package com.qxueyou.scc.base.util;
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import java.awt.Graphics2D;
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import java.awt.Image;
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import java.awt.RenderingHints;
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import java.awt.geom.Ellipse2D;
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import java.awt.geom.Rectangle2D;
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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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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.net.URL;
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import javax.imageio.ImageIO;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import sun.misc.BASE64Encoder;
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@SuppressWarnings("restriction")
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public class ImageUtils {
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private static Logger log = LogManager.getLogger("ImageUtils");
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public static void doBeautiful(File file) {
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try {
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BufferedImage bi1 = ImageIO.read(file);
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Ellipse2D.Double shapeEllipse = new Ellipse2D.Double(0, 0, Math.min(bi1.getWidth(),bi1.getHeight()),
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Math.min(bi1.getWidth(),bi1.getHeight()));
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// 设置透明背景
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BufferedImage bi2 = new BufferedImage(bi1.getWidth(),
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bi1.getHeight(), BufferedImage.TRANSLUCENT);
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Graphics2D g2 = bi2.createGraphics();
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g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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g2.setClip(shapeEllipse);
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// 画图片
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g2.drawImage(bi1, 0, 0, null);
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g2.dispose();
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ImageIO.write(bi2, "PNG", file);
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} catch (IOException e) {
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log.error("图片处理失败", e);
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}
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}
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//矩形头像
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public static void doRectangle(File file){
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try {
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BufferedImage bi1 = ImageIO.read(file);
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Rectangle2D.Double shapeRectangle = new Rectangle2D.Double(0, 0, Math.min(bi1.getWidth(),bi1.getHeight()),
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Math.min(bi1.getWidth(),bi1.getHeight()));
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// 设置透明背景
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BufferedImage bi2 = new BufferedImage(bi1.getWidth(),
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bi1.getHeight(), BufferedImage.TRANSLUCENT);
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Graphics2D g2 = bi2.createGraphics();
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g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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g2.setClip(shapeRectangle);
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// 画图片
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g2.drawImage(bi1, 0, 0, null);
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g2.dispose();
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ImageIO.write(bi2, "PNG", file);
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} catch (IOException e) {
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log.error("图片处理失败", e);
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}
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}
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/**
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* 为图片生成缩略图
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* @param file
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*/
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public static void decreaseSizeImage(File file) {
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try {
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BufferedImage bi1 = ImageIO.read(file);
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int width = bi1.getWidth();
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int height = bi1.getHeight();
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// 设置透明背景
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BufferedImage bi2 = new BufferedImage(getPriviewImageWidth(width,height),
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getPriviewImageHeight(width,height), bi1.getType());
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Graphics2D g2 = bi2.createGraphics();
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// 画图片
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Image image = bi1.getScaledInstance(getPriviewImageWidth(width,height), getPriviewImageHeight(width,height), Image.SCALE_DEFAULT);
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g2.drawImage(image, 0, 0, null);
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g2.dispose();
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ImageIO.write(bi2, "PNG", createPreviewFile(file));
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} catch (IOException e) {
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log.error("图片处理失败", e);
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}
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}
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public static File createPreviewFile(File f){
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return new File(f.getParentFile().getAbsolutePath().concat("/pre_").concat(f.getName()));
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}
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private static int getPriviewImageWidth(int width,int height){
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double wid = width;
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double hei = height;
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double ratioWid = wid / 120;
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double ratioHeight = hei / 160;
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if(ratioWid >= ratioHeight){
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return 120;
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}else{
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return (int) (wid/ratioHeight);
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}
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}
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private static int getPriviewImageHeight(int width,int height){
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double wid = width;
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double hei = height;
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double ratioWid = wid / 120;
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double ratioHeight = hei / 160;
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if(ratioWid >= ratioHeight){
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return (int) (hei/ratioWid);
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}else{
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return 160;
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}
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}
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public static String encodeImgageToBase64(String imgStr) { // 将图片文件转化为字节数组字符串，并对其进行Base64编码处理
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ByteArrayOutputStream outputStream = null;
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try {
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URL imageUrl= new URL(imgStr);
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BufferedImage bufferedImage = ImageIO.read(imageUrl);
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outputStream = new ByteArrayOutputStream();
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ImageIO.write(bufferedImage, "jpg", outputStream);
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} catch (MalformedURLException e1) {
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e1.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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// 对字节数组Base64编码
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BASE64Encoder encoder = new BASE64Encoder();
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return encoder.encode(outputStream.toByteArray());// 返回Base64编码过的字节数组字符串
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}
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public static void main(String[] args){
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doRectangle(new File("C:/Users/Public/Pictures/Sample Pictures/desert.jpg"));
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}
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}
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