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fix code

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Looly 2024-10-10 17:39:51 +08:00
parent 4b5d556f32
commit 3e94c0a92d
1 changed files with 32 additions and 27 deletions
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59
hutool-core/src/main/java/org/dromara/hutool/core/date/format/FastDatePrinter.java
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@ -17,11 +17,10 @@
package org.dromara.hutool.core.date.format;
import org.dromara.hutool.core.date.format.parser.FastDateParser;
import org.dromara.hutool.core.text.StrUtil;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import java.util.*;
import java.util.concurrent.ConcurrentLinkedQueue;
/**
* {@link java.text.SimpleDateFormat} 的线程安全版本，用于将 {@link Date} 格式化输出<br>
@ -33,19 +32,25 @@ public class FastDatePrinter extends SimpleDateBasic implements DatePrinter {
private static final long serialVersionUID = -6305750172255764887L;
private final DatePattern datePattern;
/**
* 缓存的Calendar对象，用于减少对象创建。参考tomcat的ConcurrentDateFormat
*/
private final Queue<Calendar> queue;
// Constructor
// -----------------------------------------------------------------------
/**
* 构造，内部使用<br>
*
* @param pattern 使用{@link java.text.SimpleDateFormat} 相同的日期格式
* @param pattern 使用{@link java.text.SimpleDateFormat} 相同的日期格式
* @param timeZone 非空时区{@link TimeZone}
* @param locale 非空{@link Locale} 日期地理位置
* @param locale 非空{@link Locale} 日期地理位置
*/
public FastDatePrinter(final String pattern, final TimeZone timeZone, final Locale locale) {
super(pattern, timeZone, locale);
this.datePattern = new DatePattern(pattern, locale, timeZone);
this.queue = new ConcurrentLinkedQueue<>();
}
// Format methods
@ -72,36 +77,28 @@ public class FastDatePrinter extends SimpleDateBasic implements DatePrinter {
}
@Override
public String format(final long millis) {
final Calendar c = Calendar.getInstance(timeZone, locale);
c.setTimeInMillis(millis);
return applyRulesToString(c);
public String format(final Date date) {
return format(date.getTime());
}
@Override
public String format(final Date date) {
final Calendar c = Calendar.getInstance(timeZone, locale);
c.setTime(date);
return applyRulesToString(c);
public String format(final long millis) {
return format(millis, StrUtil.builder(datePattern.getEstimateLength())).toString();
}
@Override
public String format(final Calendar calendar) {
return format(calendar, new StringBuilder(datePattern.getEstimateLength())).toString();
return format(calendar, StrUtil.builder(datePattern.getEstimateLength())).toString();
}
@Override
public <B extends Appendable> B format(final Date date, final B buf) {
final Calendar c = Calendar.getInstance(timeZone, locale);
c.setTime(date);
return datePattern.applyRules(c, buf);
return format(date.getTime(), buf);
}
@Override
public <B extends Appendable> B format(final long millis, final B buf) {
final Calendar c = Calendar.getInstance(timeZone, locale);
c.setTimeInMillis(millis);
return datePattern.applyRules(c, buf);
return applyRules(millis, buf);
}
@Override
@ -115,17 +112,25 @@ public class FastDatePrinter extends SimpleDateBasic implements DatePrinter {
}
/**
* Creates a String representation of the given Calendar by applying the rules of this printer to it.
* 根据规则将时间戳转换为Appendable，复用Calendar对象，避免创建新对象
*
* @param c the Calender to apply the rules to.
* @return a String representation of the given Calendar.
* @param millis 时间戳
* @param buf 待拼接的 Appendable
* @return buf 拼接后的Appendable
*/
private String applyRulesToString(final Calendar c) {
return datePattern.applyRules(c, new StringBuilder(datePattern.getEstimateLength())).toString();
private <B extends Appendable> B applyRules(final long millis, final B buf) {
Calendar calendar = queue.poll();
if (calendar == null) {
calendar = Calendar.getInstance(timeZone, locale);
}
calendar.setTimeInMillis(millis);
final B b = datePattern.applyRules(calendar, buf);
queue.offer(calendar);
return b;
}
/**
*估算生成的日期字符串长度<br>
* 估算生成的日期字符串长度<br>
* 实际生成的字符串长度小于或等于此值
*
* @return 日期字符串长度