一个用于图片上传的工具类(原)

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package com.util;   import java.awt.Image; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileOutputStream; import java.util.ArrayList; import java.util.Date; import java.util.List;   import javax.imageio.ImageIO; import javax.servlet.http.HttpServletRequest;   import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; import com.sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGImageEncoder;   /*******************************************************************************  * 缩略图类（通用） 本java类能将jpg、bmp、png、gif图片文件，进行等比或非等比的大小转换。 具体使用方法  * compressPic(大图片路径,生成小图片路径,大图片文件名,生成小图片文名,生成小图片宽度,生成小图片高度,是否等比缩放(默认为true))  */ public class CompressPic {     public String addImages(HttpServletRequest request,String Urlpath,String InputfileName) {         String realFileName = "";         // 转型为MultipartHttpRequest(重点的所在)         MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;         // 获得第1张图片（根据前台的name名称得到上传的文件）         MultipartFile imgFile1 = multipartRequest.getFile(InputfileName);         // 定义一个数组，用于保存可上传的文件类型         List<String> fileTypes = new ArrayList<String>();         fileTypes.add("jpg");         fileTypes.add("jpeg");         fileTypes.add("bmp");         fileTypes.add("png");         if (!(imgFile1.getOriginalFilename() == null || "".equals(imgFile1.getOriginalFilename()))) {             String fileName = imgFile1.getOriginalFilename();             // 获取上传文件类型的扩展名,先得到.的位置，再截取从.的下一个位置到文件的最后，最后得到扩展名             String ext = fileName.substring(fileName.lastIndexOf(".") + 1,fileName.length());             // 对扩展名进行小写转换             ext = ext.toLowerCase();             if (fileTypes.contains(ext)) {// 如果扩展名属于允许上传的类型，则创建文件                 try {                     realFileName = String.valueOf(new Date().getTime()) + "."+ ext;                     String path = request.getSession().getServletContext().getRealPath("/");                     File f = new File(path + Urlpath + realFileName);                     System.out.println("filePath="+path + Urlpath + realFileName);                     imgFile1.transferTo(f);                     Image img = ImageIO.read(f);                     // 判断图片格式是否正确                     if (img.getWidth(null) == -1)                         return "no";                     else {                         BufferedImage tag = new BufferedImage(129, 100,BufferedImage.TYPE_INT_RGB);                         tag.getGraphics().drawImage(img.getScaledInstance(129, 100,Image.SCALE_SMOOTH), 0, 0, null);                         FileOutputStream out = new FileOutputStream(path + Urlpath + realFileName); //                      FileOutputStream out2 = new FileOutputStream("D:\\WorkSpace\\onlinefdc\\WebRoot\\"+Urlpath+realFileName);                         // JPEGImageEncoder可适用于其他图片类型的转换                         JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); //                      JPEGImageEncoder encoder2 = JPEGCodec.createJPEGEncoder(out2);                         encoder.encode(tag); //                      encoder2.encode(tag);                         out.close(); //                      out2.close();                     } //                  f.delete();                     System.out.println("f.exists="+f.exists());                 } catch (Exception e) {                     e.printStackTrace();                 }             }         }         return realFileName;     } }