java 图片水印_JAVA_编程开发_程序员俱乐部

?package com.dfkj.web.common.util;
??
?import java.awt.AlphaComposite;
?import java.awt.Color;
?import java.awt.Font;
?import java.awt.Graphics2D;
?import java.awt.Image;
?import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
?import java.awt.image.BufferedImage;
?import java.io.File;
import java.io.IOException;
?import javax.imageio.ImageIO;
?/**
?17? * 图片工具类， 图片水印，文字水印，缩放，补白等
?18? * @author Carl He
?19? */
?public final class ImageUtils2 {
???? /**图片格式：JPG*/
???? private static final String PICTRUE_FORMATE_JPG = "jpg";
???
??? private ImageUtils2(){}
??? /**
????? * 添加图片水印
????? * @param targetImg 目标图片路径，如：C://myPictrue//1.jpg
????? * @param waterImg? 水印图片路径，如：C://myPictrue//logo.png
????? * @param x 水印图片距离目标图片左侧的偏移量，如果x<0, 则在正中间
????? * @param y 水印图片距离目标图片上侧的偏移量，如果y<0, 则在正中间
????? * @param alpha 透明度(0.0 -- 1.0, 0.0为完全透明，1.0为完全不透明)
?*/
???? public final static void pressImage(String targetImg, String waterImg, int x, int y, float alpha) {
???????????? try {
???????????????? File file = new File(targetImg);
???????????????? Image image = ImageIO.read(file);
???????????????? int width = image.getWidth(null);
???????????????? int height = image.getHeight(null);
??????????????? BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
???????????????? Graphics2D g = bufferedImage.createGraphics();
???????????????? g.drawImage(image, 0, 0, width, height, null);
????????????
??????????????? Image waterImage = ImageIO.read(new File(waterImg));??? // 水印文件
???????????????? int width_1 = waterImage.getWidth(null);
???????????????? int height_1 = waterImage.getHeight(null);
???????????????? g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));
????????????????
??????????????? int widthDiff = width - width_1;
??????????????? int heightDiff = height - height_1;
???????????????? if(x < 0){
??????????????????? x = widthDiff / 2;
???????????????? }else if(x > widthDiff){
??????????????????? x = widthDiff;
???????????????? }
??????????????? if(y < 0){
???????????????????? y = heightDiff / 2;
???????????????? }else if(y > heightDiff){
???????????????????? y = heightDiff;
???????????????? }
???????????????? g.drawImage(waterImage, x, y, width_1, height_1, null); // 水印文件结束
???????????????? g.dispose();
??????????????? ImageIO.write(bufferedImage, PICTRUE_FORMATE_JPG, file);
???????????? } catch (IOException e) {
??????????????? e.printStackTrace();
???????????? }
???? }
?
???? /**
????? * 添加文字水印
????? * @param targetImg 目标图片路径，如：C://myPictrue//1.jpg
????? * @param pressText 水印文字， 如：中国证券网
????? * @param fontName 字体名称，??? 如：宋体
????? * @param fontStyle 字体样式，如：粗体和斜体(Font.BOLD|Font.ITALIC)
?????? * @param fontSize 字体大小，单位为像素
????? * @param color 字体颜色
????? * @param x 水印文字距离目标图片左侧的偏移量，如果x<0, 则在正中间
????? * @param y 水印文字距离目标图片上侧的偏移量，如果y<0, 则在正中间
????? * @param alpha 透明度(0.0 -- 1.0, 0.0为完全透明，1.0为完全不透明)
?*/
???? public static void pressText(String targetImg, String pressText, String fontName, int fontStyle, int fontSize, Color color, int x, int y, float alpha) {
???????? try {
???????????? File file = new File(targetImg);
????????????
???????????? Image image = ImageIO.read(file);
???????????? int width = image.getWidth(null);
???????????? int height = image.getHeight(null);
???????????? BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
???????????? Graphics2D g = bufferedImage.createGraphics();
???????????? g.drawImage(image, 0, 0, width, height, null);
???????????? g.setFont(new Font(fontName, fontStyle, fontSize));
???????????? g.setColor(color);
???????????? g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));
????????????
???????????? int width_1 = fontSize * getLength(pressText);
???????????? int height_1 = fontSize;
???????????? int widthDiff = width - width_1;
????????????? int heightDiff = height - height_1;
???????????? if(x < 0){
???????????????? x = widthDiff / 2;
???????????? }else if(x > widthDiff){
???????????????? x = widthDiff;
???????????? }
???????????? if(y < 0){
???????????????? y = heightDiff / 2;
??????????? }else if(y > heightDiff){
???????????????? y = heightDiff;
???????????? }
????????????
???????????? g.drawString(pressText, x, y + height_1);
???????????? g.dispose();
???????????? ImageIO.write(bufferedImage, PICTRUE_FORMATE_JPG, file);
???????? } catch (Exception e) {
???????????? e.printStackTrace();
???????? }
???? }
????
???? /**
118????? * 获取字符长度，一个汉字作为 1 个字符, 一个英文字母作为 0.5 个字符
119????? * @param text
120????? * @return 字符长度，如：text="中国",返回 2；text="test",返回 2；text="中国ABC",返回 4.
121 */
???? public static int getLength(String text) {
???????? int textLength = text.length();
???????? int length = textLength;
???????? for (int i = 0; i < textLength; i++) {
???????????? if (String.valueOf(text.charAt(i)).getBytes().length > 1) {
???????????????? length++;
???????????? }
???????? }
??????? return (length % 2 == 0) ? length / 2 : length / 2 + 1;
???? }
?
???? /**
134????? * 图片缩放
135????? * @param filePath 图片路径
136????? * @param height 高度
137????? * @param width 宽度
138????? * @param bb 比例不对时是否需要补白
139 */
??? public static void resize(String filePath, int height, int width, boolean bb) {
???????? try {
???????????? double ratio = 0; //缩放比例???
??????????? File f = new File(filePath);??
???????????? BufferedImage bi = ImageIO.read(f);??
???????????? Image itemp = bi.getScaledInstance(width, height, BufferedImage.SCALE_SMOOTH);??
??????????? //计算比例??
???????????? if ((bi.getHeight() > height) || (bi.getWidth() > width)) {??
???????????????? if (bi.getHeight() > bi.getWidth()) {??
???????????????????? ratio = (new Integer(height)).doubleValue() / bi.getHeight();??
???????????????? } else {??
???????????????????? ratio = (new Integer(width)).doubleValue() / bi.getWidth();??
???????????????? }??
???????????????? AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(ratio, ratio), null);??
??????????????? itemp = op.filter(bi, null);??
???????????? }??
???????????? if (bb) {??
???????????????? BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);??
???????????????? Graphics2D g = image.createGraphics();??
???????????????? g.setColor(Color.white);??
???????????????? g.fillRect(0, 0, width, height);??
???????????????? if (width == itemp.getWidth(null))??
??????????????????? g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, itemp.getWidth(null), itemp.getHeight(null), Color.white, null);??
??????????????? else?
???????????????????? g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, itemp.getWidth(null), itemp.getHeight(null), Color.white, null);??
???????????????? g.dispose();??
??????????????? itemp = image;??
???????????? }
???????????? ImageIO.write((BufferedImage) itemp, "jpg", f);??
???????? } catch (IOException e) {
???????????? e.printStackTrace();
???????? }
???? }
?
???? public static void main(String[] args) throws IOException {
//???????? pressImage("C://pic//jpg", "C://pic//test.gif", 5000, 5000, 0f);
???????? pressText("f://aa.png", "旺仔之印", "宋体", Font.BOLD|Font.ITALIC, 100, Color.BLACK, 400, 200, 0.3f);
//???????? resize("C://pic//4.jpg", 1000, 500, true);
???? }
?}