spring SimpleFormatter 源码
springboot SimpleFormatter 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/java/SimpleFormatter.java
/*
* Copyright 2012-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.logging.java;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;
import org.springframework.boot.logging.LoggingSystemProperties;
/**
* Simple 'Java Logging' {@link Formatter}.
*
* @author Phillip Webb
* @since 1.0.0
*/
public class SimpleFormatter extends Formatter {
private static final String DEFAULT_FORMAT = "[%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS.%1$tL] - %8$s %4$s [%7$s] --- %3$s: %5$s%6$s%n";
private final String format = getOrUseDefault("LOG_FORMAT", DEFAULT_FORMAT);
private final String pid = getOrUseDefault(LoggingSystemProperties.PID_KEY, "????");
private final Date date = new Date();
@Override
public synchronized String format(LogRecord record) {
this.date.setTime(record.getMillis());
String source = record.getLoggerName();
String message = formatMessage(record);
String throwable = getThrowable(record);
String thread = getThreadName();
return String.format(this.format, this.date, source, record.getLoggerName(),
record.getLevel().getLocalizedName(), message, throwable, thread, this.pid);
}
private String getThrowable(LogRecord record) {
if (record.getThrown() == null) {
return "";
}
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
printWriter.println();
record.getThrown().printStackTrace(printWriter);
printWriter.close();
return stringWriter.toString();
}
private String getThreadName() {
String name = Thread.currentThread().getName();
return (name != null) ? name : "";
}
private static String getOrUseDefault(String key, String defaultValue) {
String value = null;
try {
value = System.getenv(key);
}
catch (Exception ex) {
// ignore
}
if (value == null) {
value = defaultValue;
}
return System.getProperty(key, value);
}
}
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- 所属分类： 后端技术
- 本文标签： Spring Boot Java Spring
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