java.util.logging

问题 We have some common logging configuration between all of the webapps on a given system that we are trying to externalize to the level of tomcat, rather than trying to handle at the level of the individual webapp. The webapps that are using java.util.logging are proving to be somewhat challenging because we have a custom handler, and there doesn't seem to be an obvious way to get the custom handler to play nicely with tomcat's classloaders. This is all in the prototype stage at the moment.

问题 I'm currently observing that a 3rd party library (namely restfb) is using java.util.logging and I'm seeing those logs end up in STDOUT even though I don't have an SLF4J console appender configured in my logback.xml. I also have the jul-to-slf4j bridge in my classpath. Does the jul-to-slf4j bridge only log to the appenders configured by logback when the bridge is installed or does it also log to stdout? 回答1: You need to call SLF4JBridgeHandler.install(). You also need to enable all log levels

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . I want to use logs in my program. I heard about java.util.logging, but I don't know how to begin. Are there any examples of what can I do with logging? How would I use logging in my own program? 回答1: java.util.logging keeps you from having to tote one more jar file around with

问题 I am using JUL in my application. Normally, Netbeans opens an output tab that reads "Tomcat" and shows the logs I produce. It was working fine. But suddenly, I realise that my logs are not shown at all, only the System.out get printed. Not even the higuest LOG.log(Level.SEVERE, ".... . } catch(Exception e) { System.out.println("This gets printed in Netbeans tab"); LOG.log(Level.SEVERE, "This doesnt"); } I suspect it can be a library I included, which is messing with my logs. Is that possible

问题 I have a problem starting JBoss version 7.0.2 on Windows 7. I got this error also with Jboss 7.1.1 and 7.1.0 so I thought reverting to an older and more stable version would do the trick, but with no use. Below is the problem - the LogManager was not properly installed. I have not deployed anything that might use the logger or anything, I just run standalone.bat after a clean install and restart. I found this issue but it seems to be resolved... The funny thing is, I was able to start it from

问题 I am using the below code to log entry, exit and exceptions using aspects. This way I have to define a bean for every class in my application in my ApplicationContext and it becomes cumbersome to maintain such length of bean definitions and their properties. Can you help me simplify this? I don't think it is appropriate design to define bean everytime I create a class. Help is appreciated, thanks in advance. <bean id="logEntryBean" class="com.example.logging.LogEntry" /> <bean id="logExitBean

问题 I am using the Java Logger in the java.util.logging package. This is how I create the logger currently: FileHandler fileHandler = new FileHandler(filePath, 5242880, 5, true); fileHandler.setFormatter(new java.util.logging.Formatter() { @Override public String format(LogRecord logRecord) { if(logRecord.getLevel() == Level.INFO) { return "[INFO " + createDateTimeLog() + "] " + logRecord.getMessage() + "\r\n"; } else if(logRecord.getLevel() == Level.WARNING) { return "[WARN " + createDateTimeLog

问题 After searching for the answers to my questions Implementing logging in a Java application and Using the java.util.logging package in a Swing application about the java.util.logging package, I have tracked down the problem and want to share my solution here. I am posting this as a new question to (hopefully) give a concise statement of the actual problem (which is not entirely clear in my previous questions because I was asking the wrong question) as well as to give a (hopefully) clear answer

问题 We have a large existing app that has several HttpServlets. These are currently written using log4j logging - except a few of the libs that were written with Java.util.logging uses. I'd REALLY REALLY like to get them all going through the log4j handling and output formatting. It looks like I should be able to use slf4j to do this - but I can't find any actual documentation on HOW. Just lots of "yeah, it can things like that". I've added slf4j-api.jar, slf4j-log4j12.jar and jul-to=slf4j.jar to

问题 I am using java.util.logging.Logger for logging. Currently I am creating one log file for each class. Can someone please suggest how to create a log file for a package instead of each class. And how to set the levels for each of these. I am also not able to find how to change the levels for all the loggers at once. So, essentially I am asking three questions here. Sorry about that. 1. Creating log file one for each package. 2. Setting common log level for the logs. 3. Setting log levels for