1.在servlet中上传图片,上传的文件夹是imge在webroot下,主要代码如下

private void saveImage(HttpServletRequest request, HttpServletResponse response) throws IOException  {               //保存的图片的名称              fileName =System.currentTimeMillis() + ".jpg";               //获得imge文件夹在tomcat中的决定路径，basePath的值是C:\Program Files\Apache Software Foundation\Apache Tomcat 6.0.20\webapps\flexTest\imge              String basePath = request.getSession().getServletContext().getRealPath("/imge/");              filePath = basePath;              System.out.println("保存图片的地址为："+filePath);              realFilePath = filePath+"\\"+fileName;              // 获得一个图片文件流，我这里是从flex中传过来的              BufferedImage bufferedImage = ImageIO.read(request.getInputStream());               if (bufferedImage != null) {                   //保存图片到指定的目录和文件中                 ImageIO.write(bufferedImage, "jpeg", new File(filePath , fileName));               }           }

2.当要把上面上传图片通过servlet展示到游览器上时，取的路径如下：

private void printImage(HttpServletRequest request, HttpServletResponse response) throws IOException  {             response.setContentType("text/html");          request.setCharacterEncoding("utf-8");          PrintWriter out = response.getWriter();          //获得服务器的地址，不能直接获取本机tomcat的绝对路径，不然游览器读取不了指定的图片文件          // basePath的值是http://localhost:8080/flexTest          String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+request.getContextPath()+"/";          String showFile = basePath+"/imge/"+this.fileName;          out.println("");          out.println("");          out.println("  ");          out.println("  ");          out.print("    This is ");          out.print(" ");          out.print("");          System.out.println("有显示图片的地址是"+showFile);         //showFile的值是    http://localhost:8080/flexTest//imge/1299470395060.jpg          out.println(", using the POST method");          out.println("  ");          out.println("");          out.flush();          out.close();