Java 如何发现加载的log4j2配置的完整路径？

我的应用服务器正在加载log4j2.properties文件，我找不到它在哪里。我想知道这个conf文件的完整路径

如果使用选项

-Dlog4j.debug

启动jvm（如中所述），我可以轻松地让log4j2显示搜索到的配置文件，但它不会显示完整的路径

通过调试参数，我得到以下输出：

[err] DEBUG StatusLogger Using configurationFactory org.apache.logging.log4j.core.config.ConfigurationFactory$Factory@239c2809
[err] TRACE StatusLogger Trying to find [log4j2-testago service.properties] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.properties] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.properties] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.properties] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-testago service.yml] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.yml] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.yml] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.yml] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-testago service.yaml] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.yaml] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.yaml] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.yaml] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-testago service.json] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.json] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.json] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.json] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-testago service.jsn] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.jsn] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.jsn] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.jsn] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-testago service.xml] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.xml] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.xml] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-testago service.xml] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-test.properties] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-test.properties] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.properties] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.properties] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-test.yml] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-test.yml] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.yml] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.yml] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-test.yaml] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-test.yaml] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.yaml] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.yaml] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-test.json] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-test.json] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.json] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.json] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-test.jsn] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.
[err] TRACE StatusLogger Trying to find [log4j2-test.jsn] using com.ibm.ws.classloading.internal.AppClassLoader@8bc0851 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.jsn] using com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414 class loader.
[err] TRACE StatusLogger Trying to find [log4j2-test.jsn] using ClassLoader.getSystemResource().
[err] TRACE StatusLogger Trying to find [log4j2-test.xml] using context class loader com.ibm.ws.classloading.internal.ThreadContextClassLoader@834b414.

---

由于最后显示的文件名是

log4j2 test.xml

，因此这是加载的文件。问题是，如果我将文件命名为

log4j2.xml

，则会在其前面加载另一个名为

log4j2.properties

的配置。我找不到这个文件在哪里！必须有一种方法来发现它从何处加载。

在您的程序中，您可以执行以下操作：

URL url = org.apache.logging.log4j.LogManager.class.getResource("/log4j2.properties");
System.out.println(url);

---

它应该使用

LogManager

类的类加载器在类路径的根目录下显示“log4j2.properties”文件的位置

在资源文件夹中添加log4j2.xml文件时，它将被类路径上的log4j2.properties替换。正确吗？运行测试时会发生此问题？请告诉我如果尝试会发生什么：

-Dlog4j.configurationFile=file:/path/to/file/log4j2.xml

@vladwoguer如果我将上面加载的文件从log4j2-test.xml重命名为log4j2.xml，则会加载log4j2.properties而不是我的文件。我刚刚选择了一个在.properties文件之前加载的文件名。是否检查了其中一个JAR是否包含log4j2.properties？