log4j 支持同时按日期和文件大小分割日志
重写源代码,可以将代码作为工具类使用:
1.Log4JDateAndSizeSplit.java
/** * Project Name:hao24-common * File Name:Log4JDateAndSizeSplit.java * Package Name:cn.hao24.util.spring * Date:2016年3月31日上午11:30:22 * Copyright (c) 2016, lujie All Rights Reserved. * */
package test /** * ClassName:Log4JDateAndSizeSplit :log4j日志支持按照日期和大小进行切割<br/> * Date: 2016年3月31日 上午11:30:22 <br/> * @author lujie * @version * @see */ import java.io.File; import java.io.IOException; import java.io.Writer; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.util.TimeZone; import org.apache.log4j.FileAppender; import org.apache.log4j.Layout; import org.apache.log4j.helpers.CountingQuietWriter; import org.apache.log4j.helpers.LogLog; import org.apache.log4j.helpers.OptionConverter; import org.apache.log4j.spi.LoggingEvent; /** * * ClassName: Log4JDateAndSizeSplit <br/> * Function: Log4j生成日志类重写,该类可以按照日期+指定大小分隔日志. <br/> * date: 2016年3月31日 下午12:44:14 <br/> * @author lujie * @version */ public class Log4JDateAndSizeSplit extends FileAppender { // The code assumes that the following constants are in a increasing // sequence. static final int TOP_OF_TROUBLE = -1; static final int TOP_OF_MINUTE = 0; static final int TOP_OF_HOUR = 1; static final int HALF_DAY = 2; static final int TOP_OF_DAY = 3; static final int TOP_OF_WEEK = 4; static final int TOP_OF_MONTH = 5; /** * The default maximum file size is 10MB. */ protected long maxFileSize = 10 * 1024 * 1024; /** * There is one backup file by default. */ protected int maxBackupIndex = 1; /** * meaning daily rollover. */ private String datePattern = "'.'yyyy-MM-dd"; /** * "scheduledFilename" at the beginning of the next hour. * */ private String scheduledFilename; /** * The next time we estimate a rollover should occur. */ private long nextCheck = System.currentTimeMillis() - 1; Date now = new Date(); SimpleDateFormat sdf; RollingCalendar rc = new RollingCalendar(); int checkPeriod = TOP_OF_TROUBLE; // The gmtTimeZone is used only in computeCheckPeriod() method. static final TimeZone gmtTimeZone = TimeZone.getTimeZone("GMT"); /** * The default constructor does nothing. */ public Log4JDateAndSizeSplit() { } /** * ouput destination for this appender. */ public Log4JDateAndSizeSplit(Layout layout, String filename, String datePattern) throws IOException { super(layout, filename, true); this.datePattern = datePattern; activateOptions(); } /** * being rolled over to backup files. * * @since 1.1 */ public long getMaximumFileSize() { return maxFileSize; } /** * being rolled over to backup files. * * <p> * JavaBeans {@link java.beans.Introspector Introspector}. * * @see #setMaxFileSize(String) */ public void setMaximumFileSize(long maxFileSize) { this.maxFileSize = maxFileSize; } /** * being rolled over to backup files. * * <p> * the value "10KB" will be interpreted as 10240. */ public void setMaxFileSize(String value) { maxFileSize = OptionConverter.toFileSize(value, maxFileSize + 1); } /** * Returns the value of the <b>MaxBackupIndex</b> option. */ public int getMaxBackupIndex() { return maxBackupIndex; } /** * Set the maximum number of backup files to keep around. * * <p> */ public void setMaxBackupIndex(int maxBackups) { this.maxBackupIndex = maxBackups; } /** */ public void setDatePattern(String pattern) { datePattern = pattern; } /** Returns the value of the <b>DatePattern</b> option. */ public String getDatePattern() { return datePattern; } @Override public void activateOptions() { super.activateOptions(); if (datePattern != null && fileName != null) { now.setTime(System.currentTimeMillis()); sdf = new SimpleDateFormat(datePattern); int type = computeCheckPeriod(); printPeriodicity(type); rc.setType(type); File file = new File(fileName); scheduledFilename = fileName + sdf.format(new Date(file.lastModified())); } else { LogLog.error("Either File or DatePattern options are not set for appender [" + name + "]."); } } void printPeriodicity(int type) { switch (type) { case TOP_OF_MINUTE: LogLog.debug("Appender [" + name + "] to be rolled every minute."); break; case TOP_OF_HOUR: LogLog.debug("Appender [" + name + "] to be rolled on top of every hour."); break; case HALF_DAY: LogLog.debug("Appender [" + name + "] to be rolled at midday and midnight."); break; case TOP_OF_DAY: LogLog.debug("Appender [" + name + "] to be rolled at midnight."); break; case TOP_OF_WEEK: LogLog.debug("Appender [" + name + "] to be rolled at start of week."); break; case TOP_OF_MONTH: LogLog.debug("Appender [" + name + "] to be rolled at start of every month."); break; default: LogLog.warn("Unknown periodicity for appender [" + name + "]."); } } // This method computes the roll over period by looping over the // periods, starting with the shortest, and stopping when the r0 is // different from from r1, where r0 is the epoch formatted according // the datePattern (supplied by the user) and r1 is the // epoch+nextMillis(i) formatted according to datePattern. All date // formatting is done in GMT and not local format because the test // logic is based on comparisons relative to 1970-01-01 00:00:00 // GMT (the epoch). int computeCheckPeriod() { RollingCalendar rollingCalendar = new RollingCalendar(gmtTimeZone, Locale.ENGLISH); // set sate to 1970-01-01 00:00:00 GMT Date epoch = new Date(0); if (datePattern != null) { for (int i = TOP_OF_MINUTE; i <= TOP_OF_MONTH; i++) { SimpleDateFormat simpleDateFormat = new SimpleDateFormat(datePattern); simpleDateFormat.setTimeZone(gmtTimeZone); // do all date // formatting in GMT String r0 = simpleDateFormat.format(epoch); rollingCalendar.setType(i); Date next = new Date(rollingCalendar.getNextCheckMillis(epoch)); String r1 = simpleDateFormat.format(next); // System.out.println("Type = "+i+", r0 = "+r0+", r1 = "+r1); if (r0 != null && r1 != null && !r0.equals(r1)) { return i; } } } return TOP_OF_TROUBLE; // Deliberately head for trouble... } /** * Implements the usual roll over behaviour. * * <p> * If <code>MaxBackupIndex</code> is positive, then files { * * <p> * If <code>MaxBackupIndex</code> is equal to zero, then the * <code>File</code> is truncated with no backup files created. */ public // synchronization not necessary since doAppend is alreasy synched void sizeRollOver() { File target; File file; LogLog.debug("rolling over count=" + ((CountingQuietWriter) qw).getCount()); LogLog.debug("maxBackupIndex=" + maxBackupIndex); String datedFilename = fileName + sdf.format(now); if (maxBackupIndex > 0) { // Delete the oldest file, to keep Windows happy. file = new File(datedFilename + '.' + maxBackupIndex); if (file.exists()) file.delete(); // Map {(maxBackupIndex - 1), ..., 2, 1} to {maxBackupIndex, ..., 3, // 2} for (int i = maxBackupIndex - 1; i >= 1; i--) { file = new File(datedFilename + "." + i); if (file.exists()) { target = new File(datedFilename + '.' + (i + 1)); LogLog.debug("Renaming file " + file + " to " + target); file.renameTo(target); } } // Rename fileName to datedFilename.1 target = new File(datedFilename + "." + 1); this.closeFile(); // keep windows happy. file = new File(fileName); LogLog.debug("Renaming file " + file + " to " + target); file.renameTo(target); } else if (maxBackupIndex < 0) { // infinite number of files // find the max backup index for (int i = 1; i < Integer.MAX_VALUE; i++) { target = new File(datedFilename + "." + i); if (!target.exists()) { // Rename fileName to datedFilename.i this.closeFile(); file = new File(fileName); file.renameTo(target); LogLog.debug("Renaming file " + file + " to " + target); break; } } } try { // This will also close the file. This is OK since multiple // close operations are safe. this.setFile(fileName, false, bufferedIO, bufferSize); } catch (IOException e) { LogLog.error("setFile(" + fileName + ", false) call failed.", e); } scheduledFilename = datedFilename; } @Override public synchronized void setFile(String fileName, boolean append, boolean bufferedIO, int bufferSize) throws IOException { super.setFile(fileName, append, this.bufferedIO, this.bufferSize); if (append) { File f = new File(fileName); ((CountingQuietWriter) qw).setCount(f.length()); } } @Override protected void setQWForFiles(Writer writer) { this.qw = new CountingQuietWriter(writer, errorHandler); } /** * Rollover the current file to a new file. */ void timeRollOver() throws IOException { /* Compute filename, but only if datePattern is specified */ if (datePattern == null) { errorHandler.error("Missing DatePattern option in rollOver()."); return; } String datedFilename = fileName + sdf.format(now); // It is too early to roll over because we are still within the // bounds of the current interval. Rollover will occur once the // next interval is reached. if (scheduledFilename.equals(datedFilename)) { return; } // close current file, and rename it to datedFilename this.closeFile(); File target = new File(scheduledFilename); if (target.exists()) { target.delete(); } File file = new File(fileName); boolean result = file.renameTo(target); if (result) { LogLog.debug(fileName + " -> " + scheduledFilename); } else { LogLog.error("Failed to rename [" + fileName + "] to [" + scheduledFilename + "]."); } try { // This will also close the file. This is OK since multiple // close operations are safe. super.setFile(fileName, false, this.bufferedIO, this.bufferSize); } catch (IOException e) { errorHandler.error("setFile(" + fileName + ", false) call failed."); } scheduledFilename = datedFilename; } /** * * <p> * rollover. * */ @Override protected void subAppend(LoggingEvent event) { long n = System.currentTimeMillis(); if (n >= nextCheck) { now.setTime(n); nextCheck = rc.getNextCheckMillis(now); try { timeRollOver(); } catch (IOException ioe) { LogLog.error("rollOver() failed.", ioe); } } else if ((fileName != null) && ((CountingQuietWriter) qw).getCount() >= maxFileSize) { sizeRollOver(); } super.subAppend(event); } }
2.
RollingCalendar
/** * Project Name:hao24-common * File Name:RollingCalendar.java * Package Name:cn.hao24.util.spring * Date:2016年3月31日上午11:41:34 * Copyright (c) 2016, lujie@hao24.cn All Rights Reserved. * */ import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.Locale; import java.util.TimeZone; /** * ClassName:RollingCalendar <br/> * Date: 2016年3月31日 上午11:41:34 <br/> * @author lujie * @version * @see */ class RollingCalendar extends GregorianCalendar { private static final long serialVersionUID = -3560331770601814177L; int type = MyDailyRollingFileAppender.TOP_OF_TROUBLE; RollingCalendar() { super(); } RollingCalendar(TimeZone tz, Locale locale) { super(tz, locale); } void setType(int type) { this.type = type; } public long getNextCheckMillis(Date now) { return getNextCheckDate(now).getTime(); } public Date getNextCheckDate(Date now) { this.setTime(now); switch (type) { case MyDailyRollingFileAppender.TOP_OF_MINUTE: this.set(Calendar.SECOND, 0); this.set(Calendar.MILLISECOND, 0); this.add(Calendar.MINUTE, 1); break; case MyDailyRollingFileAppender.TOP_OF_HOUR: this.set(Calendar.MINUTE, 0); this.set(Calendar.SECOND, 0); this.set(Calendar.MILLISECOND, 0); this.add(Calendar.HOUR_OF_DAY, 1); break; case MyDailyRollingFileAppender.HALF_DAY: this.set(Calendar.MINUTE, 0); this.set(Calendar.SECOND, 0); this.set(Calendar.MILLISECOND, 0); int hour = get(Calendar.HOUR_OF_DAY); if (hour < 12) { this.set(Calendar.HOUR_OF_DAY, 12); } else { this.set(Calendar.HOUR_OF_DAY, 0); this.add(Calendar.DAY_OF_MONTH, 1); } break; case MyDailyRollingFileAppender.TOP_OF_DAY: this.set(Calendar.HOUR_OF_DAY, 0); this.set(Calendar.MINUTE, 0); this.set(Calendar.SECOND, 0); this.set(Calendar.MILLISECOND, 0); this.add(Calendar.DATE, 1); break; case MyDailyRollingFileAppender.TOP_OF_WEEK: this.set(Calendar.DAY_OF_WEEK, getFirstDayOfWeek()); this.set(Calendar.HOUR_OF_DAY, 0); this.set(Calendar.MINUTE, 0); this.set(Calendar.SECOND, 0); this.set(Calendar.MILLISECOND, 0); this.add(Calendar.WEEK_OF_YEAR, 1); break; case MyDailyRollingFileAppender.TOP_OF_MONTH: this.set(Calendar.DATE, 1); this.set(Calendar.HOUR_OF_DAY, 0); this.set(Calendar.MINUTE, 0); this.set(Calendar.SECOND, 0); this.set(Calendar.MILLISECOND, 0); this.add(Calendar.MONTH, 1); break; default: throw new IllegalStateException("Unknown periodicity type."); } return getTime(); } }
之后在配置文件中配置相关信息:
log4j.appender.R=test.Log4JDateAndSizeSplit log4j.appender.R.Threshold=INFO log4j.appender.R.ImmediateFlush=true log4j.appender.R.File=/xxx.log log4j.appender.R.DatePattern='_'yyyy-MM-dd'.log' log4j.appender.R.Append=true log4j.appender.R.MaxFileSize=200MB #MaxBackupIndex=-1(not limit about file number) log4j.appender.R.MaxBackupIndex=-1 log4j.appender.R.layout=org.apache.log4j.PatternLayout log4j.appender.R.layout.ConversionPattern= %d{yyyy -MM-dd HH\:mm \:ss} [%5p] - %c -%F(%L) -%m%n