java中的UrlHttp下载出问题了。。高手来。

想用java实现下从网络上下载一首稻香MP3.写了下面的代码。。可是总是下载到中途就不动了。。但程序中显示还在读取；并没有抛异常。。地址资源没问题。用迅雷可以下载；把代码贴出来大家给瞧瞧哪里出错了？？

import java.net.*;
import java.util.*;
import java.io.*;

public class Text {
public String getURl() {
URL url = null;
HttpURLConnection uc = null;
BufferedReader bf = null;
final int len = 0;
byte[] buff = new byte[len];
String message = "";
String temp = "";
int len1 = -1;
String urlStr = " http://cdn1-20.projectplaylist.com/e1/files/cdn7/mp3_new/2584535.mp3";

try {
url = new URL(urlStr);
System.out.println("开启连接之前" + new Date());
uc = (HttpURLConnection) url.openConnection();
bf = new BufferedReader(new InputStreamReader(uc.getInputStream()));
System.out.println("接受到读入流成功：" + new Date());
while ((temp = bf.readLine()) != null) {
System.out.println("正在下载.......");
System.out.println(new Date());
message += temp;

}
System.out.println("接受数据完毕！！！" + new Date());
} catch (MalformedURLException e) {

e.printStackTrace();
} catch (IOException e) {

e.printStackTrace();
} finally {
if (bf != null) {
try {
bf.close();
} catch (IOException e) {
bf = null;
e.printStackTrace();
}

}
}
return message;
}
public void writeWebText(String context)
{
FileWriter fw = null;
try {
fw = new FileWriter("d:\\a.txt");
fw.write(context, 0, context.length());
} catch (IOException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}finally
{
if (fw!=null) {
try {
fw.close();
} catch (IOException e) {
fw=null;
e.printStackTrace();
}
}
}

}

public static void main(String[] args) {

Text t = new Text();

t.writeWebText(t.getURl());
System.out.println("写入完毕！！");
}

}

package download;

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;

public class Download {

private static int BUFFER_SIZE = 8096; // 缓冲区大小

public static void main(String[] args) throws Exception {

String urlStr = " http://cdn1-20.projectplaylist.com/e1/files/cdn7/mp3_new/2584535.mp3";
String fileName = "d:\\a.mp3";
Download down = new Download();
down.saveToFile(urlStr, fileName);
}

public void saveToFile(String urlStr, String fileName) throws IOException {
FileOutputStream fos = null;
BufferedInputStream bis = null;
HttpURLConnection httpUrl = null;
URL url = null;
byte[] buf = new byte[BUFFER_SIZE];
int size = 0;

// 建立链接
url = new URL(urlStr);
httpUrl = (HttpURLConnection) url.openConnection();
// 连接指定的资源
httpUrl.connect();
// 获取网络输入流
bis = new BufferedInputStream(httpUrl.getInputStream());
// 建立文件
fos = new FileOutputStream(fileName);

System.out.println("正在获取链接[" + urlStr + "]的内容...\n将其保存为文件[" + fileName
+ "]");
// 保存文件
while ((size = bis.read(buf)) != -1){
fos.write(buf, 0, size);
System.out.println("正在下载.......");
}
System.out.println("下载成功！");
fos.close();
bis.close();
httpUrl.disconnect();
}
}

用BufferReader就不对了,既然得到了inputStream,直接写到一个FileOutputStream里就能解决问题,以下贴出部分代码

OutputStream os = new FileOutputStream("你的存放路径");

BufferedOutStream bos = new BufferedOutStream(os);

//uc对象是你上面的内容

BufferedInputStream bis = new BufferedInputStream(uc.getInputStream());

int bytesRead = 0;

byte[] buffer = new byte[8192]; while ((bytesRead = bis.read(buffer, 0, 8192)) != -1) {

System.out.println("已读取:"+bytesRead); bos.write(buffer, 0, bytesRead); }