Log4j2 custom layout error error RollingFile contains an invalid element or attribute FLayout
Use log4j2-2.8.1 version,
Custom a FLayout below

 
Package com.com mon; 
Import the Java. Nio. Charset. Charset; 
Import the Java. Util. Arrays; 
import java.util.Date; 
import java.util.List; 

The import org. Apache. Logging. Log4j. Core. Config. The Configuration; 
The import org. Apache. Logging. Log4j. Core. Config. The Node; 
The import org. Apache. Logging. Log4j. Core. Layout; 
The import org. Apache. Logging. Log4j. Core. LogEvent; 
The import org. Apache. Logging. Log4j. Core. Config. Plugins. The Plugin; 
The import org. Apache. Logging. Log4j. Core. Config. Plugins. PluginAttribute; 
The import org. Apache. Logging. Log4j. Core. Config. Plugins. PluginConfiguration; 
The import org. Apache. Logging. Log4j. Core. Config. Plugins. PluginFactory; 
The import org. Apache. Logging. Log4j. Core. Layout. AbstractStringLayout; 
The import org. Apache. Logging. Log4j. Core. The pattern. LogEventPatternConverter; 
The import org. Apache. Logging. Log4j. Core. The pattern. PatternFormatter; 
The import org. Apache. Logging. Log4j. Core. The pattern. PatternParser; 

@ the Plugin (name="FLayout", a category=Node. The category, elementType=Layout. ELEMENT_TYPE, printObject=true) 
Public final class FLayout extends AbstractStringLayout {
Private static final String KEY="Converter"; 
Private final PatternSerializer fPatternSerializer; 

Private FLayout (final Configuration config, final Charset Charset, final String pattern, final String headerPattern, 
Final String footerPattern) {
Super (config, charset, new PatternSerializer (getPatternFormatter (config, headerPattern)), 
New PatternSerializer (getPatternFormatter (config, footerPattern))); 
Enclosing fPatternSerializer=new PatternSerializer (getPatternFormatter (config, pattern)); 
} 

@ PluginFactory 
Public static FLayout createLayout (@ PluginConfiguration final Configuration config, 
@ PluginAttribute (value="https://bbs.csdn.net/topics/charset", defaultString="utf-8") final Charset Charset, 
@ PluginAttribute (" pattern ") String pattern, 
@ PluginAttribute (" header ") String headerPattern, 
@ PluginAttribute (" footer ") String footerPattern) {
If (the pattern==null) {
The pattern="% d {yyyy/MM/dd HH: MM: ss. The SSS} : % m % n"; 
} 
If (headerPattern==null) {
HeaderPattern="% m % n"; 
} 
If (footerPattern==null) {
FooterPattern="% m % n"; 
} 

Return new FLayout (config, charset, pattern, headerPattern, footerPattern); 
} 

@ Override 
Public String toSerializable (final LogEvent event) {
Return this. FPatternSerializer. ToSerializable (event); 
} 

Public static PatternFormatter [] getPatternFormatter (final Configuration config, final String pattern) {
Final PatternParser parser=createPatternParser (config); 
Final List List=parser. Parse (pattern); 
Final PatternFormatter [] formatters=list. ToArray (new PatternFormatter [0]). 
Return formatters. 
} 


Public static PatternParser createPatternParser (final Configuration config) {
If (config==null) {
Return new PatternParser (config, KEY, LogEventPatternConverter. Class); 
} 
PatternParser parser=config. GetComponent (KEY); 
If (parser==null) {
Parser=new PatternParser (config, KEY, LogEventPatternConverter. Class); 
Config. AddComponent (KEY, parser); 
Parser=config. GetComponent (KEY); 
} 
Return parser. 
} 



@ Override 
Public byte [] toByteArray (LogEvent loge) {
{if ((loge==null)) 
return null; 
} 
String formatLoge=toSerializable (loge); 
Return formatLoge. GetBytes (); 
} 

} 

 package com.com mon; 

Import the Java. Util. Arrays; 

The import org. Apache. Logging. Log4j. Core. LogEvent; 
The import org. Apache. Logging. Log4j. Core. Layout. AbstractStringLayout. Serializer; 
The import org. Apache. Logging. Log4j. Core. Layout. AbstractStringLayout. Serializer2; 
The import org. Apache. Logging. Log4j. Core. The pattern. PatternFormatter; 
The import org. Apache. Logging. Log4j. Util. PropertiesUtil; 

Public class PatternSerializer implements Serializer, Serializer2 {

Public final PatternFormatter [] formatters; 
Public PatternSerializer (final PatternFormatter formatters) [] {
super(); 
Enclosing formatters=formatters; 

} 
Protected the static final ints DEFAULT_STRING_BUILDER_SIZE=1024; 

Protected the static final ints MAX_STRING_BUILDER_SIZE=Math. Max (DEFAULT_STRING_BUILDER_SIZE, 
The size (" log4j layoutStringBuilder maxSize ", 2 * 1024)); 
Private static final ThreadLocal ThreadLocal=new ThreadLocal<> (a); 

/* * 
* Returns a {@ code StringBuilder} that this Layout implementation can use to write the formatted log event to. 
* 
* @ return a {@ code StringBuilder} 
*/
Protected the static StringBuilder getStringBuilder () {
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