图片压缩、编辑、剪切

图片压缩、编辑、剪切。什么都不说了，直接上代码：
“` python
package com.smartdoer.utils;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.multipart.MultipartFile;

public class ImgEditor {

/** 
   * 改变图片尺寸 
   * @param srcFileName 源图片路径 
   * @param tagFileName 目的图片路径 
   * @param width 修改后的宽度 
   * @param height 修改后的高度 
   */
  public void zoomImage(String srcFileName,String tagFileName,int width,int height){  
     try { 
     BufferedImage bi = ImageIO.read(new File(srcFileName)); 
     BufferedImage tag=new BufferedImage(width,height, BufferedImage.TYPE_INT_RGB); 
     tag.getGraphics().drawImage(bi, 0, 0, width, height, null); 
     ImageIO.write(tag, "jpg", new File(tagFileName));//画图 
     } catch (IOException e) { 
     e.printStackTrace(); 
     } 
  } 



  /** 
   * 缩放图像（按高度和宽度缩放） 
   * @param srcImageFile 源图像文件地址 
   * @param result 缩放后的图像地址 
   * @param height 缩放后的高度 
   * @param width 缩放后的宽度 
   * @param bb 比例不对时是否需要补白：true为补白; false为不补白; 
   */
  public void scale(String srcImageFile, String result, int height, int width, boolean bb) { 
    try { 
      double ratio = 0.0; // 缩放比例 
      File f = new File(srcImageFile); 
      BufferedImage bi = ImageIO.read(f); 
      Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH); 
      // 计算比例 
      if ((bi.getHeight() > height) || (bi.getWidth() > width)) { 
        if (bi.getHeight() > bi.getWidth()) { 
          ratio = (new Integer(height)).doubleValue() 
              / bi.getHeight(); 
        } else { 
          ratio = (new Integer(width)).doubleValue() / bi.getWidth(); 
        } 
        AffineTransformOp op = new AffineTransformOp(AffineTransform 
            .getScaleInstance(ratio, ratio), null); 
        itemp = op.filter(bi, null); 
      } 
      if (bb) {//补白 
        BufferedImage image = new BufferedImage(width, height, 
            BufferedImage.TYPE_INT_RGB); 
        Graphics2D g = image.createGraphics(); 
        g.setColor(Color.white); 
        g.fillRect(0, 0, width, height); 
        if (width == itemp.getWidth(null)) 
          g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, 
              itemp.getWidth(null), itemp.getHeight(null), 
              Color.white, null); 
        else
          g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, 
              itemp.getWidth(null), itemp.getHeight(null), 
              Color.white, null); 
        g.dispose(); 
        itemp = image; 
      } 
      ImageIO.write((BufferedImage) itemp, "JPEG", new File(result)); 
    } catch (IOException e) { 
      e.printStackTrace(); 
    } 
  } 


  /** 
   * 图像切割(按指定起点坐标和宽高切割) 
   * @param srcImageFile 源图像地址 
   * @param result 切片后的图像地址 
   * @param x 目标切片起点坐标X 
   * @param y 目标切片起点坐标Y 
   * @param width 目标切片宽度 
   * @param height 目标切片高度 
   */
  public void cut(String srcImageFile, String result, 
      int x, int y, int width, int height) { 
    try { 
      // 读取源图像 
      BufferedImage bi = ImageIO.read(new File(srcImageFile)); 
      int srcWidth = bi.getHeight(); // 源图宽度 
      int srcHeight = bi.getWidth(); // 源图高度 
      if (srcWidth > 0 && srcHeight > 0) { 
        Image image = bi.getScaledInstance(srcWidth, srcHeight, 
            Image.SCALE_DEFAULT); 
        // 四个参数分别为图像起点坐标和宽高 
        // 即: CropImageFilter(int x,int y,int width,int height) 
        ImageFilter cropFilter = new CropImageFilter(x, y, width, height); 
        Image img = Toolkit.getDefaultToolkit().createImage( 
            new FilteredImageSource(image.getSource(), 
                cropFilter)); 
        BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); 
        Graphics g = tag.getGraphics(); 
        g.drawImage(img, 0, 0, width, height, null); // 绘制切割后的图 
        g.dispose(); 
        // 输出为文件 
        ImageIO.write(tag, "JPEG", new File(result)); 
      } 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
  } 
  /**
     * 图片裁剪
     * @param srcImageFile 图片裁剪地址
     * @param result 图片输出文件夹
     * @param destWidth 图片裁剪宽度
     * @param destHeight 图片裁剪高度
     */
    @SuppressWarnings("rawtypes")
    public void cutImage(String srcImageFile, String result,
           int x,int y, int destWidth, int destHeight) {
        try {
            Iterator iterator = ImageIO.getImageReadersByFormatName("JPEG");/*PNG,BMP*/   
            ImageReader reader = (ImageReader)iterator.next();/*获取图片尺寸*/
            InputStream inputStream = new FileInputStream(srcImageFile);  
            ImageInputStream iis = ImageIO.createImageInputStream(inputStream);   
            reader.setInput(iis, true);   
            ImageReadParam param = reader.getDefaultReadParam();   
            Rectangle rectangle = new Rectangle(x,y, destWidth, destHeight);/*指定截取范围*/    
            param.setSourceRegion(rectangle);   
            BufferedImage bi = reader.read(0,param); 
            ImageIO.write(bi, "JPEG", new File(result));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
  //获得文件名字 
  public String getFileName(MultipartFile file, HttpServletRequest request,HttpSession session){ 
    String FILE_PATH = session.getServletContext().getRealPath("/") + "upload"; 
    String fileName = file.getOriginalFilename();  
    String[] suffixNameArr = fileName.split("\."); 
    String suffixName = suffixNameArr[suffixNameArr.length-1]; 
    String userName = SecurityContextHolder.getContext().getAuthentication().getName(); 

    return getTime() + userName+"."+suffixName; 
  } 
  //文件上传,返回文件路径 
  public String uploadFile(MultipartFile file, HttpServletRequest request,HttpSession session) throws IOException { 
    String FILE_PATH = session.getServletContext().getRealPath("/") + "upload"; 
    String fileName = getFileName(file,request,session); 
    File tempFile = new File(FILE_PATH, fileName);  

    if (!tempFile.getParentFile().exists()) {  
      tempFile.getParentFile().mkdir();  
    }  
    if (!tempFile.exists()) {  
      tempFile.createNewFile();  
    }  
    file.transferTo(tempFile); //将上传文件写到服务器上指定的文件。 

    return FILE_PATH + "\" + tempFile.getName();  
  }  

  /* public static File getFile(String fileName) {  
    return new File(FILE_PATH, fileName);  
  } */ 

  public String getTime(){ 
    Date date = new Date(); 
    SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");//设置日期格式 
    String nowTime = df.format(date).toString(); 
    return nowTime; 
  } 

  public static void main(String[] args){
      ImgEditor id = new ImgEditor();
      id.cut("E:\photo\IMG_20161223_722039.jpg", "E:\photo\cated.jpg",0,0, 266, 266);
  }

}