Android使用http协议实现文件的上传

 http协议上传文件一般最大为2M，比较适合上传小文件。

import java.io.File;  import java.io.FileInputStream;  import java.io.FileNotFoundException;  import java.io.InputStream;  /** * 上传的文件 */  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";  /**  *   * @param filname 文件名称  * @param data 上传的文件数据  * @param parameterName 参数  * @param contentType 内容类型  */  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;  }  /**  *   * @param filname 文件名  * @param file 上传的文件  * @param parameterName 参数  * @param contentType 内容内容类型  */  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 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;  }    }  /**  * 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://192.168.0.200:8080/ssi/fileload/test.do" 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.xxx.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[] 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;  }    /**   * 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.xxx.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});  }