使用@AspectJ的例子書(shū)99頁(yè)

Tiger類(lèi)

package com.experice;

public class Tiger {
public void walk(){
System.out.println("Tiger is walking..");
}
}

Fighter類(lèi)

package com.experice;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
@Aspect
public class Fighter {
@Pointcut("execution(* com.experice.Tiger.walk())")
public void foundTiger(){
}
@Before(value="foundTiger()")
public void foundBefore(){
System.out.println("Fighter wait for Tiger...");
}
@AfterReturning("foundTiger()")
public void foundAfter(){
System.out.println("Fighter flight with Tiger...");
}
}

配置

<aop:aspectj-autoproxy/>
<bean id="fighter" class="com.experice.Fighter"/>
<bean id="tiger" class="com.experice.Tiger"/>

Application主類(lèi)

package com.experice;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Application {
public static void main(String[] args) {
@SuppressWarnings("resources")
ApplicationContext context=new ClassPathXmlApplicationContext("bean.xml");
Tiger tiger=context.getBean(Tiger.class);
tiger.walk();
}

}

配置圖片和相關(guān)的Bean

ImageCopy類(lèi)

package com.experice;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
public class ImageCopy {
// 打印日志
private static final Logger logger= LoggerFactory.getLogger(ImageCopy.class);
public void copyImage() throws IOException{
logger.info("開(kāi)始將圖片從D盤(pán)復(fù)制到E盤(pán)");
File srcFile=new File("D:/bg1.jpg");
File destFile=new File("E:/bg1.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);
}
// 關(guān)閉輸入流和輸出流
in.close();
out.close();
}
}

Imagehandler類(lèi)

package com.experice;
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.;
@Aspect
public class ImageHandler {
private static final Logger logger= LoggerFactory.getLogger(ImageHandler.class);
@Pointcut("execution(* com.experice.ImageCopy.copyImage())")
// 切點(diǎn)函數(shù)涵防，必須為空
public void handleImage()throws IOException {
}
@Before(value="handleImage()")
public void pressTextOnImage() throws IOException {
logger.info("開(kāi)始給圖片添加水印");
File srcFile=new File("D:/bg.jpg");
// 創(chuàng)建一個(gè)BufferedImage對(duì)象
BufferedImage srcImg= ImageIO.read(new FileInputStream(srcFile));
int width=srcImg.getWidth();
int height=srcImg.getHeight();
System.out.println("原圖寬："+width+",原圖稿："+height);
File destFile=new File("D:/bg1.jpg");
Color color=new Color(0,0,0);
int size=18;
Font font=new Font("微軟雅黑",Font.BOLD,size);
String text="個(gè)人圖片";
ImageUtil.pressText(srcFile,destFile,"私密文件",color,font,(width-text.length()size)/2,height/2-size,1.0f);
}
@AfterReturning("handleImage()")
/ public void grayImage(){
logger.info("開(kāi)始將圖片轉(zhuǎn)成黑白");
File srcFile = new File("E:/bg.jpg");
File destFile = new File("E:/bg1.jpg");
ImageUtil.gray(srcFile,destFile);
}*/
public void grayImage(){
logger.info("開(kāi)始將圖片變成黑白");
File srcFile=new File("E:/bg1.jpg");
File destFile=new File("E:/bg2.jpg");
ImageUtil.gray(srcFile,destFile);
}
}

配置

<aop:aspectj-autoproxy/>
<bean id="imageCopy" class="com.experice.ImageCopy"/>
<bean id="imageHandler" class="com.experice.ImageHandler"/>
ImageCopyApp類(lèi)
package com.experice;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;
public class ImageCopyApp {
public static void main(String[] args) {
ApplicationContext context=new ClassPathXmlApplicationContext("bean.xml");
ImageCopy imageCopy=context.getBean(ImageCopy.class);
try {
imageCopy.copyImage();
} catch (IOException e) {
e.printStackTrace();
}
}
}

二維碼的制作

package com.experice;
import cn.hutool.core.io.FileUtil;
import cn.hutool.extra.qrcode.QrCodeUtil;
import cn.hutool.extra.qrcode.QrConfig;
import java.awt.*;
public class QrCodeTest {
public static void main(String[] args) {
QrConfig config = new QrConfig(300, 300);
config.setMargin(3);
Color foreColor =new Color(255,218,185);
Color bgColor = new Color(132,112,255);
int foreColorRGB = foreColor.getRGB();
int bgColorRGB = bgColor.getRGB();
config.setForeColor(foreColorRGB);
config.setBackColor(bgColorRGB);
// 設(shè)置邊距闹伪，既二維碼和背景之間的邊距
config.setMargin(3);
// 設(shè)置前景色，既二維碼顏色（青色）
config.setForeColor(Color.CYAN.getRGB());
// 設(shè)置背景色（灰色）
config.setBackColor(Color.GRAY.getRGB());
// 生成二維碼到文件壮池，也可以到流
QrCodeUtil.generate("http://hutool.cn/", config, FileUtil.file("e:/qrcode.jpg"));

下面這幾行代碼不能讓背景變色

QrCodeUtil.generate(//
"http://hutool.cn/", //二維碼內(nèi)容
QrConfig.create().setImg("d:/bg.jpg"), //附帶logo
FileUtil.file("e:/qrcode.jpg")//寫(xiě)出到的文件
);

下面幾行可以讓背景變色

QrCodeUtil.generate(//
"http://hutool.cn/", //二維碼內(nèi)容
QrConfig.create().setImg("d:/bg.jpg"), //附帶logo
FileUtil.file("e:/qrcode.jpg")//寫(xiě)出到的文件
這個(gè)可以偏瓤，但好像有點(diǎn)不明白
}
}