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;
  }
}