图片处理，水印图标，水印文字

package com.fz.util;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.font.FontRenderContext;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Random;

import javax.imageio.ImageIO;

public class ImageText {

	public static void main(String[] args) {
		File file = new File("c:/dd");
		File[] f = file.listFiles();
		for (File file2 : f) {
			//writerText(file2);
		   logo(file2);
			
		}
	}
	
	//水印图标
public static void logo(File file) {
		
		BufferedImage logo;
		try {
			//File file2 = new File("C:/Users/Administrator/Desktop/65724_1408730_93.png");
			File file2 = new File("65724_1408730_93.png");
			logo = ImageIO.read(file2);
			int lw = logo.getWidth();
			int lh = logo.getHeight();
			
			BufferedImage dst = ImageIO.read(file);
			Graphics g = dst.getGraphics();
			int dw = dst.getWidth();
			int dh = dst.getHeight();
			int x = dw-lw-10;
			int y = dh-lh-100;
			
			//功能是logo图像，在a.jpg的xy坐标写入
			g.drawImage(logo, x, y, null);
			g.dispose();
			ImageIO.write(dst, "jpg", file);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
	
	
	// 添加外部字体
	public static Font loadFont(String fontFileName, float fontSize) { // 第一个参数是外部字体名，第二个是字体大小
		try {
			File file = new File(fontFileName);
			FileInputStream aixing = new FileInputStream(file);
			Font dynamicFont = Font.createFont(Font.TRUETYPE_FONT, aixing);
			Font dynamicFontPt = dynamicFont.deriveFont(fontSize);
			aixing.close();
			return dynamicFontPt;
		} catch (Exception e) {// 异常处理
			return new Font("宋体", Font.PLAIN, 50);
		}
	}

	

	//水印文字
	public static void writerText(File file) {
		if (file.exists()) {
			try {
				// 获取读到的图片
				BufferedImage image = ImageIO.read(file);
				//
				int w = image.getWidth();
				int h = image.getHeight();
				// name 文件路径 w 文件宽 h 文件高
				System.out.printf("name:%s w:%d h:%d", file.getAbsolutePath(),
						w, h);
				System.out.println();
				Random random = new Random();
				Graphics2D g = (Graphics2D) image.getGraphics();
				g.setColor(new Color(random.nextInt(255), random.nextInt(255),
						random.nextInt(255), random.nextInt(150) + 100));
//				g.setFont(new Font("宋体", Font.BOLD, 40));
				
				//外部字体
				Font font = loadFont("maozedong.ttf",50); 
				g.setFont(font);

				String text = "一本道";
				FontRenderContext frc = new FontRenderContext(new AffineTransform(),true,true);
				Rectangle rec = font.getStringBounds(text, frc).getBounds();
				double tw = rec.getWidth();
				double th = rec.getHeight();
				
				double x = w-tw-10;
				double y = h-10;
				// 1.编写文字 2.文字显示横坐标 3.文字显示纵坐标
				 g.drawString(text, (int)x, (int)y);
				// 1.图片对象 2.图片扩展名 3.读取的文件
				ImageIO.write(image, "jpg", file);

			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}