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package Itxm.download;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.URL;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import sun.www.protocol.http.HttpURLConnection;
public class Itxm{
public static void main(String[] args) throws IOException {
downLoadFromUrl("http://222.222.12.186:8082/picResource/doctorVideo/video/ddbai.mp4", "ddbai", "D://");
}
public static void downLoadFromUrl(String urlStr,String fileName,String savePath) throws IOException{
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置超时间为3秒
conn.setConnectTimeout(3*1000);
//防止屏蔽程序抓取而返回403错误
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
//得到输入流
InputStream inputStream = conn.getInputStream();
//获取自己数组
byte[] getData = readInputStream(inputStream);
//文件保存位置
File saveDir = new File(savePath);
if(!saveDir.exists()){
saveDir.mkdir();
}
File file = new File(saveDir+File.separator+fileName);
FileOutputStream fos = new FileOutputStream(file);
fos.write(getData);
if(fos!=null){
fos.close();
}
if(inputStream!=null){
inputStream.close();
}
System.out.println("info:"+url+" download success");
}
private 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();
}
public static void downLoadFile(String filePath,HttpServletResponse response) {
File file = null;
DataInputStream dis = null;
ServletOutputStream out = null;
try {
file = new File(filePath);
if (!file.exists()) {
System.out.println("没有找到资源");
return;
}
out = response.getOutputStream();
FileInputStream fis = new FileInputStream(file);
dis = new DataInputStream(fis);
int len = (int) file.length();
byte[] buffer = new byte[len];
try {
dis.readFully(buffer);
} catch (IOException e) {
} finally {
if (dis != null) {
try {
dis.close();
} catch (IOException e) {
}
}
}
try {
out.write(buffer);
out.flush();
} catch (IOException e) {
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
}
}
}
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
}
public boolean deleteFile(String sPath) {
Boolean flag = false;
File file = new File(sPath);
// 路径为文件且不为空则进行删除
if (file.isFile() && file.exists()) {
file.delete();
flag = true;
}
return flag;
}
}
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