现在有些日子我花在java logger上：log4j2 如果您决定使用.xml文件进行工作，则该方法相对容易。 但是如果你想通过代码创建配置，并通过java进行调整，那就有点复杂了。
我现在可以管理的代码下面。 我没有成功重新配置日志级别
每次深度都在错误级别停止
2017-03-15 23:24:27,248 [main] ERROR: This is Logger for 1 Error
2017-03-15 23:24:27,256 [main] ERROR: This is Logger 1 Error
您能帮忙指定如何重新加载编程的log4j2配置吗？
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.appender.ConsoleAppender;
import org.apache.logging.log4j.core.config.Configurator;
import org.apache.logging.log4j.core.config.builder.api.AppenderComponentBuilder;
import org.apache.logging.log4j.core.config.builder.api.ConfigurationBuilder;
import org.apache.logging.log4j.core.config.builder.api.ConfigurationBuilderFactory;
import org.apache.logging.log4j.core.config.builder.api.LayoutComponentBuilder;
import org.apache.logging.log4j.core.config.builder.impl.BuiltConfiguration;
public class Log4j2Init {
// -------------------------------------------------------
// CONSTRUCTOR
// -------------------------------------------------------
public Log4j2Init() {
}
// -------------------------------------------------------
// TEST
// -------------------------------------------------------
public static void main(String[] args) {
Logger logger;
Log4j2Init log4j2Init = new Log4j2Init();
log4j2Init.addAppenderLogger("./pac-tool.log",Level.ERROR);
logger = LogManager.getLogger(Log4j2Init.class.getName());
logger.info("This is Logger for 1 Info");
logger.error("This is Logger for 1 Error");
logger.debug("This is Logger for 1 Debug");
logger.trace("This is Logger for 1 Trace");
// Reconfiguration of log depth
log4j2Init.addAppenderLogger("./pac-tool.log",Level.TRACE);
logger = LogManager.getLogger(Log4j2Init.class.getName());
logger.info("This is Logger 1 Info");
logger.error("This is Logger 1 Error");
logger.debug("This is Logger 1 Debug");
logger.trace("This is Logger 1 Trace");
}
// -------------------------------------------------------
// METHOD
// -------------------------------------------------------
public void addAppenderLogger(String filename, Level vlevel )
{
ConfigurationBuilder< BuiltConfiguration > builder;
LayoutComponentBuilder layoutBuilder;
AppenderComponentBuilder appenderBuilder;
// Create log4j2 Builder
builder = ConfigurationBuilderFactory.newConfigurationBuilder();
builder.setStatusLevel( Level.INFO);
builder.setConfigurationName("BuilderTest");
// ------------------------------------------
// CONSOLE
// ------------------------------------------
// PatternLayout
layoutBuilder = builder.newLayout("PatternLayout")
.addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable");
// Create Console Appender : Type = "CONSOLE"
appenderBuilder =
builder.newAppender("Stdout", "CONSOLE")
.addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT)
.add(layoutBuilder);
builder.add( appenderBuilder );
// ------------------------------------------
// FILE
// ------------------------------------------
// PatternLayout
layoutBuilder = builder.newLayout("PatternLayout")
.addAttribute("pattern", "%d{yyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n");
// Create File Appender : Type = "FILE"
appenderBuilder = builder.newAppender("logfile", "FILE")
.addAttribute("fileName", filename)
.addAttribute("append", "false")
.addAttribute("immediateFlush", "false")
.add(layoutBuilder);
builder.add(appenderBuilder);
// create the new logger
builder.add( builder.newRootLogger( vlevel )
.add( builder.newAppenderRef( "Stdout" ) )
.add( builder.newAppenderRef( "logfile" ) )
);
Configurator.initialize(builder.build());
}
}
由于
答案 0 :(得分：1)
解决方案：
import java.nio.file.Paths;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.Appender;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.LoggerConfig;
public class Log4j2Init {
private String logPath;
// -------------------------------------------------------
// CONSTRUCTOR
// -------------------------------------------------------
/**
* Initialize Log4j2
* Configure log path which will be used in "log4j2.xml"
* Common error is caused by the static logger
* If you logs before the System.setProperty, this will cause the variable UNDEFINED error.
* private static final Logger logger = LogManager.getLogger(test.class.getName());
* is forbidden here !!
*/
public Log4j2Init() {
logPath = Paths.get(getUserAppDirectory()+"/Pac-Tool").toString();
System.setProperty("logpath.name",logPath);
}
// -------------------------------------------------------
// TEST
// -------------------------------------------------------
public static void main(String[] args) {
Log4j2Init log4j2Init = new Log4j2Init();
System.out.println("Pat of the Log File : " + log4j2Init.getLogPath());
// Create the Logger
Logger logger = LogManager.getLogger(Log4j2Init.class.getName());
@SuppressWarnings("resource")
LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
Configuration config = ctx.getConfiguration();
LoggerConfig loggerConfig = config.getLoggerConfig(LogManager.ROOT_LOGGER_NAME);
// Read the Appenders
System.out.println("Appenders declared in .xml :" + loggerConfig.getAppenderRefs());
System.out.println("Appenders used in Logger :" + loggerConfig.getAppenders());
// Apply the level specified in log4j2.xml
System.out.println("Log Level (default in .xml)= " + loggerConfig.getLevel());
logger.error("This is Logger for 1 Error");
logger.info("This is Logger for 1 Info");
logger.debug("This is Logger for 1 Debug");
logger.trace("This is Logger for 1 Trace");
// Remove Console Logger + Set new log level
loggerConfig.removeAppender("Console");
loggerConfig.setLevel(Level.TRACE);
ctx.updateLoggers();
System.out.println("Log Level = " + loggerConfig.getLevel());
System.out.println("Appenders used in Logger :" + loggerConfig.getAppenders());
logger.error("This is Logger 2 Error");
logger.info("This is Logger 2 Info");
logger.debug("This is Logger 2 Debug");
logger.trace("This is Logger 2 Trace");
// Add Appender
Appender appender = config.getAppender("Console");
loggerConfig.addAppender(appender, Level.TRACE, null );
ctx.updateLoggers();
System.out.println("Log Level = " + loggerConfig.getLevel());
System.out.println("Appenders used in Logger :" + loggerConfig.getAppenders());
logger.error("This is Logger 3 Error");
logger.info("This is Logger 3 Info");
logger.debug("This is Logger 3 Debug");
logger.trace("This is Logger 3 Trace");
}
/**
* getUserAppDirectory
* @return
*/
private String getUserAppDirectory() {
String workingDirectory;
String OS = (System.getProperty("os.name")).toUpperCase();
if (OS.contains("WIN"))
{
//it is simply the location of the "AppData" folder
workingDirectory = System.getenv("AppData");
}
else
{
//Otherwise, we assume Linux or Mac
workingDirectory = System.getProperty("user.home");
//if we are on a Mac, we are not done, we look for "Application Support"
workingDirectory += "/Library/Application Support";
}
return workingDirectory;
}
public String getLogPath() {
return logPath;
}
}
答案 1 :(得分：0)
使用.xml
<?xml version="1.0" encoding="UTF-8"?>
<!-- status will define the configuration level of log4j2 configuration file -->
<Configuration status="error" name="XMLPACTOOL">
<Appenders>
<!-- Generate Log in console -->
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %logger{36} - %msg%n" />
</Console>
<!-- Generate Log in file -->
<File name="LogFile" fileName="${sys:logpath.name}/Pac-Tool.log"
immediateFlush="false" append="false">
<PatternLayout
pattern="%d{yyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</File>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="Console" />
<AppenderRef ref="LogFile" />
</Root>
</Loggers>
</Configuration>