url pdf下載
package cn.saigu.wuliu2;
import java.io.*;
import java.net.*;
public class DownloadPdf {
/**
* 從網絡Url中下載文件
* @param urlStr
* @param fileName
* @param savePath
* @throws IOException
*/
public static void downLoadByUrl(String urlStr,String fileName,String savePath) throws IOException{
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setConnectTimeout(5*1000);
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
InputStream inputStream = conn.getInputStream();
byte[] getData = readInputStream(inputStream);
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");
}
/**
* 從輸入流中獲取字節數組
* @param inputStream
* @return
* @throws IOException
*/
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();
}
/**
* 測試ok
* @param args
*/
public static void main(String[] args) {
try{
downLoadByUrl("http://82.160.17.218:9090/DHLDE/label/00340434185102649156.pdf",
"ELISA.pdf","E:/upload");
}catch (Exception e) {
}
}
}