java图片处理，裁剪，合图，等比例缩放

 

java图片处理，裁剪，合图，等比例缩放

现在 外面核心，图片文章比较少，看了拷贝代码，而用不了，用相应jar包处理，很多等比例缩放，

达不到 想要的给予的期望:本工具类，是之前做微信打印机写的 基于Java自带的类，基于rgb。

package com.zjpz.util;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.WritableRaster;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**  * 微信图片处理工具  *  * @author zhuang.y  *  */ public class PictureTool {

   protected static Logger logger = LoggerFactory.getLogger(PictureTool.class);

   public static void main(String[] args) throws IOException {
  File fileOne = new File("c:\\1.jpg");
      BufferedImage imageFirst = ImageIO.read(fileOne);

      int border = 0;

      imageFirst =crop(imageFirst,0,10,297,300);
      File outFile = new File("d:\\2.jpg");
      ImageIO.write(imageFirst, "jpg", outFile);// 写图片       }

   /**  * 纵向合图的x坐标像素  */  private final static int y_width = 645;

   /**  * 标准图片的y坐标像素,920，是一般照片，1099是邮票照片  */  private final static int y_height = 920;

   /**  * 裁剪x坐标缩进像素  */  private final static int x_retract = 50;

   /**  * 裁剪y坐标缩进像素  */  private final static int y_retract = 50;

   /**  * 系统默认图片边框为20  */  public final static int BORDER = 20;

   /**  * 横向合成图片  */  public static void xPic(String first, String second, String out) {
      try {
         /* 1 读取第一张图片 */  File fileOne = new File(first);
         BufferedImage imageFirst = ImageIO.read(fileOne);
         int width = imageFirst.getWidth();// 图片宽度  int height = imageFirst.getHeight();// 图片高度  int[] imageArrayFirst = new int[width * height];// 从图片中读取RGB  imageArrayFirst = imageFirst.getRGB(0, 0, width, height, imageArrayFirst, 0, width);

         /* 1 对第二张图片做相同的处理 */  File fileTwo = new File(second);
         BufferedImage imageSecond = ImageIO.read(fileTwo);
         int widthTwo = imageSecond.getWidth();// 图片宽度  int heightTwo = imageSecond.getHeight();// 图片高度  int[] imageArraySecond = new int[widthTwo * heightTwo];
         imageArraySecond = imageSecond.getRGB(0, 0, widthTwo, heightTwo, imageArraySecond, 0, widthTwo);

         int h = height;
         if (height < heightTwo) {
            h = heightTwo;
         }

         // 生成新图片  BufferedImage imageResult = new BufferedImage(width + widthTwo, h, BufferedImage.TYPE_INT_RGB);
         imageResult.setRGB(0, 0, width, height, imageArrayFirst, 0, width);// 设置左半部分的RGB  imageResult.setRGB(width, 0, widthTwo, heightTwo, imageArraySecond, 0, widthTwo);// 设置右半部分的RGB  File outFile = new File(out);
         ImageIO.write(imageResult, "jpg", outFile);// 写图片  } catch (Exception e) {
         logger.error("横向合成图片出错....", e);
      }
   }

   /**  * 纵向合成图片  *  * @param first  * 放上面的图片路径  * @param second  * 放下面的图片路径  * @param out  * 文件输出目录  * @param border  * 图片预留边框  */  public static boolean yPic(String first, String second, String out, int border) {
      boolean isOk = true;
      try {
         /* 1 读取第一张图片 */   File fileOne = new File(first);
         BufferedImage imageFirst = ImageIO.read(fileOne);
         int width = imageFirst.getWidth();// 图片宽度  int height = imageFirst.getHeight();// 图片高度   /* 2对第二张图片做相同的处理 */   File fileTwo = new File(second);
         
         BufferedImage imageSecond = ImageIO.read(fileTwo);
         int widthTwo = imageSecond.getWidth();// 图片宽度  int heightTwo = imageSecond.getHeight();// 图片高度  /* 1 读取第一张图片begin */  int t_height = y_height - heightTwo;
         // 图片是横图，逆时针旋转90度再等比缩放  if (width > height) {
            imageFirst = rotateImageLeft90(imageFirst);
         }

         // 等比缩放  imageFirst = resize(imageFirst, y_width, t_height);

         // 缩放后图片的大小  width = imageFirst.getWidth();// 图片宽度  height = imageFirst.getHeight();// 图片高度  // 等比缩放后，图片还是太大，裁剪图片  boolean a_w, a_h = false;
         if ((a_w = (width > y_width)) || (a_h = (height > t_height))) {
            // 起始位置x,y坐标  int s_w = 0, s_h = 0;
            // 裁剪x坐标时，缩进属性x_retract  if (a_w) {
               int temp = width - y_width;
               if (temp > x_retract) {
                  temp = x_retract;
               } else {
                  temp = 0;
               }
               s_w = s_w + temp;
            }
            // 裁剪y坐标时，缩进属性y_retract  if (a_h) {
               int temp = height - t_height;
               if (temp > y_retract) {
                  temp = y_retract;
               } else {
                  temp = 0;
               }
               s_h = s_h + temp;
            }
            imageFirst = crop(imageFirst, s_w, s_h, y_width, t_height);
            width = imageFirst.getWidth();
            height = imageFirst.getHeight();
         }

         int[] imageArrayFirst = new int[(width - border) * height];// 从图片中读取RGB  imageArrayFirst = imageFirst.getRGB(border, 0, (width - border), height, imageArrayFirst, 0,
               (width - border));

         /* 2对第二张图片做相同的处理begin */  int[] imageArraySecond = new int[widthTwo * heightTwo];
         imageArraySecond = imageSecond.getRGB(0, 0, widthTwo, heightTwo, imageArraySecond, 0, widthTwo);

         int w = width;
         if (width < widthTwo) {
            w = widthTwo;
         }
         // 图片高度  int h = height + heightTwo;
         // 生成新图片  BufferedImage imageResult = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

         // 解决黑色背景,默认的TYPE_INT_RGB都是0，都是黑色的  Graphics2D g = (Graphics2D) imageResult.createGraphics();
         g.setColor(Color.WHITE);
         g.fillRect(0, 0, w, h);// 填充整个屏幕  g.dispose();

         // 留边框  imageResult.setRGB(border, 0, (width - border * 2), height, imageArrayFirst, 0, (width - border));// 设置左半部分的RGB  imageResult.setRGB(0, height, widthTwo, heightTwo, imageArraySecond, 0, widthTwo);// 设置右半部分的RGB   File outFile = new File(out);
         ImageIO.write(imageResult, "jpg", outFile);// 写图片  } catch (Exception e) {
         logger.error("纵向合成图片失败....", e);
         isOk = false;
      }
      return isOk;
   }

   /**  * 全图打印，图片缩放、旋转处理  *  * @param source  * 待处理的图片  * @param out  * 处理后文件输出目录  * @param border  * 图片预留边框  */  public static boolean maigaoPic(String source, String out, int border) {
      boolean isOk = true;
      try {
         /* 1 读取第一张图片 */   File fileOne = new File(source);
         BufferedImage imageFirst = ImageIO.read(fileOne);
         int width = imageFirst.getWidth();// 图片宽度  int height = imageFirst.getHeight();// 图片高度   // 图片是横图，逆时针旋转90度再等比缩放  if (width > height) {
            imageFirst = rotateImageLeft90(imageFirst);
         }

         // 等比缩放  imageFirst = resize(imageFirst, y_width, y_height);

         // 缩放后图片的大小  width = imageFirst.getWidth();// 图片宽度  height = imageFirst.getHeight();// 图片高度  // 等比缩放后，图片还是太大，裁剪图片  boolean a_w, a_h = false;
         if ((a_w = (width > y_width)) || (a_h = (height > y_height))) {
            // 起始位置x,y坐标  int s_w = 0, s_h = 0;
            // 裁剪x坐标时，缩进属性x_retract  if (a_w) {
               int temp = width - y_width;
               if (temp > x_retract) {
                  temp = x_retract;
               } else {
                  temp = 0;
               }
               s_w = s_w + temp;
            }
            // 裁剪y坐标时，缩进属性y_retract  if (a_h) {
               int temp = height - y_height;
               if (temp > y_retract) {
                  temp = y_retract;
               } else {
                  temp = 0;
               }
               s_h = s_h + temp;
            }
            imageFirst = crop(imageFirst, s_w, s_h, y_width, y_height);
            width = imageFirst.getWidth();
            height = imageFirst.getHeight();
         }

         int[] imageArrayFirst = new int[(width - border) * height];// 从图片中读取RGB  imageArrayFirst = imageFirst.getRGB(border, 0, (width - border), height, imageArrayFirst, 0,
               (width - border));

         // 生成新图片  BufferedImage imageResult = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

         // 解决黑色背景,默认的TYPE_INT_RGB都是0，都是黑色的  Graphics2D g = (Graphics2D) imageResult.createGraphics();
         g.setColor(Color.WHITE);
         g.fillRect(0, 0, width, height);// 填充整个屏幕  g.dispose();

         // 留边框  imageResult.setRGB(border, 0, (width - border * 2), height, imageArrayFirst, 0, (width - border));// 设置左半部分的RGB   File outFile = new File(out);
         ImageIO.write(imageResult, "jpg", outFile);// 写图片  } catch (IOException e) {
         logger.error("全图打印，图片缩放、旋转处理失败....", e);
         isOk = false;
      }
      return isOk;
   }

   /**  * 实现图像的等比缩放  *  * @param source  * 待处理的图片流  * @param targetW  * 宽度  * @param targetH  * 高度  * @return  */  public static BufferedImage resize(BufferedImage source, int targetW, int targetH) {
      int width = source.getWidth();// 图片宽度  int height = source.getHeight();// 图片高度  return zoomInImage(source, targetW, targetH);
      // 图片宽高都太小时，强制放大图片  /*  if (width < targetW && height < targetH) {  return zoomInImage(source, targetW, targetH);  } else if ((width < targetW && width == height) || (height < targetH && width == height)) {  return zoomInImage(source, targetW, targetH);  }  return null;  */   }

   /**  * 按比例裁剪图片  *  * @param source  * 待处理的图片流  * @param startX  * 开始x坐标  * @param startY  * 开始y坐标  * @param endX  * 结束x坐标  * @param endY  * 结束y坐标  * @return  */  public static BufferedImage crop(BufferedImage source, int startX, int startY, int endX, int endY) {
      int width = source.getWidth();
      int height = source.getHeight();

      if (startX <= -1) {
         startX = 0;
      }
      if (startY <= -1) {
         startY = 0;
      }
      if (endX <= -1) {
         endX = width - 1;
      }
      if (endY <= -1) {
         endY = height - 1;
      }
      BufferedImage result = new BufferedImage(endX, endY , source.getType());
      for (int y = startY; y < endY+startY; y++) {
         for (int x = startX; x < endX+startX; x++) {
            int rgb = source.getRGB(x, y);
            result.setRGB(x - startX, y - startY, rgb);
         }
      }
      return result;
   }

   /**  * 旋转图片为指定角度  *  * @param bufferedimage  * 目标图像  * @param degree  * 旋转角度  * @return  */  public static BufferedImage rotateImage(final BufferedImage bufferedimage, final int degree) {
      int w = bufferedimage.getWidth();
      int h = bufferedimage.getHeight();
      int type = bufferedimage.getColorModel().getTransparency();
      BufferedImage img;
      Graphics2D graphics2d;
      (graphics2d = (img = new BufferedImage(h, w, type)).createGraphics()).setRenderingHint(
            RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
      graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2 + (w > h ? (w - h) / 2 : (h - w) / 2));
      graphics2d.drawImage(bufferedimage, 0, 0, null);
      graphics2d.dispose();
      return img;
   }

   /**  * 图片左转90度  *  * @param bufferedimage  * @return  */  public static BufferedImage rotateImageLeft90(BufferedImage bufferedimage) {
      int w = bufferedimage.getWidth();
      int h = bufferedimage.getHeight();
      int type = bufferedimage.getColorModel().getTransparency();
      BufferedImage img;
      Graphics2D graphics2d;
      (graphics2d = (img = new BufferedImage(h, w, type)).createGraphics()).setRenderingHint(
            RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
      graphics2d.rotate(Math.toRadians(270), w / 2, h / 2 + (w - h) / 2);
      graphics2d.drawImage(bufferedimage, 0, 0, null);
      graphics2d.dispose();
      return img;
   }

   /**  * 图片右转90度  *  * @param bufferedimage  * @return  */  public static BufferedImage rotateImageRight90(BufferedImage bufferedimage) {
      int w = bufferedimage.getWidth();
      int h = bufferedimage.getHeight();
      int type = bufferedimage.getColorModel().getTransparency();
      BufferedImage img;
      Graphics2D graphics2d;
      (graphics2d = (img = new BufferedImage(h, w, type)).createGraphics()).setRenderingHint(
            RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
      graphics2d.rotate(Math.toRadians(90), w / 2 - (w - h) / 2, h / 2);
      graphics2d.drawImage(bufferedimage, 0, 0, null);
      graphics2d.dispose();
      return img;
   }

   // 对转  public File rotateImageOppo(File file) throws Exception {
      BufferedImage bufferedimage = ImageIO.read(file);
      int w = bufferedimage.getWidth();
      int h = bufferedimage.getHeight();
      int type = bufferedimage.getColorModel().getTransparency();
      BufferedImage img;
      Graphics2D graphics2d;
      (graphics2d = (img = new BufferedImage(w, h, type)).createGraphics()).setRenderingHint(
            RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
      graphics2d.rotate(Math.toRadians(180), w / 2, h / 2);
      graphics2d.drawImage(bufferedimage, 0, 0, null);
      graphics2d.dispose();
      ImageIO.write(img, "jpg", file);
      return file;
   }

   /***  * 图片镜像处理  *  * @param file  * @param FX  * 0 为上下反转 1 为左右反转  * @return  */  public void imageMisro(File file, int FX) {
      try {
         BufferedImage bufferedimage = ImageIO.read(file);
         int w = bufferedimage.getWidth();
         int h = bufferedimage.getHeight();
         int[][] datas = new int[w][h];
         for (int i = 0; i < h; i++) {
            for (int j = 0; j < w; j++) {
               datas[j][i] = bufferedimage.getRGB(j, i);
            }
         }
         int[][] tmps = new int[w][h];
         if (FX == 0) {
            for (int i = 0, a = h - 1; i < h; i++, a--) {
               for (int j = 0; j < w; j++) {
                  tmps[j][a] = datas[j][i];
               }
            }
         } else if (FX == 1) {
            for (int i = 0; i < h; i++) {
               for (int j = 0, b = w - 1; j < w; j++, b--) {
                  tmps[b][i] = datas[j][i];
               }
            }
         }
         for (int i = 0; i < h; i++) {
            for (int j = 0; j < w; j++) {
               bufferedimage.setRGB(j, i, tmps[j][i]);
            }
         }
         ImageIO.write(bufferedimage, "jpg", file);
      } catch (Exception e) {
         e.printStackTrace();
      }
   }

   /**  * 对图片进行强制放大或缩小  *  * @param originalImage  * 原始图片  * @return  */  public static BufferedImage zoomInImage(BufferedImage originalImage, int width, int height) {
      BufferedImage newImage = new BufferedImage(width, height, originalImage.getType());

      Graphics g = newImage.getGraphics();
      g.drawImage(originalImage, 0, 0, width, height, null);
      g.dispose();
      return newImage;
   }

   /**  * 简易图片识别原理  *  * @param img  * 图片路径  */  public static void discernImg(String img) {
      try {
         File fileOne = new File(img);
         BufferedImage bi = ImageIO.read(fileOne);
         // 获取图像的宽度和高度  int width = bi.getWidth();
         int height = bi.getHeight();

         // 扫描图片  for (int i = 0; i < height; i++) {
            for (int j = 0; j < width; j++) {// 行扫描  int dip = bi.getRGB(j, i);
               if (dip == -1)
                  System.out.print(" ");
               else  System.out.print("♦");
            }
            System.out.println();// 换行  }
      } catch (Exception e) {
         logger.error("图片识别出错", e);
      }
   }

}