JwtToken {
+		private LocalDateTime iat;
+	}
+
+	@Test
+	public void payloadToBeanTest2() {
+		final Date iat = DateUtil.parse("2023-03-03");
+		final JwtToken2 jwtToken = new JwtToken2();
+		jwtToken.setIat(iat);
+		final String token = JWTUtil.createToken(JSONUtil.parseObj(jwtToken), "123".getBytes(StandardCharsets.UTF_8));
+		Assert.assertEquals("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpYXQiOjE2Nzc3NzI4MDB9.SXU_mm1wT5lNoK-Dq5Y8f3BItv_44zuAlyeWLqajpXg", token);
+		final JSONObject payloads = JWTUtil.parseToken(token).getPayloads();
+		Assert.assertEquals("{\"iat\":1677772800}", payloads.toString());
+		final JwtToken2 o = payloads.toBean(JwtToken2.class);
+		Assert.assertEquals(iat, o.getIat());
+	}
+
+	@Data
+	static class JwtToken2 {
+		private Date iat;
+	}
+}