Android 网络连接异常

Android 网络连接错误
最近写了一个多线程下载的Android程序，但是不能正常运行，不能正常连接网络，什么原因？（ps：网络环境正常，可以上百度），代码如下：

	/*

	 * 开始正常下载

	 * 

	 */

	public  void download() throws Exception{


		downloadSave = new DownloadSave();


		forder = downloadSave.DirFile("Myfile");


		file = downloadSave.createFile("Myfile/QQ.exe");


		path = "http://dlsw.baidu.com/sw-search-sp/soft/3a/12350/QQ5.1.10055.0.1393407862.exe";


		URL url = new URL(path);


		HttpURLConnection conn = (HttpURLConnection)url.openConnection();


		conn.setConnectTimeout(6*1000);


		conn.setRequestMethod("GET");


		int filelength = conn.getContentLength();


		RandomAccessFile randomfile = new RandomAccessFile(file, "rw");


		randomfile.setLength(filelength);


		randomfile.close();


		conn.disconnect();


		int thread = 3;


		int threadlength = filelength%thread ==0 ? filelength/thread:filelength/thread+1;


		for(int i=0; i<thread; i++){


			int startposition = i * threadlength;


			RandomAccessFile threadfile = new RandomAccessFile(file,"rw");


			threadfile.seek(startposition);


			new DownloadThread(i, path, startposition,

					threadfile, threadlength).start();

		}

	}

public class DownloadThread extends Thread{



	private int threadid;

	private String path;

	private int startpositon;

	private RandomAccessFile file;

	private int filelength;


	public DownloadThread(int threadid, String path,int startpositon,

			RandomAccessFile file, int threadlength){


		this.threadid = threadid;

		this.path = path;

		this.startpositon = startpositon;

		this.file = file;

		this.filelength = threadlength;

	}


	@Override

	public void run() {

		// TODO Auto-generated method stub


			try {


				URL url = new URL(path);


				HttpURLConnection conn = (HttpURLConnection)url.openConnection();


				conn.setConnectTimeout(6*1000);


				conn.setRequestMethod("GET");


				conn.setRequestProperty("Range", "byte ="+startpositon+"-");			


				InputStream inputStream = conn.getInputStream();				


				byte[] data = new byte[1024];


				int len = 0;


				int length = 0;


				while(length< filelength&&(len=inputStream.read(data))!=-1){


					file.write(data,0,len);


					length += len;

				}


				inputStream.close();


				file.close();


				System.out.println("线程"+(threadid+1)+" over");


			} catch (Exception e) {

				// TODO Auto-generated catch block

				e.printStackTrace();

				System.out.println("线程"+(threadid+1)+" 出错");

			}



	}



}

错误log输出如下，我打印了一下conn.getResponseCode() = 403，貌似是死在InputStream inputStream = conn.getInputStream();这句了，但是到底是什么原因啊，求大神帮忙看一下
Android 网络连接异常

------解决思路----------------------
看代码好像无措，conn.setRequestProperty("Range", "byte ="+startpositon+"-");这句话是不是设置有问题，，，，
------解决思路----------------------

URL url = new URL(

                                    "http://192.168.191.104:8080/myapp/servlet/MyServlet");

                            HttpURLConnection connection = ((HttpURLConnection) url

                                    .openConnection());

                            connection.setDoInput(true);

                            connection.setDoOutput(true);

                            connection.setUseCaches(false);

                            connection.setRequestMethod("POST");

                            connection.connect();

                            OutputStream out = connection.getOutputStream();

                             

                            int len;

                            byte[] buffer = new byte[1024];

                            // 读取文件

                            FileInputStream fileInputStream = new FileInputStream(

                                    Environment.getExternalStorageDirectory()

                                            .getAbsolutePath()

                                            + "/123.jpg");

                            while((len = fileInputStream.read(buffer, 0, 1024)) != -1){

 

                                out.write(buffer);

                            }

     

                            out.flush();

                            out.close();

                            fileInputStream.close();

 

                            InputStream input = connection.getInputStream();

                            while ((len = input.read(buffer)) != -1) {

                                Log.i("tag", "data:"

                                        + new String(buffer, 0, len));

                            }

                            input.close();

                            connection.disconnect();

这是我写的，可以参考下，因为你那里设置conn属性，很少会用，我也不知道，感觉可能出错，，，
------解决思路----------------------
你这个问题找的我真苦啊，试了半个消失才发现原来错误在这里

http.setRequestProperty("Range", "bytes=" + startPos + "-"+ endPos);//设置获取实体数据的范围

这是正确写法应该是bytes，你少了了个s

Android 网络连接异常

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