Android学习之客户端上传图片到服务器

根据项目需求，需要上传相册和拍照的图片，参考和借鉴了别人的资料和代码，简单地功能实现了。

一、HTTP multipart/form-data——上传报文格式

我们来了解下Android客户端如何通过HTTP协议来将图片上传到服务器。我们先来了解下HTTP multipart/form-data，上传报文格式。

假设接收文件的网页程序是http://172.31.8.6:8080/fileUpload/file_upload。假设我们要发送一个图片文件，文件名为“iamge.jpg”。

首先，客户端成功链接172.31.8.6后，会发送如下的HTTP请求：

      POST/http://172.31.8.6:8080/fileUpload/file_upload HTTP/1.1 
　　Accept: text/plain, */* 
　　Accept-Language: zh-cn 
　　Host: 172.31.8.6
　　Content-Type:multipart/form-data;boundary=-----------------------------7db372eb000e2
　　User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
　　Content-Length: 3693
　　Connection: Keep-Alive
　　-------------------------------7db372eb000e2
　　Content-Disposition: form-data; name="img"; filename="image.jpg"
　　Content-Type: image/jpeg
　　(此处省略jpeg文件二进制数据...）
　　-------------------------------7db372eb000e2--

此内容必须一字不差，包括最后的回车，红色字体部分就是协议的头。给服务器上传数据时，并非协议头每个字段都得说明，其中，content-type是必须的，它包括一个类似标志性质的名为boundary的标志，它可以是随便输入的字符串。对后面的具体内容也是必须的。它用来分辨一段内容的开始。Content-Length: 3693 ，这里的3693是要上传文件的总长度。绿色字体部分就是需要上传的数据，可以是文本，也可以是图片等。数据内容前面需要有Content-Disposition, Content-Type以及Content-Transfer-Encoding等说明字段。最后的紫色部分就是协议的结尾了。

注意这一行：

　　Content-Type: multipart/form-data; boundary=---------------------------7db372eb000e2　　

　　根据 rfc1867, multipart/form-data是必须的. 

　　---------------------------7db372eb000e2 是分隔符，分隔多个文件、表单项。其中b372eb000e2 是即时生成的一个数字，用以确保整个分隔符不会在文件或表单项的内容中出现。Form每个部分用分隔符分割，分隔符之前必须加上"--"着两个字符(即--{boundary})才能被http协议认为是Form的分隔符，表示结束的话用在正确的分隔符后面添加"--"表示结束。

　　前面的 ---------------------------7d 是 IE 特有的标志,Mozila 为---------------------------71. 

　　每个分隔的数据的都可以用Content-Type来表示下面数据的类型，可以参考rfc1341(http://www.ietf.org/rfc/rfc1341.txt)

　　例如 ：Contect-Type:image/jpeg 表示下面的数据是jpeg文件数据。

二、客户端源码

MainActivity.java

package com.fg.activity;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStreamReader;import java.util.HashMap;import java.util.Map;import android.app.Activity;import android.app.ProgressDialog;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.KeyEvent;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;import com.fg.util.UploadUtil;import com.fg.util.UploadUtil.OnUploadProcessListener;/** * @author ICQwlj<br> * Email :[e-mail]<br> * 说明：主要用于选择文件和上传文件操作 */public class MainActivity extends Activity implements OnClickListener,OnUploadProcessListener{private static final String TAG = "uploadImage";/** * 去上传文件 */protected static final int TO_UPLOAD_FILE = 1;  /** * 上传文件响应 */protected static final int UPLOAD_FILE_DONE = 2;  ///** * 选择文件 */public static final int TO_SELECT_PHOTO = 3;/** * 上传初始化 */private static final int UPLOAD_INIT_PROCESS = 4;/** * 上传中 */private static final int UPLOAD_IN_PROCESS = 5;/*** * 这里的这个URL是我服务器的javaEE环境URL */private static String requestURL = "http://172.31.8.6:8080/fileUpload/file_upload";private Button selectButton,uploadButton;private ImageView imageView;private TextView uploadImageResult;private String picPath = null;private ProgressDialog progressDialog;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        initView();    }        /**     * 初始化数据     */private void initView() {        selectButton = (Button) this.findViewById(R.id.selectImage);        uploadButton = (Button) this.findViewById(R.id.uploadImage);        selectButton.setOnClickListener(this);        uploadButton.setOnClickListener(this);        imageView = (ImageView) this.findViewById(R.id.imageView);uploadImageResult = (TextView) findViewById(R.id.uploadImageResult);        progressDialog = new ProgressDialog(this);        }@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.selectImage:Intent intent = new Intent(this,SelectPicActivity.class);startActivityForResult(intent, TO_SELECT_PHOTO);break;case R.id.uploadImage:if(picPath!=null){handler.sendEmptyMessage(TO_UPLOAD_FILE);}else{Toast.makeText(this, "上传的文件路径出错", Toast.LENGTH_LONG).show();}break;default:break;}}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {if(resultCode==Activity.RESULT_OK && requestCode == TO_SELECT_PHOTO){picPath = data.getStringExtra(SelectPicActivity.KEY_PHOTO_PATH);Log.i(TAG, "最终选择的图片="+picPath);Bitmap bm = BitmapFactory.decodeFile(picPath);imageView.setImageBitmap(bm);
//更新图库
Uri localUri = Uri.fromFile(new File(picPath));    Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, localUri);    sendBroadcast(localIntent);}super.onActivityResult(requestCode, resultCode, data);}/** * 上传服务器响应回调 */@Overridepublic void onUploadDone(int responseCode, String message) {progressDialog.dismiss();Message msg = Message.obtain();msg.what = UPLOAD_FILE_DONE;msg.arg1 = responseCode;msg.obj = message;handler.sendMessage(msg);}private void toUploadFile(){uploadImageResult.setText("正在上传中...");progressDialog.setMessage("正在上传文件...");progressDialog.show();String fileKey = "img";UploadUtil uploadUtil = UploadUtil.getInstance();uploadUtil.setOnUploadProcessListener(this);  //设置监听器监听上传状态Map<String, String> params = new HashMap<String, String>();params.put("orderId", "11111");uploadUtil.uploadFile( picPath,fileKey, requestURL,params);}@Overridepublic void onUploadProcess(int uploadSize) {Message msg = Message.obtain();msg.what = UPLOAD_IN_PROCESS;msg.arg1 = uploadSize;handler.sendMessage(msg);}@Overridepublic void initUpload(int fileSize) {Message msg = Message.obtain();msg.what = UPLOAD_INIT_PROCESS;msg.arg1 = fileSize;handler.sendMessage(msg );}private Handler handler = new Handler(){@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case TO_UPLOAD_FILE:toUploadFile();break;case UPLOAD_INIT_PROCESS:break;case UPLOAD_IN_PROCESS:break;case UPLOAD_FILE_DONE:String result = "响应码："+msg.arg1+"\n响应信息："+msg.obj+"\n耗时："+UploadUtil.getRequestTime()+"秒";uploadImageResult.setText(result);break;
default:break;}super.handleMessage(msg);}};}

SelectPicActivity.java

package com.fg.activity;import android.app.Activity;import android.content.ContentValues;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.LinearLayout;import android.widget.Toast;/** * @author ICQwlj<br> * Email :[e-mail]<br> * 说明：主要用于选择文件操作 */public class SelectPicActivity extends Activity implements OnClickListener{/*** * 使用照相机拍照获取图片 */public static final int SELECT_PIC_BY_TACK_PHOTO = 1;/*** * 使用相册中的图片 */public static final int SELECT_PIC_BY_PICK_PHOTO = 2;/*** * 从Intent获取图片路径的KEY */public static final String KEY_PHOTO_PATH = "photo_path";private static final String TAG = "SelectPicActivity";private LinearLayout dialogLayout;private Button takePhotoBtn,pickPhotoBtn,cancelBtn;/**获取到的图片路径*/private String picPath;private Intent lastIntent ;private Uri photoUri;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.select_pic_layout);initView();}/** * 初始化加载View */private void initView() {dialogLayout = (LinearLayout) findViewById(R.id.dialog_layout);dialogLayout.setOnClickListener(this);takePhotoBtn = (Button) findViewById(R.id.btn_take_photo);takePhotoBtn.setOnClickListener(this);pickPhotoBtn = (Button) findViewById(R.id.btn_pick_photo);pickPhotoBtn.setOnClickListener(this);cancelBtn = (Button) findViewById(R.id.btn_cancel);cancelBtn.setOnClickListener(this);lastIntent = getIntent();}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.dialog_layout:finish();break;case R.id.btn_take_photo:takePhoto();break;case R.id.btn_pick_photo:pickPhoto();break;default:finish();break;}}/** * 拍照获取图片 */private void takePhoto() {//执行拍照前，应该先判断SD卡是否存在String SDState = Environment.getExternalStorageState();if(SDState.equals(Environment.MEDIA_MOUNTED)){Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//"android.media.action.IMAGE_CAPTURE"/*** * 需要说明一下，以下操作使用照相机拍照，拍照后的图片会存放在相册中的 * 这里使用的这种方式有一个好处就是获取的图片是拍照后的原图 * 如果不实用ContentValues存放照片路径的话，拍照后获取的图片为缩略图不清晰 */ContentValues values = new ContentValues();  photoUri = this.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);  intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, photoUri);/**-----------------*/startActivityForResult(intent, SELECT_PIC_BY_TACK_PHOTO);}else{Toast.makeText(this,"内存卡不存在", Toast.LENGTH_LONG).show();}}/*** * 从相册中取图片 */private void pickPhoto() {Intent intent = new Intent();intent.setType("image/*");intent.setAction(Intent.ACTION_GET_CONTENT);startActivityForResult(intent, SELECT_PIC_BY_PICK_PHOTO);}@Overridepublic boolean onTouchEvent(MotionEvent event) {finish();return super.onTouchEvent(event);}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {if(resultCode == Activity.RESULT_OK){doPhoto(requestCode,data);}super.onActivityResult(requestCode, resultCode, data);}/** * 选择图片后，获取图片的路径 * @param requestCode * @param data */private void doPhoto(int requestCode,Intent data){if(requestCode == SELECT_PIC_BY_PICK_PHOTO )  //从相册取图片，有些手机有异常情况，请注意{if(data == null){Toast.makeText(this, "选择图片文件出错", Toast.LENGTH_LONG).show();return;}photoUri = data.getData();if(photoUri == null ){Toast.makeText(this, "选择图片文件出错", Toast.LENGTH_LONG).show();return;}}String[] pojo = {MediaStore.Images.Media.DATA};Cursor cursor = managedQuery(photoUri, pojo, null, null,null);   if(cursor != null ){int columnIndex = cursor.getColumnIndexOrThrow(pojo[0]);cursor.moveToFirst();picPath = cursor.getString(columnIndex);cursor.close();}Log.i(TAG, "imagePath = "+picPath);if(picPath != null && ( picPath.endsWith(".png") || picPath.endsWith(".PNG") ||picPath.endsWith(".jpg") ||picPath.endsWith(".JPG")  )){lastIntent.putExtra(KEY_PHOTO_PATH, picPath);setResult(Activity.RESULT_OK, lastIntent);finish();}else{Toast.makeText(this, "选择图片文件不正确", Toast.LENGTH_LONG).show();}}}

UploadUtil.java

package com.fg.util;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.Iterator;import java.util.Map;import java.util.UUID;import android.util.Log;/** *  * 上传工具类 * @author ICQwlj<br> * Email :[e-mail]<br> * 支持上传文件和参数 */public class UploadUtil {private static UploadUtil uploadUtil;private static final String BOUNDARY =  UUID.randomUUID().toString(); // 边界标识 随机生成private static final String PREFIX = "--";private static final String LINE_END = "\r\n";private static final String CONTENT_TYPE = "multipart/form-data"; // 内容类型private UploadUtil() {}/** * 单例模式获取上传工具类 * @return */public static UploadUtil getInstance() {if (null == uploadUtil) {uploadUtil = new UploadUtil();}return uploadUtil;}private static final String TAG = "UploadUtil";private int readTimeOut = 10 * 1000; // 读取超时private int connectTimeout = 10 * 1000; // 超时时间/*** * 请求使用多长时间 */private static int requestTime = 0;private static final String CHARSET = "utf-8"; // 设置编码/*** * 上传成功 */public static final int UPLOAD_SUCCESS_CODE = 1;/** * 文件不存在 */public static final int UPLOAD_FILE_NOT_EXISTS_CODE = 2;/** * 服务器出错 */public static final int UPLOAD_SERVER_ERROR_CODE = 3;protected static final int WHAT_TO_UPLOAD = 1;protected static final int WHAT_UPLOAD_DONE = 2;/** * android上传文件到服务器 *  * @param filePath *            需要上传的文件的路径 * @param fileKey *            在网页上<input type=file name=xxx/> xxx就是这里的fileKey * @param RequestURL *            请求的URL */public void uploadFile(String filePath, String fileKey, String RequestURL, Map<String, String> param) {if (filePath == null) {sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在");return;}try {File file = new File(filePath);uploadFile(file, fileKey, RequestURL, param);} catch (Exception e) {sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在");e.printStackTrace();return;}}/** * android上传文件到服务器 *  * @param file *            需要上传的文件 * @param fileKey *            在网页上<input type=file name=xxx/> xxx就是这里的fileKey * @param RequestURL *            请求的URL */public void uploadFile(final File file, final String fileKey, final String RequestURL, final Map<String, String> param) {if (file == null || (!file.exists())) {sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在");return;}Log.i(TAG, "请求的URL=" + RequestURL);Log.i(TAG, "请求的fileName=" + file.getName());Log.i(TAG, "请求的fileKey=" + fileKey);new Thread(new Runnable() {  //开启线程上传文件@Overridepublic void run() {toUploadFile(file, fileKey, RequestURL, param);}}).start();}private void toUploadFile(File file, String fileKey, String RequestURL, Map<String, String> param) {String result = null;requestTime= 0;long requestTime = System.currentTimeMillis();long responseTime = 0;try {URL url = new URL(RequestURL);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setReadTimeout(readTimeOut);conn.setConnectTimeout(connectTimeout);conn.setDoInput(true); // 允许输入流conn.setDoOutput(true); // 允许输出流conn.setUseCaches(false); // 不允许使用缓存conn.setRequestMethod("POST"); // 请求方式conn.setRequestProperty("Charset", CHARSET); // 设置编码conn.setRequestProperty("connection", "keep-alive");conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);/** * 当文件不为空，把文件包装并且上传 */DataOutputStream dos = new DataOutputStream(conn.getOutputStream());StringBuffer sb = null;String params = "";/*** * 以下是用于上传参数 */if (param != null && param.size() > 0) {Iterator<String> it = param.keySet().iterator();while (it.hasNext()) {sb = null;sb = new StringBuffer();String key = it.next();String value = param.get(key);sb.append(PREFIX).append(BOUNDARY).append(LINE_END);sb.append("Content-Disposition: form-data; name=\"").append(key).append("\"").append(LINE_END).append(LINE_END);sb.append(value).append(LINE_END);params = sb.toString();Log.i(TAG, key+"="+params+"##");dos.write(params.getBytes());}}sb = null;params = null;sb = new StringBuffer();/** * 这里重点注意： name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件 * filename是文件的名字，包含后缀名的 比如:abc.png */sb.append(PREFIX).append(BOUNDARY).append(LINE_END);sb.append("Content-Disposition:form-data; name=\"" + fileKey+ "\"; filename=\"" + file.getName() + "\"" + LINE_END);sb.append("Content-Type:image/pjpeg" + LINE_END); // 这里配置的Content-type很重要的 ，用于服务器端辨别文件的类型的sb.append(LINE_END);params = sb.toString();sb = null;Log.i(TAG, file.getName()+"=" + params+"##");dos.write(params.getBytes());/**上传文件*/InputStream is = new FileInputStream(file);onUploadProcessListener.initUpload((int)file.length());byte[] bytes = new byte[1024];int len = 0;int curLen = 0;while ((len = is.read(bytes)) != -1) {curLen += len;dos.write(bytes, 0, len);onUploadProcessListener.onUploadProcess(curLen);}is.close();dos.write(LINE_END.getBytes());byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();dos.write(end_data);dos.flush();
/** * 获取响应码 200=成功 当响应成功，获取响应的流 */int res = conn.getResponseCode();responseTime = System.currentTimeMillis();this.requestTime = (int) ((responseTime-requestTime)/1000);Log.e(TAG, "response code:" + res);if (res == 200) {Log.e(TAG, "request success");InputStream input = conn.getInputStream();StringBuffer sb1 = new StringBuffer();int ss;while ((ss = input.read()) != -1) {sb1.append((char) ss);}result = sb1.toString();Log.e(TAG, "result : " + result);sendMessage(UPLOAD_SUCCESS_CODE, "上传结果："+ result);return;} else {Log.e(TAG, "request error");sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：code=" + res);return;}} catch (MalformedURLException e) {sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：error=" + e.getMessage());e.printStackTrace();return;} catch (IOException e) {sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：error=" + e.getMessage());e.printStackTrace();return;}}/** * 发送上传结果 * @param responseCode * @param responseMessage */private void sendMessage(int responseCode,String responseMessage){onUploadProcessListener.onUploadDone(responseCode, responseMessage);}/** * 下面是一个自定义的回调函数，用到回调上传文件是否完成 *  * @author shimingzheng *  */public static interface OnUploadProcessListener {/** * 上传响应 * @param responseCode * @param message */void onUploadDone(int responseCode, String message);/** * 上传中 * @param uploadSize */void onUploadProcess(int uploadSize);/** * 准备上传 * @param fileSize */void initUpload(int fileSize);}private OnUploadProcessListener onUploadProcessListener;public void setOnUploadProcessListener(OnUploadProcessListener onUploadProcessListener) {this.onUploadProcessListener = onUploadProcessListener;}public int getReadTimeOut() {return readTimeOut;}public void setReadTimeOut(int readTimeOut) {this.readTimeOut = readTimeOut;}public int getConnectTimeout() {return connectTimeout;}public void setConnectTimeout(int connectTimeout) {this.connectTimeout = connectTimeout;}/** * 获取上传使用的时间 * @return */public static int getRequestTime() {return requestTime;}public static interface uploadProcessListener{}
}

AndroidMainfest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.fg.activity"      android:versionCode="1"      android:versionName="1.0">    <uses-sdk android:minSdkVersion="10" />    <!-- 权限赋予 -->    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.CAMERA" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />    <uses-permission android:name="android.permission.READ_LOGS" />    <application android:icon="@drawable/logo" android:label="@string/app_name">        <activity android:name=".MainActivity"                  android:label="@string/app_name">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name=".SelectPicActivity" android:theme="@style/DialogStyleBottom"/>    </application></manifest>

三、服务器源码

FileUpload.java

package com.zhangke.action;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.PrintWriter;import java.text.DecimalFormat;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;/*** * 文件上传例子   resource code encoding is utf-8 * <br>主要为了android客户端实现功能   代码写的乱   请大家见谅 * @author ICQwlj<br> * Email :[e-mail]<br> * */public class FileUpload extends ActionSupport {private String savePath;/**这里的名字和html的名字必须对称*/private File img;/**要上传的文件类型*/private String imgContentType;/**文件的名称*/private String imgFileName;private String orderId;
public String getSavePath() {return ServletActionContext.getServletContext().getRealPath(savePath);}public File getImg() {return img;}public String getImgFileName() {return imgFileName;}public void setSavePath(String value) {this.savePath = value;}public void setImgFileName(String imgFileName) {this.imgFileName = imgFileName;}public void setImg(File img) {this.img = img;}public String getImgContentType() {return imgContentType;}public void setImgContentType(String imgContentType) {this.imgContentType = imgContentType;}public String getOrderId() {return orderId;}public void setOrderId(String orderId) {this.orderId = orderId;}
/** * 指定的上传类型zip和图片格式的文件 */private static final String[] types = { "application/x-zip-compressed","ZIP", "image/pjpeg","image/x-png","image/jpeg","image/png" };  //"application/octet-stream; charset=utf-8",/*** * 判断文件的类型是否为指定的文件类型 * @return */public boolean filterType() {boolean isFileType = false;String fileType = getImgContentType();System.out.println(fileType);for (String type : types) {if (type.equals(fileType)) {isFileType = true;break;}}return isFileType;}
/** * 取得文件夹大小 *  * @param f * @return * @throws Exception */public long getFileSize(File f) throws Exception {return f.length();}public String FormetFileSize(long fileS) {// 转换文件大小DecimalFormat df = new DecimalFormat("#.00");String fileSizeString = "";if (fileS < 1024) {fileSizeString = df.format((double) fileS) + "B";} else if (fileS < 1048576) {fileSizeString = df.format((double) fileS / 1024) + "K";} else if (fileS < 1073741824) {fileSizeString = df.format((double) fileS / 1048576) + "M";} else {fileSizeString = df.format((double) fileS / 1073741824) + "G";}return fileSizeString;}/** * 上传文件操作 *  * @return * @throws Exception */public String upload() throws Exception {String ct  =  ServletActionContext.getRequest().getHeader("Content-Type");System.out.println("Content-Type="+ct);String result = "unknow error";System.out.println("orderId="+getOrderId());PrintWriter out = ServletActionContext.getResponse().getWriter();if (!filterType()) {System.out.println("文件类型不正确");ServletActionContext.getRequest().setAttribute("typeError","您要上传的文件类型不正确");result = "error:" + getImgContentType() + " type not upload file type";} else {System.out.println("当前文件大小为："+ FormetFileSize(getFileSize(getImg())));FileOutputStream fos = null;FileInputStream fis = null;try {// 保存文件那一个路径fos = new FileOutputStream(getSavePath() + "\\"+ getImgFileName());fis = new FileInputStream(getImg());byte[] buffer = new byte[1024];int len = 0;while ((len = fis.read(buffer)) > 0) {fos.write(buffer, 0, len);}result = "upload file success !";} catch (Exception e) {result = "upload file failed ! ";e.printStackTrace();} finally {fos.close();fis.close();}}out.print(result);return null;}}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"><struts><constant name="struts.custom.i18n.resources" value="globalMessages"/><constant name="struts.i18n.encoding" value="utf-8"/><!-- 服务器指定一个临时的路径，这里使用了绝对路径，大家根据自己的Tomcat路径自行设置，否则会上传失败 --><constant name="struts.multipart.saveDir" value="D:\apache-tomcat-6.0.35/temp"/><constant name="struts.multipart.maxSize" value="30000000"></constant><package name="lee" extends="struts-default"><action name="file_*" class="com.zhangke.action.FileUpload" method="{1}"><interceptor-ref name="fileUpload"><!--<param name="allowedTypes">application/zip,application/octet-stream</param>--><param name="maximumSize">524288000</param></interceptor-ref><interceptor-ref name="defaultStack"/><!-- 保存路径为当前项目WebRoot/upload --><param name="savePath">/upload</param><result name="success">index.jsp</result><result name="input">index.jsp</result></action></package></struts>    

四、效果图

  五、完整的代码：http://download.csdn.net/detail/wlj142/7594879。其中，代码参考借鉴了蛮多人，在此就不一一例举了。

PS：如果是在本地服务器上调试代码，个人有以下几点建议：

1、最好拿真机来跑Android程序，因为有些时候，模拟器上报错是因为模拟器的某些硬件不支持，毕竟最后要拿到真机上运行。而且，用真机运行程序还有一个好处，就是运行速度快，加载模拟器的时间实在是不敢恭维；

2、如果自身的服务器没有对外IP，则需要通过将本地服务器与真机同时连接到一个无线路由里面，由路由器统一分配IP，然后再在客户端里面的访问HTTP的URL中，将IP改为服务器所获得到的IP地址即可。当然，也可以使用10.0.2.2来访问本地服务器，不过得通过USB线连接真机。

以上是个人看法，仅供参考。