HTTP协议上传文件到web

以下是通过HTTP协议上传文件到web服务器

   业务逻辑层的代码实现

 

public class SocketHttpRequester {/** * 发送xml数据 * @param path 请求地址 * @param xml xml数据 * @param encoding 编码 * @return * @throws Exception */public static byte[] postXml(String path, String xml, String encoding) throws Exception{byte[] data = xml.getBytes(encoding);URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection)url.openConnection();conn.setRequestMethod("POST");conn.setDoOutput(true);conn.setRequestProperty("Content-Type", "text/xml; charset="+ encoding);conn.setRequestProperty("Content-Length", String.valueOf(data.length));conn.setConnectTimeout(5 * 1000);OutputStream outStream = conn.getOutputStream();outStream.write(data);outStream.flush();outStream.close();if(conn.getResponseCode()==200){return readStream(conn.getInputStream());}return null;}/** * 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 * @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;}

javabean 的代码

 /** * 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";  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; }