android批量文件上傳（android批量圖片上傳）

原文：http://blog.csdn.net/y150481863/article/details/25201085

 

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，以便日后借鑒。
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:
     *   <FORM METHOD=POST ACTION="http://192.168.1.101:8083/upload/servlet/UploadServlet" 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.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<String, String> 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<String, String> 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請求頭后根據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<String, String> 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;
    }
    
}