Class Overview
Convenient superclass for Excel document views.
Compatible with Apache POI 3.0 as well as 3.5, as of Spring 3.0.
Properties:
- url (optional): The url of an existing Excel document to pick as a starting point.
It is done without localization part nor the ".xls" extension.
The file will be searched with locations in the following order:
- [url]_[language]_[country].xls
- [url]_[language].xls
- [url].xls
For working with the workbook in the subclass, see
Jakarta's POI site
As an example, you can try this snippet:
protected void buildExcelDocument(
Map<String, Object> model, HSSFWorkbook workbook,
HttpServletRequest request, HttpServletResponse response) {
// Go to the first sheet.
// getSheetAt: only if workbook is created from an existing document
// HSSFSheet sheet = workbook.getSheetAt(0);
HSSFSheet sheet = workbook.createSheet("Spring");
sheet.setDefaultColumnWidth(12);
// Write a text at A1.
HSSFCell cell = getCell(sheet, 0, 0);
setText(cell, "Spring POI test");
// Write the current date at A2.
HSSFCellStyle dateStyle = workbook.createCellStyle();
dateStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy"));
cell = getCell(sheet, 1, 0);
cell.setCellValue(new Date());
cell.setCellStyle(dateStyle);
// Write a number at A3
getCell(sheet, 2, 0).setCellValue(458);
// Write a range of numbers.
HSSFRow sheetRow = sheet.createRow(3);
for (short i = 0; i < 10; i++) {
sheetRow.createCell(i).setCellValue(i * 10);
}
}
This class is similar to the AbstractPdfView class in usage style.
Summary
Public Methods |
void
|
setUrl(String url)
Set the URL of the Excel workbook source, without localization part nor extension.
|
Protected Methods |
abstract
void
|
buildExcelDocument(Map<String, Object> model, HSSFWorkbook workbook, HttpServletRequest request, HttpServletResponse response)
Subclasses must implement this method to create an Excel HSSFWorkbook document,
given the model.
|
boolean
|
generatesDownloadContent()
Return whether this view generates download content
(typically binary content like PDF or Excel files).
|
HSSFCell
|
getCell(HSSFSheet sheet, int row, int col)
Convenient method to obtain the cell in the given sheet, row and column.
|
HSSFWorkbook
|
getTemplateSource(String url, HttpServletRequest request)
Creates the workbook from an existing XLS document.
|
final
void
|
renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response)
Renders the Excel view, given the specified model.
|
void
|
setText(HSSFCell cell, String text)
Convenient method to set a String as text content in a cell.
|
[Expand]
Inherited Methods |
From class
org.springframework.web.servlet.view.AbstractView
void
|
addStaticAttribute(String name, Object value)
Add static data to this view, exposed in each view.
|
RequestContext
|
createRequestContext(HttpServletRequest request, HttpServletResponse response, Map<String, Object> model)
Create a RequestContext to expose under the specified attribute name.
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ByteArrayOutputStream
|
createTemporaryOutputStream()
Create a temporary OutputStream for this view.
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void
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exposeModelAsRequestAttributes(Map<String, Object> model, HttpServletRequest request)
Expose the model objects in the given map as request attributes.
|
boolean
|
generatesDownloadContent()
Return whether this view generates download content
(typically binary content like PDF or Excel files).
|
Map<String, Object>
|
getAttributesMap()
Allow Map access to the static attributes of this view,
with the option to add or override specific entries.
|
String
|
getBeanName()
Return the view's name.
|
String
|
getContentType()
Return the content type for this view.
|
String
|
getRequestContextAttribute()
Return the name of the RequestContext attribute, if any.
|
Map
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getStaticAttributes()
Return the static attributes for this view.
|
void
|
prepareResponse(HttpServletRequest request, HttpServletResponse response)
Prepare the given response for rendering.
|
void
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render(Map<String, ?> model, HttpServletRequest request, HttpServletResponse response)
Prepares the view given the specified model, merging it with static
attributes and a RequestContext attribute, if necessary.
|
abstract
void
|
renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response)
Subclasses must implement this method to actually render the view.
|
void
|
setAttributes(Properties attributes)
Set static attributes for this view from a
java.util.Properties object.
|
void
|
setAttributesCSV(String propString)
Set static attributes as a CSV string.
|
void
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setAttributesMap(Map<String, ?> attributes)
Set static attributes for this view from a Map.
|
void
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setBeanName(String beanName)
Set the view's name.
|
void
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setContentType(String contentType)
Set the content type for this view.
|
void
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setRequestContextAttribute(String requestContextAttribute)
Set the name of the RequestContext attribute for this view.
|
String
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toString()
|
void
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writeToResponse(HttpServletResponse response, ByteArrayOutputStream baos)
Write the given temporary OutputStream to the HTTP response.
|
|
From class
org.springframework.web.context.support.WebApplicationObjectSupport
|
From class
org.springframework.context.support.ApplicationObjectSupport
|
From class
java.lang.Object
Object
|
clone()
|
boolean
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equals(Object arg0)
|
void
|
finalize()
|
final
Class<?>
|
getClass()
|
int
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hashCode()
|
final
void
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notify()
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final
void
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notifyAll()
|
String
|
toString()
|
final
void
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wait()
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final
void
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wait(long arg0, int arg1)
|
final
void
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wait(long arg0)
|
|
From interface
org.springframework.beans.factory.BeanNameAware
abstract
void
|
setBeanName(String name)
Set the name of the bean in the bean factory that created this bean.
|
|
From interface
org.springframework.context.ApplicationContextAware
|
From interface
org.springframework.web.context.ServletContextAware
abstract
void
|
setServletContext(ServletContext servletContext)
Set the ServletContext that this object runs in.
|
|
From interface
org.springframework.web.servlet.View
abstract
String
|
getContentType()
Return the content type of the view, if predetermined.
|
abstract
void
|
render(Map<String, ?> model, HttpServletRequest request, HttpServletResponse response)
Render the view given the specified model.
|
|
Public Constructors
public
AbstractExcelView
()
Default Constructor.
Sets the content type of the view to "application/vnd.ms-excel".
Public Methods
public
void
setUrl
(String url)
Set the URL of the Excel workbook source, without localization part nor extension.
Protected Methods
protected
abstract
void
buildExcelDocument
(Map<String, Object> model, HSSFWorkbook workbook, HttpServletRequest request, HttpServletResponse response)
Subclasses must implement this method to create an Excel HSSFWorkbook document,
given the model.
Parameters
model
| the model Map |
workbook
| the Excel workbook to complete |
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.
|
protected
boolean
generatesDownloadContent
()
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.
protected
HSSFCell
getCell
(HSSFSheet sheet, int row, int col)
Convenient method to obtain the cell in the given sheet, row and column.
Creates the row and the cell if they still doesn't already exist.
Thus, the column can be passed as an int, the method making the needed downcasts.
Parameters
sheet
| a sheet object. The first sheet is usually obtained by workbook.getSheetAt(0) |
row
| thr row number |
col
| the column number |
protected
HSSFWorkbook
getTemplateSource
(String url, HttpServletRequest request)
Creates the workbook from an existing XLS document.
Parameters
url
| the URL of the Excel template without localization part nor extension |
request
| current HTTP request |
protected
final
void
renderMergedOutputModel
(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response)
Renders the Excel view, given the specified model.
Parameters
model
| combined output Map (never null ),
with dynamic values taking precedence over static attributes |
request
| current HTTP request |
response
| current HTTP response |
protected
void
setText
(HSSFCell cell, String text)
Convenient method to set a String as text content in a cell.
Parameters
cell
| the cell in which the text must be put |
text
| the text to put in the cell
|