我应该把 log4j.properties 文件放在哪里？

Question

I wrote a web service project using netbeans 6.7.1 with glassfish v2.1, put log4j.properties to the root dir of project and use:

static Logger logger = Logger.getLogger(MyClass.class);

in Constructor:

PropertyConfigurator.configure("log4j.properties");

and in functions:

logger.info("...");
logger.error("...");
// ...

but, it is error info(actually, I have tried to put it almost every dir that I could realize):

log4j:ERROR Could not read configuration file [log4j.properties].
java.io.FileNotFoundException: log4j.properties (The system cannot find the file specified)
        at java.io.FileInputStream.open(Native Method)
        at java.io.FileInputStream.<init>(FileInputStream.java:106)
        at java.io.FileInputStream.<init>(FileInputStream.java:66)
        at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:297)
        at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:315)
        at com.corp.ors.demo.OrsDemo.main(OrisDemo.java:228)
log4j:ERROR Ignoring configuration file [log4j.properties].
log4j:WARN No appenders could be found for logger (com.corp.ors.demo.OrsDemo).
log4j:WARN Please initialize the log4j system properly.

the example project could be get from http://www.91files.com/?N3F0QGQPWMDGPBRN0QA8

Answer 1

I know it's a bit late to answer this question, and maybe you already found the solution, but I'm posting the solution I found (after I googled a lot) so it may help a little:

1. Put log4j.properties under WEB-INF\\classes of the project as mentioned previously in this thread.
2. Put log4j-xx.jar under WEB-INF\\lib
3. Test if log4j was loaded: add -Dlog4j.debug @ the end of your java options of tomcat

Hope this will help.

rgds

Answer 2

如前所述，log4j.properties 应该在类路径中包含的目录中，我想补充一点，在 mavenized 项目中，一个好地方可以是src/main/resources/log4j.properties

Answer 3

您可以使用 VM 参数 -Dlog4j.configuration="file:/C:/workspace3/local/log4j.properties" 指定配置文件位置

Answer 4

You have to put it in the root directory, that corresponds to your execution context.

Example:

    MyProject
       src
           MyClass.java
           log4j.properties

If you start executing from a different project, you need to have that file in the project used for starting the execution. For example, if a different project holds some JUnit tests, it needs to have also its log4j.properties file.

---

I suggest using log4j.xml instead of the log4j.properties. You have more options, get assistance from your IDE and so on...

Answer 5

For a Maven Based Project keep your log4j.properties in src/main/resources. Nothing else to do!

Answer 6

If you put log4j.properties inside src, you don't need to use the statement -

PropertyConfigurator.configure("log4j.properties");

It will be taken automatically as the properties file is in the classpath.

Answer 7

尝试：

PropertyConfigurator.configure(getClass().getResource("/controlador/log4j.properties"));

Answer 8

The file should be located in the WEB-INF/classes directory. This directory structure should be packaged within the war file.

Answer 9

My IDE is NetBeans. I put log4j.property file as shown in the pictures

Root

Web

WEB-INF

To use this property file you should to write this code:

package example;

import java.io.File;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.Logger;
import javax.servlet.*;
public class test {

public static ServletContext context;
static Logger log = Logger.getLogger("example/test");

public test() {

        String homeDir = context.getRealPath("/");
        File propertiesFile = new File(homeDir, "WEB-INF/log4j.properties");
        PropertyConfigurator.configure(propertiesFile.toString());
        log.info("This is a test");
    }
}

You can define from another JSP file. Example:

test.context = getServletContext(); 
test sample = new test(); 

Now you can use log4j.property file in your projects.

Answer 10

A few technically correct specific answers already provided but in general, it can be anywhere on the runtime classpath, ie wherever classes are sought by the JVM.

This could be the /src dir in Eclipse or the WEB-INF/classes directory in your deployed app, but it's best to be aware of the classpath concept and why the file is placed in it, don't just treat WEB-INF/classes as a "magic" directory.

Answer 11

I've spent a great deal of time to figure out why the file is not seen.
Then I noticed it was visible for the project only when it was in both and folders.
Hope it'll be useful to somebody.
PS: The project was maven-based.

Answer 12

I found that Glassfish by default is looking at [Glassfish install location]\\glassfish\\domains[your domain]\\ as the default working directory... you can drop the log4j.properties file in this location and initialize it in your code using PropertyConfigurator as previously mentioned...

Properties props = System.getProperties();
System.out.println("Current working directory is " + props.getProperty("user.dir"));
PropertyConfigurator.configure("log4j.properties");

Answer 13

Your standard project setup will have a project structure something like:

src/main/java
src/main/resources

You place log4j.properties inside the resources folder, you can create the resources folder if one does not exist

Answer 14

Put log4j.properties in classpath. Here is the 2 cases that will help you to identify the proper location- 1. For web application the classpath is /WEB-INF/classes.

\WEB-INF      
    classes\
        log4j.properties

2. To test from main / unit test the classpath is source directory

   \\Project\\ src\\ log4j.properties

Answer 15

There are many ways to do it:

Way1: If you are trying in maven project without Using PropertyConfigurator

First: check for resources directory at scr/main

  if available,
       then: create a .properties file and add all configuration details.
  else
       then: create a directory named resources and a file with .properties     
write your configuration code/details.

follows the screenshot:

Way2: If you are trying with Properties file for java/maven project Use PropertyConfigurator

Place properties file anywhere in project and give the correct path. say: src/javaLog4jProperties/log4j.properties

static{

 PropertyConfigurator.configure("src/javaLog4jProperties/log4j.properties");

}

Way3: If you are trying with xml on java/maven project Use DOMConfigurator

Place properties file anywhere in project and give correct path. say: src/javaLog4jProperties/log4j.xml

static{

 DOMConfigurator.configure("src/javaLog4jProperties/log4j.xml");

}

Answer 16

I don't know this is correct way.But it solved my problem. put log4j.properties file in "project folder"/config and use PropertyConfigurator.configure("config//log4j.properties");

it will works with IDE but not when run the jar file yourself. when you run the jar file by yourself just copy the log4j.properties file in to the folder that jar file is in.when the jar and property file in same directory it runs well.

Answer 17

Actually, I've just experienced this problem in a stardard Java project structure as follows:

\myproject
    \src
    \libs
    \res\log4j.properties

In Eclipse I need to add the res folder to build path, however, in Intellij, I need to mark the res folder as resouces as the linked screenshot shows: right click on the res folder and mark as resources .

Answer 18

You don't need to specify PropertyConfigurator.configure("log4j.properties"); in your Log4J class, If you have already defined the log4j.properties in your project structure.

In case of Web Dynamic Project: -

You need to save your log4j.properties under WebContent -> WEB-INF -> log4j.properties

I hope this may help you.

Answer 19

Open spark-shell

Then type System.getenv("SPARK_CONF_DIR")

That will print where your log4j.properties should go.

Answer 20

For me it worked when I put the file inside the resources folder. Also it was a war file my project, my recommendation is to ensure that the name of the file is log4j.properties, my project didn't recognized "log4j2.properties"

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