每当我启动我的程序时,我都会在我的控制台中得到这个:
java.net.MalformedURLException: no protocol: /test.mp3
代码:
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class MP3Fetcher implements Runnable {
public URL[] mp3Files = new URL[100];
public void load() {
(new Thread(new MP3Fetcher())).start();
}
public void getMp3Files() throws MalformedURLException {
mp3Files[0] = new URL("http://regicide.ucoz.com/test.mp3");
mp3Files[1] = new URL("http://regicide.ucoz.com/test2.mp3");
}
public void fetchMp3Files() throws MalformedURLException, IOException {
for (int i = 0; i < mp3Files.length; i++) {
if (mp3Files[i] != null) {
if (!mp3Exists(i)) {
saveFile(MP3Engine.MP3_LOCATION + "sound" + i + ".mp3",
mp3Files[i].getFile());
}
}
}
}
public static boolean mp3Exists (int id) {
File mp3 = new File(MP3Engine.MP3_LOCATION + "sound" + id + ".mp3");
return mp3.exists();
}
public void saveFile(String filename, String urlString) throws MalformedURLException, IOException {
URL url;
URLConnection con;
DataInputStream dis;
FileOutputStream fos;
byte[] fileData;
try {
url = new URL(urlString); // File Location goes here
con = url.openConnection(); // open the url connection.
dis = new DataInputStream(con.getInputStream());
fileData = new byte[con.getContentLength()];
for (int q = 0; q < fileData.length; q++) {
fileData[q] = dis.readByte();
}
dis.close(); // close the data input stream
fos = new FileOutputStream(new File(
filename)); // FILE Save
// Location
// goes here
fos.write(fileData); // write out the file we want to save.
fos.close(); // close the output stream writer
} catch (Exception m) {
System.out.println(m);
}
}
public void run() {
try {
getMp3Files();
fetchMp3Files();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
我能做些什么来解决这个问题?
我尝试将 file:// 添加到我的文件路径,但没有奏效。这是我第一次在 Java 中使用文件下载。