Merge pull request #3474 from fanzhongwei/master

fix issue #3473

src/main/java/com/alibaba/fastjson/serializer/DateCodec.java

@@ -51,7 +51,7 @@ public void write(JSONSerializer serializer, Object object, Object fieldName, Ty
         }
 
         Class<?> clazz = object.getClass();
-        if (clazz == java.sql.Date.class) {
+        if (clazz == java.sql.Date.class && !out.isEnabled(SerializerFeature.WriteDateUseDateFormat)) {
             long millis = ((java.sql.Date) object).getTime();
             TimeZone timeZone = serializer.timeZone;
             int offset = timeZone.getOffset(millis);

src/test/java/com/alibaba/fastjson/serializer/issue3473/SerializeWriterJavaSqlDateTest.java

@@ -0,0 +1,45 @@
+package com.alibaba.fastjson.serializer.issue3473;
+
+import java.sql.Date;
+import java.text.ParseException;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.commons.lang3.time.DateUtils;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.serializer.SerializerFeature;
+
+/**
+ * package com.alibaba.fastjson.serializer.issue3473 <br/>
+ * description: java.sql.Date序列化测试 <br/>
+ * Copyright 2019 thunisoft, Inc. All rights reserved.
+ *
+ * @author fanzhongwei
+ * @date 20-9-29
+ */
+public class SerializeWriterJavaSqlDateTest {
+
+    private Map<String, Object> data = new HashMap<String, Object>(1, 1);
+
+    @Before
+    public void before() throws ParseException {
+        data.put("sqlDate", new Date(DateUtils.parseDate("2020-09-29", "yyyy-MM-dd")
+            .getTime()));
+    }
+
+    @Test
+    public void yyyy_MM_dd_HH_mm_ss_test() {
+        String json = JSON.toJSONString(data, SerializerFeature.WriteDateUseDateFormat);
+        Assert.assertEquals("{\"sqlDate\":\"2020-09-29 00:00:00\"}", json);
+    }
+
+    @Test
+    public void yyyy_MM_dd_test() {
+        String json = JSON.toJSONString(data);
+        Assert.assertEquals("{\"sqlDate\":\"2020-09-29\"}", json);
+    }
+}