⚡ 根据P3C优化代码

blade-core-tool/src/main/java/org/springblade/core/tool/utils/ConcurrentDateFormat.java

@@ -0,0 +1,86 @@
+/**
+ * Copyright (c) 2018-2028, DreamLu 卢春梦 (qq596392912@gmail.com).
+ * <p>
+ * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.gnu.org/licenses/lgpl.html
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springblade.core.tool.utils;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.Queue;
+import java.util.TimeZone;
+import java.util.concurrent.ConcurrentLinkedQueue;
+
+/**
+ * 参考tomcat8中的并发DateFormat
+ * <p>
+ * {@link SimpleDateFormat}的线程安全包装器。
+ * 不使用ThreadLocal，创建足够的SimpleDateFormat对象来满足并发性要求。
+ * </p>
+ *
+ * @author L.cm
+ */
+public class ConcurrentDateFormat {
+	private final String format;
+	private final Locale locale;
+	private final TimeZone timezone;
+	private final Queue<SimpleDateFormat> queue = new ConcurrentLinkedQueue<>();
+
+	private ConcurrentDateFormat(String format, Locale locale, TimeZone timezone) {
+		this.format = format;
+		this.locale = locale;
+		this.timezone = timezone;
+		SimpleDateFormat initial = createInstance();
+		queue.add(initial);
+	}
+
+	public static ConcurrentDateFormat of(String format) {
+		return new ConcurrentDateFormat(format, Locale.getDefault(), TimeZone.getDefault());
+	}
+
+	public static ConcurrentDateFormat of(String format, TimeZone timezone) {
+		return new ConcurrentDateFormat(format, Locale.getDefault(), timezone);
+	}
+
+	public static ConcurrentDateFormat of(String format, Locale locale, TimeZone timezone) {
+		return new ConcurrentDateFormat(format, locale, timezone);
+	}
+
+	public String format(Date date) {
+		SimpleDateFormat sdf = queue.poll();
+		if (sdf == null) {
+			sdf = createInstance();
+		}
+		String result = sdf.format(date);
+		queue.add(sdf);
+		return result;
+	}
+
+	public Date parse(String source) throws ParseException {
+		SimpleDateFormat sdf = queue.poll();
+		if (sdf == null) {
+			sdf = createInstance();
+		}
+		Date result = sdf.parse(source);
+		queue.add(sdf);
+		return result;
+	}
+
+	private SimpleDateFormat createInstance() {
+		SimpleDateFormat sdf = new SimpleDateFormat(format, locale);
+		sdf.setTimeZone(timezone);
+		return sdf;
+	}
+}

blade-core-tool/src/main/java/org/springblade/core/tool/utils/DateUtil.java

@@ -0,0 +1,216 @@
+/**
+ * Copyright (c) 2018-2028, DreamLu 卢春梦 (qq596392912@gmail.com).
+ * <p>
+ * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.gnu.org/licenses/lgpl.html
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springblade.core.tool.utils;
+
+import org.springframework.util.Assert;
+
+import java.text.ParseException;
+import java.util.Calendar;
+import java.util.Date;
+
+/**
+ * 日期工具类
+ *
+ * @author L.cm
+ */
+public class DateUtil {
+
+	/**
+	 * 设置年
+	 *
+	 * @param date   时间
+	 * @param amount 年数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	public static Date setYears(Date date, int amount) {
+		return set(date, Calendar.YEAR, amount);
+	}
+
+	/**
+	 * 设置月
+	 *
+	 * @param date   时间
+	 * @param amount 月数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	public static Date setMonths(Date date, int amount) {
+		return set(date, Calendar.MONTH, amount);
+	}
+
+	/**
+	 * 设置周
+	 *
+	 * @param date   时间
+	 * @param amount 周数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	public static Date setWeeks(Date date, int amount) {
+		return set(date, Calendar.WEEK_OF_YEAR, amount);
+	}
+
+	/**
+	 * 设置天
+	 *
+	 * @param date   时间
+	 * @param amount 天数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	public static Date setDays(Date date, int amount) {
+		return set(date, Calendar.DATE, amount);
+	}
+
+	/**
+	 * 设置小时
+	 *
+	 * @param date   时间
+	 * @param amount 小时数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	public static Date setHours(Date date, int amount) {
+		return set(date, Calendar.HOUR_OF_DAY, amount);
+	}
+
+	/**
+	 * 设置分钟
+	 *
+	 * @param date   时间
+	 * @param amount 分钟数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	public static Date setMinutes(Date date, int amount) {
+		return set(date, Calendar.MINUTE, amount);
+	}
+
+	/**
+	 * 设置秒
+	 *
+	 * @param date   时间
+	 * @param amount 秒数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	public static Date setSeconds(Date date, int amount) {
+		return set(date, Calendar.SECOND, amount);
+	}
+
+	/**
+	 * 设置毫秒
+	 *
+	 * @param date   时间
+	 * @param amount 毫秒数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	public static Date setMilliseconds(Date date, int amount) {
+		return set(date, Calendar.MILLISECOND, amount);
+	}
+
+	/**
+	 * 设置日期属性
+	 *
+	 * @param date          时间
+	 * @param calendarField 更改的属性
+	 * @param amount        更改数，-1表示减少
+	 * @return 设置后的时间
+	 */
+	private static Date set(Date date, int calendarField, int amount) {
+		Assert.notNull(date, "The date must not be null");
+		Calendar c = Calendar.getInstance();
+		c.setLenient(false);
+		c.setTime(date);
+		c.add(calendarField, amount);
+		return c.getTime();
+	}
+
+	public static final String PATTERN_DATETIME = "yyyy-MM-dd HH:mm:ss";
+	public static final String PATTERN_DATE = "yyyy-MM-dd";
+	public static final String PATTERN_TIME = "HH:mm:ss";
+
+	public static final ConcurrentDateFormat DATETIME_FORMAT = ConcurrentDateFormat.of(PATTERN_DATETIME);
+	public static final ConcurrentDateFormat DATE_FORMAT = ConcurrentDateFormat.of(PATTERN_DATE);
+	public static final ConcurrentDateFormat TIME_FORMAT = ConcurrentDateFormat.of(PATTERN_TIME);
+
+	/**
+	 * 日期时间格式化
+	 *
+	 * @param date 时间
+	 * @return 格式化后的时间
+	 */
+	public static String formatDateTime(Date date) {
+		return DATETIME_FORMAT.format(date);
+	}
+
+	/**
+	 * 日期格式化
+	 *
+	 * @param date 时间
+	 * @return 格式化后的时间
+	 */
+	public static String formatDate(Date date) {
+		return DATE_FORMAT.format(date);
+	}
+
+	/**
+	 * 时间格式化
+	 *
+	 * @param date 时间
+	 * @return 格式化后的时间
+	 */
+	public static String formatTime(Date date) {
+		return TIME_FORMAT.format(date);
+	}
+
+	/**
+	 * 日期格式化
+	 *
+	 * @param date    时间
+	 * @param pattern 表达式
+	 * @return 格式化后的时间
+	 */
+	public static String format(Date date, String pattern) {
+		return ConcurrentDateFormat.of(pattern).format(date);
+	}
+
+	/**
+	 * 将字符串转换为时间
+	 *
+	 * @param dateStr 时间字符串
+	 * @param pattern 表达式
+	 * @return 时间
+	 */
+	public static Date parse(String dateStr, String pattern) {
+		ConcurrentDateFormat format = ConcurrentDateFormat.of(pattern);
+		try {
+			return format.parse(dateStr);
+		} catch (ParseException e) {
+			throw Exceptions.unchecked(e);
+		}
+	}
+
+	/**
+	 * 将字符串转换为时间
+	 *
+	 * @param dateStr 时间字符串
+	 * @param format  ConcurrentDateFormat
+	 * @return 时间
+	 */
+	public static Date parse(String dateStr, ConcurrentDateFormat format) {
+		try {
+			return format.parse(dateStr);
+		} catch (ParseException e) {
+			throw Exceptions.unchecked(e);
+		}
+	}
+
+}