log4j自定义日志文件名及日志输出格式

package com.songy; import java.io.File; import java.io.IOException; import java.io.InterruptedIOException; import java.lang.management.ManagementFactory; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.log4j.RollingFileAppender; import org.apache.log4j.helpers.CountingQuietWriter; import org.apache.log4j.helpers.LogLog; import org.apache.log4j.spi.LoggingEvent; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class ExRollingFileAppender extends RollingFileAppender{ private long nextRollover = 0; private String level; SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHH"); @Override public void rollOver() { File target; File file; if (qw != null) { long size = ((CountingQuietWriter) qw).getCount(); nextRollover = size + maxFileSize; } LogLog.debug("maxBackupIndex=" + maxBackupIndex); boolean renameSucceeded = true; if (maxBackupIndex > 0) { //计算当前日志文件夹下的文件数量是否超过阈值，超过则进行删除 countFile(fileName,maxBackupIndex); // 所有文件名序号加1 for (int i = maxBackupIndex - 1; i >= 1 && renameSucceeded; i--) { file = new File(getFileName(fileName,i)); if (file.exists()) { target = new File(getFileName(fileName,i+1)); renameSucceeded = file.renameTo(target); } } if (renameSucceeded) { target = new File(getFileName(fileName,1)); this.closeFile(); file = new File(fileName); renameSucceeded = file.renameTo(target); if (!renameSucceeded) { try { this.setFile(fileName, true, bufferedIO, bufferSize); } catch (IOException e) { if (e instanceof InterruptedIOException) { Thread.currentThread().interrupt(); } LogLog.error("setFile(" + fileName + ", true) call failed.", e); } } } } if (renameSucceeded) { try { this.setFile(fileName, false, bufferedIO, bufferSize); nextRollover = 0; } catch (IOException e) { if (e instanceof InterruptedIOException) { Thread.currentThread().interrupt(); } LogLog.error("setFile(" + fileName + ", false) call failed.", e); } } } /** * * @Description: 获取日志文件名，文件名的格式为：coms_AUDIT_PC-20170705BLZI_2017122909_001.log * 按照小时和文件大小进行日志文件的新增，首先判断当前文件是否在一小时内，如果在则判断大小是否超过设置值，如果超过则序号增加，创建新文件 * @author songy * @date 2017年12月29日 上午11:02:34 */ private String getFileName(String name,int i) { String computerName = ManagementFactory.getRuntimeMXBean().getName(); String computers = computerName.split("@")[1]; String date = sdf.format(new Date()); String fileName = "coms_"+level+"_"+computers+"_"+date+"_"; String filePath = ""; int nums = 0; String strNum = ""; if(name.indexOf("_") != -1){ String names = name.substring(name.lastIndexOf("_")+1, name.indexOf(".")); if(!"".equals(names) && names != null){ nums = Integer.parseInt(names); } } nums= nums + i; nums=nums==1000?1:nums; strNum = nums>=10?(nums>=100?nums+"":"0"+nums):"00"+nums; filePath = name.substring(0, name.lastIndexOf("/")); fileName = filePath + "/" + fileName + strNum + ".log"; LogLog.debug("文件名："+fileName); return fileName; } @Override protected void subAppend(LoggingEvent event) { super.subAppend(event); level = event.level.toString(); if (fileName != null && qw != null) { long size = ((CountingQuietWriter) qw).getCount(); boolean flag = diffDate(fileName); if ((size >= maxFileSize && size >= nextRollover) || flag) { rollOver(); } } } /** * * @Description: 根据文件名获取其中的时间，计算当前时间和文件名中的时间差，确定是否创建新文件 * 文件名当前的格式为：coms_AUDIT_PC-20170705BLZI_2017122909_001.log * @author songy * @date 2017年12月29日 上午10:48:21 * @param name 日志文件名 */ public static boolean diffDate(String name){ boolean flag = false; long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数 long nh = 1000 * 60 * 60;// 一小时的毫秒数 SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddhh"); if(name.indexOf("_") != -1){ //first_name截取后的字符串为coms_AUDIT_PC-20170705BLZI_2017122909 String first_name = name.substring(0,name.lastIndexOf("_")); if(first_name.indexOf("_") != -1){ String second_name = first_name.substring(first_name.lastIndexOf("_")+1, first_name.length()); try { Date file_time = sdf.parse(second_name); Date current_time = new Date(); long diff = current_time.getTime() - file_time.getTime(); long hour = diff % nd / nh; if(hour >= 1){ flag = true; } } catch (ParseException e) { e.printStackTrace(); } } } return flag; } /** * * @Description: 计算日志文件个数，当达到最大保留数时，将最早生成的日志文件删除 * @author songy * @date 2017年12月29日 下午1:54:30 * @param fileName 文件名称（包括路径） */ public static void countFile(String fileName,int maxBackupIndex){ String filePath = fileName.substring(0, fileName.lastIndexOf("/")); LogLog.debug("日志文件夹："+filePath); File file = new File(filePath); if(file.isDirectory()){ File[] files = file.listFiles(); if(files.length > maxBackupIndex){ DelLogFile.filePath = filePath; //删除文件时单独启动一个线程进行 new DelLogFile().start(); } } } }