Get Absolute File Path Using ServletFilter

It’s all begin when i need to get a text file content from a servlet filter, after spent some amount of time googling i’ve found a good solution. This is how i do it.

package com.edw.filter;

import java.io.File;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.apache.log4j.Logger;

/**
 *
 * @author edw
 */
public class MyFilter implements Filter {

    private FilterConfig filterConfig = null;
    private Logger logger = Logger.getLogger(this.getClass());

    public MyFilter() {
        
    }    

    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain chain)
	throws IOException, ServletException {
	
	try {
		String pathName = filterConfig.getServletContext().getRealPath("/");
		File file = new File(pathName);

		logger.debug(file.getAbsolutePath());

		chain.doFilter(request, response);
	}
	catch(Throwable t) {
	    logger.error(t,t);
	}
    }    

    public void destroy() { 
    }

    public void init(FilterConfig filterConfig) { 
		this.filterConfig = filterConfig;
    }    

}

Hope it can help others, thank you (*)

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