Android上传图片到本地服务器

先把客户端代码给贴上

package com.example.administrator.myapplication;import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.provider.MediaStore;import android.support.v7.app.ActionBarActivity;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.text.SimpleDateFormat;import java.util.Date;import java.util.UUID;public class SecondActivity extends ActionBarActivity {    private Button photoButton = null;    private Button uploadButton = null;    private ImageView imageView = null;    private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;    private static final int MEDIA_TYPE_IMAGE = 1;    private static final String LOG_TAG = "CameraActivity";    private Uri fileUri = null;    public static File mediaFile;    private Handler handler;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_second);        photoButton = (Button) findViewById(R.id.photoButton);        uploadButton = (Button) findViewById(R.id.uploadButton);        imageView = (ImageView) findViewById(R.id.imageView);        TakePicListener captureListener = new TakePicListener();        photoButton.setOnClickListener(captureListener);        UploadListener ul = new UploadListener();        uploadButton.setOnClickListener(ul);        handler = new Handler() {            @Override            public void handleMessage(Message msg) {                String result = msg.obj.toString();                if (result.equals(FileImageUpload.SUCCESS)) {                    Toast.makeText(SecondActivity.this, "上传成功!", Toast.LENGTH_SHORT).show();                } else if (result.equals(FileImageUpload.FAILURE)) {                    Toast.makeText(SecondActivity.this, "上传失败!!", Toast.LENGTH_SHORT).show();                }            }        };    }    //监听拍照    class TakePicListener implements View.OnClickListener {        @Override        public void onClick(View v) {            System.out.println("Take picture Button Click");            //调用系统自带的相机            Intent takePic = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);            fileUri = Uri.fromFile(getOutPutMediaFile(MEDIA_TYPE_IMAGE));            //下面这段使得照片存储到指定的位置            takePic.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);            //跳转到系统相机，并且返回相片数据，在OnActivityForResult方法中处理数据            startActivityForResult(takePic, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);        }    }    //监听上传    class UploadListener implements View.OnClickListener {        @Override        public void onClick(View v) {            System.out.println("Upload Button clicked!");            //文件上传需要消耗很多时间，需要在WorkerThread中进行，否则UI线程会阻塞            UploadThread ut = new UploadThread(mediaFile);            ut.start();        }    }    //新建一个WorkerThread，在uploadButton中要连接服务器,不能在UI线程中连接    class UploadThread extends Thread {        //需要上传的文件        private File mUploadFile;        public UploadThread(File file) {            this.mUploadFile = file;        }        @Override        public void run() {            String flag = FileImageUpload.uploadFile(mUploadFile.getName());            Message msg = handler.obtainMessage();            msg.obj = flag;            handler.sendMessage(msg);            }        }        private File getOutPutMediaFile(int type) {            //检查sd卡状态            String sdStatus = Environment.getExternalStorageState();            if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) {                System.out.println("SD Card is not available!");                return null;            }            File mediaStorageDir = null;            try {                //在sd卡目录下面新建一个文件夹                mediaStorageDir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/MyPicture");                System.out.println("Successfully created mediaStorageDir: " + mediaStorageDir);            } catch (Exception e) {                e.printStackTrace();                System.out.println("Error int Creating mediaStorageDir: " + mediaStorageDir);            }            //检查目录是否创建成功            if (!mediaStorageDir.exists()) {                if (!mediaStorageDir.mkdirs()) {                    //在sd卡上穿件目录需要权限                    System.out.println("failed to create directory, check if you have the WRITE_EXTERNAL_STORAGE permission");                    return null;                }            }            //创建图片名字，图片名字不要太长，原因不明。。。            String timeStamp = new SimpleDateFormat("hhmmss").format(new Date());            //在mediaStorageDir目录下创建图片文件            mediaFile = new File(mediaStorageDir.getPath() + File.separator + "image" + timeStamp + ".jpg");            System.out.println("图片存放地址: " + mediaFile.getAbsolutePath());            return mediaFile;        }        /**         *         * @param requestCode 可以根据这个requestCode知道是哪个东西（例如拍照或者录像）请求数据         * @param resultCode 请求是否成功         * @param data       返回的数据         */        @Override        protected void onActivityResult(int requestCode, int resultCode, Intent data) {            super.onActivityResult(requestCode, resultCode, data);            Log.d(LOG_TAG, "onActivityResult: requestCode: " + requestCode + " ,resultCode: "                    + resultCode);            if (CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE == requestCode) {                if (resultCode == Activity.RESULT_OK) {                    //检测sd卡状态                    String sdStatus = Environment.getExternalStorageState();                    if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) {                        System.out.println("SD卡可用！");                        return;                    }                    //data = null代表数据已经存储到指定的位置,如果data不为空即代表你没有指定存储目录，而是存在了默认的位置                    if (data == null) {                        Log.d(LOG_TAG, "data is null , file saved on target position");                        int width = imageView.getWidth();                        int height = imageView.getHeight();                        //BitmapFactory.Optins是BitmapFactory的内部类，用于配置图片的缩放设置                        //因为每个android app只有16mb内存的限制（不一定的，有的手机更大），                        // 图片太大，用java处理就会破了16mb                        BitmapFactory.Options factoryOptions = new BitmapFactory.Options();                        //inJustDecodeBounds设置成true之后通过decodeFile只会得出图片的宽高避免内存溢出                        factoryOptions.inJustDecodeBounds = true;                        BitmapFactory.decodeFile(fileUri.getPath(), factoryOptions);                        //获取图片的原始宽高                        int imageWidth = factoryOptions.outWidth;                        int imageHeight = factoryOptions.outHeight;                        //计算缩放比例                        int scaleFactory = Math.min(imageHeight / height, imageWidth / width);                        //设置inJustDecodeBounds为false，获取缩放后的图片                        factoryOptions.inJustDecodeBounds = false;                        //设置缩放比例                        factoryOptions.inSampleSize = scaleFactory;                        // 如果 inPurgeable 设为True的话表示使用BitmapFactory创建的Bitmap                        //用于存储Pixel的内存空间在系统内存不足时可以被回收                        factoryOptions.inPurgeable = true;                        Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(), factoryOptions);                        imageView.setImageBitmap(bitmap);                    }                }            }        }    }/** * 文件上传类 */class FileImageUpload{    private static final int TIME_OUT = 10 * 1000000;    private static final String CHARSET = "UTF-8";    public static final String SUCCESS = "1";    public static final String FAILURE = "2";    private static final String uploadUrl =  "http://192.168.2.101:8080/Test/server/upload";    public static String uploadFile(String file){        String BOUNDARY = UUID.randomUUID().toString();//边界标示 随机生成        String PREFIX = "--";        String LINE_END = "\r\n";        String CONTENT_TYPE = "multipart/form-data";        try{            URL url = new URL(uploadUrl);            HttpURLConnection conn = (HttpURLConnection)url.openConnection();            conn.setReadTimeout(TIME_OUT);            conn.setConnectTimeout(TIME_OUT);            conn.setDoInput(true);            conn.setDoOutput(true);            conn.setUseCaches(false);            conn.setRequestMethod("POST");//设置setDoOutput为true默认把方法设成POST            conn.setRequestProperty("Charset", CHARSET);            conn.setRequestProperty("connection", "keep-alive");            conn.setRequestProperty("Content-type",CONTENT_TYPE + ";boundary=" + BOUNDARY);            //上面的请求设置必须正确            if(file != null){                //如果file不为空，把文件包装并上传                DataOutputStream dos = new DataOutputStream(conn.getOutputStream());                StringBuffer sb = new StringBuffer();                sb.append(PREFIX);                sb.append(BOUNDARY);                sb.append(LINE_END);                /**                 * name为服务器端需要的key，只有这个key才可以得到对应的文件                 * filename是文件的名字，比如abc.jpg                 */                sb.append("Content-Disposition: form-data; name=\"upload\";filename=\"" + file + "\"" + LINE_END);                sb.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END);                sb.append(LINE_END);                dos.write(sb.toString().getBytes());                InputStream is = new FileInputStream(SecondActivity.mediaFile);                byte[] bytes = new byte[1024];                int len = 0;                while((len = is.read(bytes)) != -1){                    dos.write(bytes, 0, len);                }                is.close();                dos.write(LINE_END.getBytes());                byte [] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();                dos.write(end_data);                dos.flush();                /**                 * 获取响应吗 200 = 成功                 * 当响应成功，获取响应的流                 */                int res = conn.getResponseCode();                System.out.println("response code: " + res);                if(res == 200){                    return SUCCESS;                }            }        }        catch(MalformedURLException e){            e.printStackTrace();        }        catch(Exception e){            e.printStackTrace();            System.out.println("上传失败");        }        return FAILURE;    }}

下面是服务器端的程序

<pre name="code" class="java">import java.util.*;import java.io.*;import javax.management.loading.PrivateClassLoader;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.tomcat.util.*;import org.apache.tomcat.util.http.fileupload.*;import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;import org.apache.tomcat.util.http.fileupload.servlet.ServletRequestContext;import org.omg.CORBA.PRIVATE_MEMBER;public class UploadServlet extends HttpServlet {private String filePath;private String tempFilePath;@Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException ,IOException {doPost(request, response);};@Overrideprotected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {//临时目录，这里必须手动在你的webapps/服务器目录/手动创建一个temp文件夹tempFilePath = request.getSession().getServletContext().getRealPath("/temp");response.setContentType("text/plain");System.out.println(tempFilePath);try{//创建一个基于硬盘的FileItem工厂,这个工厂可以讲request里面的每个项目转换成DiskFileItem(FileItem接口的实现)DiskFileItemFactory factory = new DiskFileItemFactory();//设置项硬盘写数据时所用的缓冲区大小,单位为字节factory.setSizeThreshold(4 * 1024);//设置临时目录factory.setRepository(new File(tempFilePath));//创建一个文件上传处理器ServletFileUpload upload = new ServletFileUpload(factory);//设置允许上传的文件的最大尺寸，此处为10Mupload.setSizeMax(10 * 1024 * 1024);ServletRequestContext requestContext = new ServletRequestContext(request);List<FileItem> items = upload.parseRequest(requestContext);Iterator iter = items.iterator();while(iter.hasNext()){FileItem item = (FileItem)iter.next();String fileName = item.getName();int index = fileName.lastIndexOf("/");//获取文件名fileName = fileName.substring(index + 1, fileName.length());//下面的代码必须注意，要保存的目录必须用StringBuffer连接起来，否则系统会找不到这个文件StringBuffer sb = new StringBuffer();sb.append("/upload/");sb.append(fileName);filePath = request.getSession().getServletContext().getRealPath(sb.toString());if(item.isFormField()){processFormField(item);}else{processUploadFile(item);}}}catch(Exception e){System.out.println("can not find the file");e.printStackTrace();}}private void processFormField(FileItem item) throws Exception{//获取表单名String name = item.getFieldName();String value = item.getString("UTF-8");System.out.println("Field name: " + name);System.out.println("Value: " + value);}private void processUploadFile(FileItem item) throws Exception{File uploadedFile = new File(filePath);System.out.println(uploadedFile);item.write(uploadedFile);}}