package com.nuvole.util;
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import javax.imageio.ImageIO;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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//// @formatter:off
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//import javax.imageio.*;import javax.imageio.metadata.IIOMetadata;import javax.imageio.stream.ImageOutputStream;import java.awt.*;import java.awt.image.BufferedImage;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream; /**
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// * .-~~~~~~~~~-._ _.-~~~~~~~~~-.
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// * __.' @Author ~. .~ 代码无Bug `.__
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// * .'// liu.q \./ (秘籍) \\`.
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// * .'// [916000612@qq.com] | 欲练神功 引刀自宫 \\`.
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// * .'// .-~"""""""~~~~-._ | _,-~~~~"""""""~-. \\`.
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// * .'//.-" 2019-04-24 `-. | .-' 12:53 "-.\\`.
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// * .'//______.============-.. \ | / ..-============.______\\`.
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// *.'______________________________\|/______________________________`.
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// *
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// * @Description :
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// */
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//// @formatter:on
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//
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public class ImageUtil {
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public static void main(String[] args) throws Exception {
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byte[] imageBytes = getImageBytes("C:\\Users\\cy\\Pictures\\营业执照\\111.jpg");
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System.out.println(imageBytes.length);
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}
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public static byte[] getImageBytes(String imagePath) throws Exception {
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// 读取图片文件
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BufferedImage bufferedImage = ImageIO.read(new File(imagePath));
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// 将图片写入字节流
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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ImageIO.write(bufferedImage, "jpg", baos);
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// 返回字节数组
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return baos.toByteArray();
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}
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//
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// /*
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// * @Author : liu.q [916000612@qq.com]
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// * @Date : 2019-04-24 12:55
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// * @param OldInputStream : 原图
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// * @param w : 宽
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// * @param h : 高
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// * @param quality : 质量
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// * @return : InputStream 压缩后的图
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// * @Description :
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// */
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// public static InputStream ImgCompress(InputStream OldInputStream,String suffix,int w, int h, float quality) {
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// try {
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// /** 处理宽高 */
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// BufferedImage bufferedImage = ImageIO.read(OldInputStream);
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// int new_w = bufferedImage.getWidth(null);
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// int new_h = bufferedImage.getHeight(null);
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// if(new_w<=w || new_h<=h){//原图宽高小于要压缩的宽高就不压缩了。
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// return OldInputStream;
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// }
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// double bili;
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// if(w<=0 || h<=0){
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// if(w>0){
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// bili=(double)w/new_w;
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// new_h = (int) (new_h*bili);
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// new_w=w;
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// }else{
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// if(h>0){
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// bili=(double)h/new_h;
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// new_w = (int) (new_w*bili);
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// new_h=h;
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// }
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// }
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// }else{
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// new_w=w;
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// new_h=h;
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// }
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//
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// BufferedImage image_to_save = new BufferedImage(new_w, new_h,bufferedImage.getType());
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// image_to_save.getGraphics().drawImage(bufferedImage.getScaledInstance(new_w, new_h, Image.SCALE_SMOOTH), 0,0, null);
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// ImageWriter imageWriter = ImageIO.getImageWritersBySuffix(suffix).next();
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// IIOMetadata imageMetaData = imageWriter.getDefaultImageMetadata(new ImageTypeSpecifier(image_to_save), null);
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// //质量压缩
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// if (quality >= 0 && quality <= 1f) {
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// ImageWriteParam jpegParams = imageWriter.getDefaultWriteParam();
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// jpegParams.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
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// jpegParams.setCompressionQuality(quality);
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// }
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// //写入图片
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// imageWriter.write(imageMetaData,new IIOImage(image_to_save, null, null), null);
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// imageWriter.dispose();
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//
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// return imageWriter;
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// } catch (IOException ex) {
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// ex.printStackTrace();
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// }
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// }
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}
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