public class MsgConverter extends ClassicConverter {

 @Override
 public String convert(ILoggingEvent event) {
 return JsonUtils.serialize(event.getFormattedMessage());

 }
}

public class StackTraceConverter extends ThrowableProxyConverter {
 @Override
 public String convert(ILoggingEvent event) {
 IThrowableProxy throwableProxy = event.getThrowableProxy();
 // 如果沒有異信息
 if (throwableProxy == null) {
 //返回字符串 ： "\"\""
 return JsonUtils.serialize("");
 }
 String ex = super.convert(event);
 return JsonUtils.serialize(ex);
 }
}

<configuration>
 <conversionRule conversionWord="exdiy" converterClass="xxx.logback.converter.StackTraceConverter" />
 <conversionRule conversionWord="msgdiy" converterClass="xxx.logback.converter.MsgConverter" />
</configuration>

<layout>
 <!--<Pattern>{"date":"%date{yyyy-MM-dd HH:mm:ss.SSS}","level":"%level","tid":"%tid","className":"%logger","fileLine":"%file:%line","msg":%message, "stack_trace":%ex }%n</Pattern>-->
 <Pattern>{"date":"%date{yyyy-MM-dd HH:mm:ss.SSS}","level":"%level","className":"%logger","fileName":"%file","thread":"%thread","msg":%msgdiy, "stack_trace":%exdiy}%n</Pattern>
</Pattern>

{
 "date":"2019-01-02 16:16:33.817",
 "level":"INFO",
 "className":"org.springframework.web.servlet.DispatcherServlet","fileName":"FrameworkServlet.java","thread":"http-nio-8762-exec-1","msg":"FrameworkServlet 'dispatcherServlet': initialization completed in 38 ms", "stack_trace":"" 
}

json {
 source => "message"
 #target => "doc"
 remove_field => ["message"]
 }
 date {
 match => ["date","yyyy-MM-dd HH:mm:ss.SSS"]
 target => "@timestamp"
 locale => "cn"
 timezone => "Asia/Shanghai"
 }