現在 外面核心，圖片文章比較少，看了拷貝程式碼，而用不了，用相應jar包處理，很多等比例縮放，

達不到 想要的給予的期望:本工具類，是之前做微信印表機寫的 基於java自帶的類，基於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;

/**
 * 微信圖片處理工具
 * 
 * @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);// 寫圖片
}

   /**
    * 縱向合圖的x座標畫素
    */
private final static int y_width = 645;

   /**
    * 標準圖片的y座標畫素,920，是一般照片，1099是郵票照片
    */
private final static int y_height = 920;

   /**
    * 裁剪x座標縮排畫素
    */
private final static int x_retract = 50;

   /**
    * 裁剪y座標縮排畫素
    */
private final static int y_retract = 50;

   /**
    * 系統預設圖片邊框為20
    */
public final static int BORDER = 20;

   /**
    * 橫向合成圖片
    */
public static void xPic(String first, String second, String out) {
      try {
         /* 1 讀取第一張圖片 */
File fileOne = new File(first);
         BufferedImage imageFirst = ImageIO.read(fileOne);
         int width = imageFirst.getWidth();// 圖片寬度
int height = imageFirst.getHeight();// 圖片高度
int[] imageArrayFirst = new int[width * height];// 從圖片中讀取RGB
imageArrayFirst = imageFirst.getRGB(0, 0, width, height, imageArrayFirst, 0, width);

         /* 1 對第二張圖片做相同的處理 */
File fileTwo = new File(second);
         BufferedImage imageSecond = ImageIO.read(fileTwo);
         int widthTwo = imageSecond.getWidth();// 圖片寬度
int heightTwo = imageSecond.getHeight();// 圖片高度
int[] imageArraySecond = new int[widthTwo * heightTwo];
         imageArraySecond = imageSecond.getRGB(0, 0, widthTwo, heightTwo, imageArraySecond, 0, widthTwo);

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

         // 生成新圖片
BufferedImage imageResult = new BufferedImage(width + widthTwo, h, BufferedImage.TYPE_INT_RGB);
         imageResult.setRGB(0, 0, width, height, imageArrayFirst, 0, width);// 設定左半部分的RGB
imageResult.setRGB(width, 0, widthTwo, heightTwo, imageArraySecond, 0, widthTwo);// 設定右半部分的RGB
File outFile = new File(out);
         ImageIO.write(imageResult, "jpg", outFile);// 寫圖片
} catch (Exception e) {
         logger.error("橫向合成圖片出錯....", e);
      }
   }

   /**
    * 縱向合成圖片
    * 
    * @param first
*            放上面的圖片路徑
    * @param second
*            放下面的圖片路徑
    * @param out
*            檔案輸出目錄
    * @param border
*            圖片預留邊框
    */
public static boolean yPic(String first, String second, String out, int border) {
      boolean isOk = true;
      try {
         /* 1 讀取第一張圖片 */
File fileOne = new File(first);
         BufferedImage imageFirst = ImageIO.read(fileOne);
         int width = imageFirst.getWidth();// 圖片寬度
int height = imageFirst.getHeight();// 圖片高度
         /* 2對第二張圖片做相同的處理 */
File fileTwo = new File(second);
         
         BufferedImage imageSecond = ImageIO.read(fileTwo);
         int widthTwo = imageSecond.getWidth();// 圖片寬度
int heightTwo = imageSecond.getHeight();// 圖片高度
         /* 1 讀取第一張圖片begin */
int t_height = y_height - heightTwo;
         // 圖片是橫圖，逆時針旋轉90度再等比縮放
if (width > height) {
            imageFirst = rotateImageLeft90(imageFirst);
         }

         // 等比縮放
imageFirst = resize(imageFirst, y_width, t_height);

         // 縮放後圖片的大小
width = imageFirst.getWidth();// 圖片寬度
height = imageFirst.getHeight();// 圖片高度
         // 等比縮放後，圖片還是太大，裁剪圖片
boolean a_w, a_h = false;
         if ((a_w = (width > y_width)) || (a_h = (height > t_height))) {
            // 起始位置x,y座標
int s_w = 0, s_h = 0;
            // 裁剪x座標時，縮排屬性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座標時，縮排屬性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];// 從圖片中讀取RGB
imageArrayFirst = imageFirst.getRGB(border, 0, (width - border), height, imageArrayFirst, 0,
               (width - border));

         /* 2對第二張圖片做相同的處理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;
         }
         // 圖片高度
int h = height + heightTwo;
         // 生成新圖片
BufferedImage imageResult = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

         // 解決黑色背景,預設的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);// 填充整個螢幕
g.dispose();

         // 留邊框
imageResult.setRGB(border, 0, (width - border * 2), height, imageArrayFirst, 0, (width - border));// 設定左半部分的RGB
imageResult.setRGB(0, height, widthTwo, heightTwo, imageArraySecond, 0, widthTwo);// 設定右半部分的RGB
File outFile = new File(out);
         ImageIO.write(imageResult, "jpg", outFile);// 寫圖片
} catch (Exception e) {
         logger.error("縱向合成圖片失敗....", e);
         isOk = false;
      }
      return isOk;
   }

   /**
    * 全圖列印，圖片縮放、旋轉處理
    * 
    * @param source
*            待處理的圖片
    * @param out
*            處理後文件輸出目錄
    * @param border
*            圖片預留邊框
    */
public static boolean maigaoPic(String source, String out, int border) {
      boolean isOk = true;
      try {
         /* 1 讀取第一張圖片 */
File fileOne = new File(source);
         BufferedImage imageFirst = ImageIO.read(fileOne);
         int width = imageFirst.getWidth();// 圖片寬度
int height = imageFirst.getHeight();// 圖片高度
         // 圖片是橫圖，逆時針旋轉90度再等比縮放
if (width > height) {
            imageFirst = rotateImageLeft90(imageFirst);
         }

         // 等比縮放
imageFirst = resize(imageFirst, y_width, y_height);

         // 縮放後圖片的大小
width = imageFirst.getWidth();// 圖片寬度
height = imageFirst.getHeight();// 圖片高度
         // 等比縮放後，圖片還是太大，裁剪圖片
boolean a_w, a_h = false;
         if ((a_w = (width > y_width)) || (a_h = (height > y_height))) {
            // 起始位置x,y座標
int s_w = 0, s_h = 0;
            // 裁剪x座標時，縮排屬性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座標時，縮排屬性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];// 從圖片中讀取RGB
imageArrayFirst = imageFirst.getRGB(border, 0, (width - border), height, imageArrayFirst, 0,
               (width - border));

         // 生成新圖片
BufferedImage imageResult = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

         // 解決黑色背景,預設的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);// 填充整個螢幕
g.dispose();

         // 留邊框
imageResult.setRGB(border, 0, (width - border * 2), height, imageArrayFirst, 0, (width - border));// 設定左半部分的RGB
File outFile = new File(out);
         ImageIO.write(imageResult, "jpg", outFile);// 寫圖片
} catch (IOException e) {
         logger.error("全圖列印，圖片縮放、旋轉處理失敗....", e);
         isOk = false;
      }
      return isOk;
   }

   /**
    * 實現影象的等比縮放
    * 
    * @param source
*            待處理的圖片流
    * @param targetW
*            寬度
    * @param targetH
*            高度
    * @return
*/
public static BufferedImage resize(BufferedImage source, int targetW, int targetH) {
      int width = source.getWidth();// 圖片寬度
int height = source.getHeight();// 圖片高度
return zoomInImage(source, targetW, targetH);
      // 圖片寬高都太小時，強制放大圖片
      /*
      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;
      */
}

   /**
    * 按比例裁剪圖片
    * 
    * @param source
*            待處理的圖片流
    * @param startX
*            開始x座標
    * @param startY
*            開始y座標
    * @param endX
*            結束x座標
    * @param endY
*            結束y座標
    * @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;
   }

   /**
    * 旋轉圖片為指定角度
    * 
    * @param bufferedimage
*            目標影象
    * @param degree
*            旋轉角度
    * @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;
   }

   /**
    * 圖片左轉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;
   }

   /**
    * 圖片右轉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;
   }

   // 對轉
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;
   }

   /***
    * 圖片映象處理
    * 
    * @param file
* @param FX
*            0 為上下反轉 1 為左右反轉
    * @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();
      }
   }

   /**
    * 對圖片進行強制放大或縮小
    * 
    * @param originalImage
*            原始圖片
    * @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;
   }

   /**
    * 簡易圖片識別原理
    * 
    * @param img
*            圖片路徑
    */
public static void discernImg(String img) {
      try {
         File fileOne = new File(img);
         BufferedImage bi = ImageIO.read(fileOne);
         // 獲取影象的寬度和高度
int width = bi.getWidth();
         int height = bi.getHeight();

         // 掃描圖片
for (int i = 0; i < height; i++) {
            for (int j = 0; j < width; j++) {// 行掃描
int dip = bi.getRGB(j, i);
               if (dip == -1)
                  System.out.print(" ");
               else
System.out.print("♦");
            }
            System.out.println();// 換行
}
      } catch (Exception e) {
         logger.error("圖片識別出錯", e);
      }
   }

}