使用http协议实现文件的上传（http协议上传文件一般最大是2M，比较适合上传小于两M的文件）

importjava.io.File; importjava.io.FileInputStream; importjava.io.FileNotFoundException; importjava.io.InputStream;  /*** 上传的文件 */ publicclassFormFile {  /** 上传文件的数据 */ privatebyte[] data;  privateInputStream inStream;  privateFile file;  /** 文件名称 */ privateString filname;  /** 请求参数名称*/ privateString parameterName;  /** 内容类型 */ privateString 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  */ publicFormFile(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  */ publicFormFile(String filname, File file, String parameterName, String contentType) {      this.filname = filname;      this.parameterName = parameterName;      this.file = file;      try{     this.inStream = newFileInputStream(file);     }catch(FileNotFoundException e) {      e.printStackTrace();     }     if(contentType!=null)this.contentType = contentType;  }    publicFile getFile() {      returnfile; }  publicInputStream getInStream() {      returninStream; }  publicbyte[] getData() {      returndata; }  publicString getFilname() {      returnfilname; }  publicvoidsetFilname(String filname) {      this.filname = filname;  }  publicString getParameterName() {      returnparameterName; }  publicvoidsetParameterName(String parameterName) {      this.parameterName = parameterName;  }  publicString getContentType() {      returncontentType; }  publicvoidsetContentType(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  */ publicstaticboolean post(String path, Map<String, String> params, FormFile[] files) throwsException{          finalString BOUNDARY = "---------------------------7da2137580612";//数据分隔线      finalString endline = "--"+ BOUNDARY + "--\r\n";//数据结束标志             intfileDataLength = 0;     for(FormFile uploadFile : files){//得到文件类型数据的总长度      StringBuilder fileExplain = newStringBuilder();     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 = newStringBuilder();     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      intdataLength = textEntity.toString().getBytes().length + fileDataLength +  endline.getBytes().length;            URL url = newURL(path);     intport = url.getPort()==-1?80: url.getPort();      Socket socket = newSocket(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 = newStringBuilder();     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 = newbyte[1024];         intlen = 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 = newBufferedReader(newInputStreamReader(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      returnfalse;     }     outStream.flush();     outStream.close();     reader.close();     socket.close();     returntrue; }    /**  * 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   */ publicstaticboolean post(String path, Map<String, String> params, FormFile file) throwsException{    returnpost(path, params, newFormFile[]{file}); }