imgutil.java

天乙虚拟社区8.05版本。只支持Mysql

package com.laoer.bbscs.comm;

import java.awt.*;
import java.io.*;
import java.awt.image.*;
import com.sun.image.codec.jpeg.*;
//import javax.imageio.*;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.io.*;

/**
 * <p>
 * Title: Tianyi BBS
 * </p>
 *
 * <p>
 * Description: BBSCS
 * </p>
 *
 * <p>
 * Copyright: Copyright (c) 2006
 * </p>
 *
 * <p>
 * Company: Laoer.com
 * </p>
 *
 * @author Gong Tianyi
 * @version 7.0
 */
public class ImgUtil {

	private static final Log logger = LogFactory.getLog(ImgUtil.class);

	public ImgUtil() {
	}

	public static void reduceImg(String imgsrc, String imgdist, int widthdist, int heightdist, int benchmark) {

		// int benchmark说明:0,长宽哪个长，以哪个为标准；1，以宽为基准；2，以高为基准
		try {
			File srcfile = new File(imgsrc);
			if (!srcfile.exists()) {
				return;
			}
			Image src = javax.imageio.ImageIO.read(srcfile);
			int width = src.getWidth(null);
			int height = src.getHeight(null);

			if (width <= widthdist && height <= heightdist) {
				// SysUtil.cpoyFile(imgsrc, imgdist);
				FileUtils.copyFile(new File(imgsrc), new File(imgdist));
				return;
			}

			// 宽度除以高度的比例
			float wh = (float) width / (float) height;

			if (benchmark == 0) {
				if (wh > 1) {
					float tmp_heigth = (float) widthdist / wh;
					BufferedImage tag = new BufferedImage(widthdist, (int) tmp_heigth, BufferedImage.TYPE_INT_RGB);
					tag.getGraphics().drawImage(src, 0, 0, widthdist, (int) tmp_heigth, null);
					FileOutputStream out = new FileOutputStream(imgdist);
					JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
					encoder.encode(tag);
					out.close();
				} else {
					float tmp_width = (float) heightdist * wh;
					BufferedImage tag = new BufferedImage((int) tmp_width, heightdist, BufferedImage.TYPE_INT_RGB);
					tag.getGraphics().drawImage(src, 0, 0, (int) tmp_width, heightdist, null);
					FileOutputStream out = new FileOutputStream(imgdist);
					JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
					encoder.encode(tag);
					out.close();
				}
			}

			if (benchmark == 1) {
				float tmp_heigth = (float) widthdist / wh;
				BufferedImage tag = new BufferedImage(widthdist, (int) tmp_heigth, BufferedImage.TYPE_INT_RGB);
				tag.getGraphics().drawImage(src, 0, 0, widthdist, (int) tmp_heigth, null);
				FileOutputStream out = new FileOutputStream(imgdist);
				JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
				encoder.encode(tag);
				out.close();
			}

			if (benchmark == 2) {
				float tmp_width = (float) heightdist * wh;
				BufferedImage tag = new BufferedImage((int) tmp_width, heightdist, BufferedImage.TYPE_INT_RGB);
				tag.getGraphics().drawImage(src, 0, 0, (int) tmp_width, heightdist, null);
				FileOutputStream out = new FileOutputStream(imgdist);
				JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
				encoder.encode(tag);
				out.close();
			}

			/*
			if (wh > 1) {
				float tmp_heigth = (float) widthdist / wh;
				BufferedImage tag = new BufferedImage(widthdist, (int) tmp_heigth, BufferedImage.TYPE_INT_RGB);
				tag.getGraphics().drawImage(src, 0, 0, widthdist, (int) tmp_heigth, null);
				FileOutputStream out = new FileOutputStream(imgdist);
				JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
				encoder.encode(tag);
				out.close();
			} else {
				if (width <= widthdist && wh > 0.1f) {
					FileUtils.copyFile(new File(imgsrc), new File(imgdist));
					return;
				}
				if (width > widthdist && wh > 0.1f) {
					float tmp_heigth = (float) widthdist / wh;
					BufferedImage tag = new BufferedImage(widthdist, (int) tmp_heigth, BufferedImage.TYPE_INT_RGB);
					tag.getGraphics().drawImage(src, 0, 0, widthdist, (int) tmp_heigth, null);
					FileOutputStream out = new FileOutputStream(imgdist);
					JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
					encoder.encode(tag);
					out.close();
					return;
				}

				float tmp_width = (float) heightdist * wh;
				BufferedImage tag = new BufferedImage((int) tmp_width, heightdist, BufferedImage.TYPE_INT_RGB);
				tag.getGraphics().drawImage(src, 0, 0, (int) tmp_width, heightdist, null);
				FileOutputStream out = new FileOutputStream(imgdist);
				JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
				encoder.encode(tag);
				out.close();

			}*/
		} catch (IOException ex) {
			logger.error(ex);
		}
	}

}