
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;
} }
服务器端:
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();
} }