- Requestdispatcher in java servlet
- Field Summary
- Method Summary
- Field Detail
- FORWARD_REQUEST_URI
- FORWARD_CONTEXT_PATH
- FORWARD_MAPPING
- FORWARD_PATH_INFO
- FORWARD_SERVLET_PATH
- FORWARD_QUERY_STRING
- INCLUDE_REQUEST_URI
- INCLUDE_CONTEXT_PATH
- INCLUDE_PATH_INFO
- INCLUDE_MAPPING
- INCLUDE_SERVLET_PATH
- INCLUDE_QUERY_STRING
- ERROR_EXCEPTION
- ERROR_EXCEPTION_TYPE
- ERROR_MESSAGE
- ERROR_REQUEST_URI
- ERROR_SERVLET_NAME
- ERROR_STATUS_CODE
- Method Detail
- forward
- include
- Requestdispatcher in java servlet
- Field Summary
- Method Summary
- Field Detail
- FORWARD_REQUEST_URI
- FORWARD_CONTEXT_PATH
- FORWARD_PATH_INFO
- FORWARD_SERVLET_PATH
- FORWARD_QUERY_STRING
- INCLUDE_REQUEST_URI
- INCLUDE_CONTEXT_PATH
- INCLUDE_PATH_INFO
- INCLUDE_SERVLET_PATH
- INCLUDE_QUERY_STRING
- ERROR_EXCEPTION
- ERROR_EXCEPTION_TYPE
- ERROR_MESSAGE
- ERROR_REQUEST_URI
- ERROR_SERVLET_NAME
- ERROR_STATUS_CODE
- Method Detail
- forward
- include
Requestdispatcher in java servlet
Defines an object that receives requests from the client and sends them to any resource (such as a servlet, HTML file, or JSP file) on the server. The servlet container creates the RequestDispatcher object, which is used as a wrapper around a server resource located at a particular path or given by a particular name. This interface is intended to wrap servlets, but a servlet container can create RequestDispatcher objects to wrap any type of resource.
Field Summary
The name of the request attribute under which the exception object is propagated during an error dispatch
The name of the request attribute under which the type of the exception object is propagated during an error dispatch
The name of the request attribute under which the exception message is propagated during an error dispatch
The name of the request attribute under which the request URI whose processing caused the error is propagated during an error dispatch
The name of the request attribute under which the name of the servlet in which the error occurred is propagated during an error dispatch
The name of the request attribute under which the response status is propagated during an error dispatch
The name of the request attribute under which the original context path is made available to the target of a forward
The name of the request attribute under which the original HttpServletMapping is made available to the target of a forward
The name of the request attribute under which the original path info is made available to the target of a forward
The name of the request attribute under which the original query string is made available to the target of a forward
The name of the request attribute under which the original request URI is made available to the target of a forward
The name of the request attribute under which the original servlet path is made available to the target of a forward
The name of the request attribute under which the HttpServletMapping of the target of an include is stored
Method Summary
Forwards a request from a servlet to another resource (servlet, JSP file, or HTML file) on the server.
Field Detail
FORWARD_REQUEST_URI
The name of the request attribute under which the original request URI is made available to the target of a forward
FORWARD_CONTEXT_PATH
The name of the request attribute under which the original context path is made available to the target of a forward
FORWARD_MAPPING
The name of the request attribute under which the original HttpServletMapping is made available to the target of a forward
FORWARD_PATH_INFO
The name of the request attribute under which the original path info is made available to the target of a forward
FORWARD_SERVLET_PATH
The name of the request attribute under which the original servlet path is made available to the target of a forward
FORWARD_QUERY_STRING
The name of the request attribute under which the original query string is made available to the target of a forward
INCLUDE_REQUEST_URI
INCLUDE_CONTEXT_PATH
INCLUDE_PATH_INFO
INCLUDE_MAPPING
The name of the request attribute under which the HttpServletMapping of the target of an include is stored
INCLUDE_SERVLET_PATH
INCLUDE_QUERY_STRING
ERROR_EXCEPTION
The name of the request attribute under which the exception object is propagated during an error dispatch
ERROR_EXCEPTION_TYPE
The name of the request attribute under which the type of the exception object is propagated during an error dispatch
ERROR_MESSAGE
The name of the request attribute under which the exception message is propagated during an error dispatch
ERROR_REQUEST_URI
The name of the request attribute under which the request URI whose processing caused the error is propagated during an error dispatch
ERROR_SERVLET_NAME
The name of the request attribute under which the name of the servlet in which the error occurred is propagated during an error dispatch
ERROR_STATUS_CODE
The name of the request attribute under which the response status is propagated during an error dispatch
Method Detail
forward
void forward(ServletRequest request, ServletResponse response) throws ServletException, IOException
Forwards a request from a servlet to another resource (servlet, JSP file, or HTML file) on the server. This method allows one servlet to do preliminary processing of a request and another resource to generate the response. For a RequestDispatcher obtained via getRequestDispatcher() , the ServletRequest object has its path elements and parameters adjusted to match the path of the target resource. forward should be called before the response has been committed to the client (before response body output has been flushed). If the response already has been committed, this method throws an IllegalStateException . Uncommitted output in the response buffer is automatically cleared before the forward. The request and response parameters must be either the same objects as were passed to the calling servlet’s service method or be subclasses of the ServletRequestWrapper or ServletResponseWrapper classes that wrap them. This method sets the dispatcher type of the given request to DispatcherType.FORWARD .
include
void include(ServletRequest request, ServletResponse response) throws ServletException, IOException
Includes the content of a resource (servlet, JSP page, HTML file) in the response. In essence, this method enables programmatic server-side includes. The ServletResponse object has its path elements and parameters remain unchanged from the caller’s. The included servlet cannot change the response status code or set headers; any attempt to make a change is ignored. The request and response parameters must be either the same objects as were passed to the calling servlet’s service method or be subclasses of the ServletRequestWrapper or ServletResponseWrapper classes that wrap them. This method sets the dispatcher type of the given request to DispatcherType.INCLUDE .
Requestdispatcher in java servlet
Defines an object that receives requests from the client and sends them to any resource (such as a servlet, HTML file, or JSP file) on the server. The servlet container creates the RequestDispatcher object, which is used as a wrapper around a server resource located at a particular path or given by a particular name. This interface is intended to wrap servlets, but a servlet container can create RequestDispatcher objects to wrap any type of resource.
Field Summary
The name of the request attribute under which the exception object is propagated during an error dispatch
The name of the request attribute under which the type of the exception object is propagated during an error dispatch
The name of the request attribute under which the exception message is propagated during an error dispatch
The name of the request attribute under which the request URI whose processing caused the error is propagated during an error dispatch
The name of the request attribute under which the name of the servlet in which the error occurred is propagated during an error dispatch
The name of the request attribute under which the response status is propagated during an error dispatch
The name of the request attribute under which the original context path is made available to the target of a forward
The name of the request attribute under which the original path info is made available to the target of a forward
The name of the request attribute under which the original query string is made available to the target of a forward
The name of the request attribute under which the original request URI is made available to the target of a forward
The name of the request attribute under which the original servlet path is made available to the target of a forward
Method Summary
Forwards a request from a servlet to another resource (servlet, JSP file, or HTML file) on the server.
Field Detail
FORWARD_REQUEST_URI
The name of the request attribute under which the original request URI is made available to the target of a forward
FORWARD_CONTEXT_PATH
The name of the request attribute under which the original context path is made available to the target of a forward
FORWARD_PATH_INFO
The name of the request attribute under which the original path info is made available to the target of a forward
FORWARD_SERVLET_PATH
The name of the request attribute under which the original servlet path is made available to the target of a forward
FORWARD_QUERY_STRING
The name of the request attribute under which the original query string is made available to the target of a forward
INCLUDE_REQUEST_URI
INCLUDE_CONTEXT_PATH
INCLUDE_PATH_INFO
INCLUDE_SERVLET_PATH
INCLUDE_QUERY_STRING
ERROR_EXCEPTION
The name of the request attribute under which the exception object is propagated during an error dispatch
ERROR_EXCEPTION_TYPE
The name of the request attribute under which the type of the exception object is propagated during an error dispatch
ERROR_MESSAGE
The name of the request attribute under which the exception message is propagated during an error dispatch
ERROR_REQUEST_URI
The name of the request attribute under which the request URI whose processing caused the error is propagated during an error dispatch
ERROR_SERVLET_NAME
The name of the request attribute under which the name of the servlet in which the error occurred is propagated during an error dispatch
ERROR_STATUS_CODE
The name of the request attribute under which the response status is propagated during an error dispatch
Method Detail
forward
void forward(ServletRequest request, ServletResponse response) throws ServletException, IOException
Forwards a request from a servlet to another resource (servlet, JSP file, or HTML file) on the server. This method allows one servlet to do preliminary processing of a request and another resource to generate the response. For a RequestDispatcher obtained via getRequestDispatcher() , the ServletRequest object has its path elements and parameters adjusted to match the path of the target resource. forward should be called before the response has been committed to the client (before response body output has been flushed). If the response already has been committed, this method throws an IllegalStateException . Uncommitted output in the response buffer is automatically cleared before the forward. The request and response parameters must be either the same objects as were passed to the calling servlet’s service method or be subclasses of the ServletRequestWrapper or ServletResponseWrapper classes that wrap them. This method sets the dispatcher type of the given request to DispatcherType.FORWARD .
include
void include(ServletRequest request, ServletResponse response) throws ServletException, IOException
Includes the content of a resource (servlet, JSP page, HTML file) in the response. In essence, this method enables programmatic server-side includes. The ServletResponse object has its path elements and parameters remain unchanged from the caller’s. The included servlet cannot change the response status code or set headers; any attempt to make a change is ignored. The request and response parameters must be either the same objects as were passed to the calling servlet’s service method or be subclasses of the ServletRequestWrapper or ServletResponseWrapper classes that wrap them. This method sets the dispatcher type of the given request to DispatcherType.INCLUDE .