在IDEA中查找log4j.properties

Question

更新 - 这个问题是我自己做的.

在某个阶段,这个特定的测试类进行了测试,以确保记录某些内容.在设置中,我之前删除了所有appender并添加了我自己的appender来进行测试时断言.那个测试很久以后就消失了,但这个小块仍然存在于设置中:Logger.getRootLogger().removeAllAppenders();.

对不起,误报了.:)

---

在IDEA,我有以下测试:

@Test
public void shouldLog() {
    URL resource = Thread.currentThread().getContextClassLoader()
        .getResource("log4j.properties");
    System.out.println("resource = " + resource);
    final Logger logger = Logger.getLogger(getClass());
    logger.info("Hello world");
}

它如此输出:

"C:\Program Files\Java\jdk1.5.0_18\bin\java" -classpath "C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 11.1\lib\idea_rt.jar" -ea -Dfile.encoding=UTF-8 com.intellij.rt.execution.CommandLineWrapper C:\DOCUME~1\JMAWSO~1.NT3\LOCALS~1\Temp\classpath2294205410661538428.tmp @vm_params C:\DOCUME~1\JMAWSO~1.NT3\LOCALS~1\Temp\vm_params5645362020129462784.tmp com.intellij.rt.execution.application.AppMain com.intellij.rt.execution.junit.JUnitStarter -ideVersion5 au.com.gmm.repo.RepoThreadCleanupServiceTest,shouldLog
resource = file:/C:/user/jem/projects/GMM/out/test/cashflow/log4j.properties
log4j:WARN No appenders could be found for logger (au.com.gmm.repo.RepoThreadCleanupServiceTest).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Process finished with exit code 0

这是一个着名的问题,很多新手一遍又一遍地看到这个问题.今天我觉得有点傻了.

http://logging.apache.org/log4j/1.2/faq.html#noconfig说log4j uses Thread.getContextClassLoader().getResource() to locate the default configuration files.但是,我的测试检查 Thread.currentThread().getContextClassLoader().getResource("log4j.properties")并找到属性文件没有问题.

该文件的内容是:

log4j.rootLogger=DEBUG, CONSOLE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{HH:mm:ss.SSS} %c - %m%n

Answer 1

我在IntelliJ IDEA中使用log4j和slf4j,它对我来说非常适合.只需将这些jar包含在IntelliJ中的应用程序依赖项中:

log4j-1.2.9.jar
slf4j-api-1.5.11.jar
slf4j-log4j12-1.5.11.jar

比把你的应用程序放在log4j配置的某个地方.但是不要忘记将IntelliJ中log4j.properties的位置标记为Sources,或者如果您在测试中将其用作测试源:

log4j.properties:

log4j.rootLogger=INFO,stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d [%t] %-5p %X{file} %c{1} - %m%n

log4j.logger.your.app=DEBUG,yourApp
log4j.additivity.your.app=false
log4j.logger.yourApp=DEBUG,yourApp
log4j.additivity.yourApp=false
log4j.appender.yourApp=org.apache.log4j.ConsoleAppender
log4j.appender.yourApp.layout=org.apache.log4j.PatternLayout
log4j.appender.yourApp.layout.ConversionPattern=%d [%t] %-5p %X{file} %c{1} %m%n
log4j.appender.yourApp.ImmediateFlush=true

然后在你的java类中使用它来获取记录器:

private static final Logger LOGGER = LoggerFactory.getLogger(YourApp.class);

你不会看到任何警告:No appenders could be found for logger.

希望这可以帮助.