Java实现的上传并压缩图片功能【可等比例压缩或原尺寸压缩】

package codeGenerate.util;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileNotFoundException;import java.io.IOException;import javax.imageio.ImageIO;public class ImageZipUtil {  public static void main(String[] args) {    zipWidthHeightImageFile(new File("C://spider//3.png"),new File("C://spider//3-1.jpg"),425,638,0.7f);    //zipImageFile(new File("C://spider//2.JPG"),new File("C://spider//2-2.JPG"),425,638,0.7f);    //zipImageFile(new File("C://spider//3.jpg"),new File("C://spider//3-3.jpg"),425,638,0.7f);    System.out.println("ok");  }  /**   * 根据设置的宽高等比例压缩图片文件<br> 先保存原文件，再压缩、上传   * @param oldFile 要进行压缩的文件   * @param newFile 新文件   * @param width 宽度 //设置宽度时（高度传入0，等比例缩放）   * @param height 高度 //设置高度时（宽度传入0，等比例缩放）   * @param quality 质量   * @return 返回压缩后的文件的全路径   */  public static String zipImageFile(File oldFile,File newFile, int width, int height,float quality) {    if (oldFile == null) {      return null;    }    try {      /** 对服务器上的临时文件进行处理 */      Image srcFile = ImageIO.read(oldFile);      int w = srcFile.getWidth(null);      int h = srcFile.getHeight(null);      double bili;      if(width>0){        bili=width/(double)w;        height = (int) (h*bili);      }else{        if(height>0){          bili=height/(double)h;          width = (int) (w*bili);        }      }      String srcImgPath = newFile.getAbsoluteFile().toString();      System.out.println(srcImgPath);      String subfix = "jpg";      subfix = srcImgPath.substring(srcImgPath.lastIndexOf(".")+1,srcImgPath.length());      BufferedImage buffImg = null;      if(subfix.equals("png")){        buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);      }else{        buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);      }      Graphics2D graphics = buffImg.createGraphics();      graphics.setBackground(new Color(255,255,255));      graphics.setColor(new Color(255,255,255));      graphics.fillRect(0, 0, width, height);      graphics.drawImage(srcFile.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null);      ImageIO.write(buffImg, subfix, new File(srcImgPath));    } catch (FileNotFoundException e) {      e.printStackTrace();    } catch (IOException e) {      e.printStackTrace();    }    return newFile.getAbsolutePath();  }  /**   * 按设置的宽度高度压缩图片文件<br> 先保存原文件，再压缩、上传   * @param oldFile 要进行压缩的文件全路径   * @param newFile 新文件   * @param width 宽度   * @param height 高度   * @param quality 质量   * @return 返回压缩后的文件的全路径   */  public static String zipWidthHeightImageFile(File oldFile,File newFile, int width, int height,float quality) {    if (oldFile == null) {      return null;    }    String newImage = null;    try {      /** 对服务器上的临时文件进行处理 */      Image srcFile = ImageIO.read(oldFile);      String srcImgPath = newFile.getAbsoluteFile().toString();      System.out.println(srcImgPath);      String subfix = "jpg";      subfix = srcImgPath.substring(srcImgPath.lastIndexOf(".")+1,srcImgPath.length());      BufferedImage buffImg = null;      if(subfix.equals("png")){        buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);      }else{        buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);      }      Graphics2D graphics = buffImg.createGraphics();      graphics.setBackground(new Color(255,255,255));      graphics.setColor(new Color(255,255,255));      graphics.fillRect(0, 0, width, height);      graphics.drawImage(srcFile.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null);      ImageIO.write(buffImg, subfix, new File(srcImgPath));    } catch (FileNotFoundException e) {      e.printStackTrace();    } catch (IOException e) {      e.printStackTrace();    }    return newImage;  }}