fix bug

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;
+	}
+}