|
Oracle Multimedia Servlets and JSP Java API Reference 11g Release 1 (11.1) Part No. B28412-01 |
||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object
oracle.ord.im.OrdMultipartFilter
public class OrdMultipartFilter
The OrdMultipartFilter class filters form-based, file-upload servlet requests whose contents are encoded in multipart/form-data format. This class wraps a request object with an OrdMultipartWrapper object that parses the request content.
The OrdMultipartFilter class implements the javax.servlet.Filter interface in servlet 2.3. For any servlet container that supports servlet 2.3, this filter combined with the OrdMultipartWrapper object, provides transparent access to the parameters and files in the servlet request with multipart/form-data encoding.
In order to use the OrdMultipartFilter class, you will need to specify the following in the web.xml file:
<filter> <filter-name>OrdMultipartFilter</filter-name> <filter-class>oracle.ord.im.OrdMultipartFilter</filter-class> <!-- optional configuration parameters <init-param> <param-name>tempDir</param-name> <param-value>/tmp</param-value> <param-name>maxMemory</param-name> <param-value>5000</param-value> </init-param> --> </filter> <filter-mapping> <filter-name>OrdMultipartFilter</filter-name> <url-pattern>*.jsp</url-pattern> </filter-mapping>
And you will need to specify the following in the JSP file:
// // Get the description, location, and photograph. // String id = request.getParameter( "id" ); String description = request.getParameter( "description" ); String location = request.getParameter( "location" ); OrdHttpUploadFile photo = request.getFileParameter( "photo" ); // // Prepare and execute a SQL statement to insert a new row into // the table and return the sequence number for the new row. // Disable auto-commit to allow the LOB to be written correctly. // conn.setAutoCommit( false ); PreparedStatement stmt = conn.prepareStatement( "insert into photo_album (id, description, location, photo) " " values (?, ?, ?, ORDSYS.ORDIMAGE.INIT() )" ); stmt.setString( 1, id ); stmt.setString( 2, description ); stmt.setString( 3, location ); stmt.executeUpdate(); // // Prepare and execute a SQL statement to fetch the new OrdImage // object from the database. // stmt = conn.prepareStatement( "select photo from photo_album where id = ? for update" ); stmt.setString( 1, id ); OracleResultSet rset = (OracleResultSet)stmt.executeQuery(); if ( !rset.next() ) { throw new ServletException( "new row not found in table" ); } OrdImage media = (OrdImage)rset.getORAData( 1, OrdImage.getORADataFactory()); // // Load the photograph into the database and set the properties. // photo.loadImage(media); // // Prepare and execute a SQL statement to update the image object. // stmt = (OraclePreparedStatement)conn.prepareStatement( "update photo_album set photo = ? where id = ?" ); stmt.setORAData( 1, media ); stmt.setString( 2 id ); stmt.execute(); stmt.close(); // // Commit the changes. // conn.commit();
In order to run Oracle Multimedia methods for servlets and JSP, you will need to import classes from the oracle.ord.im package into your Java file.
You may also need to import classes from the following Java packages:
java.sql. java.io. javax.servlet. javax.servlet.http. oracle.jdbc. oracle.sql.
Constructor Summary | |
---|---|
OrdMultipartFilter() |
Method Summary | |
---|---|
void |
destroy() Implements the javax.servlet.Filter interface destroy method that destroys the filter. |
void |
doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain) Implements the javax.servlet.Filter interface doFilter method that handles the servlet request with multipart/form-data encoding. |
void |
init(javax.servlet.FilterConfig config) Implements the javax.servlet.Filter interface init method that initializes the filter. |
Methods inherited from class java.lang.Object |
---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public OrdMultipartFilter()
Method Detail |
---|
public void init(javax.servlet.FilterConfig config) throws javax.servlet.ServletException
init
in interface javax.servlet.Filter
config
- an object of type javax.servlet.FilterConfig
.javax.servlet.ServletException
- if an error occurs in the servlet.public void destroy()
destroy
in interface javax.servlet.Filter
public void doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain) throws java.io.IOException, javax.servlet.ServletException
doFilter
in interface javax.servlet.Filter
request
- the servlet request.response
- the servlet response.chain
- the filters that must be processed.java.io.IOException
- if an error occurs during the IO operation.javax.servlet.ServletException
- if an error occurs in the servlet.
|
Oracle Multimedia Servlets and JSP Java API Reference 11g Release 1 (11.1) Part No. B28412-01 |
||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |