public abstract class

AbstractExcelView

extends AbstractView
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.AbstractExcelView

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.

See Also

Summary

[Expand]
Inherited Constants
From class org.springframework.web.servlet.view.AbstractView
[Expand]
Inherited Fields
From class org.springframework.context.support.ApplicationObjectSupport
From interface org.springframework.web.servlet.View
Public Constructors
AbstractExcelView()
Default Constructor.
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<StringObject> 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<StringObject> 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
From class org.springframework.web.context.support.WebApplicationObjectSupport
From class org.springframework.context.support.ApplicationObjectSupport
From class java.lang.Object
From interface org.springframework.beans.factory.BeanNameAware
From interface org.springframework.context.ApplicationContextAware
From interface org.springframework.web.context.ServletContextAware
From interface org.springframework.web.servlet.View

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<StringObject> 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.
Throws
Exception

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
Returns
  • the HSSFCell

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
Returns
  • the HSSFWorkbook
Throws
Exception in case of failure

protected final void renderMergedOutputModel (Map<StringObject> 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
Throws
Exception

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