图片本地间操作

• 图片的复制

public class ImageCopy{
     private static final Logger logger = LoggerFactory.getLogger(ImageCopy.class);

    public void copyImage() throws IOException{
        logger.info("从d盘复制到e盘");
        File srcFile = new File("D:/bg.jpg"); //原图片位置
        File destFile = new File("E:/bg1.jpg"); //目的图片位置
        InputStream in = new FileInputStream(srcFile);
        OutputStream out =new FileOutputStream(destFile);
        byte[] bytes = new byte[(int) srcFile.length()];//一段一段的获取原文件字节
        int len;
        //传递字节
        while ((len = in.read(bytes)) != -1){
            out.write(bytes,0,len);
        }
        //关闭io流
        in.close();
        out.close();
    }
}

• 图片加水印和黑白效果
  该效果用前置增强类型和后置增强类型进行操作,需要添加依赖,版本号在<properties>中添加

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

该依赖使用参考Hutool

@Aspect//引用aspectj依赖
public class ImageHandler {
    private static final Logger logger = LoggerFactory.getLogger(ImageCopy.class);
    private int width;
    private int height;

    @Pointcut("execution(* com.spring.image.ImageCopy.copyImage())")
    public void handleImage(){}

    @Before(value = "handleImage()")
    public void pressTextOnImage(){
        logger.info("开始加水印");
        File srcFile = new File("D:/bg.jpg");
        File destFile = new File("D:/bg1.jpg");
           Image image;
        try {
             image = ImageIO.read(srcFile);//读取图片
            width =image.getWidth(null);
            height = image.getHeight(null);
        } catch (IOException e) {
            e.printStackTrace();
        }
        Color color = new Color(211,71,38);//水印颜色
        Font font = new Font("微软雅黑",Font.BOLD,40);//水印字体
        //hutool依赖中的方法
        ImageUtil.pressText(srcFile,destFile,"Spring AOP水印",color,font,width/4+font.getSize(),height/2-font.getSize(),1.0f);
    }

    @AfterReturning("handleImage()")
    public void grayImage(){
        logger.info("开始转黑白");
        File srcFile = new File("E:/bg1.jpg");
        File destFile = new File("E:/bg2.jpg");
        //hutool依赖中的方法
        ImageUtil.gray(srcFile,destFile);
    }

}

之后对两个类在**.xml文件中进行配置

<aop:aspectj-autoproxy/>
    <bean id="imageCopy" class="com.spring.image.ImageCopy"/>
    <bean id="imageHandler" class="com.spring.image.ImageHandler"/>

最后执行结果

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

二维码的生成

使用时同样需要依赖hutool,并且需要引入新的依赖,才能使用二维码工具QrCodeUtil

<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.3.3</version>
</dependency>

public class Qr {
    public static void main(String[] args) {
        QrConfig qrConfig = new QrConfig(300,300);
        qrConfig.setMargin(3);
        Color foreColor = new Color(210, 180, 140);
        Color bgColor = new Color(216, 191, 216);
        int foreColorRGB = foreColor.getRGB();
        int bgColorRGB = bgColor.getRGB();

        /*
        * content:需要生成二维码的网站
        * setImg()需要插入二维码中心的图标
        * FileUtil.file()生成二维码的位置
        * */
        QrCodeUtil.generate(
                "https://www.baidu.com/",
                QrConfig.create().setImg("d:/top.jpg").setBackColor(bgColorRGB).setForeColor(foreColorRGB),
                FileUtil.file("e:/qrcodeWithLogo.jpg")
        );
    }
}