android通过HTTP协议上传文件至远程服务器

1.通过浏览器上传文件捕获的数据截图，也就意味着在android客户端也必须遵循这样的数据方式。

2.android客户端上传工具类

   将以上数据中的字段封装为一个上传文件的实体对象。

import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.InputStream;/** * 上传文件 */public class FormFile {/* 上传文件的数据 */private byte[] data;private InputStream inStream;private File file;/* 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";/** * 小文件上传（建议） * @param filname * @param data 文件数据 * @param parameterName * @param contentType */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;}/** * 上传大文件(建议) * @param file 文件 * @param parameterName * @param contentType */public FormFile(File file, String parameterName, String contentType) {this.filname = file.getName();this.parameterName = parameterName;this.file = file;try {this.inStream = new FileInputStream(file);} catch (FileNotFoundException e) {e.printStackTrace();}if(contentType!=null) this.contentType = contentType;}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;}}

3.实现上传文件的业务逻辑工具类

public class SocketHttpRequester {/** * 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://192.168.1.107:8080/ManageServlet" 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 * @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");         fileDataLength += fileExplain.length();        if(uploadFile.getInStream()!=null){        fileDataLength += uploadFile.getFile().length();     }else{     fileDataLength += uploadFile.getData().length;     }        fileDataLength += "\r\n".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;}/** * 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 * @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});}/** * 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 * @param params 请求参数 key为参数名,value为参数值 * @param encode 编码 */public static byte[] postFromHttpClient(String path, Map<String, String> params, String encode) throws Exception{List<NameValuePair> formparams = new ArrayList<NameValuePair>();//用于存放请求参数for(Map.Entry<String, String> entry : params.entrySet()){formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));}UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, encode);HttpPost httppost = new HttpPost(path);httppost.setEntity(entity);HttpClient httpclient = new DefaultHttpClient();//看作是浏览器HttpResponse response = httpclient.execute(httppost);//发送post请求return readStream(response.getEntity().getContent());}/** * 发送请求 * @param path 请求路径 * @param params 请求参数 key为参数名称 value为参数值 * @param encode 请求参数的编码 */public static byte[] post(String path, Map<String, String> params, String encode) throws Exception{StringBuilder parambuilder = new StringBuilder("");if(params!=null && !params.isEmpty()){for(Map.Entry<String, String> entry : params.entrySet()){parambuilder.append(entry.getKey()).append("=").append(URLEncoder.encode(entry.getValue(), encode)).append("&");}parambuilder.deleteCharAt(parambuilder.length()-1);}byte[] data = parambuilder.toString().getBytes();URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection)url.openConnection();conn.setDoOutput(true);//允许对外发送请求参数conn.setUseCaches(false);//不进行缓存conn.setConnectTimeout(5 * 1000);conn.setRequestMethod("POST");//下面设置http请求头conn.setRequestProperty("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, */*");conn.setRequestProperty("Accept-Language", "zh-CN");conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");conn.setRequestProperty("Content-Length", String.valueOf(data.length));conn.setRequestProperty("Connection", "Keep-Alive");//发送参数DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());outStream.write(data);//把参数发送出去outStream.flush();outStream.close();if(conn.getResponseCode()==200){return readStream(conn.getInputStream());}return null;}/** * 读取流 * @param inStream * @return 字节数组 * @throws Exception */public static byte[] readStream(InputStream inStream) throws Exception{ByteArrayOutputStream outSteam = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len = -1;while( (len=inStream.read(buffer)) != -1){outSteam.write(buffer, 0, len);}outSteam.close();inStream.close();return outSteam.toByteArray();}}

4.上传文件业务方法

/** * 上传文件 * @param title * @param length * @param uploadFile * @return */public static boolean save(String title, String length, File uploadFile) {String path="http://192.168.1.107:8080/ManageServlet";//服务器路径Map<String, String> params=new HashMap<String, String>();params.put("title", title);params.put("timelength", length);FormFile formFile=new FormFile(uploadFile, "fileinput", "application/octet-stream");//文件类型可以采用数据字典进行匹配try {return SocketHttpRequester.post(path, params, formFile);} catch (Exception e) {e.printStackTrace();}return false;}

5.activity调用示例

public void save(View v) {String title = titleText.getText().toString();String length = lengthText.getText().toString();String filename = fileNameText.getText().toString();// 判断SD卡是否存在if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)|| Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED_READ_ONLY)) {File uploadFile=new File(Environment.getExternalStorageDirectory(),filename);if(uploadFile.exists()){boolean result = NewsService.save(title, length,uploadFile);if (result) {Toast.makeText(getApplicationContext(), R.string.success, 1).show();} else {Toast.makeText(getApplicationContext(), R.string.error, 1).show();}}else{Toast.makeText(getApplicationContext(), R.string.filenoexsit, 1).show();}}else{//如果SD卡不存在就执行普通保存数据boolean result = NewsService.save(title, length);if (result) {Toast.makeText(getApplicationContext(), R.string.success, 1).show();} else {Toast.makeText(getApplicationContext(), R.string.error, 1).show();}}}

android客户端提供三个文本输入框，测试的时候将文件放入SD卡，然后填写SD卡的目录即可，在真实的使用环境中需要提供让用户可以选择文件。

源码下载：android通过HTTP协议上传文件至远程服务器