具有Java属性的Log4j手动配置

Question

I'm trying to load log4j.properties( mylog4j.properties ) file manually in Spring web application. The file is located under /WEB-INF/ and I'm reading this file in SYPLogger class as seen below:

private static final String CONF_FILE_NAME = "mylog4j.properties";             
Properties props = new Properties();
props.load(new FileInputStream(CONF_FILE_NAME));
PropertyConfigurator.configure(props);

Although I tried different location, I couldn't read the file. When I gave full path of the configuration file, everything is ok. But the above code gives FileNotFoundException(The system cannot find the file specified). Please help. Thanks in advance.

Answer 1

Try with the next:

String path = Thread.currentThread()
                    .getContextClassLoader()
                    .getResource("/")
                    .toURI()
                    .resolve("../mylog4j.properties")
                    .getPath();
Properties props = new Properties();
props.load(new FileInputStream(path));
PropertyConfigurator.configure(props);

In another way, have you seen the class org.springframework.web.util.Log4jConfigListener . You can configure this listener in the web.xml file. eg:

<context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>/WEB-INF/mylog4j.properties</param-value>
</context-param>
<listener>
    <listener-class>
        org.springframework.web.util.Log4jConfigListener
    </listener-class>
</listener>