package test;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

 

import javax.imageio.ImageIO;

 

public class ImageEncoderService {

 

    private static ImageEncoderService instance;

 

    private ImageEncoderService() {

        instance = this;

    }

 

    public static ImageEncoderService getInstance() {

        if (instance == null) {

            instance = new ImageEncoderService();

        }

        return instance;

    }

 

    /**

    public boolean narrowAndFormateTransfer(String srcPath, String destPath, int height, int width, String formate) {

        boolean flag = false;

        try {

            File file = new File(srcPath);

            File destFile = new File(destPath);

            if (!destFile.getParentFile().exists()) {

                destFile.getParentFile().mkdir();

            }

            BufferedImage src = ImageIO.read(file); // 读入文件

            Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT);

            BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

            Graphics g = tag.getGraphics();

            g.drawImage(image, 0, 0, null); // 绘制缩小后的图

            g.dispose();

            flag = ImageIO.write(tag, formate, new FileOutputStream(destFile));// 输出到文件流

        } catch (IOException e) {

            e.printStackTrace();

        }

        return flag;

    }

 

    public static void main(String[] args) {

        try {

            ImageEncoderService service = new ImageEncoderService();

            boolean flag = service.narrowAndFormateTransfer("E:\\\\我的图片/雨伞.jpg", "E:\\\\我的图片/雨伞.png", 400, 400, "png");

            System.out.println(flag);

        } catch (Exception e) {

            System.out.println(e);

        }

    }