package com.jingle.getlocal;

 import java.io.ByteArrayOutputStream;

 import java.io.InputStream;

 import org.apache.http.Header;

 import sun.misc.BASE64Encoder;

 import com.loopj.android.http.AsyncHttpClient;

 import com.loopj.android.http.AsyncHttpResponseHandler;

 import com.loopj.android.http.RequestParams;

 import android.app.Activity;

 import android.content.res.AssetManager;

 import android.graphics.Bitmap;

 import android.graphics.BitmapFactory;

 import android.os.Bundle;

 import android.util.Log;

 import android.view.View;

 import android.view.View.OnClickListener;

 import android.widget.Button;

 import android.widget.ImageView;

 public class MainActivity extends Activity {

     private String UPLOAD_URL = "http://192.168.1.101:8080/Login//servlet/UploadImg";

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         initImg();

         initBtnUploadImg();

     }

     private void initBtnUploadImg() {

         Button btn = (Button) findViewById(R.id.btn);

         btn.setOnClickListener(new OnClickListener() {

             public void onClick(View v) {

                 uploadImg();

             }

         });

     }

     private void uploadImg() {

         AsyncHttpClient client = new AsyncHttpClient();

         client.setTimeout(3000);

         RequestParams params = new RequestParams();

         //获取Bitmap对象

         Bitmap bmp = getImg("orca.jpg");

         //获取字节数组输出流

         ByteArrayOutputStream baos = new ByteArrayOutputStream();

         //压缩Bitmap对象到字节数组输出流

         bmp.compress(Bitmap.CompressFormat.JPEG, 90, baos);

         //将字节数组输出流转为字节数组

         byte[] ba = baos.toByteArray();

         //将字节数组编码成字符串

         String str = new BASE64Encoder().encode(ba);

         params.put("img", str);

         client.post(UPLOAD_URL, params, new AsyncHttpResponseHandler() {

             public void onSuccess(int arg0, Header[] arg1, byte[] arg2) {

                 Log.i("ace", "post ok..");

             }

             public void onFailure(int arg0, Header[] arg1, byte[] arg2,

                     Throwable arg3) {

                 arg3.printStackTrace();

             }

         });

     }

     private void initImg() {

         ImageView img = (ImageView) findViewById(R.id.img);

         img.setImageBitmap(getImg("orca.jpg"));//assets目录下文件名

     }

     //获取图片的Bitmap对象

     private Bitmap getImg(String file) {

         Bitmap bmp = null;

         //获取AssetsMng对象

         AssetManager am = getResources().getAssets();

         try {

             //打开文件,返回输入流

             InputStream is = am.open(file);

             //Bitmap工厂解码输入流,得到bmp对象

             bmp = BitmapFactory.decodeStream(is);

             is.close();

         } catch (Exception e) {

             e.printStackTrace();

         }

         return bmp;

     }

 }

 package action;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.OutputStream;

 import java.io.PrintWriter;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import sun.misc.BASE64Decoder;

 public class UploadImg extends HttpServlet {

     private static final long serialVersionUID = -8236824851962797021L;

     public void doGet(HttpServletRequest request, HttpServletResponse response)

             throws ServletException, IOException {

         response.setContentType("text/html");

         doPost(request, response);

     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)

             throws ServletException, IOException {

         System.out.println("do post..");

         String imgStr = request.getParameter("img");

         //将字符串解码为字节数组

         byte[] imgByte = new BASE64Decoder().decodeBuffer(imgStr);

         //新建文件输出流

         OutputStream os = new FileOutputStream("E:\\up.jpg");

         //输出流写入字节数组

         os.write(imgByte);

         os.close();

         PrintWriter out = response.getWriter();

         out.flush();

         out.close();

     }

 }