不在 Logger 的控制台中打印日志

Question

我已经删除了代码中的所有 system.out.println()，并添加了 apache log4j 的 Logger。但是我的控制台中没有打印任何内容。这是我的 log4j.properties 文件

# Define the root logger with appender X
log4j.rootLogger = DEBUG, X

# Set the appender named X to be a File appender
log4j.appender.X=org.apache.log4j.FileAppender

# Define the layout for X appender
log4j.appender.X.layout=org.apache.log4j.PatternLayout
log4j.appender.X.layout.conversionPattern=%m%n

我正在调用记录器类，如下所示

Logger log = Logger.getLogger(PersonImpl.class.getName());

除了我的 log.info() 之外，还打印了其他日志。

DEBUG [http-bio-8080-exec-3] (Table.java:505) - No alter strings for table : hibernate_sequence
DEBUG [http-bio-8080-exec-3] (JtaPlatformInitiator.java:42) - No JtaPlatform was specified, checking resolver
DEBUG [http-bio-8080-exec-3] (JtaPlatformResolverInitiator.java:33) - No JtaPlatformResolver was specified, using default [org.hibernate.engine.transaction.jta.platform.internal.StandardJtaPlatformResolver]
DEBUG [http-bio-8080-exec-3] (StandardJtaPlatformResolver.java:101) - Could not resolve JtaPlatform, using default [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
DEBUG [http-bio-8080-exec-3] (NamedQueryRepository.java:149) - Checking 0 named HQL queries
DEBUG [http-bio-8080-exec-3] (NamedQueryRepository.java:165) - Checking 0 named SQL queries

Answer 1

您只添加了一个FileAppender（这将导致日志仅写入文件中），但如果您还希望在控制台中完成日志记录，您还需要添加一个ConsoleAppender。

可以这样做：

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

并在rootLogger中添加appender的名称，像这样

log4j.rootLogger = DEBUG, X, stdout

除此之外，如果你想关闭 Hibernate 特定的日志，你将不得不这样做

log4j.logger.org.hibernate=fatal or log4j.logger.org.hibernate=off

希望这会有所帮助！

祝你好运！

Answer 2

将此代码用于您要实际生成日志的类。

private static final Logger LOGGER = Logger.getLogger("Class Name Where u used");
LOGGER.error ("string which u want to print");
LOGGER.info("string which u want to print");
LOGGER.warn("string which u want to print");

使用我在项目中使用的此设置。它会将您的日志生成到控制台以及 logger.out 到您的项目目录

log4j.rootLogger=INFO, FILE

# Define the file appender
log4j.appender.FILE=org.apache.log4j.RollingFileAppender
log4j.appender.FILE.File=logger.out
log4j.appender.FILE.MaxFileSize=1MB
log4j.appender.FILE.MaxBackupIndex=100

# Define the layout for file appender
   log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
   log4j.appender.FILE.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.conversionPattern=%m%n

乐于助人！

Answer 3

你可以打印文件中的日志

log4php.appender.services = LoggerAppenderDailyFile

log4php.appender.services.layout = LoggerLayoutPattern

log4php.appender.services.datePattern = Y-m-d

log4php.appender.services.file = /home/Logs_%s

log4php.appender.services.layout.ConversionPattern = "%24d{ISO8601} [%p] %F:%L %m %n"

log4php.rootLogger = 调试、服务

Answer 4

试试这个：

log4j.rootLogger=调试，标准输出

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.Target=System.out

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout