log4j日志写文件

log4j日志写文件

log4j.properties 配置

log4j.rootLogger=info,stdout,D,E

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
### DEBUG =/data/logs/pangbar/server/log.log 
log4j.appender.D=org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File=/data/logs/f_user/server/log4j/log.log
log4j.appender.D.Append=true
log4j.appender.D.Threshold=DEBUG 
log4j.appender.D.layout=org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
###/data/logs/pangbar/server/error.log ###
log4j.appender.E=org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File=/data/logs/f_user/server/log4j/error.log 
log4j.appender.E.Append=true
log4j.appender.E.Threshold=ERROR 
log4j.appender.E.layout=org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

log4j.logger.visit=INFO,file1
log4j.additivity.visit = false
log4j.appender.file1=com.fzm.user.log.MinuteRollingFileAppender
#vpnlog/visit/visitInfo.log    D:\\data\\visit\\visitInfo.log
log4j.appender.file1.File=vpnlog/visit/visitInfo.log
#yyyy-MM-dd-HH-mm 每分钟 yyyy-MM-dd 每天
log4j.appender.file1.DatePattern=yyyy-MM-dd-HH-mm
log4j.appender.file1.layout=org.apache.log4j.PatternLayout

log4j.logger.download=INFO,file2
log4j.additivity.download = false
log4j.appender.file2=com.fzm.user.log.MinuteRollingFileAppender
#vpnlog/download/downloadInfo.log     D:\\data\\download\\downloadInfo.log
log4j.appender.file2.File=vpnlog/download/downloadInfo.log
#yyyy-MM-dd-HH-mm 每分钟 yyyy-MM-dd 每天
log4j.appender.file2.DatePattern=yyyy-MM-dd-HH-mm
log4j.appender.file2.layout=org.apache.log4j.PatternLayout


#log4j.appender.database=org.apache.log4j.jdbc.JDBCAppender
#log4j.appender.database.layout=org.apache.log4j.PatternLayout
#log4j.appender.database.driver=com.mysql.jdbc.Driver
#设置要将日志插入到数据库的驱动
#log4j.appender.database.Threshold=info
#定义什么级别的错误将写入到数据库中
#log4j.appender.database.BufferSize=1
#设置缓存大小，就是当有1条日志信息是才忘数据库插一次
#log4j.appender.database.URL=jdbc:mysql://***.***.*.**:3306/f_vpn_user?useUnicode=true&characterEncoding=UTF-8
#log4j.appender.database.user=***
#log4j.appender.database.password=****
#log4j.appender.database.sql=insert into t_visit_record(user_id,ip_addr,status) values('%X{user_id}','%X{ip_addr}','%X{status}')

log4j使用的类

package com.test.user.log;
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * 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.
 */

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.Locale;

import org.apache.log4j.FileAppender;
import org.apache.log4j.Layout;
import org.apache.log4j.helpers.LogLog;
import org.apache.log4j.spi.LoggingEvent;

/**
 * DailyRollingFileAppender extends {@link FileAppender} so that the underlying
 * file is rolled over at a user chosen frequency.
 * 
 * <p>
 * The rolling schedule is specified by the <b>DatePattern</b> option. This
 * pattern should follow the {@link SimpleDateFormat} conventions. In
 * particular, you <em>must</em> escape literal text within a pair of single
 * quotes. A formatted version of the date pattern is used as the suffix for the
 * rolled file name.
 * 
 * <p>
 * For example, if the <b>File</b> option is set to <code>/foo/bar.log</code>
 * and the <b>DatePattern</b> set to <code>'.'yyyy-MM-dd</code>, on
 * 2001-02-16 at midnight, the logging file <code>/foo/bar.log</code> will be
 * copied to <code>/foo/bar.log.2001-02-16</code> and logging for 2001-02-17
 * will continue in <code>/foo/bar.log</code> until it rolls over the next
 * day.
 * 
 * <p>
 * Is is possible to specify monthly, weekly, half-daily, daily, hourly, or
 * minutely rollover schedules.
 * 
 * <p>
 * <table border="1" cellpadding="2">
 * <tr>
 * <th>DatePattern</th>
 * <th>Rollover schedule</th>
 * <th>Example</th>
 * 
 * <tr>
 * <td><code>'.'yyyy-MM</code>
 * <td>Rollover at the beginning of each month</td>
 * 
 * <td>At midnight of May 31st, 2002 <code>/foo/bar.log</code> will be copied
 * to <code>/foo/bar.log.2002-05</code>. Logging for the month of June will
 * be output to <code>/foo/bar.log</code> until it is also rolled over the
 * next month.
 * 
 * <tr>
 * <td><code>'.'yyyy-ww</code>
 * 
 * <td>Rollover at the first day of each week. The first day of the week
 * depends on the locale.</td>
 * 
 * <td>Assuming the first day of the week is Sunday, on Saturday midnight, June
 * 9th 2002, the file <i>/foo/bar.log</i> will be copied to
 * <i>/foo/bar.log.2002-23</i>. Logging for the 24th week of 2002 will be
 * output to <code>/foo/bar.log</code> until it is rolled over the next week.
 * 
 * <tr>
 * <td><code>'.'yyyy-MM-dd</code>
 * 
 * <td>Rollover at midnight each day.</td>
 * 
 * <td>At midnight, on March 8th, 2002, <code>/foo/bar.log</code> will be
 * copied to <code>/foo/bar.log.2002-03-08</code>. Logging for the 9th day of
 * March will be output to <code>/foo/bar.log</code> until it is rolled over
 * the next day.
 * 
 * <tr>
 * <td><code>'.'yyyy-MM-dd-a</code>
 * 
 * <td>Rollover at midnight and midday of each day.</td>
 * 
 * <td>At noon, on March 9th, 2002, <code>/foo/bar.log</code> will be copied
 * to <code>/foo/bar.log.2002-03-09-AM</code>. Logging for the afternoon of
 * the 9th will be output to <code>/foo/bar.log</code> until it is rolled over
 * at midnight.
 * 
 * <tr>
 * <td><code>'.'yyyy-MM-dd-HH</code>
 * 
 * <td>Rollover at the top of every hour.</td>
 * 
 * <td>At approximately 11:00.000 o'clock on March 9th, 2002,
 * <code>/foo/bar.log</code> will be copied to
 * <code>/foo/bar.log.2002-03-09-10</code>. Logging for the 11th hour of the
 * 9th of March will be output to <code>/foo/bar.log</code> until it is rolled
 * over at the beginning of the next hour.
 * 
 * 
 * <tr>
 * <td><code>'.'yyyy-MM-dd-HH-mm</code>
 * 
 * <td>Rollover at the beginning of every minute.</td>
 * 
 * <td>At approximately 11:23,000, on March 9th, 2001,
 * <code>/foo/bar.log</code> will be copied to
 * <code>/foo/bar.log.2001-03-09-10-22</code>. Logging for the minute of
 * 11:23 (9th of March) will be output to <code>/foo/bar.log</code> until it
 * is rolled over the next minute.
 * 
 * </table>
 * 
 * <p>
 * Do not use the colon ":" character in anywhere in the <b>DatePattern</b>
 * option. The text before the colon is interpeted as the protocol specificaion
 * of a URL which is probably not what you want.
 * 
 * 
 * @author Eirik Lygre
 * @author Ceki G&uuml;lc&uuml;
 */
public class MinuteRollingFileAppender 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 date pattern. By default, the pattern is set to "'.'yyyy-MM-dd"
	 * meaning daily rollover.
	 */
	private String datePattern = "'.'yyyy-MM-dd";

	/**
	 * The log file will be renamed to the value of the scheduledFilename
	 * variable when the next interval is entered. For example, if the rollover
	 * period is one hour, the log file will be renamed to the value of
	 * "scheduledFilename" at the beginning of the next hour.
	 * 
	 * The precise time when a rollover occurs depends on logging activity.
	 */
	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 MinuteRollingFileAppender() {
	}

	/**
	 * Instantiate a <code>DailyRollingFileAppender</code> and open the file
	 * designated by <code>filename</code>. The opened filename will become
	 * the ouput destination for this appender.
	 * 
	 */
	public MinuteRollingFileAppender(Layout layout, String filename,
			String datePattern) throws IOException {
		super(layout, filename, true);
		this.datePattern = datePattern;
		activateOptions();
	}

	/**
	 * The <b>DatePattern</b> takes a string in the same format as expected by
	 * {@link SimpleDateFormat}. This options determines the rollover schedule.
	 */
	public void setDatePattern(String pattern) {
		datePattern = pattern;
	}

	/** Returns the value of the <b>DatePattern</b> option. */
	public String getDatePattern() {
		return datePattern;
	}

	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...
	}

	/**
	 * Rollover the current file to a new file.
	 */
	void rollOver() 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 = copy(file, 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.
			this.setFile(fileName, false, this.bufferedIO, this.bufferSize);
		} catch (IOException e) {
			errorHandler.error("setFile(" + fileName + ", false) call failed.");
		}
		scheduledFilename = datedFilename;
	}

	/**
	 * Copies src file to dst file. If the dst file does not exist, it is
	 * created.8KB cache
	 * 
	 * @param src
	 * @param dst
	 * @throws IOException
	 */
	boolean copy(File src, File dst) throws IOException {
		try {
			InputStream in = new FileInputStream(src);

			OutputStream out = new FileOutputStream(dst);

			// Transfer bytes from in to out
			byte[] buf = new byte[8192];
			int len;
			while ((len = in.read(buf)) > 0) {
				out.write(buf, 0, len);
			}
			in.close();
			out.close();
			return true;
		} catch (FileNotFoundException e) {
			LogLog.error("源文件不存在,或者目标文件无法被识别." + e);
			return false;
		} catch (IOException e) {
			LogLog.error("文件读写错误." + e);
			return false;
		}
	}

	/**
	 * This method differentiates DailyRollingFileAppender from its super class.
	 * 
	 * <p>
	 * Before actually logging, this method will check whether it is time to do
	 * a rollover. If it is, it will schedule the next rollover time and then
	 * rollover.
	 */
	protected void subAppend(LoggingEvent event) {
		long n = System.currentTimeMillis();
		if (n >= nextCheck) {
			now.setTime(n);
			nextCheck = rc.getNextCheckMillis(now);
			try {
				rollOver();
			} catch (IOException ioe) {
				LogLog.error("rollOver() failed.", ioe);
			}
		}
		super.subAppend(event);
	}
}

/**
 * RollingCalendar is a helper class to DailyRollingFileAppender. Given a
 * periodicity type and the current time, it computes the start of the next
 * interval.
 */
class RollingCalendar extends GregorianCalendar {
	private static final long serialVersionUID = -3560331770601814177L;

	int type = MinuteRollingFileAppender.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 MinuteRollingFileAppender.TOP_OF_MINUTE:
			this.set(Calendar.SECOND, 0);
			this.set(Calendar.MILLISECOND, 0);
			this.add(Calendar.MINUTE, 5);
			break;
		case MinuteRollingFileAppender.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 MinuteRollingFileAppender.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 MinuteRollingFileAppender.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 MinuteRollingFileAppender.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 MinuteRollingFileAppender.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();
	}
}

###使用

 private static org.apache.log4j.Logger visitlogger = org.apache.log4j.Logger.getLogger("visit");
 public void test() {
    visitlogger.info('写文件');
}