解决多线程下SimpleDateFormat线程不安全造成的bug

Author: zlay0701

src/main/java/cn/jiguang/common/utils/TimeUtils.java

@@ -6,17 +6,27 @@
 
 public class TimeUtils {
 
-    private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
-    private static final SimpleDateFormat TIME_ONLY_FORMAT = new SimpleDateFormat("HH:mm:ss");
+	private static final ThreadLocal<SimpleDateFormat> DATE_FORMAT = new ThreadLocal<SimpleDateFormat>() {
+        @Override
+        protected SimpleDateFormat initialValue() {
+            return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        }
+    };
+    private static final ThreadLocal<SimpleDateFormat> TIME_ONLY_FORMAT = new ThreadLocal<SimpleDateFormat>() {
+        @Override
+        protected SimpleDateFormat initialValue() {
+            return new SimpleDateFormat("HH:mm:ss");
+        }
+    };
 
     static {
-        DATE_FORMAT.setLenient(false);
-        TIME_ONLY_FORMAT.setLenient(false);
+        DATE_FORMAT.get().setLenient(false);
+        TIME_ONLY_FORMAT.get().setLenient(false);
     }
 
     public static boolean isDateFormat(String time) {
         try {
-            DATE_FORMAT.parse(time);
+            DATE_FORMAT.get().parse(time);
         } catch (ParseException e) {
             return false;
         }
@@ -25,7 +35,7 @@ public static boolean isDateFormat(String time) {
 
     public static boolean isTimeFormat(String time) {
         try{
-            TIME_ONLY_FORMAT.parse(time);
+            TIME_ONLY_FORMAT.get().parse(time);
         } catch (ParseException e) {
             return false;
         }