How to configure log4j in a Spring Mvc application configured with Java Annotations and using a log4

[Jhon Parker]

I'm working on a `Spring MVC 4.2.5.RELEASE` web application, I'm using `Netbeans` IDE with `GlassFishSErver 4.1`, I want to use `log4j 1.2.17` so I created a log4j.properties file but it seems like my properties file it's not being found because I get the following error:

log4j:WARN No appenders could be found for logger (org.springframework.web.servlet.DispatcherServlet). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

I configured my Spring application using java annotations here is my configuration

    @Configuration
    @EnableWebMvc
    @ComponentScan({"config", "controllers"})
    public class ConfigMVC extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/WEB-INF/resources/");
    }

    @Bean
    public UrlBasedViewResolver setupViewResolver() {
        UrlBasedViewResolver resolver = new UrlBasedViewResolver();
        resolver.setPrefix("/WEB-INF/jsp/");
        resolver.setSuffix(".jsp");
        resolver.setViewClass(JstlView.class);
        return resolver;
    }

}

here is my WebInitializer

    public class WebInicializar implements WebApplicationInitializer {
    
        @Override
        public void onStartup(ServletContext servletContext) throws ServletException {
            AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
            ctx.register(ConfigMVC.class);
            ctx.setServletContext(servletContext);
            Dynamic servlet = servletContext.addServlet("dispatcher", new DispatcherServlet(ctx));
            servlet.addMapping("/");
            servlet.setLoadOnStartup(1);
            servlet.setInitParameter("throwExceptionIfNoHandlerFound", "true");
        }
    }

and here is my controller

    @Controller
    public class HomeController {
    
        private static final Logger logger = Logger.getLogger(HomeController.class);
      
        @RequestMapping(value = "/myPage", method = RequestMethod.GET)
        public String paginaSinMap(ModelMap map) {
    
        logger.info("This is an info log entry");
        logger.error("This is an error log entry");
    
        return "myPage";
    }

and here it's my `log4j.properties`

# LOG4J configuration log4j.rootLogger=INFO, Appender1, Appender2 log4j.appender.Appender1=org.apache.log4j.ConsoleAppender log4j.appender.Appender1.layout=org.apache.log4j.PatternLayout log4j.appender.Appender1.layout.ConversionPattern=%-7p %d [%t] %c %x - %m%n log4j.appender.Appender2=org.apache.log4j.FileAppender log4j.appender.Appender2.File=D:/Logs/SpringMVC.log log4j.appender.Appender2.layout=org.apache.log4j.PatternLayout log4j.appender.Appender2.layout.ConversionPattern=%-7p %d [%t] %c %x - %m%n

and I put this log4j.properties in my resources folder, here is my project structure

MyWebAppProjectName --Web Pages --WEB-INF --jsp index.jsp --resources --js js.js --css site.css log4j.properties --Source Packages --config ConfigMVC.java WebInitializaer.java --controllers HomeController.java

[Tim Holloway]

Log4j properties are expected to be located in the application classpath. For web applications, that would be /WEB-INF/classes/log4j.properties or /WEB-INF/classes/log4j.xml

Any other log4 configuration would have to be done in application logic.

[Jhon Parker]

Tim Holloway wrote:Log4j properties are expected to be located in the application classpath. For web applications, that would be /WEB-INF/classes/log4j.properties or /WEB-INF/classes/log4j.xml

Any other log4 configuration would have to be done in application logic.

but I don't have those folders do I need to create that classes folder inside my WEB inf??

Also I forgot to mention that it's a maven web aplication this is my project structure

MyWebAppProjectName
--Web Pages
--WEB-INF
--jsp
index.jsp
--resources
--js
js.js
--css
site.css
log4j.properties
--Source Packages
--config
ConfigMVC.java
WebInitializaer.java
--controllers
HomeController.java
--Test Packages
--Other Resources
--src/main/resources
--default package
--log4j.properties
--Dependencies
--Java Dependencies
--Project FIles


So I put the log4j.properties in the Other Resources/src/main/resources and when I did this Netbeans created a default Package with the file inside like this default package/log4j-properties and it worked the logs starting to appear in the output and everything worked fine as expected.

I tried to create a package named Log4jResource inside this path src/main/resources but when I did this it stopped to work and the error showed again, so it's there a way to put this file in that folder but without having to use default package that NetBeans creates when I put the folder in there.

I tried doing refactor rename the default package but it shows me this error Module JPA Refactoring threw java.lang.NullPointerException. Please report a bug against JPA Refactoring module and attach your var/log/messages.log.

It would be better if I create that classes folder inside my WEB-INF??

[Tim Holloway]

Forget about NetBeans. If maven can create it, then NetBeans should be able to create it.

To ensure that the WEB-INF/classes/log4j.properties file build into its proper home in the target WAR, create a directory /src/main/resources/WEB-INF/classes in your Maven project directory and put the source log4j.property file there. Maven will automatically copy it.