通過http協議向web上傳檔案
阿新 • • 發佈：2019-02-11
一、通過edtitext獲得要新增的檔名字，在FormFile構造方法中獲得該檔案輸入流，
public class MainActivity extends Activity { private EditText titleText; private EditText lengthText; private EditText nameText; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); titleText = (EditText) this.findViewById(R.id.title); lengthText = (EditText) this.findViewById(R.id.timelength); nameText = (EditText) this.findViewById(R.id.filename); } public void save(View v){ String filename = nameText.getText().toString(); String title = titleText.getText().toString(); String length = lengthText.getText().toString(); 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{ 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(); } } } }
呼叫的save方法，其中的FormFileSocket(uploadFile, "videofile", "image/gif")構造方法新增資料，獲得檔案輸入流，方法 HttpRequester.post(path, params, formFile)是基於Http協議進行檔案上傳
public static boolean save(String title, String length, File uploadFile) { String path = "http://192.168.0.168:8080/web/ManageServlet"; Map<String, String> params = new HashMap<String, String>(); params.put("title", title); params.put("timelength", length); FormFile formFile = new FormFile(uploadFile, "videofile", "image/gif"); try { return SocketHttpRequester.post(path, params, formFile); } catch (Exception e) { e.printStackTrace(); } return false; }
上傳檔案的構造方法
http協議/** * 上傳檔案 */ public class FormFile { /* 上傳檔案的資料 */ private byte[] data; private InputStream inStream; private File file; /* 檔名稱 */ private String filname; /* 請求引數名稱*/ private String parameterName; /* 內容型別 */ private String contentType = "application/octet-stream"; //資料小時使用這個方法，因為需要寫入記憶體空間，而手機記憶體小 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; } //大資料上傳 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; } }
public class SocketHttpRequester {
/**
* 直接通過HTTP協議提交資料到伺服器,實現如下面表單提交功能:
* <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 上傳路徑(注：避免使用localhost或127.0.0.1這樣的路徑測試，因為它會指向手機模擬器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080這樣的路徑測試)
* @param params 請求引數 key為引數名,value為引數值
* @param file 上傳檔案
*/
public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{
final String BOUNDARY = "---------------------------7da2137580612"; //資料分隔線
final String endline = "--" + BOUNDARY + "--\r\n";//資料結束標誌
int fileDataLength = 0;
for(FormFile uploadFile : files){//得到檔案型別資料的總長度
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()) {//構造文字型別引數的實體資料
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");
}
//沒有使用httpconnection類，內部使用了緩衝技術，容易溢位
//計算傳輸給伺服器的實體資料總長度
int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length;
URL url = new URL(path);
int port = url.getPort()==-1 ? 80 : url.getPort(); //獲得埠
Socket socket = new Socket(InetAddress.getByName(url.getHost()), port); //連結的ip
OutputStream outStream = socket.getOutputStream();
//下面完成HTTP請求頭的傳送
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());
//寫完HTTP請求頭後根據HTTP協議再寫一個回車換行
outStream.write("\r\n".getBytes());
//把所有文字型別的實體資料傳送出來
outStream.write(textEntity.toString().getBytes());
//把所有檔案型別的實體資料傳送出來
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());
//實現邊讀邊寫
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());
}
//下面傳送資料結束標誌，表示資料已經結束
outStream.write(endline.getBytes());
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
if(reader.readLine().indexOf("200")==-1){//讀取web伺服器返回的資料，判斷請求碼是否為200，如果不是200，代表請求失敗
return false;
}
outStream.flush();
outStream.close();
reader.close();
socket.close();
return true;
}
/**
* 提交資料到伺服器
* @param path 上傳路徑(注：避免使用localhost或127.0.0.1這樣的路徑測試，因為它會指向手機模擬器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080這樣的路徑測試)
* @param params 請求引數 key為引數名,value為引數值
* @param file 上傳檔案
*/
public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{
return post(path, params, new FormFile[]{file});
}
/**
* 提交資料到伺服器
* @param path 上傳路徑(注：避免使用localhost或127.0.0.1這樣的路徑測試，因為它會指向手機模擬器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080這樣的路徑測試)
* @param params 請求引數 key為引數名,value為引數值
* @param encode 編碼
*/
public static byte[] postFromHttpClient(String path, Map<String, String> params, String encode) throws Exception{
List<NameValuePair> formparams = new ArrayList<NameValuePair>();//用於存放請求引數
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();//看作是瀏覽器
HttpResponse response = httpclient.execute(httppost);//傳送post請求
return readStream(response.getEntity().getContent());
}
/**
* 傳送請求
* @param path 請求路徑
* @param params 請求引數 key為引數名稱 value為引數值
* @param encode 請求引數的編碼
*/
public static byte[] post(String path, Map<String, String> params, String encode) throws Exception{
//String params = "method=save&name="+ URLEncoder.encode("老畢", "UTF-8")+ "&age=28&";//需要傳送的引數
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);//允許對外發送請求引數
conn.setUseCaches(false);//不進行快取
conn.setConnectTimeout(5 * 1000);
conn.setRequestMethod("POST");
//下面設定http請求頭
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");
//傳送引數
DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.write(data);//把引數傳送出去
outStream.flush();
outStream.close();
if(conn.getResponseCode()==200){
return readStream(conn.getInputStream());
}
return null;
}
/**
* 讀取流
* @param inStream
* @return 位元組陣列
* @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();
}
}