org.springframework.web.servlet.view.document

Class AbstractXlsView

java.lang.Object

org.springframework.context.support.ApplicationObjectSupport

org.springframework.web.context.support.WebApplicationObjectSupport

org.springframework.web.servlet.view.AbstractView

org.springframework.web.servlet.view.document.AbstractXlsView

All Implemented Interfaces:

Aware, BeanNameAware, ApplicationContextAware, ServletContextAware, View

Direct Known Subclasses:

AbstractXlsxView

public abstract class AbstractXlsView
extends AbstractView

Convenient superclass for Excel document views in traditional XLS format. Compatible with Apache POI 3.5 and higher.

For working with the workbook in the subclass, see Apache's POI site

Since:

4.2

Author:

Juergen Hoeller

Field Summary

Fields inherited from class org.springframework.web.servlet.view.AbstractView

DEFAULT_CONTENT_TYPE

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

logger

Fields inherited from interface org.springframework.web.servlet.View

PATH_VARIABLES, RESPONSE_STATUS_ATTRIBUTE, SELECTED_CONTENT_TYPE

Constructor Summary

Constructors

Constructor and Description
AbstractXlsView() Default Constructor.

Method Summary

Modifier and Type	Method and Description
protected abstract void	buildExcelDocument(Map<String,Object> model, org.apache.poi.ss.usermodel.Workbook workbook, HttpServletRequest request, HttpServletResponse response) Application-provided subclasses must implement this method to populate the Excel workbook document, given the model.
protected org.apache.poi.ss.usermodel.Workbook	createWorkbook(Map<String,Object> model, HttpServletRequest request) Template method for creating the POI Workbook instance.
protected boolean	generatesDownloadContent() Return whether this view generates download content (typically binary content like PDF or Excel files).
protected void	renderMergedOutputModel(Map<String,Object> model, HttpServletRequest request, HttpServletResponse response) Renders the Excel view, given the specified model.
protected void	renderWorkbook(org.apache.poi.ss.usermodel.Workbook workbook, HttpServletResponse response) The actual render step: taking the POI Workbook and rendering it to the given response.

Methods inherited from class org.springframework.web.servlet.view.AbstractView

addStaticAttribute, createMergedOutputModel, createRequestContext, createTemporaryOutputStream, exposeModelAsRequestAttributes, getAttributesMap, getBeanName, getContentType, getRequestContextAttribute, getRequestToExpose, getStaticAttributes, isExposePathVariables, prepareResponse, render, setAttributes, setAttributesCSV, setAttributesMap, setBeanName, setContentType, setExposeContextBeansAsAttributes, setExposedContextBeanNames, setExposePathVariables, setRequestContextAttribute, setResponseContentType, toString, writeToResponse

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, initApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AbstractXlsView

public AbstractXlsView()

Default Constructor. Sets the content type of the view to "application/vnd.ms-excel".

Method Detail

generatesDownloadContent

protected boolean generatesDownloadContent()

Description copied from class: AbstractView

Return whether this view generates download content (typically binary content like PDF or Excel files).

The default implementation returns false. Subclasses are encouraged to return true here if they know that they are generating download content that requires temporary caching on the client side, typically via the response OutputStream.

Overrides:

generatesDownloadContent in class AbstractView

See Also:

AbstractView.prepareResponse(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse), ServletResponse.getOutputStream()

renderMergedOutputModel

protected final void renderMergedOutputModel(Map<String,Object> model,
                                             HttpServletRequest request,
                                             HttpServletResponse response)
                                      throws Exception

Renders the Excel view, given the specified model.

Specified by:

renderMergedOutputModel in class AbstractView

Parameters:

model - combined output Map (never null), with dynamic values taking precedence over static attributes

request - current HTTP request

response - current HTTP response

Throws:

Exception - if rendering failed

createWorkbook

protected org.apache.poi.ss.usermodel.Workbook createWorkbook(Map<String,Object> model,
                                                              HttpServletRequest request)

Template method for creating the POI Workbook instance.

The default implementation creates a traditional HSSFWorkbook. Spring-provided subclasses are overriding this for the OOXML-based variants; custom subclasses may override this for reading a workbook from a file.

Parameters:

model - the model Map

request - current HTTP request (for taking the URL or headers into account)

Returns:

the new Workbook instance

renderWorkbook

protected void renderWorkbook(org.apache.poi.ss.usermodel.Workbook workbook,
                              HttpServletResponse response)
                       throws IOException

The actual render step: taking the POI Workbook and rendering it to the given response.

Parameters:

workbook - the POI Workbook to render

response - current HTTP response

Throws:

IOException - when thrown by I/O methods that we're delegating to

buildExcelDocument

protected abstract void buildExcelDocument(Map<String,Object> model,
                                           org.apache.poi.ss.usermodel.Workbook workbook,
                                           HttpServletRequest request,
                                           HttpServletResponse response)
                                    throws Exception

Application-provided subclasses must implement this method to populate the Excel workbook document, given the model.

Parameters:

model - the model Map

workbook - the Excel workbook to populate

request - in case we need locale etc. Shouldn't look at attributes.

response - in case we need to set cookies. Shouldn't write to it.

Throws:

Exception