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 Android教程網 >> Android技術 >> 關於Android編程 >> android批量文件上傳(android批量圖片上傳)

android批量文件上傳(android批量圖片上傳)

編輯:關於Android編程

項目中多處用到文件批量上傳功能,今天正好解決了此問題,在此寫出來,以便日後借鑒。
首先,以下架構下的批量文件上傳可能會失敗或者不會成功:
            1.android客戶端+springMVC服務端:服務端采用org.springframework.web.multipart.MultipartHttpServletRequest作為批量上傳接收類,這種搭配下的批量文件上傳會失敗,最終服務端只會接受到一個文件,即只會接受到第一個文件。可能因為MultipartHttpServletRequest對servlet原本的HttpServletRequest類進行封裝,導致批量上傳有問題。
             2.android客戶端+strutsMVC服務端:這種搭配下的多文件上傳,本人沒有親自嘗試,不做評論。如果有網友采用此種方式上傳失敗的,原因可能同1。


接下來說明上傳成功的方案:
          采用android客戶端+Servlet(HttpServletRequest)進行文件上傳。
          Servlet端代碼如下:

DiskFileItemFactory factory = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(factory);
		try
		{
			List items = upload.parseRequest(request);
			Iterator itr = items.iterator();
			while (itr.hasNext())
			{
				FileItem item = (FileItem) itr.next();
				if (item.isFormField())
				{
					System.out.println("表單參數名:" + item.getFieldName() + ",表單參數值:" + item.getString("UTF-8"));
				} 
				else
				{
					if (item.getName() != null && !item.getName().equals(""))
					{
						System.out.println("上傳文件的大小:" + item.getSize());
						System.out.println("上傳文件的類型:" + item.getContentType());
						// item.getName()返回上傳文件在客戶端的完整路徑名稱
						System.out.println("上傳文件的名稱:" + item.getName());

						File tempFile = new File(item.getName());
						// 上傳文件的保存路徑
						File file = new File(sc.getRealPath("/") + savePath, tempFile.getName());
						item.write(file);
						request.setAttribute("upload.message", "上傳文件成功!");
					} else
					{
						request.setAttribute("upload.message", "沒有選擇上傳文件!");
					}
				}
			}
		} 
		catch (FileUploadException e)
		{
			e.printStackTrace();
		} 
		catch (Exception e)
		{
			e.printStackTrace();
			request.setAttribute("upload.message", "上傳文件失敗!");
		}
		request.getRequestDispatcher("/uploadResult.jsp").forward(request, response);

android端代碼如下:

public class SocketHttpRequester {
    /**
     *多文件上傳
     * 直接通過HTTP協議提交數據到服務器,實現如下面表單提交功能:
     *   
* @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.iteye.cn或http://192.168.1.101:8083這樣的路徑測試) * @param params 請求參數 key為參數名,value為參數值 * @param file 上傳文件 */ public static boolean post(String path, Map params, FormFile[] files) throws Exception{ final String BOUNDARY = "---------------------------7da2137580612"; //數據分隔線 final String endline = "--" + BOUNDARY + "--\r\n";//數據結束標志 int fileDataLength = 0; for(FormFile uploadFile : files){//得到文件類型數據的總長度 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"); 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 entry : params.entrySet()) {//構造文本類型參數的實體數據 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"); } //計算傳輸給服務器的實體數據總長度 int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length; URL url = new URL(path); int port = url.getPort()==-1 ? 80 : url.getPort(); Socket socket = new Socket(InetAddress.getByName(url.getHost()), port); OutputStream outStream = socket.getOutputStream(); //下面完成HTTP請求頭的發送 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()); //把所有文本類型的實體數據發送出來 outStream.write(textEntity.toString().getBytes()); //把所有文件類型的實體數據發送出來 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()); 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()); } //下面發送數據結束標志,表示數據已經結束 outStream.write(endline.getBytes()); BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream())); if(reader.readLine().indexOf("200")==-1){//讀取web服務器返回的數據,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; } /** *單文件上傳 * 提交數據到服務器 * @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 請求參數 key為參數名,value為參數值 * @param file 上傳文件 */ public static boolean post(String path, Map params, FormFile file) throws Exception{ return post(path, params, new FormFile[]{file}); } }


FormFile類的代碼如下

public class FormFile {
    /* 上傳文件的數據 */
    private byte[] data;
    private InputStream inStream;
    private File file;
    
    private int fileSize;
    /* 文件名稱 */
    private String filname;
    /* 請求參數名稱*/
    private String parameterName;
    /* 內容類型 */
    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;
    }
    
    
    
    public FormFile(InputStream inStream, int fileSize, String filname,
			String parameterName, String contentType) {
		super();
		this.inStream = inStream;
		this.fileSize = fileSize;
		this.filname = filname;
		this.parameterName = parameterName;
		this.contentType = contentType;
	}
    
    

	public int getFileSize() {
		return fileSize;
	}

	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;
    }
    
}

注:以上android端上傳代碼是從網上借用的,對原作者表示感謝!
     以上代碼經本人測試,能正常進行多文件上傳。

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