Posted on 2009-07-22 19:59
波波^_^ 閱讀(1187)
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使用HttpClient下載文件主要還是文件流的轉化的東西比較煩一點。httpclient的東西比較簡單的
引用
需要有的Jar;
* commons-httpclient-3.1.jar
* commons-logging-1.04.jar
* commons-codec-1.3.jar
- public class HttpClientTest {
-
- private final static String REMOTE_FILE_URL = "http://www.gjt.org/download/time/java/tar/javatar-2.5.tar.gz";
-
- private final static int BUFFER = 1024;
-
- public static void main(String[] args) {
-
- HttpClient client = new HttpClient();
- GetMethod httpGet = new GetMethod(REMOTE_FILE_URL);
- try {
- client.executeMethod(httpGet);
-
- InputStream in = httpGet.getResponseBodyAsStream();
-
- FileOutputStream out = new FileOutputStream(new File("E:\\test_jar\\javatar-2.5.tar.gz"));
-
- byte[] b = new byte[BUFFER];
- int len = 0;
- while((len=in.read(b))!= -1){
- out.write(b,0,len);
- }
- in.close();
- out.close();
-
- }catch (HttpException e){
- e.printStackTrace();
- } catch (IOException e) {
- e.printStackTrace();
- }finally{
- httpGet.releaseConnection();
- }
- System.out.println("download, success!!");
- }
- }
public class HttpClientTest {
private final static String REMOTE_FILE_URL = "http://www.gjt.org/download/time/java/tar/javatar-2.5.tar.gz";
private final static int BUFFER = 1024;
public static void main(String[] args) {
HttpClient client = new HttpClient();
GetMethod httpGet = new GetMethod(REMOTE_FILE_URL);
try {
client.executeMethod(httpGet);
InputStream in = httpGet.getResponseBodyAsStream();
FileOutputStream out = new FileOutputStream(new File("E:\\test_jar\\javatar-2.5.tar.gz"));
byte[] b = new byte[BUFFER];
int len = 0;
while((len=in.read(b))!= -1){
out.write(b,0,len);
}
in.close();
out.close();
}catch (HttpException e){
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
httpGet.releaseConnection();
}
System.out.println("download, success!!");
}
}
這個文章主要是參考自
http://www.hr.utah.edu/blog/2006/03/03/file-download-using-jakarta-commons-httpclient/
使用了緩沖，避免了IO的頻繁讀寫。
還有一篇
http://weifly.javaeye.com/blog/145457
直接使用byte[]數組，比較便捷，但是沒有使用緩沖，因為頻繁的讀寫，看下來下載速度很慢。