java中图像与数组转换

import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class ImageWithArray {
 public static void main(String[] args) {
  // 读取图片到BufferedImage
  BufferedImage bf = readImage("c:\tmp\6\female.png");//这里写你要读取的绝对路径+文件名
  // 将图片转换为二维数组
  int[][] rgbArray1 = convertImageToArray(bf);
  // 输出图片到指定文件
  writeImageFromArray("c:\tmp\2.png", "png", rgbArray1);//这里写你要输出的绝对路径+文件名
  System.out.println("图片输出完毕!");
 }
 public static BufferedImage readImage(String imageFile){
  File file = new File(imageFile);
  BufferedImage bf = null;
  try {
   bf = ImageIO.read(file);
  } catch (IOException e) {
   e.printStackTrace();
  }
  return bf;
 }
 public static int[][] convertImageToArray(BufferedImage bf) {
  // 获取图片宽度和高度
  int width = bf.getWidth();
  int height = bf.getHeight();
  // 将图片sRGB数据写入一维数组
  int[] data = new int[width*height];
  bf.getRGB(0, 0, width, height, data, 0, width);
  // 将一维数组转换为为二维数组
  int[][] rgbArray = new int[height][width];
  for(int i = 0; i < height; i++)
   for(int j = 0; j < width; j++)
    rgbArray[i][j] = data[i*width + j];
  return rgbArray;
 }
 public static void writeImageFromArray(String imageFile, String type, int[][] rgbArray){
  // 获取数组宽度和高度
  int width = rgbArray[0].length;
  int height = rgbArray.length;
  // 将二维数组转换为一维数组
  int[] data = new int[width*height];
  for(int i = 0; i < height; i++)
   for(int j = 0; j < width; j++)
    data[i*width + j] = rgbArray[i][j];
  // 将数据写入BufferedImage
  BufferedImage bf = new BufferedImage(width, height, BufferedImage.TYPE_INT_BGR);
  bf.setRGB(0, 0, width, height, data, 0, width);
  // 输出图片
  try {
   File file= new File(imageFile);
   ImageIO.write((RenderedImage)bf, type, file);
  } catch (IOException e) {
   e.printStackTrace();
  }
 }
}