简单的bean利用spring得到服务器上的路径

利用spring中的ServletContextAware 接口获得ServletContext，从而获得服务器上下文路径
程序片段：

package com.ahtec.oa.service.impl;

import java.io.File;
import java.io.IOException;

import javax.servlet.ServletContext;

import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.ServletContextAware;

/**
 * @author Wu
 */
@Component
public class AutoRunServiceImpl implements ServletContextAware {

 protected final Logger logger = LoggerFactory.getLogger(this.getClass());

 private ServletContext servletContext;

 public void setServletContext(ServletContext servletContext) {
  this.servletContext = servletContext;
 }

 public void deletePdcaZipFile() {
  logger.debug("start deletePdcaZipFile ...");
  String pdcaDeleteFileLocation = "";
  try {
   String fileLocation = "files\\pdca\\";
   String ctxDir = this.servletContext.getRealPath(String.valueOf(File.separatorChar));
   if (!ctxDir.endsWith(String.valueOf(File.separatorChar))) {
    ctxDir = ctxDir + File.separatorChar;
   }
   pdcaDeleteFileLocation = ctxDir + fileLocation;
   FileUtils.deleteDirectory(new File(pdcaDeleteFileLocation));
   logger.debug("has deleted : '{}' all files!", pdcaDeleteFileLocation);
   logger.debug("end deletePdcaZipFile...");
  } catch (IOException e) {
   logger.debug("do not find pdcaDeleteFileLocation: {}", pdcaDeleteFileLocation);
  }
  logger.debug("============================================================");
 }

}