前言
此篇主要介绍android的批量文件上传(从相册选择图片并上传)。
客户端采用HttpClient和Http协议共2种上传方式。
服务端采用Spring MVC接收批量文件上传。
ANDROID客户端1、HttpClient方式上传准备文件
httpmime-4.1.1.jar (源码里面libs文件夹下)
代码中需要使用到此jar文件中的MultipartEntity类。这是Apache的一个jar包，不是android自带的。
代码//网络请求需要开启新的线程，不能在主线程中操作Runnable multiThread = new Runnable() {@Overridepublic void run() {try {multiUploadFile1();} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void multiUploadFile1 () throws UnsupportedEncodingException {//HttpClient对象HttpClient httpClient = new DefaultHttpClient();//采用POST的请求方式//这是上传服务地址:8080/WebAppProject/main.do?method=upload2HttpPost httpPost = new HttpPost(":8080/WebAppProject/main.do?method=upload2");//MultipartEntity对象，需要httpmime-4.1.1.jar文件。MultipartEntity multipartEntity = new MultipartEntity();//StringBody对象，参数StringBody param = new StringBody("参数内容");multipartEntity.addPart("param1",param);//filesPath为List<String>对象，里面存放的是需要上传的文件的地址for (String path:filesPath) {//FileBody对象，需要上传的文件ContentBody file = new FileBody( new File(path));multipartEntity.addPart("file",file);}//将MultipartEntity对象赋值给HttpPosthttpPost.setEntity(multipartEntity);HttpResponse response = null;try {//执行请求，并返回结果HttpResponseresponse = httpClient.execute(httpPost);} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}//上传成功后返回if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {System.out.println("–>success");} else {System.out.println("–>failure");}}｝；
运行很简单：
new Thread(multiThread).start();
2、HTTP协议上传
此种方式在网上也很多，下面的HTTP协议部分的代码是从网上Copy的。
public static String post(String path, Map<String, String> params, FormFile[] files,Handler handler) throws Exception{try {final String BOUNDARY = "—————————7da2137580612"; //数据分隔线final String endline = "–" + BOUNDARY + "–\r\n";//数据结束标志int fileDataLength = 0;//文件长度for(FormFile uploadFile : files){//得到文件类型数据的总长度StringBuilder fileExplain = new StringBuilder();fileExplain.append("–");fileExplain.append(BOUNDARY);fileExplain.append("\r\n");fileExplain.append("Content-Disposition: form-data;name=\&;"+ uploadFile.getParameterName()+"\&;;filename=\&;"+ uploadFile.getFilname() + "\&;\r\n");fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");fileExplain.append("\r\n");fileDataLength += fileExplain.length();if(uploadFile.getInStream()!=null){if (uploadFile.getFile() != null) {fileDataLength += uploadFile.getFile().length();} else {fileDataLength += uploadFile.getFileSize();}}else{fileDataLength += uploadFile.getData().length;}}StringBuilder textEntity = new StringBuilder();for (Map.Entry<String, String> entry : params.entrySet()) {//构造文本类型参数的实体数据textEntity.append("–");textEntity.append(BOUNDARY);textEntity.append("\r\n");textEntity.append("Content-Disposition: form-data; name=\&;"+ entry.getKey() + "\&;\r\n\r\n");textEntity.append(entry.getValue());textEntity.append("\r\n");}//计算传输给服务器的实体数据总长度int dataLength = textEntity.toString() .getBytes().length + fileDataLength + endline.getBytes().length;URL url = new URL(path);int port = url.getPort()==-1 ? 80 : url.getPort();Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);Log.i("hbgz", "socket connected is " + socket.isConnected());OutputStream outStream = socket.getOutputStream();//下面完成HTTP请求头的发送String requestmethod = "POST "+ url.getPath()+" HTTP/1.1\r\n";outStream.write(requestmethod.getBytes());String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*\r\n";outStream.write(accept.getBytes());String language = "Accept-Language: zh-CN\r\n";outStream.write(language.getBytes());String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "\r\n";outStream.write(contenttype.getBytes());String contentlength = "Content-Length: "+ dataLength + "\r\n";outStream.write(contentlength.getBytes());String alive = "Connection: Keep-Alive\r\n";outStream.write(alive.getBytes());String host = "Host: "+ url.getHost() +":"+ port +"\r\n";outStream.write(host.getBytes());//写完HTTP请求头后根据HTTP协议再写一个回车换行outStream.write("\r\n".getBytes());//把所有文本类型的实体数据发送出来outStream.write(textEntity.toString().getBytes());int lenTotal = 0;//把所有文件类型的实体数据发送出来for(FormFile uploadFile : files){StringBuilder fileEntity = new StringBuilder();fileEntity.append("–");fileEntity.append(BOUNDARY);fileEntity.append("\r\n");fileEntity.append("Content-Disposition: form-data;name=\&;"+ uploadFile.getParameterName()+"\&;;filename=\&;"+ uploadFile.getFilname() + "\&;\r\n");fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");outStream.write(fileEntity.toString().getBytes());InputStream is = uploadFile.getInStream();if(is!=null) {byte[] buffer = new byte[1024];int len = 0;while((len = is.read(buffer, 0, 1024))!=-1){outStream.write(buffer, 0, len);lenTotal += len;//每次上传的长度Message message = new Message();message.arg1 = 11;message.obj = lenTotal;handler.sendMessage(message);}is.close();}else{outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);}outStream.write("\r\n".getBytes());}//下面发送数据结束标志，表示数据已经结束outStream.write(endline.getBytes());BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));String str = "";boolean requestCodeSuccess = false;boolean uploadSuccess = false;int indexResult = 1;while((str = reader.readLine()) != null) {Log.d("yjw", "upload—>str=" + str);if (indexResult == 1) {if (str.indexOf("200") > 0) {requestCodeSuccess = true;}}if (indexResult == 6) {if ("true".equals(str.trim())) {uploadSuccess = true;}}if (requestCodeSuccess && uploadSuccess) {outStream.flush();if(null != socket && socket.isConnected()){socket.shutdownInput();socket.shutdownOutput();}outStream.close();reader.close();socket.close();return str.trim();} else if (indexResult == 6) {outStream.flush();if(null != socket && socket.isConnected()){socket.shutdownInput();socket.shutdownOutput();}outStream.close();reader.close();socket.close();return str.trim();}++indexResult;}outStream.flush();if(null != socket && socket.isConnected()){socket.shutdownInput();socket.shutdownOutput();}outStream.close();reader.close();socket.close();return null;} catch(Exception e) {e.printStackTrace();return null;}}只要心中有希望存在，就有幸福存在。
