直接源码

package com.qds.phoenix.foundation.common.log;

import ch.qos.logback.classic.pattern.ExtendedThrowableProxyConverter;
import ch.qos.logback.classic.spi.CallerData;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.LayoutBase;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;

import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;

public class QdsLogLayout extends LayoutBase<ILoggingEvent> {
    private final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy年MM月dd日HH点mm分ss秒SSS");
    private final String L = "[";
    private final String R = "]";
    private final ExtendedThrowableProxyConverter throwableConverter = new ExtendedThrowableProxyConverter();

    public QdsLogLayout() {
        throwableConverter.start();
    }

    @Override
    public String doLayout(ILoggingEvent event) {
        JSONObject object = new JSONObject(2);
        String levelStr = event.getLevel().levelStr;
        object.put("level", levelStr);
        String loggerName = getMethod(event);
        object.put("class", loggerName);
        String format = Instant.ofEpochMilli(event.getTimeStamp()).atZone(ZoneId.systemDefault()).format(formatter);
        object.put("date", format);
        StringBuilder sb = new StringBuilder();
        sb.append(format)
            .append(StringUtils.SPACE)
            .append(levelStr)
            .append(StringUtils.SPACE)
            .append(L)
            .append(event.getThreadName())
            .append(R)
            .append(StringUtils.SPACE)
            .append(loggerName)
            .append(StringUtils.SPACE)
            .append(event.getFormattedMessage());
        if (event.getThrowableProxy() != null) {
            sb.append(CoreConstants.LINE_SEPARATOR)
                .append(throwableConverter.convert(event));
        }
        object.put("message", sb.toString());
        return object.toJSONString().concat(CoreConstants.LINE_SEPARATOR);
    }

    /**
     * 获取打印日志方法
     *
     * @param event
     * @return
     */
    private String getMethod(ILoggingEvent event) {
        StringBuilder sb = new StringBuilder(64);
        sb.append(event.getLoggerName())
            .append(CoreConstants.DOT);
        StackTraceElement[] cda = event.getCallerData();
        if (cda != null && cda.length > 0) {
            StackTraceElement element = cda[0];
            sb.append(element.getMethodName())
                .append(CoreConstants.COLON_CHAR)
                .append(element.getLineNumber());
        } else {
            sb.append(CallerData.NA);
        }
        return sb.toString();
    }
}