Where should I put the log4j.properties file?

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

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 2

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 static ServletContext context from another JSP file. Example:

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

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

Answer 3

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 4

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

Answer 5

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.