用Java实现给图片添加文字

package image;import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;import javax.imageio.ImageIO;public class WaterMarkUtils { public void addWaterMark(String srcImgPath, String tarImgPath, String waterMarkContent,Color markContentColor,Font font) { try {
// 读取原图片信息
File srcImgFile = new File(srcImgPath);//得到文件
Image srcImg = ImageIO.read(srcImgFile);//文件转化为图片
int srcImgWidth = srcImg.getWidth(null);//获取图片的宽
int srcImgHeight = srcImg.getHeight(null);//获取图片的高
// 加水印
BufferedImage bufImg = new BufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D g = bufImg.createGraphics();
g.drawImage(srcImg, 0, 0, srcImgWidth, srcImgHeight, null);
g.setColor(markContentColor); //根据图片的背景设置水印颜色
g.setFont(font); //设置字体 //设置水印的坐标
int x = srcImgWidth - 2*getWatermarkLength(waterMarkContent, g);
int y = srcImgHeight - 2*getWatermarkLength(waterMarkContent, g);
g.drawString(waterMarkContent, x, y); //画出水印
g.dispose();
// 输出图片
FileOutputStream outImgStream = new FileOutputStream(tarImgPath);
ImageIO.write(bufImg, "jpg", outImgStream);
System.out.println("添加水印完成");
outImgStream.flush();
outImgStream.close(); } catch (Exception e) {
// TODO: handle exception
}
}
public int getWatermarkLength(String waterMarkContent, Graphics2D g) {
return g.getFontMetrics(g.getFont()).charsWidth(waterMarkContent.toCharArray(), 0, waterMarkContent.length());
}
public static void main(String[] args) {
Font font = new Font("微软雅黑", Font.PLAIN, 35); //水印字体
String srcImgPath="H:/s.jpg"; //源图片地址
String tarImgPath="H:/t.jpg"; //待存储的地址
String waterMarkContent="图片来源：http://blog.csdn.net/zjq_1314520"; //水印内容
Color color=new Color(255,255,255,128); //水印图片色彩以及透明度
new WaterMarkUtils().addWaterMark(srcImgPath, tarImgPath, color, waterMarkContent,font); }
}