From 58af116149e4d89a12828cf22f10fee77a63295d Mon Sep 17 00:00:00 2001
From: Binary Wang <binarywang@users.noreply.github.com>
Date: Sat, 26 Sep 2026 15:14:55 +0800
Subject: [PATCH] =?UTF-8?q?:art:=20=E4=BF=AE=E5=A4=8D=E6=97=A5=E6=9C=9F?=
 =?UTF-8?q?=E6=97=B6=E9=97=B4=E6=88=B3=E8=A7=A3=E6=9E=90=E6=BA=A2=E5=87=BA?=
 =?UTF-8?q?=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../common/util/json/WxDateTypeAdapter.java   |  7 ++-
 .../util/json/WxDateTypeAdapterTest.java      | 47 +++++++++++++++++++
 .../src/test/resources/testng.xml             |  1 +
 3 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 weixin-java-common/src/test/java/me/chanjar/weixin/common/util/json/WxDateTypeAdapterTest.java

diff --git a/weixin-java-common/src/main/java/me/chanjar/weixin/common/util/json/WxDateTypeAdapter.java b/weixin-java-common/src/main/java/me/chanjar/weixin/common/util/json/WxDateTypeAdapter.java
index fd54cf3f4..0dbad926c 100644
--- a/weixin-java-common/src/main/java/me/chanjar/weixin/common/util/json/WxDateTypeAdapter.java
+++ b/weixin-java-common/src/main/java/me/chanjar/weixin/common/util/json/WxDateTypeAdapter.java
@@ -35,7 +35,12 @@ public class WxDateTypeAdapter extends TypeAdapter<Date> {
         in.nextNull();
         return null;
       case NUMBER:
-        return new Date(in.nextInt() * 1000);
+        long seconds = in.nextLong();
+        try {
+          return new Date(Math.multiplyExact(seconds, 1000L));
+        } catch (ArithmeticException e) {
+          throw new JsonParseException("Timestamp seconds out of range: " + seconds, e);
+        }
       default:
         throw new JsonParseException("Expected NUMBER but was " + peek);
     }
diff --git a/weixin-java-common/src/test/java/me/chanjar/weixin/common/util/json/WxDateTypeAdapterTest.java b/weixin-java-common/src/test/java/me/chanjar/weixin/common/util/json/WxDateTypeAdapterTest.java
new file mode 100644
index 000000000..66395b6b5
--- /dev/null
+++ b/weixin-java-common/src/test/java/me/chanjar/weixin/common/util/json/WxDateTypeAdapterTest.java
@@ -0,0 +1,47 @@
+package me.chanjar.weixin.common.util.json;
+
+import com.google.gson.JsonParseException;
+import org.testng.annotations.Test;
+
+import java.io.IOException;
+import java.util.Date;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+/**
+ * Tests for {@link WxDateTypeAdapter}.
+ */
+public class WxDateTypeAdapterTest {
+  private final WxDateTypeAdapter adapter = new WxDateTypeAdapter();
+
+  @Test
+  public void testReadTimestampAfter2038() throws IOException {
+    Date date = this.adapter.fromJson("4102444800");
+
+    assertThat(date).isEqualTo(new Date(4102444800000L));
+  }
+
+  @Test
+  public void testReadRejectsPositiveMillisecondOverflow() {
+    long overflowingSeconds = Long.MAX_VALUE / 1000 + 1;
+
+    assertThatThrownBy(() -> this.adapter.fromJson(Long.toString(overflowingSeconds)))
+        .isInstanceOf(JsonParseException.class)
+        .hasMessageContaining("out of range");
+  }
+
+  @Test
+  public void testReadRejectsNegativeMillisecondOverflow() {
+    long overflowingSeconds = Long.MIN_VALUE / 1000 - 1;
+
+    assertThatThrownBy(() -> this.adapter.fromJson(Long.toString(overflowingSeconds)))
+        .isInstanceOf(JsonParseException.class)
+        .hasMessageContaining("out of range");
+  }
+
+  @Test
+  public void testWriteUsesSeconds() throws IOException {
+    assertThat(this.adapter.toJson(new Date(4102444800123L))).isEqualTo("4102444800");
+  }
+}
diff --git a/weixin-java-common/src/test/resources/testng.xml b/weixin-java-common/src/test/resources/testng.xml
index a9064b8c7..52edd59f5 100644
--- a/weixin-java-common/src/test/resources/testng.xml
+++ b/weixin-java-common/src/test/resources/testng.xml
@@ -8,6 +8,7 @@
       <class name="me.chanjar.weixin.common.error.WxErrorTest"/>
       <class name="me.chanjar.weixin.common.bean.WxMenuTest"/>
       <class name="me.chanjar.weixin.common.util.crypto.WxCryptUtilTest"/>
+      <class name="me.chanjar.weixin.common.util.json.WxDateTypeAdapterTest"/>
       <class name="me.chanjar.weixin.common.api.WxMessageInMemoryDuplicateCheckerTest"/>
       <class name="me.chanjar.weixin.common.session.SessionTest"/>
     </classes>