android访问服务器端上传及服务器端接收

最近在做一个android名片管理系统的demo，主要功能是与服务器端通信上传及下载数据。

android访问服务器端下载基本没什么问题，但是android上传到服务器遇到瓶颈。

android上传文件以数据流的形式上传，所以采用模拟http请求将文件以数据流的形式上传到服务器端，代码如下：

import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import android.app.Activity;import android.os.Bundle;import android.os.Environment;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class mainActivity extends Activity {  /*   * 变量声明 filename：上传后在服务器上的文件名称 uploadFile：要上传的文件路径 actionUrl：服务器上对应的程序路径   */  private String srcPath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator+"download"+  File.separator+"tilocal.jpeg";    private String newName = "tilocal.jpeg";  //要上传的本地文件路径  private String uploadFile = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator+"download"+  File.separator+"tilocal.jpeg";  //上传到服务器的指定位置(废弃，在uploadFile方法中写访问服务器路径)  //private String actionUrl = "http://192.168.3.10:8080//android/customer/upLoad.action";

  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.mTextView1);    mTextView1.setText("FilePath：/n " + uploadFile);    mTextView2 = (TextView) findViewById(R.id.mTextView2);    //mTextView2.setText("UploadPath：/n " + actionUrl);    /* 设定mButton的onClick事件处理 */    mButton1 = (Button) findViewById(R.id.mButton1);    mButton1.setOnClickListener(new View.OnClickListener()    {      public void onClick(View v)      {      uploadFile();      }    });  }private void uploadFile() {        String uploadUrl = "http://10.0.2.2:8080/upLoadFile/servlet/UpLoadFile";    String end = "\r\n";    String twoHyphens = "--";    String boundary = "******";    try {    URL url = new URL(uploadUrl);    HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();    httpURLConnection.setDoInput(true);    httpURLConnection.setDoOutput(true);    httpURLConnection.setUseCaches(false);    httpURLConnection.setRequestMethod("POST");    httpURLConnection.setRequestProperty("Connection", "Keep-Alive");    httpURLConnection.setRequestProperty("Charset", "UTF-8");    httpURLConnection.setRequestProperty("Content-Type","multipart/form-data;boundary=" + boundary);        DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());    dos.writeBytes(twoHyphens + boundary + end);    dos.writeBytes("Content-Disposition: form-data; name=\"file\"; filename=\""    + srcPath.substring(srcPath.lastIndexOf("/") + 1) + "\"" + end);    dos.writeBytes(end);        FileInputStream fis = new FileInputStream(srcPath);    byte[] buffer = new byte[8192]; // 8k    int count = 0;    while ((count = fis.read(buffer)) != -1) {    dos.write(buffer, 0, count);    }  Log.e("", dos.size()+"----------");  fis.close();        dos.writeBytes(end);    dos.writeBytes(twoHyphens + boundary + twoHyphens + end);    dos.flush();        InputStream is = httpURLConnection.getInputStream();    InputStreamReader isr = new InputStreamReader(is, "utf-8");    BufferedReader br = new BufferedReader(isr);    String result = br.readLine();        Toast.makeText(this, result, Toast.LENGTH_LONG).show();    dos.close();    is.close();        } catch (Exception e) {    e.printStackTrace();    setTitle(e.getMessage());    }        }    }

以上代码为android模拟http协议上传文件，以数据流的形式上传。

下面为服务器端servlet接收代码：

import java.io.FileOutputStream;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.ServletInputStream;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;

public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//获取输入流，是HTTP协议中的实体内容ServletInputStream  in=request.getInputStream();//缓冲区byte buffer[]=new byte[1024];//写入服务器端固定路径磁盘中FileOutputStream out=new FileOutputStream("F:\\upload\\zzz.jpeg");int len=in.read(buffer, 0, 1024);//把流里的信息循环读入到file文件中System.out.println(len+"+++++++++++++");while( len!=-1 ){System.out.println(len+"----------");out.write(buffer, 0, len);len=in.readLine(buffer, 0, 1024);}out.close();in.close();}

以上代码为粗糙的实现了android客户端与服务器端文件的上传功能。

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