add DateFmt.java

tianyayoucao126 · Aug 2, 2019 · 3c40ece · 3c40ece
1 parent 9b46f8f
commit 3c40ece
Showing 1 changed file with 56 additions and 0 deletions.
diff --git a/src/utils/src/main/java/org/tio/utils/date/DateFmt.java b/src/utils/src/main/java/org/tio/utils/date/DateFmt.java
@@ -0,0 +1,56 @@
+package org.tio.utils.date;
+
+import java.time.format.DateTimeFormatter;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 弄个全局的日期格式化类，这里的对象是线程安全的
+ * @author tanyaowu
+ */
+public class DateFmt {
+	public static final DateTimeFormatter	yyyyMMddHHmmssSSS		= DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS");
+	public static final DateTimeFormatter	yyyyMMddHHmmss			= DateTimeFormatter.ofPattern("yyyyMMddHHmmss");
+	public static final DateTimeFormatter	yyyyMMddHHmm			= DateTimeFormatter.ofPattern("yyyyMMddHHmm");
+	public static final DateTimeFormatter	yyyyMMddHH				= DateTimeFormatter.ofPattern("yyyyMMddHH");
+	public static final DateTimeFormatter	yyyyMMdd				= DateTimeFormatter.ofPattern("yyyyMMdd");
+	public static final DateTimeFormatter	yyyyMM					= DateTimeFormatter.ofPattern("yyyyMM");
+	public static final DateTimeFormatter	yyyy					= DateTimeFormatter.ofPattern("yyyy");
+	public static final DateTimeFormatter	HHmmss					= DateTimeFormatter.ofPattern("HHmmss");
+	public static final DateTimeFormatter	HHmm					= DateTimeFormatter.ofPattern("HHmm");
+	public static final DateTimeFormatter	HH						= DateTimeFormatter.ofPattern("HH");
+	public static final DateTimeFormatter	yyyy_MM_dd_HHmmssSSS	= DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS");
+	public static final DateTimeFormatter	yyyy_MM_dd_HHmmss		= DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+
+	private static final Map<String, DateTimeFormatter> map = new HashMap<>();
+	static {
+		map.put("yyyyMMddHHmmssSSS", yyyyMMddHHmmssSSS);
+		map.put("yyyyMMddHHmmss", yyyyMMddHHmmss);
+		map.put("yyyyMMddHHmm", yyyyMMddHHmm);
+		map.put("yyyyMMddHH", yyyyMMddHH);
+		map.put("yyyyMMdd", yyyyMMdd);
+		map.put("yyyyMM", yyyyMM);
+		map.put("yyyy", yyyy);
+		map.put("HHmmss", HHmmss);
+		map.put("HHmm", HHmm);
+		map.put("HH", HH);
+
+		map.put("yyyy_MM_dd_HHmmssSSS", yyyy_MM_dd_HHmmssSSS);
+		map.put("yyyy_MM_dd_HHmmss", yyyy_MM_dd_HHmmss);
+	}
+
+	/**
+	 * 
+	 * @param pattern
+	 * @return
+	 */
+	public static final DateTimeFormatter of(String pattern) {
+		DateTimeFormatter ret = map.get(pattern);
+		if (ret != null) {
+			return ret;
+		}
+		ret = DateTimeFormatter.ofPattern(pattern);
+		map.put(pattern, ret);
+		return ret;
+	}
+}