大家看看这种今年流行的贺卡技术是怎么实现的?

Question

跟在图片中加上自己的logo思路一样，动态生成图片。 BufferedImage bi = new BufferedImage(imagewidth, imageheight,
                                             BufferedImage.TYPE_INT_RGB);
        Graphics gra = bi.getGraphics(); gra.drawString("something", 0, imageheight); JPEGCodec.createJPEGEncoder(response.getOutputStream()).encode(bi);
        response.getOutputStream().close();

Answer 1

to: pigo(少壮且行英雄梦，迟暮归守温柔乡)我给你发消息了,没看到吗?希望能联系一下

Answer 2

我已经给出思路了，下面再给出一个简单的例子吧，我对图形处理也不了解，也就只知道这么点了：(准备一张jpg格式的图片，像素大于100*100的，放到路径c:/test.jpg，然后运行程序看效果)package com.pigo;import java.io.*;import java.awt.*;
import java.awt.image.*;import com.sun.image.codec.jpeg.*;public class WaterMark {
    public WaterMark() {
        super();
    }    public static void main(String[] args) {
        String imgpath = "c:/test.jpg";
        try {
            java.awt.Toolkit toolkit = java.awt.Toolkit.getDefaultToolkit();
            java.awt.Image appimg = toolkit.getImage(imgpath);
            checkImage(appimg);
            int biWidth = appimg.getWidth(null);
            int biHeight = appimg.getHeight(null);
            BufferedImage bi = new BufferedImage(biWidth, biHeight,
                                                 BufferedImage.TYPE_INT_RGB);
            Graphics gra = bi.getGraphics();
            gra.drawImage(appimg, 0, 0, null);
            gra.setFont(new Font("Dialog", Font.BOLD, 22));
            gra.setColor(Color.PINK);
            gra.drawString("power by pigo", 50, 50);
            java.io.FileOutputStream fo = new FileOutputStream("c:/testnew.jpg");
            JPEGCodec.createJPEGEncoder(fo).encode(
                    bi);
            fo.close();
        } catch (Exception ex) {
            System.out.println("捕获所有错误" + ex.getMessage());
            ex.printStackTrace();
        }
    }    private static void checkImage(Image image) {
        waitForImage(image);
        if (image.getWidth(null) < 1) {
            throw new IllegalArgumentException("image width " + image.getWidth(null) +
                                               " is out of range");
        }
        if (image.getHeight(null) < 1) {
            throw new IllegalArgumentException("image height " +
                                               image.getHeight(null) +
                                               " is out of range");
        }
    }    private static void waitForImage(Image image) {
        try {
            MediaTracker tracker = new MediaTracker(new Component() {});
            tracker.addImage(image, 0);
            tracker.waitForID(0);
            // loadStatus = tracker.statusID( 0, false );
            tracker.removeImage(image, 0);
        } catch (InterruptedException e) {
            System.out.println("加载图片的时候出错了：错误信息如下：");
            e.printStackTrace();
        }
    } }