android实现文件上传功能

public class MainActivity extends Activity

{

  private String newName = "htys.mp3";

  //要上传的本地文件路径

  private String uploadFile = "/data/data/com.xzq/htys.mp3";

  //上传到服务器的指定位置

  private String actionUrl = "http://192.168.100.100:8080/upload/upload.jsp";

  private TextView mTextView1;

  private TextView mTextView2;

  private Button mButton1;

  @Override

  public void onCreate(Bundle savedInstanceState)

  {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    mTextView1 = (TextView) findViewById(R.id.myText2);

    mTextView1.setText("FilePath：/n" + uploadFile);

    mTextView2 = (TextView) findViewById(R.id.myText3);

    mTextView2.setText("UploadPath：/n" + actionUrl);

    /* 设定mButton的onClick事件处理 */

    mButton1 = (Button) findViewById(R.id.myButton);

    mButton1.setOnClickListener(new View.OnClickListener()

    {

      public void onClick(View v)

      {

        uploadFile();

      }

    });

  }

  private void uploadFile()

  {

    String end = "/r/n";

    String Hyphens = "--";

    String boundary = "*****";

    try

    {

      URL url = new URL(actionUrl);

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

      /* 允许Input、Output，不使用Cache */

      con.setDoInput(true);

      con.setDoOutput(true);

      con.setUseCaches(false);

      /* 设定传送的method=POST */

      con.setRequestMethod("POST");

      /* setRequestProperty */

      con.setRequestProperty("Connection", "Keep-Alive");

      con.setRequestProperty("Charset", "UTF-8");

      con.setRequestProperty("Content-Type",

          "multipart/form-data;boundary=" + boundary);

      /* 设定DataOutputStream */

      DataOutputStream ds = new DataOutputStream(con.getOutputStream());

      ds.writeBytes(Hyphens + boundary + end);

      ds.writeBytes("Content-Disposition: form-data; "

          + "name=/"file1/";filename=/"" + newName + "/"" + end);

      ds.writeBytes(end);

      /* 取得文件的FileInputStream */

      FileInputStream fStream = new FileInputStream(uploadFile);

      /* 设定每次写入1024bytes */

      int bufferSize = 1024;

      byte[] buffer = new byte[bufferSize];

      int length = -1;

      /* 从文件读取数据到缓冲区 */

      while ((length = fStream.read(buffer)) != -1)

      {

        /* 将数据写入DataOutputStream中 */

        ds.write(buffer, 0, length);

      }

      ds.writeBytes(end);

      ds.writeBytes(Hyphens + boundary + Hyphens + end);

      fStream.close();

      ds.flush();

      /* 取得Response内容 */

      InputStream is = con.getInputStream();

      int ch;

      StringBuffer b = new StringBuffer();

      while ((ch = is.read()) != -1)

      {

        b.append((char) ch);

      }

      System.out.println("上传成功");

      Toast.makeText(MainActivity.this, "上传成功", Toast.LENGTH_LONG)

          .show();

      ds.close();

    } catch (Exception e)

    {

      System.out.println("上传失败" + e.getMessage());

      Toast.makeText(MainActivity.this, "上传失败" + e.getMessage(),

          Toast.LENGTH_LONG).show();

    }

  }

}