为java.util.logging自定义文件处理器及日志输出格式
为java.util.logging自定义文件处理器及日志输出格式 ?

package?com.xunlei.demo.util; ????import?java.io.PrintWriter; ?? import?java.io.StringWriter; ?? import?java.text.DecimalFormat; ?? import?java.util.Calendar; ?? import?java.util.logging.LogRecord; ?? ??/** ??*?Print?a?brief?summary?of?the?LogRecord?in?a?human?readable.?The?summary?will ??*?typically?be?on?a?single?line?(unless?it's?too?long?:)?...?what?I?meant?to ??*?say?is?that?we?don't?add?any?line?breaks). ??*? ??*?@author?ZengDong ??*/????public?class?XLLogFormatter?extends?java.util.logging.Formatter?{ ?? ????private?static?String?lineSeparator?=?System.getProperty("line.separator"); ?? ??????static?long?startTime?=?System.currentTimeMillis(); ?? ????private?static?DecimalFormat?threeDigFmt?=?new?DecimalFormat("000"); ?? ????private?static?DecimalFormat?twoDigFmt?=?new?DecimalFormat("00"); ?? ??????/** ??????*?Format?the?given?LogRecord. ??????*? ??????*?@param?record ??????*????????????the?log?record?to?be?formatted. ??????*?@return?a?formatted?log?record ??????*/??????//?private?final?static?String?format?=?"{0,date}?{0,time}"; ?? ????//?private?MessageFormat?formatter; ?? ????//?Date?dat?=?new?Date(); ?? ????//?private?Object?args[]?=?new?Object[1]; ?? ????public?synchronized?String?format(LogRecord?record)?{ ?? ????????StringBuilder?sb?=?new?StringBuilder(); ?? ????????//?dat.setTime(record.getMillis()); ?? ????????//?args[0]?=?dat; ?? ????????//?StringBuffer?text?=?new?StringBuffer(); ?? ????????//?if?(formatter?==?null)?{ ?? ????????//?formatter?=?new?MessageFormat(format); ?? ????????//?} ?? ????????//?formatter.format(args,?text,?null); ?? ????????//?sb.append(text); ?? ????????//?current?time ?? ????????//?Calendar?cal?=?Calendar.getInstance(); ?? ????????//?int?millis?=?cal.get(Calendar.MILLISECOND); ?? ????????//?sb.append('.').append(threeDigFmt.format(millis)).append('?'); ?? ??????????//?current?time ?? ????????Calendar?cal?=?Calendar.getInstance(); ??????????int?hour?=?cal.get(Calendar.HOUR_OF_DAY); ?? ????????int?minutes?=?cal.get(Calendar.MINUTE); ?? ????????int?seconds?=?cal.get(Calendar.SECOND); ?? ????????int?millis?=?cal.get(Calendar.MILLISECOND); ?? ????????sb.append(twoDigFmt.format(hour)).append(':'); ?? ????????sb.append(twoDigFmt.format(minutes)).append(':'); ?? ????????sb.append(twoDigFmt.format(seconds)).append('.'); ?? ????????sb.append(threeDigFmt.format(millis)).append('?'); ?? ??????????//?log?level ?? ????????sb.append(record.getLevel().getLocalizedName()); ??????????sb.append(":?"); ?? ??????????//?caller?method ?? ????????int?lineNumber?=?inferCaller(record); ?? ????????String?loggerName?=?record.getLoggerName(); ????????????if?(loggerName?==?null) ?? ????????????loggerName?=?record.getSourceClassName(); ????????????if?(loggerName.startsWith("com.xunlei.callcenter."))?{ ?? ????????????sb.append(loggerName.substring("com.xunlei.callcenter.".length())); ?? ????????}?else?? ????????????sb.append(record.getLoggerName()); ????????????if?(record.getSourceMethodName()?!=?null)?{ ?? ????????????sb.append('.'); ?? ????????????sb.append(record.getSourceMethodName()); ????????????????//?include?the?line?number?if?we?have?it. ?? ????????????if?(lineNumber?!=?-1) ?? ????????????????sb.append("().").append(Integer.toString(lineNumber)); ?? ????????????else?? ????????????????sb.append("()"); ?? ????????} ??????????sb.append('?'); ?? ????????sb.append(record.getMessage()); ??????????sb.append(lineSeparator); ??????????if?(record.getThrown()?!=?null)?{ ?? ????????????try?{ ?? ????????????????StringWriter?sw?=?new?StringWriter(); ?? ????????????????PrintWriter?pw?=?new?PrintWriter(sw); ?? ????????????????record.getThrown().printStackTrace(pw); ??????????????????pw.close(); ??????????????????sb.append(sw.toString()); ??????????????}?catch?(Exception?ex)?{ ?? ????????????} ??????????} ??????????return?sb.toString(); ?? ????} ????????/** ??????*?Try?to?extract?the?name?of?the?class?and?method?that?called?the?current ??????*?log?statement. ??????*? ??????*?@param?record ??????*????????????the?logrecord?where?class?and?method?name?should?be?stored. ??????*? ??????*?@return?the?line?number?that?the?call?was?made?from?in?the?caller. ??????*/??????private?int?inferCaller(LogRecord?record)?{ ?? ????????//?Get?the?stack?trace. ?? ????????StackTraceElement?stack[]?=?(new?Throwable()).getStackTrace(); ?? ??????????//?the?line?number?that?the?caller?made?the?call?from ?? ????????int?lineNumber?=?-1; ?? ??????????//?First,?search?back?to?a?method?in?the?XLCallCenter?Logger?class. ?? ????????int?ix?=?0; ?? ????????while?(ix?<?stack.length)?{ ?? ????????????StackTraceElement?frame?=?stack[ix]; ??????????????String?cname?=?frame.getClassName(); ??????????????if?(cname.equals("com.xunlei.demo.util.Logger"))?{ ?? ????????????????break; ?? ????????????} ??????????????ix++; ??????????} ??????????//?Now?search?for?the?first?frame?before?the?XLCallCenter?Logger?class. ?? ????????while?(ix?<?stack.length)?{ ?? ????????????StackTraceElement?frame?=?stack[ix]; ??????????????lineNumber?=?stack[ix].getLineNumber(); ??????????????String?cname?=?frame.getClassName(); ??????????????if?(!cname.equals("com.xunlei.demo.util.Logger"))?{ ?? ????????????????//?We've?found?the?relevant?frame. ?? ????????????????record.setSourceClassName(cname); ??????????????????record.setSourceMethodName(frame.getMethodName()); ??????????????????break; ?? ????????????} ??????????????ix++; ??????????} ????????????return?lineNumber; ?? ????} ??}