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有时候对于一些截图需要通过画框重点显示，用java代码在图片上画框的代码如下：

package imagetest;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import javax.imageio.ImageIO;

public class ImageTest {

public static void main(String[] args) throws IOException {


InputStream in = new FileInputStream(“d:\\test.jpg”);//图片路径

BufferedImage image = ImageIO.read(new File(“d:\\test.jpg”));

Graphics g = image.getGraphics();

g.setColor(Color.RED);//画笔颜色

g.drawRect(100, 100, 100, 100);//矩形框(原点x坐标，原点y坐标，矩形的长，矩形的宽)

//g.dispose();

FileOutputStream out = new FileOutputStream(“d:\\test2.jpg”);//输出图片的地址

ImageIO.write(image, “jpeg”, out);

}

}