java水印图片,Java添加水印+图片水印+文字水印
水印的處理...以下有兩種方式:
第一種是添加文字水印:
第二種是添加圖片水印
現(xiàn)在貼上代碼 2種的源碼
package com.yjf.image;
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;
/**
* 圖片工具類, 圖片水印,文字水印,縮放,補(bǔ)白等
* @author Carl He
*/
public final class ImageUtils {
/**圖片格式:JPG*/
private static final String PICTRUE_FORMATE_JPG = "jpg";
private ImageUtils(){}
/**
* 添加圖片水印
* @param targetImg 目標(biāo)圖片路徑,如:C://myPictrue//1.jpg
* @param waterImg? 水印圖片路徑,如:C://myPictrue//logo.png
* @param x 水印圖片距離目標(biāo)圖片左側(cè)的偏移量,如果x<0, 則在正中間
* @param y 水印圖片距離目標(biāo)圖片上側(cè)的偏移量,如果y<0, 則在正中間
* @param alpha 透明度(0.0 -- 1.0, 0.0為完全透明,1.0為完全不透明)
*/
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); // 水印文件結(jié)束
g.dispose();
ImageIO.write(bufferedImage, PICTRUE_FORMATE_JPG, file);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 添加文字水印
* @param targetImg 目標(biāo)圖片路徑,如:C://myPictrue//1.jpg
* @param pressText 水印文字, 如:中國證券網(wǎng)
* @param fontName 字體名稱,??? 如:宋體
* @param fontStyle 字體樣式,如:粗體和斜體(Font.BOLD|Font.ITALIC)
* @param fontSize 字體大小,單位為像素
* @param color 字體顏色
* @param x 水印文字距離目標(biāo)圖片左側(cè)的偏移量,如果x<0, 則在正中間
* @param y 水印文字距離目標(biāo)圖片上側(cè)的偏移量,如果y<0, 則在正中間
* @param alpha 透明度(0.0 -- 1.0, 0.0為完全透明,1.0為完全不透明)
*/
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();
}
}
/**
http://www.qi788.com/info-43.html
* 獲取字符長度,一個(gè)漢字作為 1 個(gè)字符, 一個(gè)英文字母作為 0.5 個(gè)字符
* @param text
* @return 字符長度,如:text="中國",返回 2;text="test",返回 2;text="中國ABC",返回 4.
*/
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;
}
/**
* 圖片縮放
* @param filePath 圖片路徑
* @param height 高度
* @param width 寬度
* @param bb 比例不對時(shí)是否需要補(bǔ)白
*/
public static void resize(String filePath, int height, int width, boolean bb) {
try {
double ratio = 0; //縮放比例
File f = new File(filePath);
BufferedImage bi = ImageIO.read(f);
Image itemp = bi.getScaledInstance(width, height, BufferedImage.SCALE_SMOOTH);
//計(jì)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 {
pressText("D:/yjf/myworkspace/SimilarImageSearch/images/1.jpg", "水印測試文字", "宋體", Font.BOLD, 24, Color.red, 50, 50, 0.3f);
}
}
與50位技術(shù)專家面對面20年技術(shù)見證,附贈技術(shù)全景圖總結(jié)
以上是生活随笔為你收集整理的java水印图片,Java添加水印+图片水印+文字水印的全部內(nèi)容,希望文章能夠幫你解決所遇到的問題。
- 上一篇: java biginteger位数,Ja
- 下一篇: matlab 除噪点,MATLAB应用在