图片处理相关方法
二维码生成相关方法

再pom.xml中添加dependency

<dependency>
      <groupId>cn.hutool</groupId>
      <artifactId>hutool-all</artifactId>
      <version>${hutool.version}</version>
    </dependency>

图片处理：

复制图片

package com.spring.orm.Aop;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;

/**
 * Created by User on 2019/3/11.
 */
public class ImageCopy {
    private static final 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:/img1.jpg");
        File destFile=new File("E:/img1.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();
    }
}

添加水印及其他操作

package com.spring.orm.Aop;

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.Logger;
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 User on 2019/3/11.
 */
@Aspect
public class ImageHandler {
    private  static final Logger logger = LoggerFactory.getLogger(ImageHandler.class);
//    切点函数，必须为空
    @Pointcut("execution(* com.spring.orm.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:/img.jpg");
        InputStream input= new FileInputStream(srcFile);
        BufferedImage srcImg = ImageIO.read(input);
        int width=srcImg.getWidth();
        int height=srcImg.getHeight();
        System.out.println("原图宽："+width+",原图高："+height);
        File destFile=new File("D:/img1.jpg");
        Color color =new Color(211,71,38);
        int size=20;
        Font font =new Font("微软雅黑",Font.BOLD,size);
        String text="zrl";
        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:/img1.jpg");
        File destFile=new File("E:/img2.jpg");
        ImageUtil.gray(srcFile,destFile);
    }
}

运行类

public class ImageCopyApp {
    public static void main(String[] args) {
        ApplicationContext context=new ClassPathXmlApplicationContext("Spring.xml");
        ImageCopy imageCopy=context.getBean(ImageCopy.class);
        try{
            imageCopy.copyImage();
        }catch(IOException e){
            e.printStackTrace();
        }
    }
}

生成网站二维码：

package com.spring.orm.Aop;

import cn.hutool.core.io.FileUtil;
import cn.hutool.extra.qrcode.QrCodeUtil;
import cn.hutool.extra.qrcode.QrConfig;

import java.awt.*;

/**
 * Created by User on 2019/3/11.
 */
public class QrCode {
    public static void main(String[] args) {
       QrConfig config=new QrConfig(300,300);
       config.setImg("d:/img.jpg");
       config.setMargin(3);
        Color foreColor=new Color(173,255,47);
        Color bgColor=new Color(240,255,240);
        int foreColorRGB=foreColor.getRGB();
        int bgColorRGB=bgColor.getRGB();
        config.setForeColor(foreColorRGB);
        config.setBackColor(bgColorRGB);
        QrCodeUtil.generate("https://www.jianshu.com/u/ce6045cb864d",config,FileUtil.file("E:/Logo.jpg"));
    }
}