package default;import java.io.ByteArrayInputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import javax.imageio.ImageIO;import net.coobird.thumbnailator.Thumbnails;import net.coobird.thumbnailator.geometry.Positions;/** * 图片缩略、裁剪、添加水印工具类 * @author Henry * @version [版本号, Jun 20, 2017] * @see [相关类/方法] * @since [产品/模块版本] */public class ImageThumbUtils { /** 压缩质量为100% */ public static double PERCENT_100 = 1.0; /** * 图片尺寸不变,图片内存压缩 * 压缩图片文件大小outputQuality实现,参数1为最高质量,此处0.1f表示压缩为原内存的1/10 * * @param originalImgPath 源图片路径 * @param targetImgPath 压缩后图片路径 * @throws Exception * @author Henry * @version [版本号, Jun 20, 2017] * @see [类、类#方法、类#成员] */ public static void thumbImage(String originalImgPath, String targetImgPath) throws Exception { Thumbnails.of(originalImgPath).scale(1f).outputQuality(0.1f).toFile(targetImgPath); } /** * 缩略图片，图片质量为源图的100% * @param originalImgPath 源图片存储路径 * @param w 图片压缩后的宽度 * @param h 图片压缩后的高度 * @param targetImgPath 缩略图的存放路径 * @throws Exception * @author Henry * @version [版本号, Jun 20, 2017] * @see [类、类#方法、类#成员] */ public static void thumbImage(String originalImgPath, int w, int h, String targetImgPath) throws Exception { thumbImage(new FileInputStream(originalImgPath), w, h, targetImgPath, PERCENT_100); } /** * 缩略图片，图片质量为源图100% * @param originalImgData 源图片字节数 * @param w 图片压缩后的宽度 * @param h 图片压缩后的高度 * @param targetImgPath 缩略图的存放路径 * @throws Exception * @author Henry * @version [版本号, Jun 20, 2017] * @see [类、类#方法、类#成员] */ public static void thumbImage(byte[] originalImgData, int w, int h, String targetImgPath) throws Exception { thumbImage(new ByteArrayInputStream(originalImgData), w, h, targetImgPath, PERCENT_100); } /** * 按尺寸比例缩略 * @param originalInputSteam 源图输入流 * @param w 缩略宽 * @param h 缩略高 * @param targetImgPath 缩略图存储路径 * @param compressQalitiy 缩略质量比例，0~1之间的数 * @throws Exception * @author Henry * @version [版本号, Jun 20, 2017] * @see [类、类#方法、类#成员] */ public static void thumbImage(InputStream originalInputSteam, int w, int h, String targetImgPath, double compressQalitiy) throws Exception { thumbImage(originalInputSteam, w, h, targetImgPath, compressQalitiy, true); } /** * * @param originalImgInputSteam 源图片输入流 * @param w 图片压缩后的宽度 * @param h 图片压缩后的高度 * @param targetImgPath 缩略图的存放路径 * @param compressQalitiy 压缩比例,0~1之间的double数字 * @param keepAspectRatio 是否保持等比例压缩,是true,不是false * @throws Exception * @author Henry * @version [版本号, Jun 20, 2017] * @see [类、类#方法、类#成员] */ public static void thumbImage(InputStream originalImgInputSteam, int w, int h, String targetImgPath, double compressQalitiy, boolean keepAspectRatio) throws Exception { Thumbnails.of(originalImgInputSteam).size(w, h).outputQuality(Double.valueOf(compressQalitiy)).keepAspectRatio(true).toFile(targetImgPath); } /** * 图片裁剪 * @param originalImgPath 源图片路径 * @param position 位置 0正中间，1中间左边，2中间右边，3底部中间，4底部左边，5底部右边，6顶部中间，7顶部左边，8顶部右边,其他为默认正中间 * @param w 裁剪宽度 * @param h 裁剪高度 * @param targetImgPath 新图片路径 * @throws Exception * @author Henry * @version [版本号, Jun 20, 2017] * @see [类、类#方法、类#成员] */ public static void crop(String originalImgPath, int position, int w, int h, String targetImgPath) throws Exception { Thumbnails.of(originalImgPath).sourceRegion(getPositions(position), w, h).size(w, h).outputQuality(1).toFile(targetImgPath); } /** * 图片添加水印 * @param originalImgPath 将被添加水印图片路径 * @param watermarkImgPath 水印图片 * @param position 位置 0正中间，1中间左边，2中间右边，3底部中间，4底部左边，5底部右边，6顶部中间，7顶部左边，8顶部右边，其他为默认正中间 * @param opacity 不透明度,取0~1之间的float数字，0完全透明，1完全不透明 * @param targetImgPath 含有水印的新图片路径 * @throws Exception * @author Henry * @version [版本号, Jun 20, 2017] * @see [类、类#方法、类#成员] */ public static void watermark(String originalImgPath, String watermarkImgPath, int position, float opacity, String targetImgPath) throws Exception { Thumbnails.of(originalImgPath).watermark(getPositions(position), ImageIO.read(new File(watermarkImgPath)), opacity).scale(1.0).outputQuality(1).toFile(targetImgPath); } private static Positions getPositions(int position) { Positions p = Positions.CENTER; switch (position) { case 0: { p = Positions.CENTER; break; } case 1: { p = Positions.CENTER_LEFT; break; } case 2: { p = Positions.CENTER_RIGHT; break; } case 3: { p = Positions.BOTTOM_CENTER; break; } case 4: { p = Positions.BOTTOM_LEFT; break; } case 5: { p = Positions.BOTTOM_RIGHT; break; } case 6: { p = Positions.TOP_CENTER; break; } case 7: { p = Positions.TOP_LEFT; break; } case 8: { p = Positions.TOP_RIGHT; break; } default: { p = Positions.CENTER; break; } } return p; }}
转载于:https://www.cnblogs.com/zhc-hnust/p/7039502.html
相关资源：数据结构—成绩单生成器