package com.zhao.test.util;

import java.awt.image.BufferedImage;

import java.io.File;

import java.util.Iterator;

import javax.imageio.IIOImage;

import javax.imageio.ImageIO;

import javax.imageio.ImageWriteParam;

import javax.imageio.ImageWriter;

import javax.imageio.stream.ImageOutputStream;

/**

* 转换图片为 流式加载

* @author zhaosx

*

*/

public class ProgressiveJPEG {

public static void main(String[] args) throws Exception {

File file=new File("Z:/2.jpg");

BufferedImage image = ImageIO.read(file);

Iterator<ImageWriter> it = ImageIO.getImageWritersByFormatName("jpeg");

ImageWriter writer=null;

while(it.hasNext()) {

writer=it.next();

break;

//System.out.println(it.next());

}

if(writer!=null) {

ImageWriteParam params = writer.getDefaultWriteParam();

params.setProgressiveMode(ImageWriteParam.MODE_DEFAULT);

//params.setCompressionQuality(0.8f);

ImageOutputStream output = ImageIO.createImageOutputStream(new File("Z:/22.jpg"));

writer.setOutput(output);

writer.write(null,new IIOImage(image,null,null), params);

output.flush();

writer.dispose();

System.out.println("ok");

}

}

}