package com.dy.pipIrrWebFile.util;

import net.coobird.thumbnailator.Thumbnails;

import javax.imageio.ImageIO;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;

/**
 * 生成图片的缩略图
 */
public class ZipImg {
    public static InputStream zipToJpg(File file, int xSize, int ySize) throws Exception{
        return zip(file, "jpg", xSize, ySize) ;
    }

    public static InputStream zipToPng(File file, int xSize, int ySize) throws Exception{
        return zip(file, "png", xSize, ySize) ;
    }

    public static void zipToFile(File file, File toFile, int xSize, int ySize) throws Exception{
        Thumbnails.of(file).size(xSize, ySize).outputQuality(0.5f).toFile(toFile);//0f-1f 质量越高
    }


    private static InputStream zip(File file, String type, int xSize, int ySize) throws Exception{
        BufferedImage bi = Thumbnails.of(file).size(xSize, ySize).outputQuality(1f).asBufferedImage();
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        ImageIO.write(bi, type, os);
        InputStream in = new ByteArrayInputStream(os.toByteArray());
        bi = null ;
        os = null ;
        return in ;
    }
    
    public static void main(String[] args){
    	File f = new File("D:/test.jpg") ;
    	String name = f.getName() ;
    	String path = f.getPath() ;
    	System.out.println(name);
    	System.out.println(path);
    	
    	int index = path.lastIndexOf(".") ;
    	String s1 = path.substring(0, index) ;
    	String s2 = path.substring(index) ;
    	System.out.println(s1);
    	System.out.println(s2);
    	
    	String newFilePath = s1 + "_" + s2 ;
    	try {
    		InputStream input = zipToJpg(f, 400, 400) ;
    		new FileUtil().saveFile(newFilePath, input) ;
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }

}