java util logging配置属性文件

Question

我有一个maven项目，我在其中编写了一个java.util.logging过滤器，如下所示。

package com.xyz.filters;

import java.util.logging.Filter;
import java.util.logging.LogRecord;

class CustomFilter implements Filter {

 public boolean isLoggable(LogRecord record) {
    return record.getLoggerName().indexOf("com.package.name") != -1;
 }
}

我有一个属性文件，我在其中配置了控制台和文件处理程序，除了删除文件中不需要的日志外，还需要添加过滤器。 我按如下方式添加了过滤器：

java.util.logging.FileHandler.filter = com.xyz.filters.CustomFilter

但是不应用过滤器。我在这里做错了什么。

更新：添加配置文件

    ############################################################
#   Default Logging Configuration File
#
# You can use a different file by specifying a filename
# with the java.util.logging.config.file system property.  
# For example java -Djava.util.logging.config.file=myfile
############################################################

############################################################
#   Global properties
#   NOTE: this configuration file use to get the handler list,
#   Properties(except level property) define for each handler
#   may be not available because LogRecords handover to log4j
#   appenders in runtime.
############################################################

# "handlers" specifies a comma separated list of log Handler 
# classes.  These handlers will be installed during VM startup.
# Note that these classes must be on the system classpath.
# By default we only configure a ConsoleHandler, which will only
# show messages at the INFO and above levels.
#handlers= java.util.logging.ConsoleHandler

# To also add the FileHandler, use the following line instead.
#handlers= java.util.logging.FileHandler
# Add org.wso2.carbon.bootstrap.logging.handlers.LogEventHandler to handlers if you need to push java logs to LOGEVENT appender

handlers=java.util.logging.FileHandler, java.util.logging.ConsoleHandler

# Default global logging level.
# This specifies which kinds of events are logged across
# all loggers.  For any given facility this global level
# can be overriden by a facility specific level
# Note that the ConsoleHandler also has a separate level
# setting to limit messages printed to the console.
.level= INFO

############################################################
# Handler specific properties.
# Describes specific configuration info for Handlers.
#

java.util.logging.FileHandler.level = FINE
java.util.logging.FileHandler.pattern = /path/to/custom.log
java.util.logging.FileHandler.limit = 50000
java.util.logging.FileHandler.count = 1
java.util.logging.FileHandler.formatter = java.util.logging.SimpleFormatter
java.util.logging.SimpleFormatter.format = [%1$tY-%1$tm-%1$td %1$tk:%1$tM:%1$tS,%1$tL]  %4$s {%2$s} - %5$s %6$s %n
java.util.logging.FileHandler.filter = om.xyz.filters.CustomFilter

java.util.logging.ConsoleHandler.level = INFO


############################################################
# Facility specific properties.
# Provides extra control for each logger.
############################################################

# For example, set the com.xyz.foo logger to only log SEVERE
# messages:
#com.xyz.foo.level = SEVERE
com.package.name.level = FINE

Answer 1

问题是缺少访问修饰符。

如果没有使用访问修饰符指定类，则默认为private-package，这只在包中可见。因此，FileHandler将.filter属性读为null。如果将其更改为public，则会过滤掉过滤器。更正后的代码可以在下面找到。

public class CustomFilter implements Filter {

 public boolean isLoggable(LogRecord record) {
    return record.getLoggerName().indexOf("com.package.name") != -1;
 }
}

Answer 2

这可能不是您问题的完整答案，但在我看来，您试图从无用的噪音中过滤掉Web应用程序中的日志。我实际上写了一个处理这个问题的开源库。您可以配置与您相关的软件包，该实用程序将非常巧妙地过滤掉堆栈跟踪，使您仍然可以看到包含＆＃34;由＆＃34;引起的跟踪。跟踪，但无用的包将被过滤掉。您可以将此库作为Maven工件（包括javadoc和源）或作为您可以自行修改的源代码。这篇文章描述了实用程序的功能以及从何处获取它。 Open Source Java library with stack trace filtering, Silent String parsing Unicode converter and Version comparison。请参阅段落＆＃34; Stacktrace噪音过滤器＆＃34;

Answer 3

我使用了上面解释的方式，看到在记录过程中根本没有调用isLoggable（）方法。

在我的场景中，如下所示在每个java文件中启动Logger对象。

`package abc.def.geh.ijk;
private static Logger logger = Logger.getLogger(lmn.class.getName());
logger.log(Level.SEVERE, "Failed to get ConnectionFactory", ex);`

我在记录器属性中保留了以下其他标准行：

java.util.logging.FileHandler.filter = abc.def.geh.ijk.LoggingFilter abc.def.geh.ijk.level=INFO

Java文件如下：

`package abc.def.geh.ijk;     导入java.util.logging.Filter;     导入java.util.logging.LogRecord;

public class LoggingFilter implements Filter{
public boolean isLoggable(LogRecord record) {
return record.getLoggerName().indexOf("abc.def.geh.ijk") != -1;
}
}`