android批量文件上传（android批量图片上传）

原文地址：http://blog.csdn.net/y150481863/article/details/25201085

项目中多处用到文件批量上传功能，今天正好解决了此问题，在此写出来，以便日后借鉴。
首先，以下架构下的批量文件上传可能会失败或者不会成功：
1.android客户端+springMVC服务端：服务端采用org.springframework.web.multipart.MultipartHttpServletRequest作为批量上传接收类，这种搭配下的批量文件上传会失败，最终服务端只会接受到一个文件，即只会接受到第一个文件。可能因为MultipartHttpServletRequest对servlet原本的HttpServletRequest类进行封装，导致批量上传有问题。
2.android客户端+strutsMVC服务端：这种搭配下的多文件上传，本人没有亲自尝试，不做评论。如果有网友采用此种方式上传失败的，原因可能同1。

接下来说明上传成功的方案：
采用android客户端+Servlet（HttpServletRequest）进行文件上传。
Servlet端代码如下：

[java]view plaincopyprint?DiskFileItemFactory factory = new DiskFileItemFactory();ServletFileUpload upload = new ServletFileUpload(factory);try{List items = upload.parseRequest(request);Iterator itr = items.iterator();while (itr.hasNext()){FileItem item = (FileItem) itr.next();if (item.isFormField()){System.out.println("表单参数名:" + item.getFieldName() + "，表单参数值:" + item.getString("UTF-8"));}else{if (item.getName() != null && !item.getName().equals("")){System.out.println("上传文件的大小:" + item.getSize());System.out.println("上传文件的类型:" + item.getContentType());// item.getName()返回上传文件在客户端的完整路径名称System.out.println("上传文件的名称:" + item.getName());File tempFile = new File(item.getName());// 上传文件的保存路径File file = new File(sc.getRealPath("/") + savePath, tempFile.getName());item.write(file);request.setAttribute("upload.message", "上传文件成功！");} else{request.setAttribute("upload.message", "没有选择上传文件！");}}}}catch (FileUploadException e){e.printStackTrace();}catch (Exception e){e.printStackTrace();request.setAttribute("upload.message", "上传文件失败！");}request.getRequestDispatcher("/uploadResult.jsp").forward(request, response);android端代码如下：[java]view plaincopyprint?public class SocketHttpRequester {/***多文件上传* 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能:* <FORM METHOD=POST ACTION="http://192.168.1.101:8083/upload/servlet/UploadServlet" enctype="multipart/form-data"><INPUT TYPE="text" NAME="name"><INPUT TYPE="text" NAME="id"><input type="file" name="imagefile"/><input type="file" name="zip"/></FORM>* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.iteye.cn或http://192.168.1.101:8083这样的路径测试)* @param params 请求参数 key为参数名,value为参数值* @param file 上传文件*/public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线final String endline = "--" + BOUNDARY + "--\r\n";//数据结束标志int fileDataLength = 0;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){fileDataLength += uploadFile.getFile().length();}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);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());//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());if(uploadFile.getInStream()!=null){byte[] buffer = new byte[1024];int len = 0;while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){outStream.write(buffer, 0, len);}uploadFile.getInStream().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()));if(reader.readLine().indexOf("200")==-1){//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败return false;}outStream.flush();outStream.close();reader.close();socket.close();return true;}/***单文件上传* 提交数据到服务器* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试)* @param params 请求参数 key为参数名,value为参数值* @param file 上传文件*/public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{return post(path, params, new FormFile[]{file});}}FormFile类的代码如下[java]view plaincopyprint?public class FormFile {/* 上传文件的数据 */private byte[] data;private InputStream inStream;private File file;private int fileSize;/* 文件名称 */private String filname;/* 请求参数名称*/private String parameterName;/* 内容类型 */private String contentType = "application/octet-stream";public FormFile(String filname, byte[] data, String parameterName, String contentType) {this.data = data;this.filname = filname;this.parameterName = parameterName;if(contentType!=null) this.contentType = contentType;}public FormFile(String filname, File file, String parameterName, String contentType) {this.filname = filname;this.parameterName = parameterName;this.file = file;try {this.inStream = new FileInputStream(file);} catch (FileNotFoundException e) {e.printStackTrace();}if(contentType!=null) this.contentType = contentType;}public FormFile(InputStream inStream, int fileSize, String filname,String parameterName, String contentType) {super();this.inStream = inStream;this.fileSize = fileSize;this.filname = filname;this.parameterName = parameterName;this.contentType = contentType;}public int getFileSize() {return fileSize;}public File getFile() {return file;}public InputStream getInStream() {return inStream;}public byte[] getData() {return data;}public String getFilname() {return filname;}public void setFilname(String filname) {this.filname = filname;}public String getParameterName() {return parameterName;}public void setParameterName(String parameterName) {this.parameterName = parameterName;}public String getContentType() {return contentType;}public void setContentType(String contentType) {this.contentType = contentType;}}