解决logback的日志文件路径问题

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;
import ch.qos.logback.core.util.StatusPrinter;
import java.io.File;
public class LogTest
{
 private org.slf4j.Logger logger;
 private ch.qos.logback.classic.LoggerContext loggerContext;
 public LogTest()
 {
  logger = org.slf4j.LoggerFactory.getLogger(this.class);
  loggerContext = (LoggerContext) org.slf4j.LoggerFactory.getILoggerFactory();
  String logbackConfigPath = System.getProperty("user.dir") + "/your_logback_config/logback.xml";
  File file = new File(logbackConfigPath);
  if(!file.exists())
  {
  logger.error("logbackConfigPath file is no exist");
  }
  else 
  {
  if(!file.isFile())
  {
  logger.error("logbackConfigPath file is not a file");
  }
  else
  {
  if(!file.canRead())
  {
  logger.error("logbackConfigPath file can not read");
  }
  else
  {
  JoranConfigurator joranConfigurator = new JoranConfigurator();
    joranConfigurator.setContext(loggerContext);
    loggerContext.reset();
    try {
     joranConfigurator.doConfigure(file);
    } catch (Exception e) {
    logger.error("logbackConfigPath Load logback config file error. Message: {}",e.getMessage());
    }
    StatusPrinter.printInCaseOfErrorsOrWarnings(loggerContext);
  }
  }
  }
 }
}