博客

package com.ssy.cutimg.tools.test;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.Transparency;
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.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedList;
import java.util.concurrent.CountDownLatch;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
/**
 * 将图片切成四份
 * 切10000像素以上的  同时切两张  不能同时三张
 * */
public class ThreadCutLargeImg2 {
		static int threadNumber = 8;
		static final CountDownLatch countDownLatch = new CountDownLatch(threadNumber);
		public static void main(String[] args) throws IOException {
			System.out.println("Hello World");
			long startTime = System.currentTimeMillis();// 开始时间
	        Date date = new Date();
	        String strDateFormat = "yyyy-MM-dd HH:mm:ss";
	        SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
	        System.out.println("----------------------------开始时间----------------------------:"+sdf.format(date));
	        ThreadCutLargeTiles my = new ThreadCutLargeTiles();
			my.init();
			for (int i = 0; i < threadNumber; i++) {
				new Thread(my, "thread" + i).start();
			}
			try {
				countDownLatch.await();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			int mill = (int) ((System.currentTimeMillis() - startTime) / 1000);
	        date = new Date();
	        sdf = new SimpleDateFormat(strDateFormat);
	        System.out.println("----------------------------结 束  时 间----------------------------:"+sdf.format(date));
			System.out.println("----------------------------执行总时间----------------------------:" + (mill / 60) + " 分 " + (mill % 60) + " 秒 ");// 72388
		}

}
/**
 * @author ssy
 */
class ThreadCutLargeTiles implements Runnable {
	LinkedList<File> files = new LinkedList<File>();
	public static String defPath = "c://javaImg//";
	public void init() throws IOException {
		File defFile = new File(defPath);
		if (defFile.isDirectory()) {
			File[] listFiles = defFile.listFiles();
			for (File f : listFiles) {
				String weizhui = f.getName().substring(f.getName().lastIndexOf('.')+1);
				if (f.isFile()) {
					if("jpg".equals(weizhui)||"png".equals(weizhui)||"JPG".equals(weizhui)||"PNG".equals(weizhui)){
						files.addLast(f);
					}
				}
			}
		} else {
			System.out.println("++目录不存在" + defPath);
		}

		String succDirStr = defPath + "success//ori//";
		File succFile = new File(succDirStr);
		if (!succFile.exists()) {
			succFile.mkdirs();
		}
	}

	@Override
	public void run() {
		System.out.println("=运行线程  " + Thread.currentThread().getName());
		while (!files.isEmpty()) {
			File origionFile = files.removeLast();
			System.out.println(origionFile.getName());
				if (origionFile.isFile()) {
					largeCut(origionFile);
				}
		}
		ThreadCutLargeImg2.countDownLatch.countDown();
	}
	
	
	/*
	 * image 转  BufferedImage
	 * */
	public static BufferedImage toBufferedImage(Image image) {
	    if (image instanceof BufferedImage) {
	        return (BufferedImage)image;
	     }
	     image = new ImageIcon(image).getImage();
	     BufferedImage bimage = null;
	     GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
	    try {
	        int transparency = Transparency.OPAQUE;
	         GraphicsDevice gs = ge.getDefaultScreenDevice();
	         GraphicsConfiguration gc = gs.getDefaultConfiguration();
	         bimage = gc.createCompatibleImage(
	         image.getWidth(null), image.getHeight(null), transparency);
	     } catch (HeadlessException e) {
	     }
	 
	    if (bimage == null) {
	        int type = BufferedImage.TYPE_INT_RGB;
	        bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
	     }
	     Graphics g = bimage.createGraphics();
	 
	     g.drawImage(image, 0, 0, null);
	     g.dispose();
	 
	    return bimage;
	}
	private static void largeCut(File origionFile) {
		int rows = 2;
		int cols = 2;
		String descDir = defPath + "largeCut//" ;
		File descFile = new File(descDir);
		descFile.mkdirs();
		try {
			System.out.println("--------------操作瓦片--------------"+origionFile);
			BufferedImage bi = ImageIO.read(new File(origionFile.toString()));
			int srcWidth = bi.getWidth(); 
			int srcHeight = bi.getHeight();
			if (srcWidth > 0 && srcHeight > 0) {
				Image img;
				ImageFilter cropFilter;
				Image image = bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_DEFAULT);
				int destWidth = srcWidth;
				int destHeight = srcHeight;
				if (srcWidth % rows == 0) {
					destWidth = srcWidth / rows;
				} else {
					destWidth = (int) Math.floor(srcWidth / rows) + 1;
				}
				if (srcHeight % cols == 0) {
					destHeight = srcHeight / cols;
				} else {
					destHeight = (int) Math.floor(srcWidth / cols) + 1;
				}
				for (int j = 1; j < cols + 1; j++) {
								for (int i = 1; i < rows + 1; i++) {
						File tileFile = new File(descDir);
						cropFilter = new CropImageFilter((i - 1) * destWidth, (j - 1) * destHeight, destWidth,destHeight);
						img = Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(image.getSource(), cropFilter));
						/*------------------TYPE_INT_ARGB是png图片----------------TYPE_INT_RGB是jpg图片---还有许多类型  灰度之类的-------*/
						BufferedImage tag = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_ARGB);
//						BufferedImage tag = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB);
						Graphics2D g = tag.createGraphics();// new
						g.drawImage(img, 0, 0, null);
						g.dispose();
						String javaimgname = "javaimgname";
						if(tileFile.exists()){
							String newFile = tileFile.toString();
							ImageIO.write(tag, "PNG", new File(newFile + "/"+javaimgname+j+""+i+".png"));
						}else{
							tileFile.mkdirs();
							String newFile = tileFile.toString();
							ImageIO.write(tag, "PNG", new File(newFile + "/"+javaimgname+j+""+i+".png"));
						}
					}
				}
			}
			if (origionFile.renameTo(new File(defPath + "success//oper//" + origionFile.getName()))) {
				System.out.println("+++++++++++++++++++++++++文件移动成功+++++++++++++++++++++++++" + defPath + origionFile.getName());
			} else {
				System.out.println("-------------------------文件移动失败-------------------------" + defPath + origionFile.getName());
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return;
	}
}

切PNG图片和JPG图片需用不同方法，PNG用TYPE_INT_ARGB，JPG用TYPE_INT_RGB

问题

改成网页版部署在tomcat下，执行后内存升高，执行结束后也未降低，是不是线程的问题，或者执行结束或应清理下内存，应该怎么设置TAT