图片工具类

ImageUtils.java

import org.apache.commons.codec.binary.Base64;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;

public class ImageUtils {

    private ImageUtils() {
    }

    /**
     * 截屏并保存到指定文件
     *
     * @param file
     * @throws AWTException
     * @throws IOException
     */
    public static void screenshot(File file, String fileType) throws AWTException, IOException {
        Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
        Robot robot = new Robot();
        BufferedImage screenshot = robot.createScreenCapture(new Rectangle(dimension));

        ImageIO.write(screenshot, fileType, file);
    }

    /**
     * 将图片流转换成base64字符串
     *
     * @param inputStream
     * @return
     * @throws IOException
     */
    public static String covertToBase64(InputStream inputStream) throws IOException {
        byte[] data = new byte[inputStream.available()];
        inputStream.read(data);

        Base64 base64 = new Base64();
        return base64.encodeAsString(data);
    }

    /**
     * 解析将base64字符串
     *
     * @param base64Str
     * @return
     */
    public static byte[] decodeBase64(String base64Str) {
        Base64 base64 = new Base64();
        return base64.decode(base64Str);
    }
}