day06-01 图片复制、水印以及黑白

• 将D盘的一张图片复制到E盘，再给图片添加水印，处理成黑白

import org.slf4j.LoggerFactory;

import java.io.*;

/**
 * Created by Administrator on 2019/3/11.
 */
public class ImageCopy {
    private static final org.slf4j.Logger logger= LoggerFactory.getLogger(ImageCopy.class);
    public void copyImage() throws  IOException{
        logger.info("开始将图片从D盘复制到E盘。。。");
        File srcFile = new File("D:/bg.jpg");
        File destFile=new File("E:/bg.jpg");
        InputStream in=new FileInputStream(srcFile);
        OutputStream out=new FileOutputStream(destFile);
        byte[] bytes=new byte[(int) srcFile.length()];
        int len;
        while((len=in.read(bytes))!=-1){
            out.write(bytes,0,len);
        }
        in.close();
        out.close();
    }
}

import cn.hutool.core.util.ImageUtil;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.LoggerFactory;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
/**
 * Created by Administrator on 2019/3/11.
 */
@Aspect
public class ImageHandler {
    private static final org.slf4j.Logger logger= LoggerFactory.getLogger(ImageHandler.class);
    @Pointcut("execution(* com.spring.Aop.ImageCopy.copyImage())")
    public void handleImage(){
    }
    @Before(value="handleImage()")
    public void pressTextOnImage()throws IOException{
        logger.info("开始给图片添加水印");
        File srcFile=new File("D:/bg.jpg");
        InputStream input=new FileInputStream(srcFile);
        BufferedImage srcImg= ImageIO.read(input);
        int width=srcImg.getWidth();
        int height=srcImg.getHeight();//获取图片大小，用于计算，让水印在右下角
        int size=20;
        File destFile=new File("D:/bg1.jpg");
        Color color=new Color(211,71,38);
        Font font=new Font("微软雅黑",Font.BOLD,size);
        String text="海贼王";
        ImageUtil.pressText(srcFile,destFile,text,color,font,(width-text.length()*size)/2,height/2-size,1.0f);
    }
    @AfterReturning("handleImage()")
    public void grayImage(){
        logger.info("开始将图片转成黑白");
        File srcFile=new File("E:/bg.jpg");
        File destFile=new File("E:/bg2.jpg");
        ImageUtil.gray(srcFile,destFile);
    }
}

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

/**
 * Created by Administrator on 2019/3/11.
 */
public class ImageCopyApp {
    public static void main(String[] args) {
        ApplicationContext context=new ClassPathXmlApplicationContext("beans.xml");
        ImageCopy imageCopy=context.getBean(ImageCopy.class);
        try {
            imageCopy.copyImage();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

• 二维码生成

import cn.hutool.core.io.FileUtil;
import cn.hutool.extra.qrcode.QrCodeUtil;
import cn.hutool.extra.qrcode.QrConfig;
import java.awt.*;
/**
 * Created by Administrator on 2019/3/11.
 */
public class QrCode {
    public static void main(String[] args) {
        QrConfig config = new QrConfig(300, 300);
        config.setImg("D:/lufei04.jpg");
        // 设置边距，既二维码和背景之间的边距
        config.setMargin(3);
        // 设置前景色，既二维码颜色（青色）
        config.setForeColor(Color.CYAN.getRGB());
        // 设置背景色（灰色）
        config.setBackColor(Color.GRAY.getRGB());
        // 生成二维码到文件，也可以到流
        QrCodeUtil.generate("https://www.jianshu.com/u/ec5ebfec0565",config, FileUtil.file("d:/my_code.jpg"));
    }
}

my_code.jpg