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?????/**

?* 根據地址獲得數據的字節流

?*

?* @param strUrl

?*??????????? 網絡連接地址

?* @return

?*/

public?static?byte[] getImageFromNetByUrl(String strUrl) {

????try?{

????????URL url =?new?URL(strUrl);

????????HttpURLConnection conn = (HttpURLConnection) url.openConnection();

????????conn.setRequestMethod("GET");

????????conn.setConnectTimeout(5?*?1000);

????????InputStream inStream = conn.getInputStream();// 通過輸入流獲取圖片數據

????????byte[] btImg = readInputStream(inStream);// 得到圖片的二進制數據

????????return?btImg;

????}?catch?(Exception e) {

????????e.printStackTrace();

????}

????return?null;

}

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???/**

?* 根據地址獲得數據的字節流

?*

?* @param strUrl

?*??????????? 本地連接地址

?* @return

?*/

public?static?byte[] getImageFromLocalByUrl(String strUrl) {

????try?{

????????File imageFile =?new?File(strUrl);

????????InputStream inStream =?new?FileInputStream(imageFile);

????????byte[] btImg = readInputStream(inStream);// 得到圖片的二進制數據

????????return?btImg;

????}?catch?(Exception e) {

????????e.printStackTrace();

????}

????return?null;

}

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???/**

?* 從輸入流中獲取數據

?*

?* @param inStream

?*??????????? 輸入流

?* @return

?* @throws Exception

?*/

public?static?byte[] readInputStream(InputStream inStream)?throws?Exception {

????ByteArrayOutputStream outStream =?new?ByteArrayOutputStream();

????byte[] buffer =?new?byte[10240];

????int?len =?0;

????while?((len = inStream.read(buffer)) != -1) {

????????outStream.write(buffer,?0, len);

????}

????inStream.close();

????return?outStream.toByteArray();

}　　

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????????byte[] btImg1 = ImageUtil.getImageFromNetByUrl(fileUrl1);

if?(null?!= btImg1 && btImg1.length >?0) {

????logger.debug("讀取到："?+ btImg1.length +?" 字節");

????ImageUtil.writeImageToDisk(btImg1, fileZipUrl1);

}?else?{

????logger.debug("沒有從該連接獲得內容");

}

?

byte[] btImg2 = ImageUtil.getImageFromNetByUrl(fileUrl2);

if?(null?!= btImg2 && btImg2.length >?0) {

????logger.debug("讀取到："?+ btImg2.length +?" 字節");

????ImageUtil.writeImageToDisk(btImg2, fileZipUrl2);

}?else?{

????logger.debug("沒有從該連接獲得內容");

}

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/**

?* 將圖片寫入到磁盤

?*

?* @param img

?*??????????? 圖片數據流

?* @param fileName

?*??????????? 文件保存時的名稱

?*/

public?static?void?writeImageToDisk(byte[] img, String zipImageUrl) {

????try?{

????????File file =?new?File(zipImageUrl);

????????FileOutputStream fops =?new?FileOutputStream(file);

????????fops.write(img);

????????fops.flush();

????????fops.close();

????????System.out.println("圖片已經寫入"+zipImageUrl);

????}?catch?(Exception e) {

????????e.printStackTrace();

????}

}

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import?java.io.*;?

import?java.util.Date;?

import?java.awt.*;?

import?java.awt.image.*;?

import?javax.imageio.ImageIO;?

import?com.sun.image.codec.jpeg.*;?

/**

?* 圖片壓縮處理

?*/?

public?class?ImgCompress {?

????private?Image img;?

????private?int?width;?

????private?int?height;??

????/**

?????* 構造函數

?????*/?

????public?ImgCompress(String fileName)?throws?IOException {?

????????File file =?new?File(fileName);// 讀入文件?

????????img = ImageIO.read(file);??????// 構造Image對象?

????????width = img.getWidth(null);????// 得到源圖寬?

????????height = img.getHeight(null);??// 得到源圖長?

????}?

????/**

?????* 按照寬度還是高度進行壓縮

?????* @param w int 最大寬度

?????* @param h int 最大高度

?????*/?

????public?void?resizeFix(int?w,?int?h)?throws?IOException {?

????????if?(width / height > w / h) {?

????????????resizeByWidth(w);?

????????}?else?{?

????????????resizeByHeight(h);?

????????}?

????}?

????/**

?????* 以寬度為基準，等比例放縮圖片

?????* @param w int 新寬度

?????*/?

????public?void?resizeByWidth(int?w)?throws?IOException {?

????????int?h = (int) (height * w / width);?

????????resize(w, h);?

????}?

????/**

?????* 以高度為基準，等比例縮放圖片

?????* @param h int 新高度

?????*/?

????public?void?resizeByHeight(int?h)?throws?IOException {?

????????int?w = (int) (width * h / height);?

????????resize(w, h);?

????}?

????/**

?????* 強制壓縮/放大圖片到固定的大小

?????* @param w int 新寬度

?????* @param h int 新高度

?????*/?

????public?void?resize(int?w,?int?h)?throws?IOException {?

????????// SCALE_SMOOTH 的縮略算法 生成縮略圖片的平滑度的 優先級比速度高 生成的圖片質量比較好 但速度慢?

????????BufferedImage image =?new?BufferedImage(w, h,BufferedImage.TYPE_INT_RGB );??

????????image.getGraphics().drawImage(img,?0,?0, w, h,?null);?// 繪制縮小后的圖?

????????File destFile =?new?File("C:/Users/Administrator/Desktop/147.jpg");?

????????FileOutputStream out =?new?FileOutputStream(destFile);?// 輸出到文件流?

????????// 可以正常實現bmp、png、gif轉jpg?

????????JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);?

????????encoder.encode(image);?// JPEG編碼?

????????out.close();?

????}

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@SuppressWarnings("deprecation")?

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

????System.out.println("開始："?+?new?Date().toLocaleString());?

????ImgCompress imgCom =?new??ImgCompress("C:/Users/Administrator/Desktop/1479209533362.jpg");?

????imgCom.resizeFix(285,?380);?

????System.out.println("結束："?+?new?Date().toLocaleString());?

}

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}