优化设备在线状态

src/main/java/com/genersoft/iot/vmp/utils/DateUtil.java

@@ -0,0 +1,57 @@
+package com.genersoft.iot.vmp.utils;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+/**    
+ * 全局时间工具类
+ * @author swwheihei
+ */
+public class DateUtil {
+
+	private static final String yyyy_MM_dd_T_HH_mm_ss_SSSXXX = "yyyy-MM-dd'T'HH:mm:ss";
+    private static final String yyyy_MM_dd_HH_mm_ss = "yyyy-MM-dd HH:mm:ss";
+
+    public static final SimpleDateFormat formatISO8601 = new SimpleDateFormat(yyyy_MM_dd_T_HH_mm_ss_SSSXXX, Locale.getDefault());
+    public static final SimpleDateFormat format = new SimpleDateFormat(yyyy_MM_dd_HH_mm_ss, Locale.getDefault());
+
+	public static String yyyy_MM_dd_HH_mm_ssToISO8601(String formatTime) {
+
+        try {
+            return formatISO8601.format(format.parse(formatTime));
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        return "";
+    }
+	
+	public static String ISO8601Toyyyy_MM_dd_HH_mm_ss(String formatTime) {
+
+        try {
+            return format.format(formatISO8601.parse(formatTime));
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        return "";
+    }
+	
+	public static long yyyy_MM_dd_HH_mm_ssToTimestamp(String formatTime) {
+		//设置要读取的时间字符串格式
+		Date date;
+		try {
+			date = format.parse(formatTime);
+			Long timestamp=date.getTime()/1000;
+			//转换为Date类
+			return timestamp;
+		} catch (ParseException e) {
+			e.printStackTrace();
+		}
+		return 0;
+	}
+
+    public static String getNow() {
+        return format.format(System.currentTimeMillis());
+    }
+}