コード例 #1
0
ファイル: WriteBlob.java プロジェクト: laner19861104/qzkj
  public static void main(String[] args) {

    try {
      DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
      ;
      Connection conn =
          DriverManager.getConnection(
              "jdbc:oracle:thin:@192.168.117.110:1521:WFZF", "qzkj", "qzkj");
      conn.setAutoCommit(false);
      ;

      BLOB blob = null;

      PreparedStatement pstmt =
          conn.prepareStatement("insert into sys_file(uuid,content,name) values(?,empty_blob(),?)");
      String uuid = Tool.getStringUUid();
      pstmt.setString(1, uuid);
      pstmt.setString(2, "test.flv");
      pstmt.executeUpdate();
      pstmt.close();

      pstmt = conn.prepareStatement("select content from sys_file where uuid= ? for update");
      pstmt.setString(1, uuid);
      ResultSet rset = pstmt.executeQuery();
      ;
      if (rset.next()) blob = (BLOB) rset.getBlob(1);
      ;

      String fileName = "test.flv";
      File f =
          new File(
              "C://Documents and Settings//Administrator//桌面//FlvPlayer201002//FlvPlayer201002//"
                  + fileName);
      FileInputStream fin = new FileInputStream(f);
      ;
      System.out.println("file size = " + fin.available());

      pstmt = conn.prepareStatement("update sys_file set content=? where uuid=?");
      ;

      OutputStream out = blob.getBinaryOutputStream();
      ;

      int count = -1, total = 0;
      byte[] data = new byte[(int) fin.available()];
      fin.read(data);
      ;
      out.write(data);
      ;
      /*
      byte[] data = new byte[blob.getBufferSize();];  另一种实现方法,节省内存
      while ((count = fin.read(data);); != -1); {
        total += count;
        out.write(data, 0, count);;
      }
      */

      fin.close();
      ;
      out.close();
      ;

      pstmt.setBlob(1, blob);
      ;
      pstmt.setString(2, uuid);

      pstmt.executeUpdate();
      ;
      pstmt.close();
      ;

      conn.commit();
      ;
      conn.close();
      ;
    } catch (SQLException e) {
      System.err.println(e.getMessage());
      ;
      e.printStackTrace();
    } catch (IOException e) {
      System.err.println(e.getMessage());
      ;
    }
  }
コード例 #2
0
ファイル: UploadImage.java プロジェクト: dragonlet/C391Proj
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // Variable initializations.
    HttpSession session = request.getSession();
    FileItem image_file = null;
    int record_id = 0;
    int image_id;

    // Check if a record ID has been entered.
    if (request.getParameter("recordID") == null || request.getParameter("recordID").equals("")) {
      // If no ID has been entered, send message to jsp.
      response_message =
          "<p><font color=FF0000>No Record ID Detected, Please Enter One.</font></p>";
      session.setAttribute("msg", response_message);
      response.sendRedirect("UploadImage.jsp");
    }

    try {
      // Parse the HTTP request to get the image stream.
      DiskFileUpload fu = new DiskFileUpload();
      // Will get multiple image files if that happens and can be accessed through FileItems.
      List<FileItem> FileItems = fu.parseRequest(request);

      // Connect to the database and create a statement.
      conn = getConnected(drivername, dbstring, username, password);
      stmt = conn.createStatement();

      // Process the uploaded items, assuming only 1 image file uploaded.
      Iterator<FileItem> i = FileItems.iterator();

      while (i.hasNext()) {
        FileItem item = (FileItem) i.next();

        // Test if item is a form field and matches recordID.
        if (item.isFormField()) {
          if (item.getFieldName().equals("recordID")) {
            // Covert record id from string to integer.
            record_id = Integer.parseInt(item.getString());

            String sql = "select count(*) from radiology_record where record_id = " + record_id;
            int count = 0;

            try {
              rset = stmt.executeQuery(sql);

              while (rset != null && rset.next()) {
                count = (rset.getInt(1));
              }
            } catch (SQLException e) {
              response_message = e.getMessage();
            }

            // Check if recordID is in the database.
            if (count == 0) {
              // Invalid recordID, send message to jsp.
              response_message =
                  "<p><font color=FF0000>Record ID Does Not Exist In Database.</font></p>";
              session.setAttribute("msg", response_message);
              // Close connection.
              conn.close();
              response.sendRedirect("UploadImage.jsp");
            }
          }
        } else {
          image_file = item;

          if (image_file.getName().equals("")) {
            // No file, send message to jsp.
            response_message = "<p><font color=FF0000>No File Selected For Record ID.</font></p>";
            session.setAttribute("msg", response_message);
            // Close connection.
            conn.close();
            response.sendRedirect("UploadImage.jsp");
          }
        }
      }

      // Get the image stream.
      InputStream instream = image_file.getInputStream();

      BufferedImage full_image = ImageIO.read(instream);
      BufferedImage thumbnail = shrink(full_image, 10);
      BufferedImage regular_image = shrink(full_image, 5);

      // First, to generate a unique img_id using an SQL sequence.
      rset1 = stmt.executeQuery("SELECT image_id_sequence.nextval from dual");
      rset1.next();
      image_id = rset1.getInt(1);

      // Insert an empty blob into the table first. Note that you have to
      // use the Oracle specific function empty_blob() to create an empty blob.
      stmt.execute(
          "INSERT INTO pacs_images VALUES("
              + record_id
              + ","
              + image_id
              + ", empty_blob(), empty_blob(), empty_blob())");

      // to retrieve the lob_locator
      // Note that you must use "FOR UPDATE" in the select statement
      String cmd = "SELECT * FROM pacs_images WHERE image_id = " + image_id + " FOR UPDATE";
      rset = stmt.executeQuery(cmd);
      rset.next();
      BLOB myblobFull = ((OracleResultSet) rset).getBLOB(5);
      BLOB myblobThumb = ((OracleResultSet) rset).getBLOB(3);
      BLOB myblobRegular = ((OracleResultSet) rset).getBLOB(4);

      // Write the full size image to the blob object.
      OutputStream fullOutstream = myblobFull.getBinaryOutputStream();
      ImageIO.write(full_image, "jpg", fullOutstream);
      // Write the thumbnail size image to the blob object.
      OutputStream thumbOutstream = myblobThumb.getBinaryOutputStream();
      ImageIO.write(thumbnail, "jpg", thumbOutstream);
      // Write the regular size image to the blob object.
      OutputStream regularOutstream = myblobRegular.getBinaryOutputStream();
      ImageIO.write(regular_image, "jpg", regularOutstream);

      // Commit the changes to database.
      stmt.executeUpdate("commit");
      response_message = "<p><font color=00CC00>Upload Successful.</font></p>";
      session.setAttribute("msg", response_message);

      instream.close();
      fullOutstream.close();
      thumbOutstream.close();
      regularOutstream.close();

      // Close connection.
      conn.close();
      response.sendRedirect("UploadImage.jsp");

      instream.close();
      fullOutstream.close();
      thumbOutstream.close();
      regularOutstream.close();

      // Close connection.
      conn.close();
    } catch (Exception ex) {
      response_message = ex.getMessage();
    }
  }