Java添加水印（圖檔水印，文字水印）

第一種是添加文字水印：

import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.swing.*;
import com.sun.image.codec.jpeg.*;

public class WaterSet {
    /**
     * 給圖檔添加水印
     * 
     * @param filePath
     *            需要添加水印的圖檔的路徑
     * @param markContent
     *            水印的文字
     * @param markContentColor
     *            水印文字的顔色
     * @param qualNum
     *            圖檔品質
     * @return
     */
    public boolean createMark(String filePath, String markContent,
            Color markContentColor, float qualNum) {
        ImageIcon imgIcon = new ImageIcon(filePath);
        Image theImg = imgIcon.getImage();
        int width = theImg.getWidth(null);
        int height = theImg.getHeight(null);
        BufferedImage bimage = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g = bimage.createGraphics();
        g.setColor(markContentColor);
        g.setBackground(Color.white);
        g.drawImage(theImg, 0, 0, null);
        g.drawString(markContent, width / 5, height / 5); // 添加水印的文字和設定水印文字出現的内容
        g.dispose();
        try {
            FileOutputStream out = new FileOutputStream(filePath);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bimage);
            param.setQuality(qualNum, true);
            encoder.encode(bimage, param);
            out.close();
        } catch (Exception e) {
            return false;
        }
        return true;
    }
}
           

第二種是添加圖檔水印和文字水印兩種方法，水印圖檔可以是GIF,PNG透明的檔案，我一般采用的是PNG的，因為它的品質和GIF相比要高一些：

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import javax.imageio.ImageIO;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

public final class ImageUtils {
    public ImageUtils() {

    }

    /*
     * public final static String getPressImgPath() { return ApplicationContext
     * .getRealPath("/template/data/util/shuiyin.gif"); }
     */

    /**
     * 把圖檔印刷到圖檔上
     * 
     * @param pressImg --
     *            水印檔案
     * @param targetImg --
     *            目标檔案
     * @param x
     *            --x坐标
     * @param y
     *            --y坐标
     */
    public final static void pressImage(String pressImg, String targetImg,
            int x, int y) {
        try {
            //目标檔案
            File _file = new File(targetImg);
            Image src = ImageIO.read(_file);
            int wideth = src.getWidth(null);
            int height = src.getHeight(null);
            BufferedImage image = new BufferedImage(wideth, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = image.createGraphics();
            g.drawImage(src, 0, 0, wideth, height, null);

            //水印檔案
            File _filebiao = new File(pressImg);
            Image src_biao = ImageIO.read(_filebiao);
            int wideth_biao = src_biao.getWidth(null);
            int height_biao = src_biao.getHeight(null);
            g.drawImage(src_biao, (wideth - wideth_biao) / 2,
                    (height - height_biao) / 2, wideth_biao, height_biao, null);
            //水印檔案結束
            g.dispose();
            FileOutputStream out = new FileOutputStream(targetImg);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            encoder.encode(image);
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 列印文字水印圖檔
     * 
     * @param pressText
     *            --文字
     * @param targetImg --
     *            目标圖檔
     * @param fontName --
     *            字型名
     * @param fontStyle --
     *            字型樣式
     * @param color --
     *            字型顔色
     * @param fontSize --
     *            字型大小
     * @param x --
     *            偏移量
     * @param y
     */

    public static void pressText(String pressText, String targetImg,
            String fontName, int fontStyle, int color, int fontSize, int x,
            int y) {
        try {
            File _file = new File(targetImg);
            Image src = ImageIO.read(_file);
            int wideth = src.getWidth(null);
            int height = src.getHeight(null);
            BufferedImage image = new BufferedImage(wideth, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = image.createGraphics();
            g.drawImage(src, 0, 0, wideth, height, null);
            // String s="www.qhd.com.cn";
            g.setColor(Color.RED);
            g.setFont(new Font(fontName, fontStyle, fontSize));

            g.drawString(pressText, wideth - fontSize - x, height - fontSize
                    / 2 - y);
            g.dispose();
            FileOutputStream out = new FileOutputStream(targetImg);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            encoder.encode(image);
            out.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    public static void main(String[] args) {
        pressImage("F:/logo.png",          "F:/123.jpg", 0, 0);
    }
}
           

 原文連結如下：

https://my.oschina.net/jgy/blog/55702?fromerr=AuPHExZk