LOG4J supports simultaneous splitting of logs by date and file size

Rewrite the source code, you can use the code as a tool class:

1.log4jdateandsizesplit.java

/** * Project Name:hao24-common * File Name:Log4JDateAndSizeSplit.java * Package Name:cn.hao24.util.spring * date:2016 year March 31st Morning 11:30:22 * Copyright (c), Lujie All rights Reserved. **/
Package test/** * CLASSNAME:LOG4JDATEANDSIZESPLIT:LOG4J Log supports cutting by date and size <br/> * date:2016 year March 31 morning 11:30:22 <b r/> * @author Lujie * @version * @see */import java.io.file;import java.io.ioexception;import java.io.writer;impo RT 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 generate log class rewrite, The class can separate logs by date + specified size. <br/> * date:2016 March 31 pm 12:44:14 <br/> * @author Lujie * @version */public class Log4jdateandsizesplit Exte NDS fileappender{//The code assumes that the following constants is in a increasing//sequence.static final int top_of_t rouble = -1;static final int top_of_minute = 0;static final intTop_of_hour = 1;static final int half_day = 2;static final int top_of_day = 3;static final int top_of_week = 4;static Fina  l INT top_of_month = 5;/** * The default maximum file size is 10MB.  */protected Long maxfilesize = ten * 1024x768 * 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 COMPUTECHEC Kperiod () method.static final TimeZone gmttimezone = Timezone.gettimezone ("GMT");/** * The default constructor does Nothi  Ng.  */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 to backup files. * * @since 1.1 */public Long Getmaximumfilesize () {return maxfilesize;}  /** * Being rolled to backup files.  * * <p> * JavaBeans {@link java.beans.Introspector introspector}. * * @see #setMaxFileSize (String) */public void setmaximumfilesize (Long maxfilesize) {this.maxfilesize = MaxFileSize;}  /** * Being rolled to backup files.  * * <p> * The value "10KB" would 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;} @Overridepublic 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 is not set to 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 being 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 being rolled at midnight. "); Break;case TOP_OF_WEEK:LogLog.debug ("Appender [+ name +"] to being rolled at start of WEEK. "); Break;case TOP_OF_MONTH:LogLog.debug ("Appender [" + name + "] to being rolled at start of every MONTH."); Break;default:loglog.warn ("Unknown Periodicity for Appender [" + Name + "].");}} This method is computes the roll over period by looping through the//periods, starting with the shortest, and stopping when  The R0 is//different from from R1, where R0 are the epoch formatted according//the Datepattern (supplied by the user) and R1 is the//epoch+nextmillis (i) formatted according to Datepattern. All date//formatting are done with GMT and not local format because the test//logic are based on comparisons relative to 197 0-01-01 00:00:00//GMT (The epoch). int Computecheckperiod () {Rollingcalendar Rollingcalendar = new Rollingcalendar ( Gmttimezone, locale.english);//Set Sate to 1970-01-01 00: 00:00 gmtdate epoch = new Date (0), if (datepattern! = null) {for (int i = top_of_minute; I <= top_of_month; i++) {simpled Ateformat SimpleDateFormat = new SimpleDateFormat (Datepattern); Simpledateformat.settimezone (GmtTimeZone); Do all date//formatting in gmtstring r0 = Simpledateformat.format (epoch); Rollingcalendar.settype (i);D ate next = new Da Te (Rollingcalendar.getnextcheckmillis (epoch)); String r1 = Simpledateformat.format (next);//System.out.println ("Type =" +i+ ", R0 =" +r0+ ", r1 =" +r1 "); if (r0! = null &amp ;& 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 and then files {* * * <p> * if <code&gt ; Maxbackupindex</code> is equal to zero and then the * <code>File</code> was truncated with no backup files  Created. */public//synchronization not necessary since Doappend is aLreasy synchedvoid 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 ha Ppy.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.1target = 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 indexfor (int i = 1; i < Integer.max_value; i++) {target = new File (Datedfilename + "." + i); if (!target.exi STS ()) {//Rename fileName to DatedFilename.ithis.closeFile (); file = new file (fileName); File.renameto (target); Loglog.debug ("Renaming file" + file + "to" + target); try{//This would also close the file. This was OK since multiple//close operations is Safe.this.setFile (FileName, False, Bufferedio, buffersize);} catch (IOException e) {loglog.error ("setfile (" + FileName + ", false) call failed.", e);} Scheduledfilename = Datedfilename;} @Overridepublic synchronized void Setfile (String fileName, Boolean append, Boolean bufferedio, int buffersize) throws Ioex Ception{super.setfile (filename, append, This.bufferedio, this.buffersize); if (append) {file F = new File (filename);(( Countingquietwriter) QW). SetCount (F.length ());}} @Overrideprotected 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 = = Nu ll) {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 would occur once the//next interval is Reached.if (scheduledfilename.equals (datedfilename)) {return;} Close current file, and rename it to Datedfilenamethis.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 + "+" + sche Duledfilename);} Else{loglog.error ("Failed to rename [" + FileName + "] to [" + Scheduledfilename + "]."); try{//This would also close the file. This is OK since multiple//close operations be Safe.super.setFile (FileName, False, This.bufferedio, this.buffersize);} catch (IOException e) {errorhandler.error ("setfile (" + FileName + ", false) call failed."); Scheduledfilename = Datedfilename;}  /** * * <p> * rollover. * */@Overrideprotected 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 year March 31 AM 1 1:41:34 * Copyright (c), [email protected] 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 year March 31 morning 11:41:34 <br/> * @aut Hor Lujie * @version * @see */class Rollingcalendar extends gregoriancalendar{private static final long Serialversio nuID = -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 <) {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 ();}}

Then configure the relevant information in the configuration file:

Log4j.appender.r=test. log4jdateandsizesplitlog4j.appender.r.threshold=infolog4j.appender.r.immediateflush=truelog4j.appender.r.file= /xxx.loglog4j.appender.r.datepattern= ' _ ' yyyy-mm-dd '. Log ' log4j.appender.r.append= Truelog4j.appender.r.maxfilesize=200mb#maxbackupindex=-1 (not limit about file number) log4j.appender.r.maxbackupindex=-1log4j.appender.r.layout= org.apache.log4j.patternlayoutlog4j.appender.r.layout.conversionpattern=%d{yyyy-mm-dd HH\:mm \:ss} [%5p]-%c-%F (%L )-%m%n  

　　

LOG4J supports simultaneous splitting of logs by date and file size