2、將目錄中的所有的圖片打包成zip包
3、刪除原來的目錄
4、下載zip包
1:由於網頁上的圖片是全部都是連接動態生成的,所以同事在網上找了一個下載動態連接的圖片的方法。
/**
* @param urlAdd (url地址,及網頁中的動態鏈接的地址)
* @param fileName(生成文件的名稱)
* @throws uploadDir(生成到服務器端指定的目錄)
*/
public static void createImage(String urlAdd, String fileName, String uploadDir) throws Exception {
URL url = new URL(urlAdd);
Image src = javax.imageio.ImageIO.read(url); // 構造Image對象
int wideth = src.getWidth(null); // 得到源圖寬
int height = src.getHeight(null); // 得到源圖長
BufferedImage tag = new BufferedImage(wideth, height, BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(src, 0, 0, wideth, height, null); // 繪製縮小後的圖
FileOutputStream out = new FileOutputStream(uploadDir.concat(fileName).concat(".jpg")); // 輸出到文件流
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(tag); // 近JPEG編碼
out.close();
}
改進後的方法,以上方法如果是png或者gif圖片會失真,改進後方法:
/**
* @param urlAdd (url地址,及網頁中的動態鏈接的地址)
* @param fileName(生成文件的名稱)
*/
public static void createImage(String imgurl, String filePath) throws Exception {
URL url = new URL(imgurl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
InputStream inputStream = conn.getInputStream(); // 通過輸入流獲得圖片數據
byte[] getData = readInputStream(inputStream); // 獲得圖片的二進制數據
File imageFile = new File(filePath);
FileOutputStream fos = new FileOutputStream(imageFile);
fos.write(getData);
fos.close();
}
public static void main(String[] args) throws Exception {
// String imgurl = "http://www.dabaoku.com/gif/152/gif001.gif";
String imgurl = "http://www.52design.com/pic/20128/201286141927725.png";
String suffix = FilenameUtils.getExtension(imgurl);
String uuid = UUID.randomUUID().toString();
String filePath = "c:\\" + uuid + "." + suffix;
GetWebImg.createImage(imgurl, filePath);
System.out.println(" read picture success:");
}
public static byte[] readInputStream(InputStream inputStream) throws IOException {
byte[] buffer = new byte[1024];
int len = 0;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
while ((len = inputStream.read(buffer)) != -1) {
bos.write(buffer, 0, len);
}
bos.close();
return bos.toByteArray();
}
說明:如果你是想從抓取網頁的信息中分析圖片,可以參考我的文章:
點擊查看:java無損水印、動態抓取文章以及下載文章內部圖片
2:打包指定的目中的文件爲zip包。其中解決了文件中文亂碼的問題,引入一個jar包truezip-6.6.jar ,可以到http://download.csdn.net/source/1076475下載
/**
* @param inputFileName
* @param zipFileName
* @throws Exception
*/
public static void zip(String inputFileName, String zipFileName) throws Exception {
zip(zipFileName, new File(inputFileName));
}
public static void zip(String zipFileName, File inputFile) throws Exception {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName), "GBK");
zip(out, inputFile, "");
// System.out.println("zip done");
out.close();
}
public static void zip(ZipOutputStream out, File f, String base) throws Exception {
if (f.isDirectory()) {
File[] fl = f.listFiles();
out.putNextEntry(new ZipEntry(base + "/"));
base = base.length() == 0 ? "" : base + "/";
for (int i = 0; i < fl.length; i++) {
zip(out, fl[i], base + fl[i].getName());
}
} else {
out.putNextEntry(new ZipEntry(base));
FileInputStream in = new FileInputStream(f);
int b;
// System.out.println(base);
while ((b = in.read()) != -1) {
out.write(b);
}
in.close();
}
}