Index: forgon-tools/src/test/java/com/forgon/tools/util/SimpleDateFormatThreadUnsafeTest.java
===================================================================
diff -u -r41191 -r41337
--- forgon-tools/src/test/java/com/forgon/tools/util/SimpleDateFormatThreadUnsafeTest.java	(.../SimpleDateFormatThreadUnsafeTest.java)	(revision 41191)
+++ forgon-tools/src/test/java/com/forgon/tools/util/SimpleDateFormatThreadUnsafeTest.java	(.../SimpleDateFormatThreadUnsafeTest.java)	(revision 41337)
@@ -3,13 +3,16 @@
 import org.junit.Test;
 
 import java.text.SimpleDateFormat;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
 import java.util.Date;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 
 public class SimpleDateFormatThreadUnsafeTest {
     private static final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+    private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
 
     @Test
     public void testThreadSafety() throws InterruptedException {
@@ -20,8 +23,13 @@
             executor.submit(() -> {
                 try {
                     // 多线程同时使用同一个 SimpleDateFormat 实例
-                    Date date = sdf.parse("2024-01-" + (index + 1));
-                    System.out.println(Thread.currentThread().getName() + ": " + date);
+                    if (index < 9) {
+                        Date date = sdf.parse("2024-01-0" + (index + 1));
+                        System.out.println(Thread.currentThread().getName() + ": " + ForgonDateUtils.safelyFormatDate(date, "yyyy-MM-dd", "1970-01-01"));
+                    }else{
+                        Date date = sdf.parse("2024-01-" + (index + 1));
+                        System.out.println(Thread.currentThread().getName() + ": " + ForgonDateUtils.safelyFormatDate(date, "yyyy-MM-dd", "1970-01-01"));
+                    }
                 } catch (Exception e) {
                     System.err.println(Thread.currentThread().getName() + " 出错: " + e.getMessage());
                 }
@@ -31,4 +39,30 @@
         executor.shutdown();
         executor.awaitTermination(1, TimeUnit.MINUTES);
     }
+
+    @Test
+    public void testDateFormatterSafety() throws InterruptedException {
+        ExecutorService executor = Executors.newFixedThreadPool(10);
+
+        for (int i = 0; i < 10; i++) {
+            final int index = i;
+            executor.submit(() -> {
+                try {
+                    // 多线程同时使用同一个 SimpleDateFormat 实例
+                    if (index < 9){
+                        LocalDate date = dateTimeFormatter.parse("2024-01-0" + (index + 1), LocalDate::from);
+                        System.out.println(Thread.currentThread().getName() + ": " + date);
+                    }else {
+                        LocalDate date = dateTimeFormatter.parse("2024-01-" + (index + 1), LocalDate::from);
+                        System.out.println(Thread.currentThread().getName() + ": " + date);
+                    }
+                } catch (Exception e) {
+                    System.err.println(Thread.currentThread().getName() + " 出错: " + e.getMessage());
+                }
+            });
+        }
+
+        executor.shutdown();
+        executor.awaitTermination(1, TimeUnit.MINUTES);
+    }
 }