[英]Only logging fatal and error messages while using log4j
I am new to log4j and trying to use log4j programmatically instead of using log4j.xml OR log4j.properties file.
但是当我运行代码时,它只记录致命和错误消息并跳过其他消息。
我试过改变“rootlogger.setLevel(Level.DEBUG);” 到“rootlogger.setLevel(Level.All);” 但它给出了相同的 output。
有人可以在这里帮忙吗?
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.ConsoleAppender;
public class ProgrammaticLog4jExample {
private static final Logger logger = Logger.getLogger(ProgrammaticLog4jExample.class);
public static void main(String[] args) {
// creates pattern layout
String conversionPattern = "%-7p %d [%t] %c %x - %m%n";
PatternLayout layout = new PatternLayout(conversionPattern);
// creates console appender
ConsoleAppender consoleAppender = new ConsoleAppender();
consoleAppender.setLayout(layout);
consoleAppender.activateOptions();
// configure the root logger
Logger rootlogger = Logger.getRootLogger();
rootlogger.setLevel(Level.DEBUG);
rootlogger.addAppender(consoleAppender);
// creates a custom logger and messages
logger.debug("this is a debug log message");
logger.info("this is a information message");
logger.warn("this is a warning message");
logger.fatal("this is the fatal message");
logger.error("This is the error message");
}
}
output:
19:07:58.003 [main] FATAL log4jExample.ProgrammaticLog4jExample - 这是致命的消息
19:07:58.006 [main] ERROR log4jExample.ProgrammaticLog4jExample - 这是错误消息
output 图片:
我在我的项目类路径中为 log4j 使用下面的 jar 文件:
啊哈……做了一些实验后,我得到了答案。
添加了“logger.setLevel(Level.DEBUG);” 我现在可以获取所有日志。 :-)
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;
public class ProgrammaticLog4jExample {
private static final Logger logger = Logger.getLogger(ProgrammaticLog4jExample.class);
public static void main(String[] args) {
// creates pattern layout
String conversionPattern = "%-7p %d [%t] %c %x - %m%n";
PatternLayout layout = new PatternLayout(conversionPattern);
// creates console appender
ConsoleAppender consoleAppender = new ConsoleAppender();
consoleAppender.setLayout(layout);
consoleAppender.activateOptions();
// configure the root logger
Logger rootlogger = Logger.getRootLogger();
rootlogger.setLevel(Level.DEBUG);
rootlogger.addAppender(consoleAppender);
logger.setLevel(Level.DEBUG);
// creates a custom logger and messages
// Logger logger = Logger.getLogger(ProgrammaticLog4jExample.class.getName());
logger.debug("this is a debug log message");
logger.info("this is a information message");
logger.warn("this is a warning message");
logger.fatal("this is the fatal message");
logger.error("This is the error message");
}
}
Output 图片:
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